1 13b2bc37 2022-10-23 stsp /*
   2 13b2bc37 2022-10-23 stsp  * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
   3 13b2bc37 2022-10-23 stsp  *
   4 13b2bc37 2022-10-23 stsp  * Permission to use, copy, modify, and distribute this software for any
   5 13b2bc37 2022-10-23 stsp  * purpose with or without fee is hereby granted, provided that the above
   6 13b2bc37 2022-10-23 stsp  * copyright notice and this permission notice appear in all copies.
   7 13b2bc37 2022-10-23 stsp  *
   8 13b2bc37 2022-10-23 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9 13b2bc37 2022-10-23 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10 13b2bc37 2022-10-23 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11 13b2bc37 2022-10-23 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12 13b2bc37 2022-10-23 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13 13b2bc37 2022-10-23 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14 13b2bc37 2022-10-23 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15 13b2bc37 2022-10-23 stsp  */
  16 13b2bc37 2022-10-23 stsp 
  17 13b2bc37 2022-10-23 stsp #include <sys/queue.h>
  18 13b2bc37 2022-10-23 stsp #include <sys/tree.h>
  19 13b2bc37 2022-10-23 stsp #include <sys/time.h>
  20 13b2bc37 2022-10-23 stsp #include <sys/types.h>
  21 13b2bc37 2022-10-23 stsp #include <sys/stat.h>
  22 13b2bc37 2022-10-23 stsp #include <sys/socket.h>
  23 13b2bc37 2022-10-23 stsp #include <sys/un.h>
  24 13b2bc37 2022-10-23 stsp #include <sys/wait.h>
  25 13b2bc37 2022-10-23 stsp 
  26 13b2bc37 2022-10-23 stsp #include <fcntl.h>
  27 13b2bc37 2022-10-23 stsp #include <err.h>
  28 13b2bc37 2022-10-23 stsp #include <errno.h>
  29 13b2bc37 2022-10-23 stsp #include <event.h>
  30 13b2bc37 2022-10-23 stsp #include <limits.h>
  31 13b2bc37 2022-10-23 stsp #include <pwd.h>
  32 13b2bc37 2022-10-23 stsp #include <imsg.h>
  33 13b2bc37 2022-10-23 stsp #include <sha1.h>
  34 13b2bc37 2022-10-23 stsp #include <signal.h>
  35 13b2bc37 2022-10-23 stsp #include <siphash.h>
  36 13b2bc37 2022-10-23 stsp #include <stdarg.h>
  37 13b2bc37 2022-10-23 stsp #include <stdio.h>
  38 13b2bc37 2022-10-23 stsp #include <stdlib.h>
  39 13b2bc37 2022-10-23 stsp #include <string.h>
  40 13b2bc37 2022-10-23 stsp #include <syslog.h>
  41 13b2bc37 2022-10-23 stsp #include <unistd.h>
  42 13b2bc37 2022-10-23 stsp 
  43 13b2bc37 2022-10-23 stsp #include "got_error.h"
  44 13b2bc37 2022-10-23 stsp #include "got_opentemp.h"
  45 13b2bc37 2022-10-23 stsp #include "got_path.h"
  46 13b2bc37 2022-10-23 stsp #include "got_repository.h"
  47 13b2bc37 2022-10-23 stsp #include "got_object.h"
  48 13b2bc37 2022-10-23 stsp #include "got_reference.h"
  49 13b2bc37 2022-10-23 stsp 
  50 13b2bc37 2022-10-23 stsp #include "got_lib_delta.h"
  51 13b2bc37 2022-10-23 stsp #include "got_lib_object.h"
  52 13b2bc37 2022-10-23 stsp #include "got_lib_object_cache.h"
  53 13b2bc37 2022-10-23 stsp #include "got_lib_sha1.h"
  54 13b2bc37 2022-10-23 stsp #include "got_lib_gitproto.h"
  55 13b2bc37 2022-10-23 stsp #include "got_lib_pack.h"
  56 13b2bc37 2022-10-23 stsp #include "got_lib_repository.h"
  57 13b2bc37 2022-10-23 stsp 
  58 13b2bc37 2022-10-23 stsp #include "gotd.h"
  59 13b2bc37 2022-10-23 stsp #include "log.h"
  60 d93ecf7d 2022-12-14 stsp #include "listen.h"
  61 0ccf3acb 2022-11-16 stsp #include "auth.h"
  62 13b2bc37 2022-10-23 stsp #include "repo_read.h"
  63 13b2bc37 2022-10-23 stsp #include "repo_write.h"
  64 13b2bc37 2022-10-23 stsp 
  65 13b2bc37 2022-10-23 stsp #ifndef nitems
  66 13b2bc37 2022-10-23 stsp #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
  67 13b2bc37 2022-10-23 stsp #endif
  68 13b2bc37 2022-10-23 stsp 
  69 13b2bc37 2022-10-23 stsp struct gotd_client {
  70 13b2bc37 2022-10-23 stsp 	STAILQ_ENTRY(gotd_client)	 entry;
  71 13b2bc37 2022-10-23 stsp 	enum gotd_client_state		 state;
  72 13b2bc37 2022-10-23 stsp 	struct gotd_client_capability	*capabilities;
  73 13b2bc37 2022-10-23 stsp 	size_t				 ncapa_alloc;
  74 13b2bc37 2022-10-23 stsp 	size_t				 ncapabilities;
  75 13b2bc37 2022-10-23 stsp 	uint32_t			 id;
  76 13b2bc37 2022-10-23 stsp 	int				 fd;
  77 13b2bc37 2022-10-23 stsp 	int				 delta_cache_fd;
  78 13b2bc37 2022-10-23 stsp 	struct gotd_imsgev		 iev;
  79 13b2bc37 2022-10-23 stsp 	struct event			 tmo;
  80 13b2bc37 2022-10-23 stsp 	uid_t				 euid;
  81 13b2bc37 2022-10-23 stsp 	gid_t				 egid;
  82 13b2bc37 2022-10-23 stsp 	struct gotd_child_proc		*repo_read;
  83 13b2bc37 2022-10-23 stsp 	struct gotd_child_proc		*repo_write;
  84 5e25db14 2022-12-29 stsp 	struct gotd_child_proc		*auth;
  85 5e25db14 2022-12-29 stsp 	int				 required_auth;
  86 13b2bc37 2022-10-23 stsp 	char				*packfile_path;
  87 13b2bc37 2022-10-23 stsp 	char				*packidx_path;
  88 13b2bc37 2022-10-23 stsp 	int				 nref_updates;
  89 13b2bc37 2022-10-23 stsp };
  90 13b2bc37 2022-10-23 stsp STAILQ_HEAD(gotd_clients, gotd_client);
  91 13b2bc37 2022-10-23 stsp 
  92 13b2bc37 2022-10-23 stsp static struct gotd_clients gotd_clients[GOTD_CLIENT_TABLE_SIZE];
  93 13b2bc37 2022-10-23 stsp static SIPHASH_KEY clients_hash_key;
  94 13b2bc37 2022-10-23 stsp volatile int client_cnt;
  95 ef4e2f01 2022-12-29 stsp static struct timeval auth_timeout = { 5, 0 };
  96 13b2bc37 2022-10-23 stsp static struct gotd gotd;
  97 13b2bc37 2022-10-23 stsp 
  98 13b2bc37 2022-10-23 stsp void gotd_sighdlr(int sig, short event, void *arg);
  99 f1752522 2022-10-29 stsp static void gotd_shutdown(void);
 100 b50a2b46 2022-12-29 stsp static const struct got_error *start_repo_child(struct gotd_client *,
 101 b50a2b46 2022-12-29 stsp     enum gotd_procid, struct gotd_repo *, char *, const char *, int, int);
 102 5e25db14 2022-12-29 stsp static const struct got_error *start_auth_child(struct gotd_client *, int,
 103 5e25db14 2022-12-29 stsp     struct gotd_repo *, char *, const char *, int, int);
 104 b50a2b46 2022-12-29 stsp static void kill_proc(struct gotd_child_proc *, int);
 105 13b2bc37 2022-10-23 stsp 
 106 13b2bc37 2022-10-23 stsp __dead static void
 107 13b2bc37 2022-10-23 stsp usage()
 108 13b2bc37 2022-10-23 stsp {
 109 88dec179 2022-10-24 stsp 	fprintf(stderr, "usage: %s [-dv] [-f config-file]\n", getprogname());
 110 88dec179 2022-10-24 stsp 	exit(1);
 111 13b2bc37 2022-10-23 stsp }
 112 13b2bc37 2022-10-23 stsp 
 113 13b2bc37 2022-10-23 stsp static int
 114 13b2bc37 2022-10-23 stsp unix_socket_listen(const char *unix_socket_path, uid_t uid, gid_t gid)
 115 13b2bc37 2022-10-23 stsp {
 116 13b2bc37 2022-10-23 stsp 	struct sockaddr_un sun;
 117 13b2bc37 2022-10-23 stsp 	int fd = -1;
 118 13b2bc37 2022-10-23 stsp 	mode_t old_umask, mode;
 119 13b2bc37 2022-10-23 stsp 
 120 13b2bc37 2022-10-23 stsp 	fd = socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK| SOCK_CLOEXEC, 0);
 121 13b2bc37 2022-10-23 stsp 	if (fd == -1) {
 122 13b2bc37 2022-10-23 stsp 		log_warn("socket");
 123 13b2bc37 2022-10-23 stsp 		return -1;
 124 13b2bc37 2022-10-23 stsp 	}
 125 13b2bc37 2022-10-23 stsp 
 126 13b2bc37 2022-10-23 stsp 	sun.sun_family = AF_UNIX;
 127 13b2bc37 2022-10-23 stsp 	if (strlcpy(sun.sun_path, unix_socket_path,
 128 13b2bc37 2022-10-23 stsp 	    sizeof(sun.sun_path)) >= sizeof(sun.sun_path)) {
 129 13b2bc37 2022-10-23 stsp 		log_warnx("%s: name too long", unix_socket_path);
 130 13b2bc37 2022-10-23 stsp 		close(fd);
 131 13b2bc37 2022-10-23 stsp 		return -1;
 132 13b2bc37 2022-10-23 stsp 	}
 133 13b2bc37 2022-10-23 stsp 
 134 13b2bc37 2022-10-23 stsp 	if (unlink(unix_socket_path) == -1) {
 135 13b2bc37 2022-10-23 stsp 		if (errno != ENOENT) {
 136 13b2bc37 2022-10-23 stsp 			log_warn("unlink %s", unix_socket_path);
 137 13b2bc37 2022-10-23 stsp 			close(fd);
 138 13b2bc37 2022-10-23 stsp 			return -1;
 139 13b2bc37 2022-10-23 stsp 		}
 140 13b2bc37 2022-10-23 stsp 	}
 141 13b2bc37 2022-10-23 stsp 
 142 13b2bc37 2022-10-23 stsp 	old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
 143 6f854dde 2023-01-04 stsp 	mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH;
 144 13b2bc37 2022-10-23 stsp 
 145 13b2bc37 2022-10-23 stsp 	if (bind(fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
 146 13b2bc37 2022-10-23 stsp 		log_warn("bind: %s", unix_socket_path);
 147 13b2bc37 2022-10-23 stsp 		close(fd);
 148 13b2bc37 2022-10-23 stsp 		umask(old_umask);
 149 13b2bc37 2022-10-23 stsp 		return -1;
 150 13b2bc37 2022-10-23 stsp 	}
 151 13b2bc37 2022-10-23 stsp 
 152 13b2bc37 2022-10-23 stsp 	umask(old_umask);
 153 13b2bc37 2022-10-23 stsp 
 154 13b2bc37 2022-10-23 stsp 	if (chmod(unix_socket_path, mode) == -1) {
 155 13b2bc37 2022-10-23 stsp 		log_warn("chmod %o %s", mode, unix_socket_path);
 156 13b2bc37 2022-10-23 stsp 		close(fd);
 157 13b2bc37 2022-10-23 stsp 		unlink(unix_socket_path);
 158 13b2bc37 2022-10-23 stsp 		return -1;
 159 13b2bc37 2022-10-23 stsp 	}
 160 13b2bc37 2022-10-23 stsp 
 161 13b2bc37 2022-10-23 stsp 	if (chown(unix_socket_path, uid, gid) == -1) {
 162 13b2bc37 2022-10-23 stsp 		log_warn("chown %s uid=%d gid=%d", unix_socket_path, uid, gid);
 163 13b2bc37 2022-10-23 stsp 		close(fd);
 164 13b2bc37 2022-10-23 stsp 		unlink(unix_socket_path);
 165 13b2bc37 2022-10-23 stsp 		return -1;
 166 13b2bc37 2022-10-23 stsp 	}
 167 13b2bc37 2022-10-23 stsp 
 168 13b2bc37 2022-10-23 stsp 	if (listen(fd, GOTD_UNIX_SOCKET_BACKLOG) == -1) {
 169 13b2bc37 2022-10-23 stsp 		log_warn("listen");
 170 13b2bc37 2022-10-23 stsp 		close(fd);
 171 13b2bc37 2022-10-23 stsp 		unlink(unix_socket_path);
 172 13b2bc37 2022-10-23 stsp 		return -1;
 173 13b2bc37 2022-10-23 stsp 	}
 174 13b2bc37 2022-10-23 stsp 
 175 13b2bc37 2022-10-23 stsp 	return fd;
 176 13b2bc37 2022-10-23 stsp }
 177 13b2bc37 2022-10-23 stsp 
 178 13b2bc37 2022-10-23 stsp static uint64_t
 179 13b2bc37 2022-10-23 stsp client_hash(uint32_t client_id)
 180 13b2bc37 2022-10-23 stsp {
 181 13b2bc37 2022-10-23 stsp 	return SipHash24(&clients_hash_key, &client_id, sizeof(client_id));
 182 13b2bc37 2022-10-23 stsp }
 183 13b2bc37 2022-10-23 stsp 
 184 13b2bc37 2022-10-23 stsp static void
 185 13b2bc37 2022-10-23 stsp add_client(struct gotd_client *client)
 186 13b2bc37 2022-10-23 stsp {
 187 13b2bc37 2022-10-23 stsp 	uint64_t slot = client_hash(client->id) % nitems(gotd_clients);
 188 13b2bc37 2022-10-23 stsp 	STAILQ_INSERT_HEAD(&gotd_clients[slot], client, entry);
 189 13b2bc37 2022-10-23 stsp 	client_cnt++;
 190 13b2bc37 2022-10-23 stsp }
 191 13b2bc37 2022-10-23 stsp 
 192 13b2bc37 2022-10-23 stsp static struct gotd_client *
 193 13b2bc37 2022-10-23 stsp find_client(uint32_t client_id)
 194 13b2bc37 2022-10-23 stsp {
 195 13b2bc37 2022-10-23 stsp 	uint64_t slot;
 196 13b2bc37 2022-10-23 stsp 	struct gotd_client *c;
 197 13b2bc37 2022-10-23 stsp 
 198 13b2bc37 2022-10-23 stsp 	slot = client_hash(client_id) % nitems(gotd_clients);
 199 13b2bc37 2022-10-23 stsp 	STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
 200 13b2bc37 2022-10-23 stsp 		if (c->id == client_id)
 201 13b2bc37 2022-10-23 stsp 			return c;
 202 13b2bc37 2022-10-23 stsp 	}
 203 13b2bc37 2022-10-23 stsp 
 204 13b2bc37 2022-10-23 stsp 	return NULL;
 205 13b2bc37 2022-10-23 stsp }
 206 13b2bc37 2022-10-23 stsp 
 207 13b2bc37 2022-10-23 stsp static struct gotd_child_proc *
 208 13b2bc37 2022-10-23 stsp get_client_proc(struct gotd_client *client)
 209 13b2bc37 2022-10-23 stsp {
 210 13b2bc37 2022-10-23 stsp 	if (client->repo_read && client->repo_write) {
 211 13b2bc37 2022-10-23 stsp 		fatalx("uid %d is reading and writing in the same session",
 212 13b2bc37 2022-10-23 stsp 		    client->euid);
 213 13b2bc37 2022-10-23 stsp 		/* NOTREACHED */
 214 13b2bc37 2022-10-23 stsp 	}
 215 13b2bc37 2022-10-23 stsp 
 216 13b2bc37 2022-10-23 stsp 	if (client->repo_read)
 217 13b2bc37 2022-10-23 stsp 		return client->repo_read;
 218 13b2bc37 2022-10-23 stsp 	else if (client->repo_write)
 219 13b2bc37 2022-10-23 stsp 		return client->repo_write;
 220 b50a2b46 2022-12-29 stsp 
 221 b50a2b46 2022-12-29 stsp 	return NULL;
 222 b50a2b46 2022-12-29 stsp }
 223 b50a2b46 2022-12-29 stsp 
 224 b50a2b46 2022-12-29 stsp static struct gotd_client *
 225 b50a2b46 2022-12-29 stsp find_client_by_proc_fd(int fd)
 226 b50a2b46 2022-12-29 stsp {
 227 b50a2b46 2022-12-29 stsp 	uint64_t slot;
 228 b50a2b46 2022-12-29 stsp 
 229 b50a2b46 2022-12-29 stsp 	for (slot = 0; slot < nitems(gotd_clients); slot++) {
 230 b50a2b46 2022-12-29 stsp 		struct gotd_client *c;
 231 b50a2b46 2022-12-29 stsp 
 232 b50a2b46 2022-12-29 stsp 		STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
 233 b50a2b46 2022-12-29 stsp 			struct gotd_child_proc *proc = get_client_proc(c);
 234 b50a2b46 2022-12-29 stsp 			if (proc && proc->iev.ibuf.fd == fd)
 235 b50a2b46 2022-12-29 stsp 				return c;
 236 5e25db14 2022-12-29 stsp 			if (c->auth && c->auth->iev.ibuf.fd == fd)
 237 5e25db14 2022-12-29 stsp 				return c;
 238 b50a2b46 2022-12-29 stsp 		}
 239 b50a2b46 2022-12-29 stsp 	}
 240 f1752522 2022-10-29 stsp 
 241 13b2bc37 2022-10-23 stsp 	return NULL;
 242 13b2bc37 2022-10-23 stsp }
 243 13b2bc37 2022-10-23 stsp 
 244 13b2bc37 2022-10-23 stsp static int
 245 13b2bc37 2022-10-23 stsp client_is_reading(struct gotd_client *client)
 246 13b2bc37 2022-10-23 stsp {
 247 13b2bc37 2022-10-23 stsp 	return client->repo_read != NULL;
 248 13b2bc37 2022-10-23 stsp }
 249 13b2bc37 2022-10-23 stsp 
 250 13b2bc37 2022-10-23 stsp static int
 251 13b2bc37 2022-10-23 stsp client_is_writing(struct gotd_client *client)
 252 13b2bc37 2022-10-23 stsp {
 253 13b2bc37 2022-10-23 stsp 	return client->repo_write != NULL;
 254 13b2bc37 2022-10-23 stsp }
 255 13b2bc37 2022-10-23 stsp 
 256 13b2bc37 2022-10-23 stsp static const struct got_error *
 257 13b2bc37 2022-10-23 stsp ensure_client_is_reading(struct gotd_client *client)
 258 13b2bc37 2022-10-23 stsp {
 259 13b2bc37 2022-10-23 stsp 	if (!client_is_reading(client)) {
 260 13b2bc37 2022-10-23 stsp 		return got_error_fmt(GOT_ERR_BAD_PACKET,
 261 13b2bc37 2022-10-23 stsp 		    "uid %d made a read-request but is not reading from "
 262 13b2bc37 2022-10-23 stsp 		    "a repository", client->euid);
 263 13b2bc37 2022-10-23 stsp 	}
 264 13b2bc37 2022-10-23 stsp 
 265 13b2bc37 2022-10-23 stsp 	return NULL;
 266 13b2bc37 2022-10-23 stsp }
 267 13b2bc37 2022-10-23 stsp 
 268 13b2bc37 2022-10-23 stsp static const struct got_error *
 269 13b2bc37 2022-10-23 stsp ensure_client_is_writing(struct gotd_client *client)
 270 13b2bc37 2022-10-23 stsp {
 271 13b2bc37 2022-10-23 stsp 	if (!client_is_writing(client)) {
 272 13b2bc37 2022-10-23 stsp 		return got_error_fmt(GOT_ERR_BAD_PACKET,
 273 13b2bc37 2022-10-23 stsp 		    "uid %d made a write-request but is not writing to "
 274 13b2bc37 2022-10-23 stsp 		    "a repository", client->euid);
 275 13b2bc37 2022-10-23 stsp 	}
 276 13b2bc37 2022-10-23 stsp 
 277 13b2bc37 2022-10-23 stsp 	return NULL;
 278 13b2bc37 2022-10-23 stsp }
 279 13b2bc37 2022-10-23 stsp 
 280 13b2bc37 2022-10-23 stsp static const struct got_error *
 281 13b2bc37 2022-10-23 stsp ensure_client_is_not_writing(struct gotd_client *client)
 282 13b2bc37 2022-10-23 stsp {
 283 13b2bc37 2022-10-23 stsp 	if (client_is_writing(client)) {
 284 13b2bc37 2022-10-23 stsp 		return got_error_fmt(GOT_ERR_BAD_PACKET,
 285 13b2bc37 2022-10-23 stsp 		    "uid %d made a read-request but is writing to "
 286 13b2bc37 2022-10-23 stsp 		    "a repository", client->euid);
 287 13b2bc37 2022-10-23 stsp 	}
 288 13b2bc37 2022-10-23 stsp 
 289 13b2bc37 2022-10-23 stsp 	return NULL;
 290 13b2bc37 2022-10-23 stsp }
 291 13b2bc37 2022-10-23 stsp 
 292 13b2bc37 2022-10-23 stsp static const struct got_error *
 293 13b2bc37 2022-10-23 stsp ensure_client_is_not_reading(struct gotd_client *client)
 294 13b2bc37 2022-10-23 stsp {
 295 13b2bc37 2022-10-23 stsp 	if (client_is_reading(client)) {
 296 13b2bc37 2022-10-23 stsp 		return got_error_fmt(GOT_ERR_BAD_PACKET,
 297 13b2bc37 2022-10-23 stsp 		    "uid %d made a write-request but is reading from "
 298 13b2bc37 2022-10-23 stsp 		    "a repository", client->euid);
 299 13b2bc37 2022-10-23 stsp 	}
 300 13b2bc37 2022-10-23 stsp 
 301 13b2bc37 2022-10-23 stsp 	return NULL;
 302 b50a2b46 2022-12-29 stsp }
 303 b50a2b46 2022-12-29 stsp 
 304 b50a2b46 2022-12-29 stsp static void
 305 5e25db14 2022-12-29 stsp wait_for_child(pid_t child_pid)
 306 b50a2b46 2022-12-29 stsp {
 307 b50a2b46 2022-12-29 stsp 	pid_t pid;
 308 b50a2b46 2022-12-29 stsp 	int status;
 309 b50a2b46 2022-12-29 stsp 
 310 5e25db14 2022-12-29 stsp 	log_debug("waiting for child PID %ld to terminate",
 311 5e25db14 2022-12-29 stsp 	    (long)child_pid);
 312 b50a2b46 2022-12-29 stsp 
 313 b50a2b46 2022-12-29 stsp 	do {
 314 5e25db14 2022-12-29 stsp 		pid = waitpid(child_pid, &status, WNOHANG);
 315 b50a2b46 2022-12-29 stsp 		if (pid == -1) {
 316 b50a2b46 2022-12-29 stsp 			if (errno != EINTR && errno != ECHILD)
 317 b50a2b46 2022-12-29 stsp 				fatal("wait");
 318 b50a2b46 2022-12-29 stsp 		} else if (WIFSIGNALED(status)) {
 319 b50a2b46 2022-12-29 stsp 			log_warnx("child PID %ld terminated; signal %d",
 320 b50a2b46 2022-12-29 stsp 			    (long)pid, WTERMSIG(status));
 321 7fdc3e58 2022-12-30 mark 		}
 322 b50a2b46 2022-12-29 stsp 	} while (pid != -1 || (pid == -1 && errno == EINTR));
 323 13b2bc37 2022-10-23 stsp }
 324 13b2bc37 2022-10-23 stsp 
 325 13b2bc37 2022-10-23 stsp static void
 326 5e25db14 2022-12-29 stsp kill_auth_proc(struct gotd_client *client)
 327 5e25db14 2022-12-29 stsp {
 328 5e25db14 2022-12-29 stsp 	struct gotd_child_proc *proc;
 329 5e25db14 2022-12-29 stsp 
 330 5e25db14 2022-12-29 stsp 	if (client->auth == NULL)
 331 5e25db14 2022-12-29 stsp 		return;
 332 5e25db14 2022-12-29 stsp 
 333 5e25db14 2022-12-29 stsp 	proc = client->auth;
 334 5e25db14 2022-12-29 stsp 	client->auth = NULL;
 335 5e25db14 2022-12-29 stsp 
 336 5e25db14 2022-12-29 stsp 	event_del(&proc->iev.ev);
 337 5e25db14 2022-12-29 stsp 	msgbuf_clear(&proc->iev.ibuf.w);
 338 5e25db14 2022-12-29 stsp 	close(proc->iev.ibuf.fd);
 339 5e25db14 2022-12-29 stsp 	kill_proc(proc, 0);
 340 5e25db14 2022-12-29 stsp 	wait_for_child(proc->pid);
 341 5e25db14 2022-12-29 stsp 	free(proc);
 342 5e25db14 2022-12-29 stsp }
 343 5e25db14 2022-12-29 stsp 
 344 5e25db14 2022-12-29 stsp static void
 345 13b2bc37 2022-10-23 stsp disconnect(struct gotd_client *client)
 346 13b2bc37 2022-10-23 stsp {
 347 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_disconnect idisconnect;
 348 13b2bc37 2022-10-23 stsp 	struct gotd_child_proc *proc = get_client_proc(client);
 349 b50a2b46 2022-12-29 stsp 	struct gotd_child_proc *listen_proc = &gotd.listen_proc;
 350 13b2bc37 2022-10-23 stsp 	uint64_t slot;
 351 13b2bc37 2022-10-23 stsp 
 352 13b2bc37 2022-10-23 stsp 	log_debug("uid %d: disconnecting", client->euid);
 353 5e25db14 2022-12-29 stsp 
 354 5e25db14 2022-12-29 stsp 	kill_auth_proc(client);
 355 13b2bc37 2022-10-23 stsp 
 356 13b2bc37 2022-10-23 stsp 	idisconnect.client_id = client->id;
 357 f1752522 2022-10-29 stsp 	if (proc) {
 358 f1752522 2022-10-29 stsp 		if (gotd_imsg_compose_event(&proc->iev,
 359 f1752522 2022-10-29 stsp 		    GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
 360 f1752522 2022-10-29 stsp 		    &idisconnect, sizeof(idisconnect)) == -1)
 361 f1752522 2022-10-29 stsp 			log_warn("imsg compose DISCONNECT");
 362 b50a2b46 2022-12-29 stsp 
 363 b50a2b46 2022-12-29 stsp 		msgbuf_clear(&proc->iev.ibuf.w);
 364 b50a2b46 2022-12-29 stsp 		close(proc->iev.ibuf.fd);
 365 b50a2b46 2022-12-29 stsp 		kill_proc(proc, 0);
 366 5e25db14 2022-12-29 stsp 		wait_for_child(proc->pid);
 367 b50a2b46 2022-12-29 stsp 		free(proc);
 368 b50a2b46 2022-12-29 stsp 		proc = NULL;
 369 f1752522 2022-10-29 stsp 	}
 370 d93ecf7d 2022-12-14 stsp 
 371 d93ecf7d 2022-12-14 stsp 	if (gotd_imsg_compose_event(&listen_proc->iev,
 372 d93ecf7d 2022-12-14 stsp 	    GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
 373 d93ecf7d 2022-12-14 stsp 	    &idisconnect, sizeof(idisconnect)) == -1)
 374 d93ecf7d 2022-12-14 stsp 		log_warn("imsg compose DISCONNECT");
 375 d93ecf7d 2022-12-14 stsp 
 376 13b2bc37 2022-10-23 stsp 	slot = client_hash(client->id) % nitems(gotd_clients);
 377 13b2bc37 2022-10-23 stsp 	STAILQ_REMOVE(&gotd_clients[slot], client, gotd_client, entry);
 378 13b2bc37 2022-10-23 stsp 	imsg_clear(&client->iev.ibuf);
 379 13b2bc37 2022-10-23 stsp 	event_del(&client->iev.ev);
 380 13b2bc37 2022-10-23 stsp 	evtimer_del(&client->tmo);
 381 13b2bc37 2022-10-23 stsp 	close(client->fd);
 382 13b2bc37 2022-10-23 stsp 	if (client->delta_cache_fd != -1)
 383 13b2bc37 2022-10-23 stsp 		close(client->delta_cache_fd);
 384 13b2bc37 2022-10-23 stsp 	if (client->packfile_path) {
 385 13b2bc37 2022-10-23 stsp 		if (unlink(client->packfile_path) == -1 && errno != ENOENT)
 386 13b2bc37 2022-10-23 stsp 			log_warn("unlink %s: ", client->packfile_path);
 387 13b2bc37 2022-10-23 stsp 		free(client->packfile_path);
 388 13b2bc37 2022-10-23 stsp 	}
 389 13b2bc37 2022-10-23 stsp 	if (client->packidx_path) {
 390 13b2bc37 2022-10-23 stsp 		if (unlink(client->packidx_path) == -1 && errno != ENOENT)
 391 13b2bc37 2022-10-23 stsp 			log_warn("unlink %s: ", client->packidx_path);
 392 13b2bc37 2022-10-23 stsp 		free(client->packidx_path);
 393 13b2bc37 2022-10-23 stsp 	}
 394 13b2bc37 2022-10-23 stsp 	free(client->capabilities);
 395 13b2bc37 2022-10-23 stsp 	free(client);
 396 13b2bc37 2022-10-23 stsp 	client_cnt--;
 397 13b2bc37 2022-10-23 stsp }
 398 13b2bc37 2022-10-23 stsp 
 399 13b2bc37 2022-10-23 stsp static void
 400 13b2bc37 2022-10-23 stsp disconnect_on_error(struct gotd_client *client, const struct got_error *err)
 401 13b2bc37 2022-10-23 stsp {
 402 13b2bc37 2022-10-23 stsp 	struct imsgbuf ibuf;
 403 13b2bc37 2022-10-23 stsp 
 404 13b2bc37 2022-10-23 stsp 	log_warnx("uid %d: %s", client->euid, err->msg);
 405 13b2bc37 2022-10-23 stsp 	if (err->code != GOT_ERR_EOF) {
 406 13b2bc37 2022-10-23 stsp 		imsg_init(&ibuf, client->fd);
 407 13b2bc37 2022-10-23 stsp 		gotd_imsg_send_error(&ibuf, 0, PROC_GOTD, err);
 408 13b2bc37 2022-10-23 stsp 		imsg_clear(&ibuf);
 409 13b2bc37 2022-10-23 stsp 	}
 410 13b2bc37 2022-10-23 stsp 	disconnect(client);
 411 f1752522 2022-10-29 stsp }
 412 f1752522 2022-10-29 stsp 
 413 f1752522 2022-10-29 stsp static const struct got_error *
 414 f1752522 2022-10-29 stsp send_repo_info(struct gotd_imsgev *iev, struct gotd_repo *repo)
 415 f1752522 2022-10-29 stsp {
 416 f1752522 2022-10-29 stsp 	const struct got_error *err = NULL;
 417 f1752522 2022-10-29 stsp 	struct gotd_imsg_info_repo irepo;
 418 f1752522 2022-10-29 stsp 
 419 f1752522 2022-10-29 stsp 	memset(&irepo, 0, sizeof(irepo));
 420 f1752522 2022-10-29 stsp 
 421 f1752522 2022-10-29 stsp 	if (strlcpy(irepo.repo_name, repo->name, sizeof(irepo.repo_name))
 422 f1752522 2022-10-29 stsp 	    >= sizeof(irepo.repo_name))
 423 f1752522 2022-10-29 stsp 		return got_error_msg(GOT_ERR_NO_SPACE, "repo name too long");
 424 f1752522 2022-10-29 stsp 	if (strlcpy(irepo.repo_path, repo->path, sizeof(irepo.repo_path))
 425 f1752522 2022-10-29 stsp 	    >= sizeof(irepo.repo_path))
 426 f1752522 2022-10-29 stsp 		return got_error_msg(GOT_ERR_NO_SPACE, "repo path too long");
 427 f1752522 2022-10-29 stsp 
 428 f1752522 2022-10-29 stsp 	if (gotd_imsg_compose_event(iev, GOTD_IMSG_INFO_REPO, PROC_GOTD, -1,
 429 f1752522 2022-10-29 stsp 	    &irepo, sizeof(irepo)) == -1) {
 430 f1752522 2022-10-29 stsp 		err = got_error_from_errno("imsg compose INFO_REPO");
 431 f1752522 2022-10-29 stsp 		if (err)
 432 f1752522 2022-10-29 stsp 			return err;
 433 f1752522 2022-10-29 stsp 	}
 434 f1752522 2022-10-29 stsp 
 435 f1752522 2022-10-29 stsp 	return NULL;
 436 13b2bc37 2022-10-23 stsp }
 437 13b2bc37 2022-10-23 stsp 
 438 f1752522 2022-10-29 stsp static const struct got_error *
 439 f1752522 2022-10-29 stsp send_capability(struct gotd_client_capability *capa, struct gotd_imsgev* iev)
 440 f1752522 2022-10-29 stsp {
 441 f1752522 2022-10-29 stsp 	const struct got_error *err = NULL;
 442 f1752522 2022-10-29 stsp 	struct gotd_imsg_capability icapa;
 443 f1752522 2022-10-29 stsp 	size_t len;
 444 f1752522 2022-10-29 stsp 	struct ibuf *wbuf;
 445 f1752522 2022-10-29 stsp 
 446 f1752522 2022-10-29 stsp 	memset(&icapa, 0, sizeof(icapa));
 447 f1752522 2022-10-29 stsp 
 448 f1752522 2022-10-29 stsp 	icapa.key_len = strlen(capa->key);
 449 f1752522 2022-10-29 stsp 	len = sizeof(icapa) + icapa.key_len;
 450 f1752522 2022-10-29 stsp 	if (capa->value) {
 451 f1752522 2022-10-29 stsp 		icapa.value_len = strlen(capa->value);
 452 f1752522 2022-10-29 stsp 		len += icapa.value_len;
 453 f1752522 2022-10-29 stsp 	}
 454 f1752522 2022-10-29 stsp 
 455 f1752522 2022-10-29 stsp 	wbuf = imsg_create(&iev->ibuf, GOTD_IMSG_CAPABILITY, 0, 0, len);
 456 f1752522 2022-10-29 stsp 	if (wbuf == NULL) {
 457 f1752522 2022-10-29 stsp 		err = got_error_from_errno("imsg_create CAPABILITY");
 458 f1752522 2022-10-29 stsp 		return err;
 459 f1752522 2022-10-29 stsp 	}
 460 f1752522 2022-10-29 stsp 
 461 f1752522 2022-10-29 stsp 	if (imsg_add(wbuf, &icapa, sizeof(icapa)) == -1)
 462 f1752522 2022-10-29 stsp 		return got_error_from_errno("imsg_add CAPABILITY");
 463 f1752522 2022-10-29 stsp 	if (imsg_add(wbuf, capa->key, icapa.key_len) == -1)
 464 f1752522 2022-10-29 stsp 		return got_error_from_errno("imsg_add CAPABILITY");
 465 f1752522 2022-10-29 stsp 	if (capa->value) {
 466 f1752522 2022-10-29 stsp 		if (imsg_add(wbuf, capa->value, icapa.value_len) == -1)
 467 f1752522 2022-10-29 stsp 			return got_error_from_errno("imsg_add CAPABILITY");
 468 f1752522 2022-10-29 stsp 	}
 469 f1752522 2022-10-29 stsp 
 470 f1752522 2022-10-29 stsp 	wbuf->fd = -1;
 471 f1752522 2022-10-29 stsp 	imsg_close(&iev->ibuf, wbuf);
 472 f1752522 2022-10-29 stsp 
 473 f1752522 2022-10-29 stsp 	gotd_imsg_event_add(iev);
 474 f1752522 2022-10-29 stsp 
 475 f1752522 2022-10-29 stsp 	return NULL;
 476 f1752522 2022-10-29 stsp }
 477 f1752522 2022-10-29 stsp 
 478 f1752522 2022-10-29 stsp static const struct got_error *
 479 f1752522 2022-10-29 stsp send_client_info(struct gotd_imsgev *iev, struct gotd_client *client)
 480 f1752522 2022-10-29 stsp {
 481 f1752522 2022-10-29 stsp 	const struct got_error *err = NULL;
 482 f1752522 2022-10-29 stsp 	struct gotd_imsg_info_client iclient;
 483 f1752522 2022-10-29 stsp 	struct gotd_child_proc *proc;
 484 f1752522 2022-10-29 stsp 	size_t i;
 485 f1752522 2022-10-29 stsp 
 486 f1752522 2022-10-29 stsp 	memset(&iclient, 0, sizeof(iclient));
 487 f1752522 2022-10-29 stsp 	iclient.euid = client->euid;
 488 f1752522 2022-10-29 stsp 	iclient.egid = client->egid;
 489 f1752522 2022-10-29 stsp 
 490 f1752522 2022-10-29 stsp 	proc = get_client_proc(client);
 491 f1752522 2022-10-29 stsp 	if (proc) {
 492 eec68231 2022-12-14 stsp 		if (strlcpy(iclient.repo_name, proc->repo_path,
 493 f1752522 2022-10-29 stsp 		    sizeof(iclient.repo_name)) >= sizeof(iclient.repo_name)) {
 494 f1752522 2022-10-29 stsp 			return got_error_msg(GOT_ERR_NO_SPACE,
 495 f1752522 2022-10-29 stsp 			    "repo name too long");
 496 f1752522 2022-10-29 stsp 		}
 497 f1752522 2022-10-29 stsp 		if (client_is_writing(client))
 498 f1752522 2022-10-29 stsp 			iclient.is_writing = 1;
 499 f1752522 2022-10-29 stsp 	}
 500 f1752522 2022-10-29 stsp 
 501 f1752522 2022-10-29 stsp 	iclient.state = client->state;
 502 f1752522 2022-10-29 stsp 	iclient.ncapabilities = client->ncapabilities;
 503 f1752522 2022-10-29 stsp 
 504 f1752522 2022-10-29 stsp 	if (gotd_imsg_compose_event(iev, GOTD_IMSG_INFO_CLIENT, PROC_GOTD, -1,
 505 f1752522 2022-10-29 stsp 	    &iclient, sizeof(iclient)) == -1) {
 506 f1752522 2022-10-29 stsp 		err = got_error_from_errno("imsg compose INFO_CLIENT");
 507 f1752522 2022-10-29 stsp 		if (err)
 508 f1752522 2022-10-29 stsp 			return err;
 509 f1752522 2022-10-29 stsp 	}
 510 f1752522 2022-10-29 stsp 
 511 f1752522 2022-10-29 stsp 	for (i = 0; i < client->ncapabilities; i++) {
 512 f1752522 2022-10-29 stsp 		struct gotd_client_capability *capa;
 513 f1752522 2022-10-29 stsp 		capa = &client->capabilities[i];
 514 f1752522 2022-10-29 stsp 		err = send_capability(capa, iev);
 515 f1752522 2022-10-29 stsp 		if (err)
 516 f1752522 2022-10-29 stsp 			return err;
 517 f1752522 2022-10-29 stsp 	}
 518 f1752522 2022-10-29 stsp 
 519 f1752522 2022-10-29 stsp 	return NULL;
 520 f1752522 2022-10-29 stsp }
 521 f1752522 2022-10-29 stsp 
 522 f1752522 2022-10-29 stsp static const struct got_error *
 523 f1752522 2022-10-29 stsp send_info(struct gotd_client *client)
 524 f1752522 2022-10-29 stsp {
 525 f1752522 2022-10-29 stsp 	const struct got_error *err = NULL;
 526 f1752522 2022-10-29 stsp 	struct gotd_imsg_info info;
 527 f1752522 2022-10-29 stsp 	uint64_t slot;
 528 f1752522 2022-10-29 stsp 	struct gotd_repo *repo;
 529 f1752522 2022-10-29 stsp 
 530 78433331 2023-01-04 stsp 	if (client->euid != 0)
 531 78433331 2023-01-04 stsp 		return got_error_set_errno(EPERM, "info");
 532 78433331 2023-01-04 stsp 
 533 f1752522 2022-10-29 stsp 	info.pid = gotd.pid;
 534 f1752522 2022-10-29 stsp 	info.verbosity = gotd.verbosity;
 535 f1752522 2022-10-29 stsp 	info.nrepos = gotd.nrepos;
 536 f1752522 2022-10-29 stsp 	info.nclients = client_cnt - 1;
 537 f1752522 2022-10-29 stsp 
 538 f1752522 2022-10-29 stsp 	if (gotd_imsg_compose_event(&client->iev, GOTD_IMSG_INFO, PROC_GOTD, -1,
 539 f1752522 2022-10-29 stsp 	    &info, sizeof(info)) == -1) {
 540 f1752522 2022-10-29 stsp 		err = got_error_from_errno("imsg compose INFO");
 541 f1752522 2022-10-29 stsp 		if (err)
 542 f1752522 2022-10-29 stsp 			return err;
 543 f1752522 2022-10-29 stsp 	}
 544 f1752522 2022-10-29 stsp 
 545 f1752522 2022-10-29 stsp 	TAILQ_FOREACH(repo, &gotd.repos, entry) {
 546 f1752522 2022-10-29 stsp 		err = send_repo_info(&client->iev, repo);
 547 f1752522 2022-10-29 stsp 		if (err)
 548 f1752522 2022-10-29 stsp 			return err;
 549 f1752522 2022-10-29 stsp 	}
 550 f1752522 2022-10-29 stsp 
 551 f1752522 2022-10-29 stsp 	for (slot = 0; slot < nitems(gotd_clients); slot++) {
 552 f1752522 2022-10-29 stsp 		struct gotd_client *c;
 553 f1752522 2022-10-29 stsp 		STAILQ_FOREACH(c, &gotd_clients[slot], entry) {
 554 f1752522 2022-10-29 stsp 			if (c->id == client->id)
 555 f1752522 2022-10-29 stsp 				continue;
 556 f1752522 2022-10-29 stsp 			err = send_client_info(&client->iev, c);
 557 f1752522 2022-10-29 stsp 			if (err)
 558 f1752522 2022-10-29 stsp 				return err;
 559 f1752522 2022-10-29 stsp 		}
 560 f1752522 2022-10-29 stsp 	}
 561 f1752522 2022-10-29 stsp 
 562 f1752522 2022-10-29 stsp 	return NULL;
 563 f1752522 2022-10-29 stsp }
 564 f1752522 2022-10-29 stsp 
 565 f1752522 2022-10-29 stsp static const struct got_error *
 566 f1752522 2022-10-29 stsp stop_gotd(struct gotd_client *client)
 567 f1752522 2022-10-29 stsp {
 568 f1752522 2022-10-29 stsp 
 569 f1752522 2022-10-29 stsp 	if (client->euid != 0)
 570 f1752522 2022-10-29 stsp 		return got_error_set_errno(EPERM, "stop");
 571 f1752522 2022-10-29 stsp 
 572 f1752522 2022-10-29 stsp 	gotd_shutdown();
 573 f1752522 2022-10-29 stsp 	/* NOTREACHED */
 574 0ccf3acb 2022-11-16 stsp 	return NULL;
 575 0ccf3acb 2022-11-16 stsp }
 576 0ccf3acb 2022-11-16 stsp 
 577 0ccf3acb 2022-11-16 stsp static struct gotd_repo *
 578 0ccf3acb 2022-11-16 stsp find_repo_by_name(const char *repo_name)
 579 0ccf3acb 2022-11-16 stsp {
 580 0ccf3acb 2022-11-16 stsp 	struct gotd_repo *repo;
 581 0ccf3acb 2022-11-16 stsp 	size_t namelen;
 582 0ccf3acb 2022-11-16 stsp 
 583 0ccf3acb 2022-11-16 stsp 	TAILQ_FOREACH(repo, &gotd.repos, entry) {
 584 0ccf3acb 2022-11-16 stsp 		namelen = strlen(repo->name);
 585 0ccf3acb 2022-11-16 stsp 		if (strncmp(repo->name, repo_name, namelen) != 0)
 586 0ccf3acb 2022-11-16 stsp 			continue;
 587 0ccf3acb 2022-11-16 stsp 		if (repo_name[namelen] == '\0' ||
 588 0ccf3acb 2022-11-16 stsp 		    strcmp(&repo_name[namelen], ".git") == 0)
 589 0ccf3acb 2022-11-16 stsp 			return repo;
 590 13b2bc37 2022-10-23 stsp 	}
 591 13b2bc37 2022-10-23 stsp 
 592 13b2bc37 2022-10-23 stsp 	return NULL;
 593 13b2bc37 2022-10-23 stsp }
 594 13b2bc37 2022-10-23 stsp 
 595 13b2bc37 2022-10-23 stsp static const struct got_error *
 596 b50a2b46 2022-12-29 stsp start_client_session(struct gotd_client *client, struct imsg *imsg)
 597 13b2bc37 2022-10-23 stsp {
 598 13b2bc37 2022-10-23 stsp 	const struct got_error *err;
 599 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_list_refs ireq;
 600 0ccf3acb 2022-11-16 stsp 	struct gotd_repo *repo = NULL;
 601 13b2bc37 2022-10-23 stsp 	size_t datalen;
 602 13b2bc37 2022-10-23 stsp 
 603 13b2bc37 2022-10-23 stsp 	log_debug("list-refs request from uid %d", client->euid);
 604 13b2bc37 2022-10-23 stsp 
 605 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 606 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ireq))
 607 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 608 13b2bc37 2022-10-23 stsp 
 609 13b2bc37 2022-10-23 stsp 	memcpy(&ireq, imsg->data, datalen);
 610 13b2bc37 2022-10-23 stsp 
 611 13b2bc37 2022-10-23 stsp 	if (ireq.client_is_reading) {
 612 13b2bc37 2022-10-23 stsp 		err = ensure_client_is_not_writing(client);
 613 13b2bc37 2022-10-23 stsp 		if (err)
 614 13b2bc37 2022-10-23 stsp 			return err;
 615 0ccf3acb 2022-11-16 stsp 		repo = find_repo_by_name(ireq.repo_name);
 616 0ccf3acb 2022-11-16 stsp 		if (repo == NULL)
 617 0ccf3acb 2022-11-16 stsp 			return got_error(GOT_ERR_NOT_GIT_REPO);
 618 5e25db14 2022-12-29 stsp 		err = start_auth_child(client, GOTD_AUTH_READ, repo,
 619 b50a2b46 2022-12-29 stsp 		    gotd.argv0, gotd.confpath, gotd.daemonize,
 620 b50a2b46 2022-12-29 stsp 		    gotd.verbosity);
 621 b50a2b46 2022-12-29 stsp 		if (err)
 622 b50a2b46 2022-12-29 stsp 			return err;
 623 13b2bc37 2022-10-23 stsp 	} else {
 624 13b2bc37 2022-10-23 stsp 		err = ensure_client_is_not_reading(client);
 625 0ccf3acb 2022-11-16 stsp 		if (err)
 626 0ccf3acb 2022-11-16 stsp 			return err;
 627 0ccf3acb 2022-11-16 stsp 		repo = find_repo_by_name(ireq.repo_name);
 628 0ccf3acb 2022-11-16 stsp 		if (repo == NULL)
 629 0ccf3acb 2022-11-16 stsp 			return got_error(GOT_ERR_NOT_GIT_REPO);
 630 5e25db14 2022-12-29 stsp 		err = start_auth_child(client,
 631 5e25db14 2022-12-29 stsp 		    GOTD_AUTH_READ | GOTD_AUTH_WRITE,
 632 5e25db14 2022-12-29 stsp 		    repo, gotd.argv0, gotd.confpath, gotd.daemonize,
 633 b50a2b46 2022-12-29 stsp 		    gotd.verbosity);
 634 b50a2b46 2022-12-29 stsp 		if (err)
 635 b50a2b46 2022-12-29 stsp 			return err;
 636 13b2bc37 2022-10-23 stsp 	}
 637 13b2bc37 2022-10-23 stsp 
 638 5e25db14 2022-12-29 stsp 	/* Flow continues upon authentication successs/failure or timeout. */
 639 13b2bc37 2022-10-23 stsp 	return NULL;
 640 13b2bc37 2022-10-23 stsp }
 641 13b2bc37 2022-10-23 stsp 
 642 13b2bc37 2022-10-23 stsp static const struct got_error *
 643 13b2bc37 2022-10-23 stsp forward_want(struct gotd_client *client, struct imsg *imsg)
 644 13b2bc37 2022-10-23 stsp {
 645 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_want ireq;
 646 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_want iwant;
 647 13b2bc37 2022-10-23 stsp 	size_t datalen;
 648 13b2bc37 2022-10-23 stsp 
 649 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 650 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ireq))
 651 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 652 13b2bc37 2022-10-23 stsp 
 653 13b2bc37 2022-10-23 stsp 	memcpy(&ireq, imsg->data, datalen);
 654 13b2bc37 2022-10-23 stsp 
 655 13b2bc37 2022-10-23 stsp 	memset(&iwant, 0, sizeof(iwant));
 656 13b2bc37 2022-10-23 stsp 	memcpy(iwant.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
 657 13b2bc37 2022-10-23 stsp 	iwant.client_id = client->id;
 658 13b2bc37 2022-10-23 stsp 
 659 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(&client->repo_read->iev, GOTD_IMSG_WANT,
 660 13b2bc37 2022-10-23 stsp 	    PROC_GOTD, -1, &iwant, sizeof(iwant)) == -1)
 661 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg compose WANT");
 662 13b2bc37 2022-10-23 stsp 
 663 13b2bc37 2022-10-23 stsp 	return NULL;
 664 13b2bc37 2022-10-23 stsp }
 665 13b2bc37 2022-10-23 stsp 
 666 13b2bc37 2022-10-23 stsp static const struct got_error *
 667 13b2bc37 2022-10-23 stsp forward_ref_update(struct gotd_client *client, struct imsg *imsg)
 668 13b2bc37 2022-10-23 stsp {
 669 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
 670 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_ref_update ireq;
 671 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_ref_update *iref = NULL;
 672 13b2bc37 2022-10-23 stsp 	size_t datalen;
 673 13b2bc37 2022-10-23 stsp 
 674 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 675 13b2bc37 2022-10-23 stsp 	if (datalen < sizeof(ireq))
 676 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 677 13b2bc37 2022-10-23 stsp 	memcpy(&ireq, imsg->data, sizeof(ireq));
 678 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ireq) + ireq.name_len)
 679 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 680 13b2bc37 2022-10-23 stsp 
 681 13b2bc37 2022-10-23 stsp 	iref = malloc(datalen);
 682 13b2bc37 2022-10-23 stsp 	if (iref == NULL)
 683 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("malloc");
 684 13b2bc37 2022-10-23 stsp 	memcpy(iref, imsg->data, datalen);
 685 13b2bc37 2022-10-23 stsp 
 686 13b2bc37 2022-10-23 stsp 	iref->client_id = client->id;
 687 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(&client->repo_write->iev,
 688 13b2bc37 2022-10-23 stsp 	    GOTD_IMSG_REF_UPDATE, PROC_GOTD, -1, iref, datalen) == -1)
 689 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg compose REF_UPDATE");
 690 13b2bc37 2022-10-23 stsp 	free(iref);
 691 13b2bc37 2022-10-23 stsp 	return err;
 692 13b2bc37 2022-10-23 stsp }
 693 13b2bc37 2022-10-23 stsp 
 694 13b2bc37 2022-10-23 stsp static const struct got_error *
 695 13b2bc37 2022-10-23 stsp forward_have(struct gotd_client *client, struct imsg *imsg)
 696 13b2bc37 2022-10-23 stsp {
 697 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_have ireq;
 698 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_have ihave;
 699 13b2bc37 2022-10-23 stsp 	size_t datalen;
 700 13b2bc37 2022-10-23 stsp 
 701 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 702 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(ireq))
 703 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 704 13b2bc37 2022-10-23 stsp 
 705 13b2bc37 2022-10-23 stsp 	memcpy(&ireq, imsg->data, datalen);
 706 13b2bc37 2022-10-23 stsp 
 707 13b2bc37 2022-10-23 stsp 	memset(&ihave, 0, sizeof(ihave));
 708 13b2bc37 2022-10-23 stsp 	memcpy(ihave.object_id, ireq.object_id, SHA1_DIGEST_LENGTH);
 709 13b2bc37 2022-10-23 stsp 	ihave.client_id = client->id;
 710 13b2bc37 2022-10-23 stsp 
 711 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(&client->repo_read->iev, GOTD_IMSG_HAVE,
 712 13b2bc37 2022-10-23 stsp 	    PROC_GOTD, -1, &ihave, sizeof(ihave)) == -1)
 713 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg compose HAVE");
 714 13b2bc37 2022-10-23 stsp 
 715 13b2bc37 2022-10-23 stsp 	return NULL;
 716 13b2bc37 2022-10-23 stsp }
 717 13b2bc37 2022-10-23 stsp 
 718 13b2bc37 2022-10-23 stsp static int
 719 13b2bc37 2022-10-23 stsp client_has_capability(struct gotd_client *client, const char *capastr)
 720 13b2bc37 2022-10-23 stsp {
 721 13b2bc37 2022-10-23 stsp 	struct gotd_client_capability *capa;
 722 13b2bc37 2022-10-23 stsp 	size_t i;
 723 13b2bc37 2022-10-23 stsp 
 724 13b2bc37 2022-10-23 stsp 	if (client->ncapabilities == 0)
 725 13b2bc37 2022-10-23 stsp 		return 0;
 726 13b2bc37 2022-10-23 stsp 
 727 13b2bc37 2022-10-23 stsp 	for (i = 0; i < client->ncapabilities; i++) {
 728 13b2bc37 2022-10-23 stsp 		capa = &client->capabilities[i];
 729 13b2bc37 2022-10-23 stsp 		if (strcmp(capa->key, capastr) == 0)
 730 13b2bc37 2022-10-23 stsp 			return 1;
 731 13b2bc37 2022-10-23 stsp 	}
 732 13b2bc37 2022-10-23 stsp 
 733 13b2bc37 2022-10-23 stsp 	return 0;
 734 13b2bc37 2022-10-23 stsp }
 735 13b2bc37 2022-10-23 stsp 
 736 13b2bc37 2022-10-23 stsp static const struct got_error *
 737 13b2bc37 2022-10-23 stsp recv_capabilities(struct gotd_client *client, struct imsg *imsg)
 738 13b2bc37 2022-10-23 stsp {
 739 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_capabilities icapas;
 740 13b2bc37 2022-10-23 stsp 	size_t datalen;
 741 13b2bc37 2022-10-23 stsp 
 742 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 743 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(icapas))
 744 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 745 13b2bc37 2022-10-23 stsp 	memcpy(&icapas, imsg->data, sizeof(icapas));
 746 13b2bc37 2022-10-23 stsp 
 747 13b2bc37 2022-10-23 stsp 	client->ncapa_alloc = icapas.ncapabilities;
 748 13b2bc37 2022-10-23 stsp 	client->capabilities = calloc(client->ncapa_alloc,
 749 13b2bc37 2022-10-23 stsp 	    sizeof(*client->capabilities));
 750 13b2bc37 2022-10-23 stsp 	if (client->capabilities == NULL) {
 751 13b2bc37 2022-10-23 stsp 		client->ncapa_alloc = 0;
 752 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("calloc");
 753 13b2bc37 2022-10-23 stsp 	}
 754 13b2bc37 2022-10-23 stsp 
 755 13b2bc37 2022-10-23 stsp 	log_debug("expecting %zu capabilities from uid %d",
 756 13b2bc37 2022-10-23 stsp 	    client->ncapa_alloc, client->euid);
 757 13b2bc37 2022-10-23 stsp 	return NULL;
 758 13b2bc37 2022-10-23 stsp }
 759 13b2bc37 2022-10-23 stsp 
 760 13b2bc37 2022-10-23 stsp static const struct got_error *
 761 13b2bc37 2022-10-23 stsp recv_capability(struct gotd_client *client, struct imsg *imsg)
 762 13b2bc37 2022-10-23 stsp {
 763 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_capability icapa;
 764 13b2bc37 2022-10-23 stsp 	struct gotd_client_capability *capa;
 765 13b2bc37 2022-10-23 stsp 	size_t datalen;
 766 13b2bc37 2022-10-23 stsp 	char *key, *value = NULL;
 767 13b2bc37 2022-10-23 stsp 
 768 13b2bc37 2022-10-23 stsp 	if (client->capabilities == NULL ||
 769 13b2bc37 2022-10-23 stsp 	    client->ncapabilities >= client->ncapa_alloc) {
 770 13b2bc37 2022-10-23 stsp 		return got_error_msg(GOT_ERR_BAD_REQUEST,
 771 13b2bc37 2022-10-23 stsp 		    "unexpected capability received");
 772 13b2bc37 2022-10-23 stsp 	}
 773 13b2bc37 2022-10-23 stsp 
 774 13b2bc37 2022-10-23 stsp 	memset(&icapa, 0, sizeof(icapa));
 775 13b2bc37 2022-10-23 stsp 
 776 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
 777 13b2bc37 2022-10-23 stsp 	if (datalen < sizeof(icapa))
 778 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 779 13b2bc37 2022-10-23 stsp 	memcpy(&icapa, imsg->data, sizeof(icapa));
 780 13b2bc37 2022-10-23 stsp 
 781 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(icapa) + icapa.key_len + icapa.value_len)
 782 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
 783 13b2bc37 2022-10-23 stsp 
 784 13b2bc37 2022-10-23 stsp 	key = malloc(icapa.key_len + 1);
 785 13b2bc37 2022-10-23 stsp 	if (key == NULL)
 786 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("malloc");
 787 13b2bc37 2022-10-23 stsp 	if (icapa.value_len > 0) {
 788 13b2bc37 2022-10-23 stsp 		value = malloc(icapa.value_len + 1);
 789 13b2bc37 2022-10-23 stsp 		if (value == NULL) {
 790 13b2bc37 2022-10-23 stsp 			free(key);
 791 13b2bc37 2022-10-23 stsp 			return got_error_from_errno("malloc");
 792 13b2bc37 2022-10-23 stsp 		}
 793 13b2bc37 2022-10-23 stsp 	}
 794 13b2bc37 2022-10-23 stsp 
 795 13b2bc37 2022-10-23 stsp 	memcpy(key, imsg->data + sizeof(icapa), icapa.key_len);
 796 13b2bc37 2022-10-23 stsp 	key[icapa.key_len] = '\0';
 797 13b2bc37 2022-10-23 stsp 	if (value) {
 798 13b2bc37 2022-10-23 stsp 		memcpy(value, imsg->data + sizeof(icapa) + icapa.key_len,
 799 13b2bc37 2022-10-23 stsp 		    icapa.value_len);
 800 13b2bc37 2022-10-23 stsp 		value[icapa.value_len] = '\0';
 801 13b2bc37 2022-10-23 stsp 	}
 802 13b2bc37 2022-10-23 stsp 
 803 13b2bc37 2022-10-23 stsp 	capa = &client->capabilities[client->ncapabilities++];
 804 13b2bc37 2022-10-23 stsp 	capa->key = key;
 805 13b2bc37 2022-10-23 stsp 	capa->value = value;
 806 13b2bc37 2022-10-23 stsp 
 807 13b2bc37 2022-10-23 stsp 	if (value)
 808 13b2bc37 2022-10-23 stsp 		log_debug("uid %d: capability %s=%s", client->euid, key, value);
 809 13b2bc37 2022-10-23 stsp 	else
 810 13b2bc37 2022-10-23 stsp 		log_debug("uid %d: capability %s", client->euid, key);
 811 13b2bc37 2022-10-23 stsp 
 812 13b2bc37 2022-10-23 stsp 	return NULL;
 813 13b2bc37 2022-10-23 stsp }
 814 13b2bc37 2022-10-23 stsp 
 815 13b2bc37 2022-10-23 stsp static const struct got_error *
 816 13b2bc37 2022-10-23 stsp send_packfile(struct gotd_client *client)
 817 13b2bc37 2022-10-23 stsp {
 818 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
 819 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_send_packfile ipack;
 820 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packfile_pipe ipipe;
 821 13b2bc37 2022-10-23 stsp 	int pipe[2];
 822 13b2bc37 2022-10-23 stsp 
 823 13b2bc37 2022-10-23 stsp 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
 824 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("socketpair");
 825 13b2bc37 2022-10-23 stsp 
 826 13b2bc37 2022-10-23 stsp 	memset(&ipack, 0, sizeof(ipack));
 827 13b2bc37 2022-10-23 stsp 	memset(&ipipe, 0, sizeof(ipipe));
 828 13b2bc37 2022-10-23 stsp 
 829 13b2bc37 2022-10-23 stsp 	ipack.client_id = client->id;
 830 13b2bc37 2022-10-23 stsp 	if (client_has_capability(client, GOT_CAPA_SIDE_BAND_64K))
 831 13b2bc37 2022-10-23 stsp 		ipack.report_progress = 1;
 832 13b2bc37 2022-10-23 stsp 
 833 13b2bc37 2022-10-23 stsp 	client->delta_cache_fd = got_opentempfd();
 834 13b2bc37 2022-10-23 stsp 	if (client->delta_cache_fd == -1)
 835 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("got_opentempfd");
 836 13b2bc37 2022-10-23 stsp 
 837 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(&client->repo_read->iev,
 838 13b2bc37 2022-10-23 stsp 	    GOTD_IMSG_SEND_PACKFILE, PROC_GOTD, client->delta_cache_fd,
 839 13b2bc37 2022-10-23 stsp 	    &ipack, sizeof(ipack)) == -1) {
 840 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg compose SEND_PACKFILE");
 841 13b2bc37 2022-10-23 stsp 		close(pipe[0]);
 842 13b2bc37 2022-10-23 stsp 		close(pipe[1]);
 843 13b2bc37 2022-10-23 stsp 		return err;
 844 13b2bc37 2022-10-23 stsp 	}
 845 13b2bc37 2022-10-23 stsp 
 846 13b2bc37 2022-10-23 stsp 	ipipe.client_id = client->id;
 847 13b2bc37 2022-10-23 stsp 
 848 86769de8 2022-10-28 stsp 	/* Send pack pipe end 0 to repo_read. */
 849 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(&client->repo_read->iev,
 850 13b2bc37 2022-10-23 stsp 	    GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[0],
 851 13b2bc37 2022-10-23 stsp 	        &ipipe, sizeof(ipipe)) == -1) {
 852 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg compose PACKFILE_PIPE");
 853 13b2bc37 2022-10-23 stsp 		close(pipe[1]);
 854 13b2bc37 2022-10-23 stsp 		return err;
 855 13b2bc37 2022-10-23 stsp 	}
 856 13b2bc37 2022-10-23 stsp 
 857 86769de8 2022-10-28 stsp 	/* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
 858 86769de8 2022-10-28 stsp 	if (gotd_imsg_compose_event(&client->iev,
 859 86769de8 2022-10-28 stsp 	    GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1], NULL, 0) == -1)
 860 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg compose PACKFILE_PIPE");
 861 13b2bc37 2022-10-23 stsp 
 862 13b2bc37 2022-10-23 stsp 	return err;
 863 13b2bc37 2022-10-23 stsp }
 864 13b2bc37 2022-10-23 stsp 
 865 13b2bc37 2022-10-23 stsp static const struct got_error *
 866 13b2bc37 2022-10-23 stsp recv_packfile(struct gotd_client *client)
 867 13b2bc37 2022-10-23 stsp {
 868 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
 869 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_recv_packfile ipack;
 870 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packfile_pipe ipipe;
 871 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packidx_file ifile;
 872 13b2bc37 2022-10-23 stsp 	char *basepath = NULL, *pack_path = NULL, *idx_path = NULL;
 873 13b2bc37 2022-10-23 stsp 	int packfd = -1, idxfd = -1;
 874 13b2bc37 2022-10-23 stsp 	int pipe[2] = { -1, -1 };
 875 13b2bc37 2022-10-23 stsp 
 876 13b2bc37 2022-10-23 stsp 	if (client->packfile_path) {
 877 13b2bc37 2022-10-23 stsp 		return got_error_fmt(GOT_ERR_PRIVSEP_MSG,
 878 13b2bc37 2022-10-23 stsp 		    "uid %d already has a pack file", client->euid);
 879 13b2bc37 2022-10-23 stsp 	}
 880 13b2bc37 2022-10-23 stsp 
 881 13b2bc37 2022-10-23 stsp 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe) == -1)
 882 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("socketpair");
 883 13b2bc37 2022-10-23 stsp 
 884 13b2bc37 2022-10-23 stsp 	memset(&ipipe, 0, sizeof(ipipe));
 885 13b2bc37 2022-10-23 stsp 	ipipe.client_id = client->id;
 886 13b2bc37 2022-10-23 stsp 
 887 7fec5f4a 2022-10-28 stsp 	/* Send pack pipe end 0 to repo_write. */
 888 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(&client->repo_write->iev,
 889 13b2bc37 2022-10-23 stsp 	    GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[0],
 890 13b2bc37 2022-10-23 stsp 	        &ipipe, sizeof(ipipe)) == -1) {
 891 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg compose PACKFILE_PIPE");
 892 13b2bc37 2022-10-23 stsp 		pipe[0] = -1;
 893 13b2bc37 2022-10-23 stsp 		goto done;
 894 13b2bc37 2022-10-23 stsp 	}
 895 13b2bc37 2022-10-23 stsp 	pipe[0] = -1;
 896 13b2bc37 2022-10-23 stsp 
 897 7fec5f4a 2022-10-28 stsp 	/* Send pack pipe end 1 to gotsh(1) (expects just an fd, no data). */
 898 7fec5f4a 2022-10-28 stsp 	if (gotd_imsg_compose_event(&client->iev,
 899 7fec5f4a 2022-10-28 stsp 	    GOTD_IMSG_PACKFILE_PIPE, PROC_GOTD, pipe[1], NULL, 0) == -1)
 900 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg compose PACKFILE_PIPE");
 901 13b2bc37 2022-10-23 stsp 	pipe[1] = -1;
 902 13b2bc37 2022-10-23 stsp 
 903 13b2bc37 2022-10-23 stsp 	if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.pack",
 904 eec68231 2022-12-14 stsp 	    client->repo_write->repo_path, GOT_OBJECTS_PACK_DIR,
 905 13b2bc37 2022-10-23 stsp 	    client->euid) == -1) {
 906 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("asprintf");
 907 13b2bc37 2022-10-23 stsp 		goto done;
 908 13b2bc37 2022-10-23 stsp 	}
 909 13b2bc37 2022-10-23 stsp 
 910 b90054ed 2022-11-01 stsp 	err = got_opentemp_named_fd(&pack_path, &packfd, basepath, "");
 911 13b2bc37 2022-10-23 stsp 	if (err)
 912 13b2bc37 2022-10-23 stsp 		goto done;
 913 13b2bc37 2022-10-23 stsp 
 914 13b2bc37 2022-10-23 stsp 	free(basepath);
 915 13b2bc37 2022-10-23 stsp 	if (asprintf(&basepath, "%s/%s/receiving-from-uid-%d.idx",
 916 eec68231 2022-12-14 stsp 	    client->repo_write->repo_path, GOT_OBJECTS_PACK_DIR,
 917 13b2bc37 2022-10-23 stsp 	    client->euid) == -1) {
 918 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("asprintf");
 919 13b2bc37 2022-10-23 stsp 		basepath = NULL;
 920 13b2bc37 2022-10-23 stsp 		goto done;
 921 13b2bc37 2022-10-23 stsp 	}
 922 b90054ed 2022-11-01 stsp 	err = got_opentemp_named_fd(&idx_path, &idxfd, basepath, "");
 923 13b2bc37 2022-10-23 stsp 	if (err)
 924 13b2bc37 2022-10-23 stsp 		goto done;
 925 13b2bc37 2022-10-23 stsp 
 926 13b2bc37 2022-10-23 stsp 	memset(&ifile, 0, sizeof(ifile));
 927 13b2bc37 2022-10-23 stsp 	ifile.client_id = client->id;
 928 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(&client->repo_write->iev,
 929 13b2bc37 2022-10-23 stsp 	    GOTD_IMSG_PACKIDX_FILE, PROC_GOTD, idxfd,
 930 13b2bc37 2022-10-23 stsp 	    &ifile, sizeof(ifile)) == -1) {
 931 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg compose PACKIDX_FILE");
 932 13b2bc37 2022-10-23 stsp 		idxfd = -1;
 933 13b2bc37 2022-10-23 stsp 		goto done;
 934 13b2bc37 2022-10-23 stsp 	}
 935 13b2bc37 2022-10-23 stsp 	idxfd = -1;
 936 13b2bc37 2022-10-23 stsp 
 937 13b2bc37 2022-10-23 stsp 	memset(&ipack, 0, sizeof(ipack));
 938 13b2bc37 2022-10-23 stsp 	ipack.client_id = client->id;
 939 13b2bc37 2022-10-23 stsp 	if (client_has_capability(client, GOT_CAPA_REPORT_STATUS))
 940 13b2bc37 2022-10-23 stsp 		ipack.report_status = 1;
 941 13b2bc37 2022-10-23 stsp 
 942 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(&client->repo_write->iev,
 943 13b2bc37 2022-10-23 stsp 	    GOTD_IMSG_RECV_PACKFILE, PROC_GOTD, packfd,
 944 13b2bc37 2022-10-23 stsp 	    &ipack, sizeof(ipack)) == -1) {
 945 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("imsg compose RECV_PACKFILE");
 946 13b2bc37 2022-10-23 stsp 		packfd = -1;
 947 13b2bc37 2022-10-23 stsp 		goto done;
 948 13b2bc37 2022-10-23 stsp 	}
 949 13b2bc37 2022-10-23 stsp 	packfd = -1;
 950 13b2bc37 2022-10-23 stsp 
 951 13b2bc37 2022-10-23 stsp done:
 952 13b2bc37 2022-10-23 stsp 	free(basepath);
 953 13b2bc37 2022-10-23 stsp 	if (pipe[0] != -1 && close(pipe[0]) == -1 && err == NULL)
 954 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("close");
 955 13b2bc37 2022-10-23 stsp 	if (pipe[1] != -1 && close(pipe[1]) == -1 && err == NULL)
 956 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("close");
 957 13b2bc37 2022-10-23 stsp 	if (packfd != -1 && close(packfd) == -1 && err == NULL)
 958 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("close");
 959 13b2bc37 2022-10-23 stsp 	if (idxfd != -1 && close(idxfd) == -1 && err == NULL)
 960 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("close");
 961 13b2bc37 2022-10-23 stsp 	if (err) {
 962 13b2bc37 2022-10-23 stsp 		free(pack_path);
 963 13b2bc37 2022-10-23 stsp 		free(idx_path);
 964 13b2bc37 2022-10-23 stsp 	} else {
 965 13b2bc37 2022-10-23 stsp 		client->packfile_path = pack_path;
 966 13b2bc37 2022-10-23 stsp 		client->packidx_path = idx_path;
 967 13b2bc37 2022-10-23 stsp 	}
 968 13b2bc37 2022-10-23 stsp 	return err;
 969 13b2bc37 2022-10-23 stsp }
 970 13b2bc37 2022-10-23 stsp 
 971 13b2bc37 2022-10-23 stsp static void
 972 13b2bc37 2022-10-23 stsp gotd_request(int fd, short events, void *arg)
 973 13b2bc37 2022-10-23 stsp {
 974 13b2bc37 2022-10-23 stsp 	struct gotd_imsgev *iev = arg;
 975 13b2bc37 2022-10-23 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
 976 13b2bc37 2022-10-23 stsp 	struct gotd_client *client = iev->handler_arg;
 977 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
 978 13b2bc37 2022-10-23 stsp 	struct imsg imsg;
 979 13b2bc37 2022-10-23 stsp 	ssize_t n;
 980 13b2bc37 2022-10-23 stsp 
 981 13b2bc37 2022-10-23 stsp 	if (events & EV_WRITE) {
 982 13b2bc37 2022-10-23 stsp 		while (ibuf->w.queued) {
 983 13b2bc37 2022-10-23 stsp 			n = msgbuf_write(&ibuf->w);
 984 13b2bc37 2022-10-23 stsp 			if (n == -1 && errno == EPIPE) {
 985 13b2bc37 2022-10-23 stsp 				/*
 986 13b2bc37 2022-10-23 stsp 				 * The client has closed its socket.
 987 13b2bc37 2022-10-23 stsp 				 * This can happen when Git clients are
 988 13b2bc37 2022-10-23 stsp 				 * done sending pack file data.
 989 77d0cae1 2022-12-30 op 				 */
 990 13b2bc37 2022-10-23 stsp 				msgbuf_clear(&ibuf->w);
 991 13b2bc37 2022-10-23 stsp 				continue;
 992 13b2bc37 2022-10-23 stsp 			} else if (n == -1 && errno != EAGAIN) {
 993 13b2bc37 2022-10-23 stsp 				err = got_error_from_errno("imsg_flush");
 994 13b2bc37 2022-10-23 stsp 				disconnect_on_error(client, err);
 995 13b2bc37 2022-10-23 stsp 				return;
 996 13b2bc37 2022-10-23 stsp 			}
 997 13b2bc37 2022-10-23 stsp 			if (n == 0) {
 998 13b2bc37 2022-10-23 stsp 				/* Connection closed. */
 999 13b2bc37 2022-10-23 stsp 				err = got_error(GOT_ERR_EOF);
1000 13b2bc37 2022-10-23 stsp 				disconnect_on_error(client, err);
1001 13b2bc37 2022-10-23 stsp 				return;
1002 13b2bc37 2022-10-23 stsp 			}
1003 13b2bc37 2022-10-23 stsp 		}
1004 f1752522 2022-10-29 stsp 
1005 f1752522 2022-10-29 stsp 		/* Disconnect gotctl(8) now that messages have been sent. */
1006 f1752522 2022-10-29 stsp 		if (!client_is_reading(client) && !client_is_writing(client)) {
1007 f1752522 2022-10-29 stsp 			disconnect(client);
1008 f1752522 2022-10-29 stsp 			return;
1009 f1752522 2022-10-29 stsp 		}
1010 13b2bc37 2022-10-23 stsp 	}
1011 13b2bc37 2022-10-23 stsp 
1012 13b2bc37 2022-10-23 stsp 	if ((events & EV_READ) == 0)
1013 13b2bc37 2022-10-23 stsp 		return;
1014 13b2bc37 2022-10-23 stsp 
1015 13b2bc37 2022-10-23 stsp 	memset(&imsg, 0, sizeof(imsg));
1016 13b2bc37 2022-10-23 stsp 
1017 13b2bc37 2022-10-23 stsp 	while (err == NULL) {
1018 13b2bc37 2022-10-23 stsp 		err = gotd_imsg_recv(&imsg, ibuf, 0);
1019 13b2bc37 2022-10-23 stsp 		if (err) {
1020 13b2bc37 2022-10-23 stsp 			if (err->code == GOT_ERR_PRIVSEP_READ)
1021 13b2bc37 2022-10-23 stsp 				err = NULL;
1022 13b2bc37 2022-10-23 stsp 			break;
1023 13b2bc37 2022-10-23 stsp 		}
1024 13b2bc37 2022-10-23 stsp 
1025 13b2bc37 2022-10-23 stsp 		evtimer_del(&client->tmo);
1026 13b2bc37 2022-10-23 stsp 
1027 13b2bc37 2022-10-23 stsp 		switch (imsg.hdr.type) {
1028 f1752522 2022-10-29 stsp 		case GOTD_IMSG_INFO:
1029 f1752522 2022-10-29 stsp 			err = send_info(client);
1030 f1752522 2022-10-29 stsp 			break;
1031 f1752522 2022-10-29 stsp 		case GOTD_IMSG_STOP:
1032 f1752522 2022-10-29 stsp 			err = stop_gotd(client);
1033 f1752522 2022-10-29 stsp 			break;
1034 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_LIST_REFS:
1035 13b2bc37 2022-10-23 stsp 			if (client->state != GOTD_STATE_EXPECT_LIST_REFS) {
1036 13b2bc37 2022-10-23 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1037 13b2bc37 2022-10-23 stsp 				    "unexpected list-refs request received");
1038 13b2bc37 2022-10-23 stsp 				break;
1039 13b2bc37 2022-10-23 stsp 			}
1040 b50a2b46 2022-12-29 stsp 			err = start_client_session(client, &imsg);
1041 13b2bc37 2022-10-23 stsp 			if (err)
1042 13b2bc37 2022-10-23 stsp 				break;
1043 13b2bc37 2022-10-23 stsp 			break;
1044 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_CAPABILITIES:
1045 13b2bc37 2022-10-23 stsp 			if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1046 13b2bc37 2022-10-23 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1047 13b2bc37 2022-10-23 stsp 				    "unexpected capabilities received");
1048 13b2bc37 2022-10-23 stsp 				break;
1049 13b2bc37 2022-10-23 stsp 			}
1050 13b2bc37 2022-10-23 stsp 			log_debug("receiving capabilities from uid %d",
1051 13b2bc37 2022-10-23 stsp 			    client->euid);
1052 13b2bc37 2022-10-23 stsp 			err = recv_capabilities(client, &imsg);
1053 13b2bc37 2022-10-23 stsp 			break;
1054 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_CAPABILITY:
1055 13b2bc37 2022-10-23 stsp 			if (client->state != GOTD_STATE_EXPECT_CAPABILITIES) {
1056 13b2bc37 2022-10-23 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1057 13b2bc37 2022-10-23 stsp 				    "unexpected capability received");
1058 13b2bc37 2022-10-23 stsp 				break;
1059 13b2bc37 2022-10-23 stsp 			}
1060 13b2bc37 2022-10-23 stsp 			err = recv_capability(client, &imsg);
1061 13b2bc37 2022-10-23 stsp 			if (err || client->ncapabilities < client->ncapa_alloc)
1062 13b2bc37 2022-10-23 stsp 				break;
1063 13b2bc37 2022-10-23 stsp 			if (client_is_reading(client)) {
1064 13b2bc37 2022-10-23 stsp 				client->state = GOTD_STATE_EXPECT_WANT;
1065 13b2bc37 2022-10-23 stsp 				log_debug("uid %d: expecting want-lines",
1066 13b2bc37 2022-10-23 stsp 				    client->euid);
1067 13b2bc37 2022-10-23 stsp 			} else if (client_is_writing(client)) {
1068 13b2bc37 2022-10-23 stsp 				client->state = GOTD_STATE_EXPECT_REF_UPDATE;
1069 13b2bc37 2022-10-23 stsp 				log_debug("uid %d: expecting ref-update-lines",
1070 13b2bc37 2022-10-23 stsp 				    client->euid);
1071 13b2bc37 2022-10-23 stsp 			} else
1072 13b2bc37 2022-10-23 stsp 				fatalx("client %d is both reading and writing",
1073 13b2bc37 2022-10-23 stsp 				    client->euid);
1074 13b2bc37 2022-10-23 stsp 			break;
1075 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_WANT:
1076 13b2bc37 2022-10-23 stsp 			if (client->state != GOTD_STATE_EXPECT_WANT) {
1077 13b2bc37 2022-10-23 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1078 13b2bc37 2022-10-23 stsp 				    "unexpected want-line received");
1079 13b2bc37 2022-10-23 stsp 				break;
1080 13b2bc37 2022-10-23 stsp 			}
1081 13b2bc37 2022-10-23 stsp 			log_debug("received want-line from uid %d",
1082 13b2bc37 2022-10-23 stsp 			    client->euid);
1083 13b2bc37 2022-10-23 stsp 			err = ensure_client_is_reading(client);
1084 13b2bc37 2022-10-23 stsp 			if (err)
1085 13b2bc37 2022-10-23 stsp 				break;
1086 13b2bc37 2022-10-23 stsp 			err = forward_want(client, &imsg);
1087 13b2bc37 2022-10-23 stsp 			break;
1088 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_REF_UPDATE:
1089 13b2bc37 2022-10-23 stsp 			if (client->state != GOTD_STATE_EXPECT_REF_UPDATE) {
1090 13b2bc37 2022-10-23 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1091 13b2bc37 2022-10-23 stsp 				    "unexpected ref-update-line received");
1092 13b2bc37 2022-10-23 stsp 				break;
1093 13b2bc37 2022-10-23 stsp 			}
1094 13b2bc37 2022-10-23 stsp 			log_debug("received ref-update-line from uid %d",
1095 13b2bc37 2022-10-23 stsp 			    client->euid);
1096 13b2bc37 2022-10-23 stsp 			err = ensure_client_is_writing(client);
1097 13b2bc37 2022-10-23 stsp 			if (err)
1098 13b2bc37 2022-10-23 stsp 				break;
1099 13b2bc37 2022-10-23 stsp 			err = forward_ref_update(client, &imsg);
1100 13b2bc37 2022-10-23 stsp 			if (err)
1101 13b2bc37 2022-10-23 stsp 				break;
1102 13b2bc37 2022-10-23 stsp 			client->state = GOTD_STATE_EXPECT_MORE_REF_UPDATES;
1103 13b2bc37 2022-10-23 stsp 			break;
1104 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_HAVE:
1105 13b2bc37 2022-10-23 stsp 			if (client->state != GOTD_STATE_EXPECT_HAVE) {
1106 13b2bc37 2022-10-23 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1107 13b2bc37 2022-10-23 stsp 				    "unexpected have-line received");
1108 13b2bc37 2022-10-23 stsp 				break;
1109 13b2bc37 2022-10-23 stsp 			}
1110 13b2bc37 2022-10-23 stsp 			log_debug("received have-line from uid %d",
1111 13b2bc37 2022-10-23 stsp 			    client->euid);
1112 13b2bc37 2022-10-23 stsp 			err = ensure_client_is_reading(client);
1113 13b2bc37 2022-10-23 stsp 			if (err)
1114 13b2bc37 2022-10-23 stsp 				break;
1115 13b2bc37 2022-10-23 stsp 			err = forward_have(client, &imsg);
1116 13b2bc37 2022-10-23 stsp 			if (err)
1117 13b2bc37 2022-10-23 stsp 				break;
1118 13b2bc37 2022-10-23 stsp 			break;
1119 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_FLUSH:
1120 13b2bc37 2022-10-23 stsp 			if (client->state == GOTD_STATE_EXPECT_WANT ||
1121 13b2bc37 2022-10-23 stsp 			    client->state == GOTD_STATE_EXPECT_HAVE) {
1122 13b2bc37 2022-10-23 stsp 				err = ensure_client_is_reading(client);
1123 13b2bc37 2022-10-23 stsp 				if (err)
1124 13b2bc37 2022-10-23 stsp 					break;
1125 13b2bc37 2022-10-23 stsp 			} else if (client->state ==
1126 13b2bc37 2022-10-23 stsp 			    GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1127 13b2bc37 2022-10-23 stsp 				err = ensure_client_is_writing(client);
1128 13b2bc37 2022-10-23 stsp 				if (err)
1129 13b2bc37 2022-10-23 stsp 					break;
1130 13b2bc37 2022-10-23 stsp 			} else {
1131 13b2bc37 2022-10-23 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1132 13b2bc37 2022-10-23 stsp 				    "unexpected flush-pkt received");
1133 13b2bc37 2022-10-23 stsp 				break;
1134 13b2bc37 2022-10-23 stsp 			}
1135 13b2bc37 2022-10-23 stsp 			log_debug("received flush-pkt from uid %d",
1136 13b2bc37 2022-10-23 stsp 			    client->euid);
1137 13b2bc37 2022-10-23 stsp 			if (client->state == GOTD_STATE_EXPECT_WANT) {
1138 13b2bc37 2022-10-23 stsp 				client->state = GOTD_STATE_EXPECT_HAVE;
1139 13b2bc37 2022-10-23 stsp 				log_debug("uid %d: expecting have-lines",
1140 13b2bc37 2022-10-23 stsp 				    client->euid);
1141 13b2bc37 2022-10-23 stsp 			} else if (client->state == GOTD_STATE_EXPECT_HAVE) {
1142 13b2bc37 2022-10-23 stsp 				client->state = GOTD_STATE_EXPECT_DONE;
1143 13b2bc37 2022-10-23 stsp 				log_debug("uid %d: expecting 'done'",
1144 13b2bc37 2022-10-23 stsp 				    client->euid);
1145 13b2bc37 2022-10-23 stsp 			} else if (client->state ==
1146 13b2bc37 2022-10-23 stsp 			    GOTD_STATE_EXPECT_MORE_REF_UPDATES) {
1147 13b2bc37 2022-10-23 stsp 				client->state = GOTD_STATE_EXPECT_PACKFILE;
1148 13b2bc37 2022-10-23 stsp 				log_debug("uid %d: expecting packfile",
1149 13b2bc37 2022-10-23 stsp 				    client->euid);
1150 13b2bc37 2022-10-23 stsp 				err = recv_packfile(client);
1151 13b2bc37 2022-10-23 stsp 			} else {
1152 13b2bc37 2022-10-23 stsp 				/* should not happen, see above */
1153 13b2bc37 2022-10-23 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1154 13b2bc37 2022-10-23 stsp 				    "unexpected client state");
1155 13b2bc37 2022-10-23 stsp 				break;
1156 13b2bc37 2022-10-23 stsp 			}
1157 13b2bc37 2022-10-23 stsp 			break;
1158 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_DONE:
1159 13b2bc37 2022-10-23 stsp 			if (client->state != GOTD_STATE_EXPECT_HAVE &&
1160 13b2bc37 2022-10-23 stsp 			    client->state != GOTD_STATE_EXPECT_DONE) {
1161 13b2bc37 2022-10-23 stsp 				err = got_error_msg(GOT_ERR_BAD_REQUEST,
1162 13b2bc37 2022-10-23 stsp 				    "unexpected flush-pkt received");
1163 13b2bc37 2022-10-23 stsp 				break;
1164 13b2bc37 2022-10-23 stsp 			}
1165 13b2bc37 2022-10-23 stsp 			log_debug("received 'done' from uid %d", client->euid);
1166 13b2bc37 2022-10-23 stsp 			err = ensure_client_is_reading(client);
1167 13b2bc37 2022-10-23 stsp 			if (err)
1168 13b2bc37 2022-10-23 stsp 				break;
1169 13b2bc37 2022-10-23 stsp 			client->state = GOTD_STATE_DONE;
1170 13b2bc37 2022-10-23 stsp 			err = send_packfile(client);
1171 13b2bc37 2022-10-23 stsp 			break;
1172 13b2bc37 2022-10-23 stsp 		default:
1173 13b2bc37 2022-10-23 stsp 			err = got_error(GOT_ERR_PRIVSEP_MSG);
1174 13b2bc37 2022-10-23 stsp 			break;
1175 13b2bc37 2022-10-23 stsp 		}
1176 13b2bc37 2022-10-23 stsp 
1177 13b2bc37 2022-10-23 stsp 		imsg_free(&imsg);
1178 13b2bc37 2022-10-23 stsp 	}
1179 13b2bc37 2022-10-23 stsp 
1180 13b2bc37 2022-10-23 stsp 	if (err) {
1181 13b2bc37 2022-10-23 stsp 		if (err->code != GOT_ERR_EOF ||
1182 13b2bc37 2022-10-23 stsp 		    client->state != GOTD_STATE_EXPECT_PACKFILE)
1183 13b2bc37 2022-10-23 stsp 			disconnect_on_error(client, err);
1184 13b2bc37 2022-10-23 stsp 	} else {
1185 13b2bc37 2022-10-23 stsp 		gotd_imsg_event_add(&client->iev);
1186 ef4e2f01 2022-12-29 stsp 		if (client->state == GOTD_STATE_EXPECT_LIST_REFS)
1187 ef4e2f01 2022-12-29 stsp 			evtimer_add(&client->tmo, &auth_timeout);
1188 ef4e2f01 2022-12-29 stsp 		else
1189 40b85cca 2023-01-03 stsp 			evtimer_add(&client->tmo, &gotd.request_timeout);
1190 13b2bc37 2022-10-23 stsp 	}
1191 13b2bc37 2022-10-23 stsp }
1192 13b2bc37 2022-10-23 stsp 
1193 13b2bc37 2022-10-23 stsp static void
1194 13b2bc37 2022-10-23 stsp gotd_request_timeout(int fd, short events, void *arg)
1195 13b2bc37 2022-10-23 stsp {
1196 13b2bc37 2022-10-23 stsp 	struct gotd_client *client = arg;
1197 13b2bc37 2022-10-23 stsp 
1198 13b2bc37 2022-10-23 stsp 	log_debug("disconnecting uid %d due to timeout", client->euid);
1199 13b2bc37 2022-10-23 stsp 	disconnect(client);
1200 13b2bc37 2022-10-23 stsp }
1201 13b2bc37 2022-10-23 stsp 
1202 d93ecf7d 2022-12-14 stsp static const struct got_error *
1203 d93ecf7d 2022-12-14 stsp recv_connect(uint32_t *client_id, struct imsg *imsg)
1204 13b2bc37 2022-10-23 stsp {
1205 d93ecf7d 2022-12-14 stsp 	const struct got_error *err = NULL;
1206 d93ecf7d 2022-12-14 stsp 	struct gotd_imsg_connect iconnect;
1207 d93ecf7d 2022-12-14 stsp 	size_t datalen;
1208 13b2bc37 2022-10-23 stsp 	int s = -1;
1209 13b2bc37 2022-10-23 stsp 	struct gotd_client *client = NULL;
1210 13b2bc37 2022-10-23 stsp 
1211 d93ecf7d 2022-12-14 stsp 	*client_id = 0;
1212 13b2bc37 2022-10-23 stsp 
1213 d93ecf7d 2022-12-14 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1214 d93ecf7d 2022-12-14 stsp 	if (datalen != sizeof(iconnect))
1215 d93ecf7d 2022-12-14 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1216 d93ecf7d 2022-12-14 stsp 	memcpy(&iconnect, imsg->data, sizeof(iconnect));
1217 13b2bc37 2022-10-23 stsp 
1218 d93ecf7d 2022-12-14 stsp 	s = imsg->fd;
1219 13b2bc37 2022-10-23 stsp 	if (s == -1) {
1220 d93ecf7d 2022-12-14 stsp 		err = got_error(GOT_ERR_PRIVSEP_NO_FD);
1221 d93ecf7d 2022-12-14 stsp 		goto done;
1222 13b2bc37 2022-10-23 stsp 	}
1223 13b2bc37 2022-10-23 stsp 
1224 d93ecf7d 2022-12-14 stsp 	if (find_client(iconnect.client_id)) {
1225 d93ecf7d 2022-12-14 stsp 		err = got_error_msg(GOT_ERR_CLIENT_ID, "duplicate client ID");
1226 d93ecf7d 2022-12-14 stsp 		goto done;
1227 d93ecf7d 2022-12-14 stsp 	}
1228 13b2bc37 2022-10-23 stsp 
1229 13b2bc37 2022-10-23 stsp 	client = calloc(1, sizeof(*client));
1230 13b2bc37 2022-10-23 stsp 	if (client == NULL) {
1231 d93ecf7d 2022-12-14 stsp 		err = got_error_from_errno("calloc");
1232 d93ecf7d 2022-12-14 stsp 		goto done;
1233 13b2bc37 2022-10-23 stsp 	}
1234 13b2bc37 2022-10-23 stsp 
1235 d93ecf7d 2022-12-14 stsp 	*client_id = iconnect.client_id;
1236 d93ecf7d 2022-12-14 stsp 
1237 13b2bc37 2022-10-23 stsp 	client->state = GOTD_STATE_EXPECT_LIST_REFS;
1238 d93ecf7d 2022-12-14 stsp 	client->id = iconnect.client_id;
1239 13b2bc37 2022-10-23 stsp 	client->fd = s;
1240 13b2bc37 2022-10-23 stsp 	s = -1;
1241 13b2bc37 2022-10-23 stsp 	client->delta_cache_fd = -1;
1242 365cf0f3 2022-12-29 stsp 	/* The auth process will verify UID/GID for us. */
1243 365cf0f3 2022-12-29 stsp 	client->euid = iconnect.euid;
1244 365cf0f3 2022-12-29 stsp 	client->egid = iconnect.egid;
1245 13b2bc37 2022-10-23 stsp 	client->nref_updates = -1;
1246 13b2bc37 2022-10-23 stsp 
1247 13b2bc37 2022-10-23 stsp 	imsg_init(&client->iev.ibuf, client->fd);
1248 13b2bc37 2022-10-23 stsp 	client->iev.handler = gotd_request;
1249 13b2bc37 2022-10-23 stsp 	client->iev.events = EV_READ;
1250 13b2bc37 2022-10-23 stsp 	client->iev.handler_arg = client;
1251 13b2bc37 2022-10-23 stsp 
1252 13b2bc37 2022-10-23 stsp 	event_set(&client->iev.ev, client->fd, EV_READ, gotd_request,
1253 13b2bc37 2022-10-23 stsp 	    &client->iev);
1254 13b2bc37 2022-10-23 stsp 	gotd_imsg_event_add(&client->iev);
1255 13b2bc37 2022-10-23 stsp 
1256 13b2bc37 2022-10-23 stsp 	evtimer_set(&client->tmo, gotd_request_timeout, client);
1257 13b2bc37 2022-10-23 stsp 
1258 13b2bc37 2022-10-23 stsp 	add_client(client);
1259 13b2bc37 2022-10-23 stsp 	log_debug("%s: new client uid %d connected on fd %d", __func__,
1260 13b2bc37 2022-10-23 stsp 	    client->euid, client->fd);
1261 d93ecf7d 2022-12-14 stsp done:
1262 d93ecf7d 2022-12-14 stsp 	if (err) {
1263 b50a2b46 2022-12-29 stsp 		struct gotd_child_proc *listen_proc = &gotd.listen_proc;
1264 d93ecf7d 2022-12-14 stsp 		struct gotd_imsg_disconnect idisconnect;
1265 13b2bc37 2022-10-23 stsp 
1266 d93ecf7d 2022-12-14 stsp 		idisconnect.client_id = client->id;
1267 d93ecf7d 2022-12-14 stsp 		if (gotd_imsg_compose_event(&listen_proc->iev,
1268 d93ecf7d 2022-12-14 stsp 		    GOTD_IMSG_DISCONNECT, PROC_GOTD, -1,
1269 d93ecf7d 2022-12-14 stsp 		    &idisconnect, sizeof(idisconnect)) == -1)
1270 d93ecf7d 2022-12-14 stsp 			log_warn("imsg compose DISCONNECT");
1271 d93ecf7d 2022-12-14 stsp 
1272 d93ecf7d 2022-12-14 stsp 		if (s != -1)
1273 d93ecf7d 2022-12-14 stsp 			close(s);
1274 d93ecf7d 2022-12-14 stsp 	}
1275 d93ecf7d 2022-12-14 stsp 
1276 d93ecf7d 2022-12-14 stsp 	return err;
1277 13b2bc37 2022-10-23 stsp }
1278 13b2bc37 2022-10-23 stsp 
1279 13b2bc37 2022-10-23 stsp static const char *gotd_proc_names[PROC_MAX] = {
1280 13b2bc37 2022-10-23 stsp 	"parent",
1281 d93ecf7d 2022-12-14 stsp 	"listen",
1282 5e25db14 2022-12-29 stsp 	"auth",
1283 13b2bc37 2022-10-23 stsp 	"repo_read",
1284 13b2bc37 2022-10-23 stsp 	"repo_write"
1285 13b2bc37 2022-10-23 stsp };
1286 13b2bc37 2022-10-23 stsp 
1287 13b2bc37 2022-10-23 stsp static void
1288 13b2bc37 2022-10-23 stsp kill_proc(struct gotd_child_proc *proc, int fatal)
1289 13b2bc37 2022-10-23 stsp {
1290 13b2bc37 2022-10-23 stsp 	if (fatal) {
1291 13b2bc37 2022-10-23 stsp 		log_warnx("sending SIGKILL to PID %d", proc->pid);
1292 13b2bc37 2022-10-23 stsp 		kill(proc->pid, SIGKILL);
1293 13b2bc37 2022-10-23 stsp 	} else
1294 13b2bc37 2022-10-23 stsp 		kill(proc->pid, SIGTERM);
1295 13b2bc37 2022-10-23 stsp }
1296 13b2bc37 2022-10-23 stsp 
1297 13b2bc37 2022-10-23 stsp static void
1298 13b2bc37 2022-10-23 stsp gotd_shutdown(void)
1299 13b2bc37 2022-10-23 stsp {
1300 13b2bc37 2022-10-23 stsp 	struct gotd_child_proc *proc;
1301 b50a2b46 2022-12-29 stsp 	uint64_t slot;
1302 13b2bc37 2022-10-23 stsp 
1303 b50a2b46 2022-12-29 stsp 	for (slot = 0; slot < nitems(gotd_clients); slot++) {
1304 b50a2b46 2022-12-29 stsp 		struct gotd_client *c, *tmp;
1305 b50a2b46 2022-12-29 stsp 
1306 b50a2b46 2022-12-29 stsp 		STAILQ_FOREACH_SAFE(c, &gotd_clients[slot], entry, tmp)
1307 b50a2b46 2022-12-29 stsp 			disconnect(c);
1308 13b2bc37 2022-10-23 stsp 	}
1309 13b2bc37 2022-10-23 stsp 
1310 b50a2b46 2022-12-29 stsp 	proc = &gotd.listen_proc;
1311 b50a2b46 2022-12-29 stsp 	msgbuf_clear(&proc->iev.ibuf.w);
1312 b50a2b46 2022-12-29 stsp 	close(proc->iev.ibuf.fd);
1313 b50a2b46 2022-12-29 stsp 	kill_proc(proc, 0);
1314 5e25db14 2022-12-29 stsp 	wait_for_child(proc->pid);
1315 13b2bc37 2022-10-23 stsp 
1316 13b2bc37 2022-10-23 stsp 	log_info("terminating");
1317 13b2bc37 2022-10-23 stsp 	exit(0);
1318 13b2bc37 2022-10-23 stsp }
1319 13b2bc37 2022-10-23 stsp 
1320 13b2bc37 2022-10-23 stsp void
1321 13b2bc37 2022-10-23 stsp gotd_sighdlr(int sig, short event, void *arg)
1322 13b2bc37 2022-10-23 stsp {
1323 13b2bc37 2022-10-23 stsp 	/*
1324 13b2bc37 2022-10-23 stsp 	 * Normal signal handler rules don't apply because libevent
1325 13b2bc37 2022-10-23 stsp 	 * decouples for us.
1326 13b2bc37 2022-10-23 stsp 	 */
1327 13b2bc37 2022-10-23 stsp 
1328 13b2bc37 2022-10-23 stsp 	switch (sig) {
1329 13b2bc37 2022-10-23 stsp 	case SIGHUP:
1330 13b2bc37 2022-10-23 stsp 		log_info("%s: ignoring SIGHUP", __func__);
1331 13b2bc37 2022-10-23 stsp 		break;
1332 13b2bc37 2022-10-23 stsp 	case SIGUSR1:
1333 13b2bc37 2022-10-23 stsp 		log_info("%s: ignoring SIGUSR1", __func__);
1334 13b2bc37 2022-10-23 stsp 		break;
1335 13b2bc37 2022-10-23 stsp 	case SIGTERM:
1336 13b2bc37 2022-10-23 stsp 	case SIGINT:
1337 13b2bc37 2022-10-23 stsp 		gotd_shutdown();
1338 13b2bc37 2022-10-23 stsp 		log_warnx("gotd terminating");
1339 13b2bc37 2022-10-23 stsp 		exit(0);
1340 13b2bc37 2022-10-23 stsp 		break;
1341 13b2bc37 2022-10-23 stsp 	default:
1342 13b2bc37 2022-10-23 stsp 		fatalx("unexpected signal");
1343 13b2bc37 2022-10-23 stsp 	}
1344 13b2bc37 2022-10-23 stsp }
1345 13b2bc37 2022-10-23 stsp 
1346 13b2bc37 2022-10-23 stsp static const struct got_error *
1347 13b2bc37 2022-10-23 stsp ensure_proc_is_reading(struct gotd_client *client,
1348 13b2bc37 2022-10-23 stsp     struct gotd_child_proc *proc)
1349 13b2bc37 2022-10-23 stsp {
1350 13b2bc37 2022-10-23 stsp 	if (!client_is_reading(client)) {
1351 13b2bc37 2022-10-23 stsp 		kill_proc(proc, 1);
1352 13b2bc37 2022-10-23 stsp 		return got_error_fmt(GOT_ERR_BAD_PACKET,
1353 13b2bc37 2022-10-23 stsp 		    "PID %d handled a read-request for uid %d but this "
1354 13b2bc37 2022-10-23 stsp 		    "user is not reading from a repository", proc->pid,
1355 13b2bc37 2022-10-23 stsp 		    client->euid);
1356 13b2bc37 2022-10-23 stsp 	}
1357 13b2bc37 2022-10-23 stsp 
1358 13b2bc37 2022-10-23 stsp 	return NULL;
1359 13b2bc37 2022-10-23 stsp }
1360 13b2bc37 2022-10-23 stsp 
1361 13b2bc37 2022-10-23 stsp static const struct got_error *
1362 13b2bc37 2022-10-23 stsp ensure_proc_is_writing(struct gotd_client *client,
1363 13b2bc37 2022-10-23 stsp     struct gotd_child_proc *proc)
1364 13b2bc37 2022-10-23 stsp {
1365 13b2bc37 2022-10-23 stsp 	if (!client_is_writing(client)) {
1366 13b2bc37 2022-10-23 stsp 		kill_proc(proc, 1);
1367 13b2bc37 2022-10-23 stsp 		return got_error_fmt(GOT_ERR_BAD_PACKET,
1368 13b2bc37 2022-10-23 stsp 		    "PID %d handled a write-request for uid %d but this "
1369 13b2bc37 2022-10-23 stsp 		    "user is not writing to a repository", proc->pid,
1370 13b2bc37 2022-10-23 stsp 		    client->euid);
1371 13b2bc37 2022-10-23 stsp 	}
1372 13b2bc37 2022-10-23 stsp 
1373 13b2bc37 2022-10-23 stsp 	return NULL;
1374 13b2bc37 2022-10-23 stsp }
1375 13b2bc37 2022-10-23 stsp 
1376 13b2bc37 2022-10-23 stsp static int
1377 13b2bc37 2022-10-23 stsp verify_imsg_src(struct gotd_client *client, struct gotd_child_proc *proc,
1378 13b2bc37 2022-10-23 stsp     struct imsg *imsg)
1379 13b2bc37 2022-10-23 stsp {
1380 13b2bc37 2022-10-23 stsp 	const struct got_error *err;
1381 13b2bc37 2022-10-23 stsp 	struct gotd_child_proc *client_proc;
1382 13b2bc37 2022-10-23 stsp 	int ret = 0;
1383 13b2bc37 2022-10-23 stsp 
1384 d93ecf7d 2022-12-14 stsp 	if (proc->type == PROC_REPO_READ || proc->type == PROC_REPO_WRITE) {
1385 d93ecf7d 2022-12-14 stsp 		client_proc = get_client_proc(client);
1386 d93ecf7d 2022-12-14 stsp 		if (client_proc == NULL)
1387 d93ecf7d 2022-12-14 stsp 			fatalx("no process found for uid %d", client->euid);
1388 d93ecf7d 2022-12-14 stsp 		if (proc->pid != client_proc->pid) {
1389 d93ecf7d 2022-12-14 stsp 			kill_proc(proc, 1);
1390 d93ecf7d 2022-12-14 stsp 			log_warnx("received message from PID %d for uid %d, "
1391 d93ecf7d 2022-12-14 stsp 			    "while PID %d is the process serving this user",
1392 d93ecf7d 2022-12-14 stsp 			    proc->pid, client->euid, client_proc->pid);
1393 d93ecf7d 2022-12-14 stsp 			return 0;
1394 d93ecf7d 2022-12-14 stsp 		}
1395 13b2bc37 2022-10-23 stsp 	}
1396 13b2bc37 2022-10-23 stsp 
1397 13b2bc37 2022-10-23 stsp 	switch (imsg->hdr.type) {
1398 13b2bc37 2022-10-23 stsp 	case GOTD_IMSG_ERROR:
1399 13b2bc37 2022-10-23 stsp 		ret = 1;
1400 13b2bc37 2022-10-23 stsp 		break;
1401 d93ecf7d 2022-12-14 stsp 	case GOTD_IMSG_CONNECT:
1402 d93ecf7d 2022-12-14 stsp 		if (proc->type != PROC_LISTEN) {
1403 d93ecf7d 2022-12-14 stsp 			err = got_error_fmt(GOT_ERR_BAD_PACKET,
1404 d93ecf7d 2022-12-14 stsp 			    "new connection for uid %d from PID %d "
1405 d93ecf7d 2022-12-14 stsp 			    "which is not the listen process",
1406 5e25db14 2022-12-29 stsp 			    proc->pid, client->euid);
1407 5e25db14 2022-12-29 stsp 		} else
1408 5e25db14 2022-12-29 stsp 			ret = 1;
1409 5e25db14 2022-12-29 stsp 		break;
1410 5e25db14 2022-12-29 stsp 	case GOTD_IMSG_ACCESS_GRANTED:
1411 5e25db14 2022-12-29 stsp 		if (proc->type != PROC_AUTH) {
1412 5e25db14 2022-12-29 stsp 			err = got_error_fmt(GOT_ERR_BAD_PACKET,
1413 5e25db14 2022-12-29 stsp 			    "authentication of uid %d from PID %d "
1414 5e25db14 2022-12-29 stsp 			    "which is not the auth process",
1415 d93ecf7d 2022-12-14 stsp 			    proc->pid, client->euid);
1416 d93ecf7d 2022-12-14 stsp 		} else
1417 d93ecf7d 2022-12-14 stsp 			ret = 1;
1418 d93ecf7d 2022-12-14 stsp 		break;
1419 b50a2b46 2022-12-29 stsp 	case GOTD_IMSG_REPO_CHILD_READY:
1420 b50a2b46 2022-12-29 stsp 		if (proc->type != PROC_REPO_READ &&
1421 b50a2b46 2022-12-29 stsp 		    proc->type != PROC_REPO_WRITE) {
1422 b50a2b46 2022-12-29 stsp 			err = got_error_fmt(GOT_ERR_BAD_PACKET,
1423 b50a2b46 2022-12-29 stsp 			    "unexpected \"ready\" signal from PID %d",
1424 b50a2b46 2022-12-29 stsp 			    proc->pid);
1425 b50a2b46 2022-12-29 stsp 		} else
1426 b50a2b46 2022-12-29 stsp 			ret = 1;
1427 b50a2b46 2022-12-29 stsp 		break;
1428 13b2bc37 2022-10-23 stsp 	case GOTD_IMSG_PACKFILE_DONE:
1429 13b2bc37 2022-10-23 stsp 		err = ensure_proc_is_reading(client, proc);
1430 13b2bc37 2022-10-23 stsp 		if (err)
1431 13b2bc37 2022-10-23 stsp 			log_warnx("uid %d: %s", client->euid, err->msg);
1432 13b2bc37 2022-10-23 stsp 		else
1433 13b2bc37 2022-10-23 stsp 			ret = 1;
1434 13b2bc37 2022-10-23 stsp 		break;
1435 13b2bc37 2022-10-23 stsp 	case GOTD_IMSG_PACKFILE_INSTALL:
1436 13b2bc37 2022-10-23 stsp 	case GOTD_IMSG_REF_UPDATES_START:
1437 13b2bc37 2022-10-23 stsp 	case GOTD_IMSG_REF_UPDATE:
1438 13b2bc37 2022-10-23 stsp 		err = ensure_proc_is_writing(client, proc);
1439 13b2bc37 2022-10-23 stsp 		if (err)
1440 13b2bc37 2022-10-23 stsp 			log_warnx("uid %d: %s", client->euid, err->msg);
1441 13b2bc37 2022-10-23 stsp 		else
1442 13b2bc37 2022-10-23 stsp 			ret = 1;
1443 13b2bc37 2022-10-23 stsp 		break;
1444 13b2bc37 2022-10-23 stsp 	default:
1445 13b2bc37 2022-10-23 stsp 		log_debug("%s: unexpected imsg %d", __func__, imsg->hdr.type);
1446 13b2bc37 2022-10-23 stsp 		break;
1447 13b2bc37 2022-10-23 stsp 	}
1448 13b2bc37 2022-10-23 stsp 
1449 13b2bc37 2022-10-23 stsp 	return ret;
1450 13b2bc37 2022-10-23 stsp }
1451 13b2bc37 2022-10-23 stsp 
1452 13b2bc37 2022-10-23 stsp static const struct got_error *
1453 b50a2b46 2022-12-29 stsp list_refs_request(struct gotd_client *client, struct gotd_imsgev *iev)
1454 b50a2b46 2022-12-29 stsp {
1455 b50a2b46 2022-12-29 stsp 	static const struct got_error *err;
1456 b50a2b46 2022-12-29 stsp 	struct gotd_imsg_list_refs_internal ilref;
1457 b50a2b46 2022-12-29 stsp 	int fd;
1458 b50a2b46 2022-12-29 stsp 
1459 b50a2b46 2022-12-29 stsp 	memset(&ilref, 0, sizeof(ilref));
1460 b50a2b46 2022-12-29 stsp 	ilref.client_id = client->id;
1461 b50a2b46 2022-12-29 stsp 
1462 b50a2b46 2022-12-29 stsp 	fd = dup(client->fd);
1463 b50a2b46 2022-12-29 stsp 	if (fd == -1)
1464 b50a2b46 2022-12-29 stsp 		return got_error_from_errno("dup");
1465 b50a2b46 2022-12-29 stsp 
1466 b50a2b46 2022-12-29 stsp 	if (gotd_imsg_compose_event(iev, GOTD_IMSG_LIST_REFS_INTERNAL,
1467 b50a2b46 2022-12-29 stsp 	    PROC_GOTD, fd, &ilref, sizeof(ilref)) == -1) {
1468 b50a2b46 2022-12-29 stsp 		err = got_error_from_errno("imsg compose WANT");
1469 b50a2b46 2022-12-29 stsp 		close(fd);
1470 b50a2b46 2022-12-29 stsp 		return err;
1471 b50a2b46 2022-12-29 stsp 	}
1472 b50a2b46 2022-12-29 stsp 
1473 b50a2b46 2022-12-29 stsp 	client->state = GOTD_STATE_EXPECT_CAPABILITIES;
1474 b50a2b46 2022-12-29 stsp 	log_debug("uid %d: expecting capabilities", client->euid);
1475 b50a2b46 2022-12-29 stsp 	return NULL;
1476 b50a2b46 2022-12-29 stsp }
1477 b50a2b46 2022-12-29 stsp 
1478 b50a2b46 2022-12-29 stsp static const struct got_error *
1479 13b2bc37 2022-10-23 stsp recv_packfile_done(uint32_t *client_id, struct imsg *imsg)
1480 13b2bc37 2022-10-23 stsp {
1481 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packfile_done idone;
1482 13b2bc37 2022-10-23 stsp 	size_t datalen;
1483 13b2bc37 2022-10-23 stsp 
1484 13b2bc37 2022-10-23 stsp 	log_debug("packfile-done received");
1485 13b2bc37 2022-10-23 stsp 
1486 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1487 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(idone))
1488 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1489 13b2bc37 2022-10-23 stsp 	memcpy(&idone, imsg->data, sizeof(idone));
1490 13b2bc37 2022-10-23 stsp 
1491 13b2bc37 2022-10-23 stsp 	*client_id = idone.client_id;
1492 13b2bc37 2022-10-23 stsp 	return NULL;
1493 13b2bc37 2022-10-23 stsp }
1494 13b2bc37 2022-10-23 stsp 
1495 13b2bc37 2022-10-23 stsp static const struct got_error *
1496 13b2bc37 2022-10-23 stsp recv_packfile_install(uint32_t *client_id, struct imsg *imsg)
1497 13b2bc37 2022-10-23 stsp {
1498 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packfile_install inst;
1499 13b2bc37 2022-10-23 stsp 	size_t datalen;
1500 13b2bc37 2022-10-23 stsp 
1501 13b2bc37 2022-10-23 stsp 	log_debug("packfile-install received");
1502 13b2bc37 2022-10-23 stsp 
1503 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1504 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(inst))
1505 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1506 13b2bc37 2022-10-23 stsp 	memcpy(&inst, imsg->data, sizeof(inst));
1507 13b2bc37 2022-10-23 stsp 
1508 13b2bc37 2022-10-23 stsp 	*client_id = inst.client_id;
1509 13b2bc37 2022-10-23 stsp 	return NULL;
1510 13b2bc37 2022-10-23 stsp }
1511 13b2bc37 2022-10-23 stsp 
1512 13b2bc37 2022-10-23 stsp static const struct got_error *
1513 13b2bc37 2022-10-23 stsp recv_ref_updates_start(uint32_t *client_id, struct imsg *imsg)
1514 13b2bc37 2022-10-23 stsp {
1515 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_ref_updates_start istart;
1516 13b2bc37 2022-10-23 stsp 	size_t datalen;
1517 13b2bc37 2022-10-23 stsp 
1518 13b2bc37 2022-10-23 stsp 	log_debug("ref-updates-start received");
1519 13b2bc37 2022-10-23 stsp 
1520 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1521 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(istart))
1522 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1523 13b2bc37 2022-10-23 stsp 	memcpy(&istart, imsg->data, sizeof(istart));
1524 13b2bc37 2022-10-23 stsp 
1525 13b2bc37 2022-10-23 stsp 	*client_id = istart.client_id;
1526 13b2bc37 2022-10-23 stsp 	return NULL;
1527 13b2bc37 2022-10-23 stsp }
1528 13b2bc37 2022-10-23 stsp 
1529 13b2bc37 2022-10-23 stsp static const struct got_error *
1530 13b2bc37 2022-10-23 stsp recv_ref_update(uint32_t *client_id, struct imsg *imsg)
1531 13b2bc37 2022-10-23 stsp {
1532 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_ref_update iref;
1533 13b2bc37 2022-10-23 stsp 	size_t datalen;
1534 13b2bc37 2022-10-23 stsp 
1535 13b2bc37 2022-10-23 stsp 	log_debug("ref-update received");
1536 13b2bc37 2022-10-23 stsp 
1537 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1538 13b2bc37 2022-10-23 stsp 	if (datalen < sizeof(iref))
1539 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1540 13b2bc37 2022-10-23 stsp 	memcpy(&iref, imsg->data, sizeof(iref));
1541 13b2bc37 2022-10-23 stsp 
1542 13b2bc37 2022-10-23 stsp 	*client_id = iref.client_id;
1543 13b2bc37 2022-10-23 stsp 	return NULL;
1544 13b2bc37 2022-10-23 stsp }
1545 13b2bc37 2022-10-23 stsp 
1546 13b2bc37 2022-10-23 stsp static const struct got_error *
1547 13b2bc37 2022-10-23 stsp send_ref_update_ok(struct gotd_client *client,
1548 13b2bc37 2022-10-23 stsp     struct gotd_imsg_ref_update *iref, const char *refname)
1549 13b2bc37 2022-10-23 stsp {
1550 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_ref_update_ok iok;
1551 13b2bc37 2022-10-23 stsp 	struct ibuf *wbuf;
1552 13b2bc37 2022-10-23 stsp 	size_t len;
1553 13b2bc37 2022-10-23 stsp 
1554 13b2bc37 2022-10-23 stsp 	memset(&iok, 0, sizeof(iok));
1555 13b2bc37 2022-10-23 stsp 	iok.client_id = client->id;
1556 13b2bc37 2022-10-23 stsp 	memcpy(iok.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
1557 13b2bc37 2022-10-23 stsp 	memcpy(iok.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
1558 13b2bc37 2022-10-23 stsp 	iok.name_len = strlen(refname);
1559 13b2bc37 2022-10-23 stsp 
1560 13b2bc37 2022-10-23 stsp 	len = sizeof(iok) + iok.name_len;
1561 13b2bc37 2022-10-23 stsp 	wbuf = imsg_create(&client->iev.ibuf, GOTD_IMSG_REF_UPDATE_OK,
1562 13b2bc37 2022-10-23 stsp 	    PROC_GOTD, gotd.pid, len);
1563 13b2bc37 2022-10-23 stsp 	if (wbuf == NULL)
1564 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_create REF_UPDATE_OK");
1565 13b2bc37 2022-10-23 stsp 
1566 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, &iok, sizeof(iok)) == -1)
1567 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_OK");
1568 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, refname, iok.name_len) == -1)
1569 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_OK");
1570 13b2bc37 2022-10-23 stsp 
1571 13b2bc37 2022-10-23 stsp 	wbuf->fd = -1;
1572 13b2bc37 2022-10-23 stsp 	imsg_close(&client->iev.ibuf, wbuf);
1573 13b2bc37 2022-10-23 stsp 	gotd_imsg_event_add(&client->iev);
1574 13b2bc37 2022-10-23 stsp 	return NULL;
1575 13b2bc37 2022-10-23 stsp }
1576 13b2bc37 2022-10-23 stsp 
1577 13b2bc37 2022-10-23 stsp static void
1578 13b2bc37 2022-10-23 stsp send_refs_updated(struct gotd_client *client)
1579 13b2bc37 2022-10-23 stsp {
1580 13b2bc37 2022-10-23 stsp 	if (gotd_imsg_compose_event(&client->iev,
1581 13b2bc37 2022-10-23 stsp 	    GOTD_IMSG_REFS_UPDATED, PROC_GOTD, -1, NULL, 0) == -1)
1582 13b2bc37 2022-10-23 stsp 		log_warn("imsg compose REFS_UPDATED");
1583 13b2bc37 2022-10-23 stsp }
1584 13b2bc37 2022-10-23 stsp 
1585 13b2bc37 2022-10-23 stsp static const struct got_error *
1586 13b2bc37 2022-10-23 stsp send_ref_update_ng(struct gotd_client *client,
1587 13b2bc37 2022-10-23 stsp     struct gotd_imsg_ref_update *iref, const char *refname,
1588 13b2bc37 2022-10-23 stsp     const char *reason)
1589 13b2bc37 2022-10-23 stsp {
1590 13b2bc37 2022-10-23 stsp 	const struct got_error *ng_err;
1591 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_ref_update_ng ing;
1592 13b2bc37 2022-10-23 stsp 	struct ibuf *wbuf;
1593 13b2bc37 2022-10-23 stsp 	size_t len;
1594 13b2bc37 2022-10-23 stsp 
1595 13b2bc37 2022-10-23 stsp 	memset(&ing, 0, sizeof(ing));
1596 13b2bc37 2022-10-23 stsp 	ing.client_id = client->id;
1597 13b2bc37 2022-10-23 stsp 	memcpy(ing.old_id, iref->old_id, SHA1_DIGEST_LENGTH);
1598 13b2bc37 2022-10-23 stsp 	memcpy(ing.new_id, iref->new_id, SHA1_DIGEST_LENGTH);
1599 13b2bc37 2022-10-23 stsp 	ing.name_len = strlen(refname);
1600 13b2bc37 2022-10-23 stsp 
1601 13b2bc37 2022-10-23 stsp 	ng_err = got_error_fmt(GOT_ERR_REF_BUSY, "%s", reason);
1602 13b2bc37 2022-10-23 stsp 	ing.reason_len = strlen(ng_err->msg);
1603 13b2bc37 2022-10-23 stsp 
1604 13b2bc37 2022-10-23 stsp 	len = sizeof(ing) + ing.name_len + ing.reason_len;
1605 13b2bc37 2022-10-23 stsp 	wbuf = imsg_create(&client->iev.ibuf, GOTD_IMSG_REF_UPDATE_NG,
1606 13b2bc37 2022-10-23 stsp 	    PROC_GOTD, gotd.pid, len);
1607 13b2bc37 2022-10-23 stsp 	if (wbuf == NULL)
1608 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_create REF_UPDATE_NG");
1609 13b2bc37 2022-10-23 stsp 
1610 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, &ing, sizeof(ing)) == -1)
1611 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_NG");
1612 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, refname, ing.name_len) == -1)
1613 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_NG");
1614 13b2bc37 2022-10-23 stsp 	if (imsg_add(wbuf, ng_err->msg, ing.reason_len) == -1)
1615 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("imsg_add REF_UPDATE_NG");
1616 13b2bc37 2022-10-23 stsp 
1617 13b2bc37 2022-10-23 stsp 	wbuf->fd = -1;
1618 13b2bc37 2022-10-23 stsp 	imsg_close(&client->iev.ibuf, wbuf);
1619 13b2bc37 2022-10-23 stsp 	gotd_imsg_event_add(&client->iev);
1620 13b2bc37 2022-10-23 stsp 	return NULL;
1621 13b2bc37 2022-10-23 stsp }
1622 13b2bc37 2022-10-23 stsp 
1623 13b2bc37 2022-10-23 stsp static const struct got_error *
1624 13b2bc37 2022-10-23 stsp install_pack(struct gotd_client *client, const char *repo_path,
1625 13b2bc37 2022-10-23 stsp     struct imsg *imsg)
1626 13b2bc37 2022-10-23 stsp {
1627 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
1628 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_packfile_install inst;
1629 13b2bc37 2022-10-23 stsp 	char hex[SHA1_DIGEST_STRING_LENGTH];
1630 13b2bc37 2022-10-23 stsp 	size_t datalen;
1631 13b2bc37 2022-10-23 stsp 	char *packfile_path = NULL, *packidx_path = NULL;
1632 13b2bc37 2022-10-23 stsp 
1633 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1634 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(inst))
1635 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1636 13b2bc37 2022-10-23 stsp 	memcpy(&inst, imsg->data, sizeof(inst));
1637 13b2bc37 2022-10-23 stsp 
1638 13b2bc37 2022-10-23 stsp 	if (client->packfile_path == NULL)
1639 13b2bc37 2022-10-23 stsp 		return got_error_msg(GOT_ERR_BAD_REQUEST,
1640 13b2bc37 2022-10-23 stsp 		    "client has no pack file");
1641 13b2bc37 2022-10-23 stsp 	if (client->packidx_path == NULL)
1642 13b2bc37 2022-10-23 stsp 		return got_error_msg(GOT_ERR_BAD_REQUEST,
1643 13b2bc37 2022-10-23 stsp 		    "client has no pack file index");
1644 13b2bc37 2022-10-23 stsp 
1645 13b2bc37 2022-10-23 stsp 	if (got_sha1_digest_to_str(inst.pack_sha1, hex, sizeof(hex)) == NULL)
1646 13b2bc37 2022-10-23 stsp 		return got_error_msg(GOT_ERR_NO_SPACE,
1647 13b2bc37 2022-10-23 stsp 		    "could not convert pack file SHA1 to hex");
1648 13b2bc37 2022-10-23 stsp 
1649 13b2bc37 2022-10-23 stsp 	if (asprintf(&packfile_path, "/%s/%s/pack-%s.pack",
1650 13b2bc37 2022-10-23 stsp 	    repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
1651 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("asprintf");
1652 13b2bc37 2022-10-23 stsp 		goto done;
1653 13b2bc37 2022-10-23 stsp 	}
1654 13b2bc37 2022-10-23 stsp 
1655 13b2bc37 2022-10-23 stsp 	if (asprintf(&packidx_path, "/%s/%s/pack-%s.idx",
1656 13b2bc37 2022-10-23 stsp 	    repo_path, GOT_OBJECTS_PACK_DIR, hex) == -1) {
1657 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno("asprintf");
1658 13b2bc37 2022-10-23 stsp 		goto done;
1659 13b2bc37 2022-10-23 stsp 	}
1660 13b2bc37 2022-10-23 stsp 
1661 13b2bc37 2022-10-23 stsp 	if (rename(client->packfile_path, packfile_path) == -1) {
1662 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno3("rename", client->packfile_path,
1663 13b2bc37 2022-10-23 stsp 		    packfile_path);
1664 13b2bc37 2022-10-23 stsp 		goto done;
1665 13b2bc37 2022-10-23 stsp 	}
1666 13b2bc37 2022-10-23 stsp 
1667 13b2bc37 2022-10-23 stsp 	free(client->packfile_path);
1668 13b2bc37 2022-10-23 stsp 	client->packfile_path = NULL;
1669 13b2bc37 2022-10-23 stsp 
1670 13b2bc37 2022-10-23 stsp 	if (rename(client->packidx_path, packidx_path) == -1) {
1671 13b2bc37 2022-10-23 stsp 		err = got_error_from_errno3("rename", client->packidx_path,
1672 13b2bc37 2022-10-23 stsp 		    packidx_path);
1673 13b2bc37 2022-10-23 stsp 		goto done;
1674 13b2bc37 2022-10-23 stsp 	}
1675 13b2bc37 2022-10-23 stsp 
1676 13b2bc37 2022-10-23 stsp 	free(client->packidx_path);
1677 13b2bc37 2022-10-23 stsp 	client->packidx_path = NULL;
1678 13b2bc37 2022-10-23 stsp done:
1679 13b2bc37 2022-10-23 stsp 	free(packfile_path);
1680 13b2bc37 2022-10-23 stsp 	free(packidx_path);
1681 13b2bc37 2022-10-23 stsp 	return err;
1682 13b2bc37 2022-10-23 stsp }
1683 13b2bc37 2022-10-23 stsp 
1684 13b2bc37 2022-10-23 stsp static const struct got_error *
1685 13b2bc37 2022-10-23 stsp begin_ref_updates(struct gotd_client *client, struct imsg *imsg)
1686 13b2bc37 2022-10-23 stsp {
1687 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_ref_updates_start istart;
1688 13b2bc37 2022-10-23 stsp 	size_t datalen;
1689 13b2bc37 2022-10-23 stsp 
1690 13b2bc37 2022-10-23 stsp 	if (client->nref_updates != -1)
1691 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
1692 13b2bc37 2022-10-23 stsp 
1693 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1694 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(istart))
1695 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1696 13b2bc37 2022-10-23 stsp 	memcpy(&istart, imsg->data, sizeof(istart));
1697 13b2bc37 2022-10-23 stsp 
1698 13b2bc37 2022-10-23 stsp 	if (istart.nref_updates <= 0)
1699 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
1700 13b2bc37 2022-10-23 stsp 
1701 13b2bc37 2022-10-23 stsp 	client->nref_updates = istart.nref_updates;
1702 13b2bc37 2022-10-23 stsp 	return NULL;
1703 13b2bc37 2022-10-23 stsp }
1704 13b2bc37 2022-10-23 stsp 
1705 13b2bc37 2022-10-23 stsp static const struct got_error *
1706 13b2bc37 2022-10-23 stsp update_ref(struct gotd_client *client, const char *repo_path,
1707 13b2bc37 2022-10-23 stsp     struct imsg *imsg)
1708 13b2bc37 2022-10-23 stsp {
1709 13b2bc37 2022-10-23 stsp 	const struct got_error *err = NULL;
1710 13b2bc37 2022-10-23 stsp 	struct got_repository *repo = NULL;
1711 13b2bc37 2022-10-23 stsp 	struct got_reference *ref = NULL;
1712 13b2bc37 2022-10-23 stsp 	struct gotd_imsg_ref_update iref;
1713 13b2bc37 2022-10-23 stsp 	struct got_object_id old_id, new_id;
1714 13b2bc37 2022-10-23 stsp 	struct got_object_id *id = NULL;
1715 13b2bc37 2022-10-23 stsp 	struct got_object *obj = NULL;
1716 13b2bc37 2022-10-23 stsp 	char *refname = NULL;
1717 13b2bc37 2022-10-23 stsp 	size_t datalen;
1718 13b2bc37 2022-10-23 stsp 	int locked = 0;
1719 13b2bc37 2022-10-23 stsp 
1720 13b2bc37 2022-10-23 stsp 	log_debug("update-ref from uid %d", client->euid);
1721 13b2bc37 2022-10-23 stsp 
1722 13b2bc37 2022-10-23 stsp 	if (client->nref_updates <= 0)
1723 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_MSG);
1724 13b2bc37 2022-10-23 stsp 
1725 13b2bc37 2022-10-23 stsp 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1726 13b2bc37 2022-10-23 stsp 	if (datalen < sizeof(iref))
1727 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1728 13b2bc37 2022-10-23 stsp 	memcpy(&iref, imsg->data, sizeof(iref));
1729 13b2bc37 2022-10-23 stsp 	if (datalen != sizeof(iref) + iref.name_len)
1730 13b2bc37 2022-10-23 stsp 		return got_error(GOT_ERR_PRIVSEP_LEN);
1731 13b2bc37 2022-10-23 stsp 	refname = malloc(iref.name_len + 1);
1732 13b2bc37 2022-10-23 stsp 	if (refname == NULL)
1733 13b2bc37 2022-10-23 stsp 		return got_error_from_errno("malloc");
1734 13b2bc37 2022-10-23 stsp 	memcpy(refname, imsg->data + sizeof(iref), iref.name_len);
1735 13b2bc37 2022-10-23 stsp 	refname[iref.name_len] = '\0';
1736 13b2bc37 2022-10-23 stsp 
1737 13b2bc37 2022-10-23 stsp 	log_debug("updating ref %s for uid %d", refname, client->euid);
1738 13b2bc37 2022-10-23 stsp 
1739 13b2bc37 2022-10-23 stsp 	err = got_repo_open(&repo, repo_path, NULL, NULL);
1740 13b2bc37 2022-10-23 stsp 	if (err)
1741 13b2bc37 2022-10-23 stsp 		goto done;
1742 13b2bc37 2022-10-23 stsp 
1743 13b2bc37 2022-10-23 stsp 	memcpy(old_id.sha1, iref.old_id, SHA1_DIGEST_LENGTH);
1744 13b2bc37 2022-10-23 stsp 	memcpy(new_id.sha1, iref.new_id, SHA1_DIGEST_LENGTH);
1745 13b2bc37 2022-10-23 stsp 	err = got_object_open(&obj, repo, &new_id);
1746 13b2bc37 2022-10-23 stsp 	if (err)
1747 13b2bc37 2022-10-23 stsp 		goto done;
1748 13b2bc37 2022-10-23 stsp 
1749 13b2bc37 2022-10-23 stsp 	if (iref.ref_is_new) {
1750 13b2bc37 2022-10-23 stsp 		err = got_ref_open(&ref, repo, refname, 0);
1751 13b2bc37 2022-10-23 stsp 		if (err) {
1752 13b2bc37 2022-10-23 stsp 			if (err->code != GOT_ERR_NOT_REF)
1753 13b2bc37 2022-10-23 stsp 				goto done;
1754 13b2bc37 2022-10-23 stsp 			err = got_ref_alloc(&ref, refname, &new_id);
1755 13b2bc37 2022-10-23 stsp 			if (err)
1756 13b2bc37 2022-10-23 stsp 				goto done;
1757 13b2bc37 2022-10-23 stsp 			err = got_ref_write(ref, repo); /* will lock/unlock */
1758 13b2bc37 2022-10-23 stsp 			if (err)
1759 13b2bc37 2022-10-23 stsp 				goto done;
1760 13b2bc37 2022-10-23 stsp 		} else {
1761 13b2bc37 2022-10-23 stsp 			err = got_error_fmt(GOT_ERR_REF_BUSY,
1762 13b2bc37 2022-10-23 stsp 			    "%s has been created by someone else "
1763 13b2bc37 2022-10-23 stsp 			    "while transaction was in progress",
1764 13b2bc37 2022-10-23 stsp 			    got_ref_get_name(ref));
1765 13b2bc37 2022-10-23 stsp 			goto done;
1766 13b2bc37 2022-10-23 stsp 		}
1767 13b2bc37 2022-10-23 stsp 	} else {
1768 13b2bc37 2022-10-23 stsp 		err = got_ref_open(&ref, repo, refname, 1 /* lock */);
1769 13b2bc37 2022-10-23 stsp 		if (err)
1770 13b2bc37 2022-10-23 stsp 			goto done;
1771 13b2bc37 2022-10-23 stsp 		locked = 1;
1772 13b2bc37 2022-10-23 stsp 
1773 13b2bc37 2022-10-23 stsp 		err = got_ref_resolve(&id, repo, ref);
1774 13b2bc37 2022-10-23 stsp 		if (err)
1775 13b2bc37 2022-10-23 stsp 			goto done;
1776 13b2bc37 2022-10-23 stsp 
1777 13b2bc37 2022-10-23 stsp 		if (got_object_id_cmp(id, &old_id) != 0) {
1778 13b2bc37 2022-10-23 stsp 			err = got_error_fmt(GOT_ERR_REF_BUSY,
1779 13b2bc37 2022-10-23 stsp 			    "%s has been modified by someone else "
1780 13b2bc37 2022-10-23 stsp 			    "while transaction was in progress",
1781 13b2bc37 2022-10-23 stsp 			    got_ref_get_name(ref));
1782 13b2bc37 2022-10-23 stsp 			goto done;
1783 13b2bc37 2022-10-23 stsp 		}
1784 13b2bc37 2022-10-23 stsp 
1785 13b2bc37 2022-10-23 stsp 		err = got_ref_change_ref(ref, &new_id);
1786 13b2bc37 2022-10-23 stsp 		if (err)
1787 13b2bc37 2022-10-23 stsp 			goto done;
1788 13b2bc37 2022-10-23 stsp 
1789 13b2bc37 2022-10-23 stsp 		err = got_ref_write(ref, repo);
1790 13b2bc37 2022-10-23 stsp 		if (err)
1791 13b2bc37 2022-10-23 stsp 			goto done;
1792 13b2bc37 2022-10-23 stsp 
1793 13b2bc37 2022-10-23 stsp 		free(id);
1794 13b2bc37 2022-10-23 stsp 		id = NULL;
1795 13b2bc37 2022-10-23 stsp 	}
1796 13b2bc37 2022-10-23 stsp done:
1797 13b2bc37 2022-10-23 stsp 	if (err) {
1798 13b2bc37 2022-10-23 stsp 		if (err->code == GOT_ERR_LOCKFILE_TIMEOUT) {
1799 13b2bc37 2022-10-23 stsp 			err = got_error_fmt(GOT_ERR_LOCKFILE_TIMEOUT,
1800 13b2bc37 2022-10-23 stsp 			    "could not acquire exclusive file lock for %s",
1801 13b2bc37 2022-10-23 stsp 			    refname);
1802 13b2bc37 2022-10-23 stsp 		}
1803 13b2bc37 2022-10-23 stsp 		send_ref_update_ng(client, &iref, refname, err->msg);
1804 13b2bc37 2022-10-23 stsp 	} else
1805 13b2bc37 2022-10-23 stsp 		send_ref_update_ok(client, &iref, refname);
1806 13b2bc37 2022-10-23 stsp 
1807 13b2bc37 2022-10-23 stsp 	if (client->nref_updates > 0) {
1808 13b2bc37 2022-10-23 stsp 		client->nref_updates--;
1809 13b2bc37 2022-10-23 stsp 		if (client->nref_updates == 0)
1810 13b2bc37 2022-10-23 stsp 			send_refs_updated(client);
1811 13b2bc37 2022-10-23 stsp 
1812 13b2bc37 2022-10-23 stsp 	}
1813 13b2bc37 2022-10-23 stsp 	if (locked) {
1814 13b2bc37 2022-10-23 stsp 		const struct got_error *unlock_err;
1815 13b2bc37 2022-10-23 stsp 		unlock_err = got_ref_unlock(ref);
1816 13b2bc37 2022-10-23 stsp 		if (unlock_err && err == NULL)
1817 13b2bc37 2022-10-23 stsp 			err = unlock_err;
1818 13b2bc37 2022-10-23 stsp 	}
1819 13b2bc37 2022-10-23 stsp 	if (ref)
1820 13b2bc37 2022-10-23 stsp 		got_ref_close(ref);
1821 13b2bc37 2022-10-23 stsp 	if (obj)
1822 13b2bc37 2022-10-23 stsp 		got_object_close(obj);
1823 13b2bc37 2022-10-23 stsp 	if (repo)
1824 13b2bc37 2022-10-23 stsp 		got_repo_close(repo);
1825 13b2bc37 2022-10-23 stsp 	free(refname);
1826 13b2bc37 2022-10-23 stsp 	free(id);
1827 13b2bc37 2022-10-23 stsp 	return err;
1828 13b2bc37 2022-10-23 stsp }
1829 13b2bc37 2022-10-23 stsp 
1830 13b2bc37 2022-10-23 stsp static void
1831 b50a2b46 2022-12-29 stsp gotd_dispatch_listener(int fd, short event, void *arg)
1832 13b2bc37 2022-10-23 stsp {
1833 13b2bc37 2022-10-23 stsp 	struct gotd_imsgev *iev = arg;
1834 13b2bc37 2022-10-23 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
1835 b50a2b46 2022-12-29 stsp 	struct gotd_child_proc *proc = &gotd.listen_proc;
1836 b50a2b46 2022-12-29 stsp 	ssize_t n;
1837 b50a2b46 2022-12-29 stsp 	int shut = 0;
1838 b50a2b46 2022-12-29 stsp 	struct imsg imsg;
1839 b50a2b46 2022-12-29 stsp 
1840 b50a2b46 2022-12-29 stsp 	if (proc->iev.ibuf.fd != fd)
1841 b50a2b46 2022-12-29 stsp 		fatalx("%s: unexpected fd %d", __func__, fd);
1842 b50a2b46 2022-12-29 stsp 
1843 b50a2b46 2022-12-29 stsp 	if (event & EV_READ) {
1844 b50a2b46 2022-12-29 stsp 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1845 b50a2b46 2022-12-29 stsp 			fatal("imsg_read error");
1846 b50a2b46 2022-12-29 stsp 		if (n == 0) {
1847 b50a2b46 2022-12-29 stsp 			/* Connection closed. */
1848 b50a2b46 2022-12-29 stsp 			shut = 1;
1849 b50a2b46 2022-12-29 stsp 			goto done;
1850 b50a2b46 2022-12-29 stsp 		}
1851 b50a2b46 2022-12-29 stsp 	}
1852 b50a2b46 2022-12-29 stsp 
1853 b50a2b46 2022-12-29 stsp 	if (event & EV_WRITE) {
1854 b50a2b46 2022-12-29 stsp 		n = msgbuf_write(&ibuf->w);
1855 b50a2b46 2022-12-29 stsp 		if (n == -1 && errno != EAGAIN)
1856 b50a2b46 2022-12-29 stsp 			fatal("msgbuf_write");
1857 b50a2b46 2022-12-29 stsp 		if (n == 0) {
1858 b50a2b46 2022-12-29 stsp 			/* Connection closed. */
1859 b50a2b46 2022-12-29 stsp 			shut = 1;
1860 b50a2b46 2022-12-29 stsp 			goto done;
1861 b50a2b46 2022-12-29 stsp 		}
1862 b50a2b46 2022-12-29 stsp 	}
1863 b50a2b46 2022-12-29 stsp 
1864 b50a2b46 2022-12-29 stsp 	for (;;) {
1865 b50a2b46 2022-12-29 stsp 		const struct got_error *err = NULL;
1866 b50a2b46 2022-12-29 stsp 		struct gotd_client *client = NULL;
1867 b50a2b46 2022-12-29 stsp 		uint32_t client_id = 0;
1868 b50a2b46 2022-12-29 stsp 		int do_disconnect = 0;
1869 b50a2b46 2022-12-29 stsp 
1870 b50a2b46 2022-12-29 stsp 		if ((n = imsg_get(ibuf, &imsg)) == -1)
1871 b50a2b46 2022-12-29 stsp 			fatal("%s: imsg_get error", __func__);
1872 b50a2b46 2022-12-29 stsp 		if (n == 0)	/* No more messages. */
1873 b50a2b46 2022-12-29 stsp 			break;
1874 b50a2b46 2022-12-29 stsp 
1875 b50a2b46 2022-12-29 stsp 		switch (imsg.hdr.type) {
1876 b50a2b46 2022-12-29 stsp 		case GOTD_IMSG_ERROR:
1877 b50a2b46 2022-12-29 stsp 			do_disconnect = 1;
1878 b50a2b46 2022-12-29 stsp 			err = gotd_imsg_recv_error(&client_id, &imsg);
1879 b50a2b46 2022-12-29 stsp 			break;
1880 b50a2b46 2022-12-29 stsp 		case GOTD_IMSG_CONNECT:
1881 b50a2b46 2022-12-29 stsp 			err = recv_connect(&client_id, &imsg);
1882 b50a2b46 2022-12-29 stsp 			break;
1883 b50a2b46 2022-12-29 stsp 		default:
1884 b50a2b46 2022-12-29 stsp 			log_debug("unexpected imsg %d", imsg.hdr.type);
1885 b50a2b46 2022-12-29 stsp 			break;
1886 b50a2b46 2022-12-29 stsp 		}
1887 b50a2b46 2022-12-29 stsp 
1888 b50a2b46 2022-12-29 stsp 		client = find_client(client_id);
1889 b50a2b46 2022-12-29 stsp 		if (client == NULL) {
1890 b50a2b46 2022-12-29 stsp 			log_warnx("%s: client not found", __func__);
1891 b50a2b46 2022-12-29 stsp 			imsg_free(&imsg);
1892 b50a2b46 2022-12-29 stsp 			continue;
1893 b50a2b46 2022-12-29 stsp 		}
1894 b50a2b46 2022-12-29 stsp 
1895 b50a2b46 2022-12-29 stsp 		if (err)
1896 b50a2b46 2022-12-29 stsp 			log_warnx("uid %d: %s", client->euid, err->msg);
1897 b50a2b46 2022-12-29 stsp 
1898 b50a2b46 2022-12-29 stsp 		if (do_disconnect) {
1899 b50a2b46 2022-12-29 stsp 			if (err)
1900 b50a2b46 2022-12-29 stsp 				disconnect_on_error(client, err);
1901 b50a2b46 2022-12-29 stsp 			else
1902 b50a2b46 2022-12-29 stsp 				disconnect(client);
1903 b50a2b46 2022-12-29 stsp 		}
1904 b50a2b46 2022-12-29 stsp 
1905 b50a2b46 2022-12-29 stsp 		imsg_free(&imsg);
1906 b50a2b46 2022-12-29 stsp 	}
1907 b50a2b46 2022-12-29 stsp done:
1908 b50a2b46 2022-12-29 stsp 	if (!shut) {
1909 b50a2b46 2022-12-29 stsp 		gotd_imsg_event_add(iev);
1910 b50a2b46 2022-12-29 stsp 	} else {
1911 b50a2b46 2022-12-29 stsp 		/* This pipe is dead. Remove its event handler */
1912 b50a2b46 2022-12-29 stsp 		event_del(&iev->ev);
1913 b50a2b46 2022-12-29 stsp 		event_loopexit(NULL);
1914 b50a2b46 2022-12-29 stsp 	}
1915 b50a2b46 2022-12-29 stsp }
1916 b50a2b46 2022-12-29 stsp 
1917 b50a2b46 2022-12-29 stsp static void
1918 5e25db14 2022-12-29 stsp gotd_dispatch_auth_child(int fd, short event, void *arg)
1919 5e25db14 2022-12-29 stsp {
1920 5e25db14 2022-12-29 stsp 	const struct got_error *err = NULL;
1921 5e25db14 2022-12-29 stsp 	struct gotd_imsgev *iev = arg;
1922 5e25db14 2022-12-29 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
1923 5e25db14 2022-12-29 stsp 	struct gotd_client *client;
1924 5e25db14 2022-12-29 stsp 	struct gotd_repo *repo = NULL;
1925 5e25db14 2022-12-29 stsp 	ssize_t n;
1926 5e25db14 2022-12-29 stsp 	int shut = 0;
1927 5e25db14 2022-12-29 stsp 	struct imsg imsg;
1928 5e25db14 2022-12-29 stsp 	uint32_t client_id = 0;
1929 5e25db14 2022-12-29 stsp 	int do_disconnect = 0;
1930 5e25db14 2022-12-29 stsp 	enum gotd_procid proc_type;
1931 5e25db14 2022-12-29 stsp 
1932 5e25db14 2022-12-29 stsp 	client = find_client_by_proc_fd(fd);
1933 5e25db14 2022-12-29 stsp 	if (client == NULL)
1934 5e25db14 2022-12-29 stsp 		fatalx("cannot find client for fd %d", fd);
1935 5e25db14 2022-12-29 stsp 
1936 5e25db14 2022-12-29 stsp 	if (client->auth == NULL)
1937 5e25db14 2022-12-29 stsp 		fatalx("cannot find auth child process for fd %d", fd);
1938 5e25db14 2022-12-29 stsp 
1939 5e25db14 2022-12-29 stsp 	if (event & EV_READ) {
1940 5e25db14 2022-12-29 stsp 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
1941 5e25db14 2022-12-29 stsp 			fatal("imsg_read error");
1942 5e25db14 2022-12-29 stsp 		if (n == 0) {
1943 5e25db14 2022-12-29 stsp 			/* Connection closed. */
1944 5e25db14 2022-12-29 stsp 			shut = 1;
1945 5e25db14 2022-12-29 stsp 			goto done;
1946 5e25db14 2022-12-29 stsp 		}
1947 5e25db14 2022-12-29 stsp 	}
1948 5e25db14 2022-12-29 stsp 
1949 5e25db14 2022-12-29 stsp 	if (event & EV_WRITE) {
1950 5e25db14 2022-12-29 stsp 		n = msgbuf_write(&ibuf->w);
1951 5e25db14 2022-12-29 stsp 		if (n == -1 && errno != EAGAIN)
1952 5e25db14 2022-12-29 stsp 			fatal("msgbuf_write");
1953 5e25db14 2022-12-29 stsp 		if (n == 0) {
1954 5e25db14 2022-12-29 stsp 			/* Connection closed. */
1955 5e25db14 2022-12-29 stsp 			shut = 1;
1956 5e25db14 2022-12-29 stsp 		}
1957 5e25db14 2022-12-29 stsp 		goto done;
1958 5e25db14 2022-12-29 stsp 	}
1959 5e25db14 2022-12-29 stsp 
1960 5e25db14 2022-12-29 stsp 	if (client->auth->iev.ibuf.fd != fd)
1961 5e25db14 2022-12-29 stsp 		fatalx("%s: unexpected fd %d", __func__, fd);
1962 5e25db14 2022-12-29 stsp 
1963 5e25db14 2022-12-29 stsp 	if ((n = imsg_get(ibuf, &imsg)) == -1)
1964 5e25db14 2022-12-29 stsp 		fatal("%s: imsg_get error", __func__);
1965 5e25db14 2022-12-29 stsp 	if (n == 0)	/* No more messages. */
1966 5e25db14 2022-12-29 stsp 		return;
1967 5e25db14 2022-12-29 stsp 
1968 5e25db14 2022-12-29 stsp 	evtimer_del(&client->tmo);
1969 5e25db14 2022-12-29 stsp 
1970 5e25db14 2022-12-29 stsp 	switch (imsg.hdr.type) {
1971 5e25db14 2022-12-29 stsp 	case GOTD_IMSG_ERROR:
1972 5e25db14 2022-12-29 stsp 		do_disconnect = 1;
1973 5e25db14 2022-12-29 stsp 		err = gotd_imsg_recv_error(&client_id, &imsg);
1974 5e25db14 2022-12-29 stsp 		break;
1975 5e25db14 2022-12-29 stsp 	case GOTD_IMSG_ACCESS_GRANTED:
1976 5e25db14 2022-12-29 stsp 		break;
1977 5e25db14 2022-12-29 stsp 	default:
1978 5e25db14 2022-12-29 stsp 		do_disconnect = 1;
1979 5e25db14 2022-12-29 stsp 		log_debug("unexpected imsg %d", imsg.hdr.type);
1980 5e25db14 2022-12-29 stsp 		break;
1981 5e25db14 2022-12-29 stsp 	}
1982 5e25db14 2022-12-29 stsp 
1983 5e25db14 2022-12-29 stsp 	if (!verify_imsg_src(client, client->auth, &imsg)) {
1984 5e25db14 2022-12-29 stsp 		do_disconnect = 1;
1985 5e25db14 2022-12-29 stsp 		log_debug("dropping imsg type %d from PID %d",
1986 5e25db14 2022-12-29 stsp 		    imsg.hdr.type, client->auth->pid);
1987 5e25db14 2022-12-29 stsp 	}
1988 5e25db14 2022-12-29 stsp 	imsg_free(&imsg);
1989 5e25db14 2022-12-29 stsp 
1990 5e25db14 2022-12-29 stsp 	if (do_disconnect) {
1991 5e25db14 2022-12-29 stsp 		if (err)
1992 5e25db14 2022-12-29 stsp 			disconnect_on_error(client, err);
1993 5e25db14 2022-12-29 stsp 		else
1994 5e25db14 2022-12-29 stsp 			disconnect(client);
1995 5e25db14 2022-12-29 stsp 		goto done;
1996 5e25db14 2022-12-29 stsp 	}
1997 5e25db14 2022-12-29 stsp 
1998 5e25db14 2022-12-29 stsp 	repo = find_repo_by_name(client->auth->repo_name);
1999 5e25db14 2022-12-29 stsp 	if (repo == NULL) {
2000 5e25db14 2022-12-29 stsp 		err = got_error(GOT_ERR_NOT_GIT_REPO);
2001 5e25db14 2022-12-29 stsp 		goto done;
2002 5e25db14 2022-12-29 stsp 	}
2003 5e25db14 2022-12-29 stsp 	kill_auth_proc(client);
2004 5e25db14 2022-12-29 stsp 
2005 5e25db14 2022-12-29 stsp 	log_info("authenticated uid %d for repository %s\n",
2006 5e25db14 2022-12-29 stsp 	    client->euid, repo->name);
2007 5e25db14 2022-12-29 stsp 
2008 5e25db14 2022-12-29 stsp 	if (client->required_auth & GOTD_AUTH_WRITE)
2009 5e25db14 2022-12-29 stsp 		proc_type = PROC_REPO_WRITE;
2010 5e25db14 2022-12-29 stsp 	else
2011 5e25db14 2022-12-29 stsp 		proc_type = PROC_REPO_READ;
2012 5e25db14 2022-12-29 stsp 
2013 7fdc3e58 2022-12-30 mark 	err = start_repo_child(client, proc_type, repo, gotd.argv0,
2014 7fdc3e58 2022-12-30 mark 	    gotd.confpath, gotd.daemonize, gotd.verbosity);
2015 5e25db14 2022-12-29 stsp done:
2016 5e25db14 2022-12-29 stsp 	if (err)
2017 5e25db14 2022-12-29 stsp 		log_warnx("uid %d: %s", client->euid, err->msg);
2018 5e25db14 2022-12-29 stsp 
2019 5e25db14 2022-12-29 stsp 	/* We might have killed the auth process by now. */
2020 5e25db14 2022-12-29 stsp 	if (client->auth != NULL) {
2021 5e25db14 2022-12-29 stsp 		if (!shut) {
2022 5e25db14 2022-12-29 stsp 			gotd_imsg_event_add(iev);
2023 5e25db14 2022-12-29 stsp 		} else {
2024 5e25db14 2022-12-29 stsp 			/* This pipe is dead. Remove its event handler */
2025 5e25db14 2022-12-29 stsp 			event_del(&iev->ev);
2026 5e25db14 2022-12-29 stsp 		}
2027 5e25db14 2022-12-29 stsp 	}
2028 5e25db14 2022-12-29 stsp }
2029 5e25db14 2022-12-29 stsp 
2030 5e25db14 2022-12-29 stsp static void
2031 b50a2b46 2022-12-29 stsp gotd_dispatch_repo_child(int fd, short event, void *arg)
2032 b50a2b46 2022-12-29 stsp {
2033 b50a2b46 2022-12-29 stsp 	struct gotd_imsgev *iev = arg;
2034 b50a2b46 2022-12-29 stsp 	struct imsgbuf *ibuf = &iev->ibuf;
2035 13b2bc37 2022-10-23 stsp 	struct gotd_child_proc *proc = NULL;
2036 b50a2b46 2022-12-29 stsp 	struct gotd_client *client = NULL;
2037 13b2bc37 2022-10-23 stsp 	ssize_t n;
2038 13b2bc37 2022-10-23 stsp 	int shut = 0;
2039 13b2bc37 2022-10-23 stsp 	struct imsg imsg;
2040 13b2bc37 2022-10-23 stsp 
2041 13b2bc37 2022-10-23 stsp 	if (event & EV_READ) {
2042 13b2bc37 2022-10-23 stsp 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
2043 13b2bc37 2022-10-23 stsp 			fatal("imsg_read error");
2044 13b2bc37 2022-10-23 stsp 		if (n == 0) {
2045 13b2bc37 2022-10-23 stsp 			/* Connection closed. */
2046 13b2bc37 2022-10-23 stsp 			shut = 1;
2047 13b2bc37 2022-10-23 stsp 			goto done;
2048 13b2bc37 2022-10-23 stsp 		}
2049 13b2bc37 2022-10-23 stsp 	}
2050 13b2bc37 2022-10-23 stsp 
2051 13b2bc37 2022-10-23 stsp 	if (event & EV_WRITE) {
2052 13b2bc37 2022-10-23 stsp 		n = msgbuf_write(&ibuf->w);
2053 13b2bc37 2022-10-23 stsp 		if (n == -1 && errno != EAGAIN)
2054 13b2bc37 2022-10-23 stsp 			fatal("msgbuf_write");
2055 13b2bc37 2022-10-23 stsp 		if (n == 0) {
2056 13b2bc37 2022-10-23 stsp 			/* Connection closed. */
2057 13b2bc37 2022-10-23 stsp 			shut = 1;
2058 13b2bc37 2022-10-23 stsp 			goto done;
2059 13b2bc37 2022-10-23 stsp 		}
2060 13b2bc37 2022-10-23 stsp 	}
2061 13b2bc37 2022-10-23 stsp 
2062 b50a2b46 2022-12-29 stsp 	client = find_client_by_proc_fd(fd);
2063 b50a2b46 2022-12-29 stsp 	if (client == NULL)
2064 b50a2b46 2022-12-29 stsp 		fatalx("cannot find client for fd %d", fd);
2065 b50a2b46 2022-12-29 stsp 
2066 b50a2b46 2022-12-29 stsp 	proc = get_client_proc(client);
2067 13b2bc37 2022-10-23 stsp 	if (proc == NULL)
2068 13b2bc37 2022-10-23 stsp 		fatalx("cannot find child process for fd %d", fd);
2069 13b2bc37 2022-10-23 stsp 
2070 13b2bc37 2022-10-23 stsp 	for (;;) {
2071 13b2bc37 2022-10-23 stsp 		const struct got_error *err = NULL;
2072 13b2bc37 2022-10-23 stsp 		uint32_t client_id = 0;
2073 13b2bc37 2022-10-23 stsp 		int do_disconnect = 0;
2074 b50a2b46 2022-12-29 stsp 		int do_list_refs = 0, do_ref_updates = 0, do_ref_update = 0;
2075 13b2bc37 2022-10-23 stsp 		int do_packfile_install = 0;
2076 13b2bc37 2022-10-23 stsp 
2077 13b2bc37 2022-10-23 stsp 		if ((n = imsg_get(ibuf, &imsg)) == -1)
2078 13b2bc37 2022-10-23 stsp 			fatal("%s: imsg_get error", __func__);
2079 13b2bc37 2022-10-23 stsp 		if (n == 0)	/* No more messages. */
2080 13b2bc37 2022-10-23 stsp 			break;
2081 13b2bc37 2022-10-23 stsp 
2082 13b2bc37 2022-10-23 stsp 		switch (imsg.hdr.type) {
2083 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_ERROR:
2084 13b2bc37 2022-10-23 stsp 			do_disconnect = 1;
2085 13b2bc37 2022-10-23 stsp 			err = gotd_imsg_recv_error(&client_id, &imsg);
2086 13b2bc37 2022-10-23 stsp 			break;
2087 b50a2b46 2022-12-29 stsp 		case GOTD_IMSG_REPO_CHILD_READY:
2088 b50a2b46 2022-12-29 stsp 			do_list_refs = 1;
2089 d93ecf7d 2022-12-14 stsp 			break;
2090 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_PACKFILE_DONE:
2091 13b2bc37 2022-10-23 stsp 			do_disconnect = 1;
2092 13b2bc37 2022-10-23 stsp 			err = recv_packfile_done(&client_id, &imsg);
2093 13b2bc37 2022-10-23 stsp 			break;
2094 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_PACKFILE_INSTALL:
2095 13b2bc37 2022-10-23 stsp 			err = recv_packfile_install(&client_id, &imsg);
2096 13b2bc37 2022-10-23 stsp 			if (err == NULL)
2097 13b2bc37 2022-10-23 stsp 				do_packfile_install = 1;
2098 13b2bc37 2022-10-23 stsp 			break;
2099 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_REF_UPDATES_START:
2100 13b2bc37 2022-10-23 stsp 			err = recv_ref_updates_start(&client_id, &imsg);
2101 13b2bc37 2022-10-23 stsp 			if (err == NULL)
2102 13b2bc37 2022-10-23 stsp 				do_ref_updates = 1;
2103 13b2bc37 2022-10-23 stsp 			break;
2104 13b2bc37 2022-10-23 stsp 		case GOTD_IMSG_REF_UPDATE:
2105 13b2bc37 2022-10-23 stsp 			err = recv_ref_update(&client_id, &imsg);
2106 13b2bc37 2022-10-23 stsp 			if (err == NULL)
2107 13b2bc37 2022-10-23 stsp 				do_ref_update = 1;
2108 13b2bc37 2022-10-23 stsp 			break;
2109 13b2bc37 2022-10-23 stsp 		default:
2110 13b2bc37 2022-10-23 stsp 			log_debug("unexpected imsg %d", imsg.hdr.type);
2111 13b2bc37 2022-10-23 stsp 			break;
2112 13b2bc37 2022-10-23 stsp 		}
2113 13b2bc37 2022-10-23 stsp 
2114 13b2bc37 2022-10-23 stsp 		if (!verify_imsg_src(client, proc, &imsg)) {
2115 13b2bc37 2022-10-23 stsp 			log_debug("dropping imsg type %d from PID %d",
2116 13b2bc37 2022-10-23 stsp 			    imsg.hdr.type, proc->pid);
2117 13b2bc37 2022-10-23 stsp 			imsg_free(&imsg);
2118 13b2bc37 2022-10-23 stsp 			continue;
2119 13b2bc37 2022-10-23 stsp 		}
2120 13b2bc37 2022-10-23 stsp 		if (err)
2121 13b2bc37 2022-10-23 stsp 			log_warnx("uid %d: %s", client->euid, err->msg);
2122 13b2bc37 2022-10-23 stsp 
2123 13b2bc37 2022-10-23 stsp 		if (do_disconnect) {
2124 13b2bc37 2022-10-23 stsp 			if (err)
2125 13b2bc37 2022-10-23 stsp 				disconnect_on_error(client, err);
2126 13b2bc37 2022-10-23 stsp 			else
2127 13b2bc37 2022-10-23 stsp 				disconnect(client);
2128 36c7cfbb 2022-11-04 stsp 		} else {
2129 b50a2b46 2022-12-29 stsp 			if (do_list_refs)
2130 b50a2b46 2022-12-29 stsp 				err = list_refs_request(client, iev);
2131 b50a2b46 2022-12-29 stsp 			else if (do_packfile_install)
2132 eec68231 2022-12-14 stsp 				err = install_pack(client, proc->repo_path,
2133 36c7cfbb 2022-11-04 stsp 				    &imsg);
2134 36c7cfbb 2022-11-04 stsp 			else if (do_ref_updates)
2135 36c7cfbb 2022-11-04 stsp 				err = begin_ref_updates(client, &imsg);
2136 36c7cfbb 2022-11-04 stsp 			else if (do_ref_update)
2137 eec68231 2022-12-14 stsp 				err = update_ref(client, proc->repo_path,
2138 36c7cfbb 2022-11-04 stsp 				    &imsg);
2139 36c7cfbb 2022-11-04 stsp 			if (err)
2140 36c7cfbb 2022-11-04 stsp 				log_warnx("uid %d: %s", client->euid, err->msg);
2141 36c7cfbb 2022-11-04 stsp 		}
2142 13b2bc37 2022-10-23 stsp 		imsg_free(&imsg);
2143 13b2bc37 2022-10-23 stsp 	}
2144 13b2bc37 2022-10-23 stsp done:
2145 13b2bc37 2022-10-23 stsp 	if (!shut) {
2146 13b2bc37 2022-10-23 stsp 		gotd_imsg_event_add(iev);
2147 13b2bc37 2022-10-23 stsp 	} else {
2148 13b2bc37 2022-10-23 stsp 		/* This pipe is dead. Remove its event handler */
2149 13b2bc37 2022-10-23 stsp 		event_del(&iev->ev);
2150 13b2bc37 2022-10-23 stsp 		event_loopexit(NULL);
2151 13b2bc37 2022-10-23 stsp 	}
2152 13b2bc37 2022-10-23 stsp }
2153 13b2bc37 2022-10-23 stsp 
2154 13b2bc37 2022-10-23 stsp static pid_t
2155 eec68231 2022-12-14 stsp start_child(enum gotd_procid proc_id, const char *repo_path,
2156 585362fd 2022-10-31 op     char *argv0, const char *confpath, int fd, int daemonize, int verbosity)
2157 13b2bc37 2022-10-23 stsp {
2158 585362fd 2022-10-31 op 	char	*argv[11];
2159 13b2bc37 2022-10-23 stsp 	int	 argc = 0;
2160 13b2bc37 2022-10-23 stsp 	pid_t	 pid;
2161 13b2bc37 2022-10-23 stsp 
2162 13b2bc37 2022-10-23 stsp 	switch (pid = fork()) {
2163 13b2bc37 2022-10-23 stsp 	case -1:
2164 13b2bc37 2022-10-23 stsp 		fatal("cannot fork");
2165 13b2bc37 2022-10-23 stsp 	case 0:
2166 13b2bc37 2022-10-23 stsp 		break;
2167 13b2bc37 2022-10-23 stsp 	default:
2168 13b2bc37 2022-10-23 stsp 		close(fd);
2169 13b2bc37 2022-10-23 stsp 		return pid;
2170 13b2bc37 2022-10-23 stsp 	}
2171 13b2bc37 2022-10-23 stsp 
2172 8c6fc146 2022-11-17 stsp 	if (fd != GOTD_FILENO_MSG_PIPE) {
2173 8c6fc146 2022-11-17 stsp 		if (dup2(fd, GOTD_FILENO_MSG_PIPE) == -1)
2174 13b2bc37 2022-10-23 stsp 			fatal("cannot setup imsg fd");
2175 13b2bc37 2022-10-23 stsp 	} else if (fcntl(fd, F_SETFD, 0) == -1)
2176 13b2bc37 2022-10-23 stsp 		fatal("cannot setup imsg fd");
2177 13b2bc37 2022-10-23 stsp 
2178 13b2bc37 2022-10-23 stsp 	argv[argc++] = argv0;
2179 13b2bc37 2022-10-23 stsp 	switch (proc_id) {
2180 d93ecf7d 2022-12-14 stsp 	case PROC_LISTEN:
2181 d93ecf7d 2022-12-14 stsp 		argv[argc++] = (char *)"-L";
2182 d93ecf7d 2022-12-14 stsp 		break;
2183 5e25db14 2022-12-29 stsp 	case PROC_AUTH:
2184 5e25db14 2022-12-29 stsp 		argv[argc++] = (char *)"-A";
2185 5e25db14 2022-12-29 stsp 		break;
2186 13b2bc37 2022-10-23 stsp 	case PROC_REPO_READ:
2187 13b2bc37 2022-10-23 stsp 		argv[argc++] = (char *)"-R";
2188 13b2bc37 2022-10-23 stsp 		break;
2189 13b2bc37 2022-10-23 stsp 	case PROC_REPO_WRITE:
2190 13b2bc37 2022-10-23 stsp 		argv[argc++] = (char *)"-W";
2191 13b2bc37 2022-10-23 stsp 		break;
2192 13b2bc37 2022-10-23 stsp 	default:
2193 13b2bc37 2022-10-23 stsp 		fatalx("invalid process id %d", proc_id);
2194 13b2bc37 2022-10-23 stsp 	}
2195 13b2bc37 2022-10-23 stsp 
2196 585362fd 2022-10-31 op 	argv[argc++] = (char *)"-f";
2197 585362fd 2022-10-31 op 	argv[argc++] = (char *)confpath;
2198 585362fd 2022-10-31 op 
2199 eec68231 2022-12-14 stsp 	if (repo_path) {
2200 d93ecf7d 2022-12-14 stsp 		argv[argc++] = (char *)"-P";
2201 eec68231 2022-12-14 stsp 		argv[argc++] = (char *)repo_path;
2202 d93ecf7d 2022-12-14 stsp 	}
2203 13b2bc37 2022-10-23 stsp 
2204 13b2bc37 2022-10-23 stsp 	if (!daemonize)
2205 13b2bc37 2022-10-23 stsp 		argv[argc++] = (char *)"-d";
2206 13b2bc37 2022-10-23 stsp 	if (verbosity > 0)
2207 13b2bc37 2022-10-23 stsp 		argv[argc++] = (char *)"-v";
2208 13b2bc37 2022-10-23 stsp 	if (verbosity > 1)
2209 13b2bc37 2022-10-23 stsp 		argv[argc++] = (char *)"-v";
2210 13b2bc37 2022-10-23 stsp 	argv[argc++] = NULL;
2211 13b2bc37 2022-10-23 stsp 
2212 13b2bc37 2022-10-23 stsp 	execvp(argv0, argv);
2213 13b2bc37 2022-10-23 stsp 	fatal("execvp");
2214 13b2bc37 2022-10-23 stsp }
2215 13b2bc37 2022-10-23 stsp 
2216 13b2bc37 2022-10-23 stsp static void
2217 d93ecf7d 2022-12-14 stsp start_listener(char *argv0, const char *confpath, int daemonize, int verbosity)
2218 d93ecf7d 2022-12-14 stsp {
2219 b50a2b46 2022-12-29 stsp 	struct gotd_child_proc *proc = &gotd.listen_proc;
2220 d93ecf7d 2022-12-14 stsp 
2221 d93ecf7d 2022-12-14 stsp 	proc->type = PROC_LISTEN;
2222 d93ecf7d 2022-12-14 stsp 
2223 d93ecf7d 2022-12-14 stsp 	if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
2224 d93ecf7d 2022-12-14 stsp 	    PF_UNSPEC, proc->pipe) == -1)
2225 d93ecf7d 2022-12-14 stsp 		fatal("socketpair");
2226 d93ecf7d 2022-12-14 stsp 
2227 d93ecf7d 2022-12-14 stsp 	proc->pid = start_child(proc->type, NULL, argv0, confpath,
2228 d93ecf7d 2022-12-14 stsp 	    proc->pipe[1], daemonize, verbosity);
2229 d93ecf7d 2022-12-14 stsp 	imsg_init(&proc->iev.ibuf, proc->pipe[0]);
2230 b50a2b46 2022-12-29 stsp 	proc->iev.handler = gotd_dispatch_listener;
2231 d93ecf7d 2022-12-14 stsp 	proc->iev.events = EV_READ;
2232 d93ecf7d 2022-12-14 stsp 	proc->iev.handler_arg = NULL;
2233 d93ecf7d 2022-12-14 stsp }
2234 d93ecf7d 2022-12-14 stsp 
2235 b50a2b46 2022-12-29 stsp static const struct got_error *
2236 b50a2b46 2022-12-29 stsp start_repo_child(struct gotd_client *client, enum gotd_procid proc_type,
2237 b50a2b46 2022-12-29 stsp     struct gotd_repo *repo, char *argv0, const char *confpath,
2238 585362fd 2022-10-31 op     int daemonize, int verbosity)
2239 13b2bc37 2022-10-23 stsp {
2240 13b2bc37 2022-10-23 stsp 	struct gotd_child_proc *proc;
2241 13b2bc37 2022-10-23 stsp 
2242 b50a2b46 2022-12-29 stsp 	if (proc_type != PROC_REPO_READ && proc_type != PROC_REPO_WRITE)
2243 b50a2b46 2022-12-29 stsp 		return got_error_msg(GOT_ERR_NOT_IMPL, "bad process type");
2244 7fdc3e58 2022-12-30 mark 
2245 b50a2b46 2022-12-29 stsp 	proc = calloc(1, sizeof(*proc));
2246 b50a2b46 2022-12-29 stsp 	if (proc == NULL)
2247 b50a2b46 2022-12-29 stsp 		return got_error_from_errno("calloc");
2248 13b2bc37 2022-10-23 stsp 
2249 b50a2b46 2022-12-29 stsp 	proc->type = proc_type;
2250 b50a2b46 2022-12-29 stsp 	if (strlcpy(proc->repo_name, repo->name,
2251 b50a2b46 2022-12-29 stsp 	    sizeof(proc->repo_name)) >= sizeof(proc->repo_name))
2252 b50a2b46 2022-12-29 stsp 		fatalx("repository name too long: %s", repo->name);
2253 b50a2b46 2022-12-29 stsp 	log_debug("starting %s for repository %s",
2254 b50a2b46 2022-12-29 stsp 	    proc->type == PROC_REPO_READ ? "reader" : "writer", repo->name);
2255 b50a2b46 2022-12-29 stsp 	if (realpath(repo->path, proc->repo_path) == NULL)
2256 b50a2b46 2022-12-29 stsp 		fatal("%s", repo->path);
2257 b50a2b46 2022-12-29 stsp 	if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
2258 b50a2b46 2022-12-29 stsp 	    PF_UNSPEC, proc->pipe) == -1)
2259 b50a2b46 2022-12-29 stsp 		fatal("socketpair");
2260 b50a2b46 2022-12-29 stsp 	proc->pid = start_child(proc->type, proc->repo_path, argv0,
2261 b50a2b46 2022-12-29 stsp 	    confpath, proc->pipe[1], daemonize, verbosity);
2262 b50a2b46 2022-12-29 stsp 	imsg_init(&proc->iev.ibuf, proc->pipe[0]);
2263 b50a2b46 2022-12-29 stsp 	log_debug("proc %s %s is on fd %d",
2264 b50a2b46 2022-12-29 stsp 	    gotd_proc_names[proc->type], proc->repo_path,
2265 b50a2b46 2022-12-29 stsp 	    proc->pipe[0]);
2266 b50a2b46 2022-12-29 stsp 	proc->iev.handler = gotd_dispatch_repo_child;
2267 b50a2b46 2022-12-29 stsp 	proc->iev.events = EV_READ;
2268 b50a2b46 2022-12-29 stsp 	proc->iev.handler_arg = NULL;
2269 b50a2b46 2022-12-29 stsp 	event_set(&proc->iev.ev, proc->iev.ibuf.fd, EV_READ,
2270 b50a2b46 2022-12-29 stsp 	    gotd_dispatch_repo_child, &proc->iev);
2271 b50a2b46 2022-12-29 stsp 	gotd_imsg_event_add(&proc->iev);
2272 b50a2b46 2022-12-29 stsp 
2273 b50a2b46 2022-12-29 stsp 	if (proc->type == PROC_REPO_READ)
2274 b50a2b46 2022-12-29 stsp 		client->repo_read = proc;
2275 b50a2b46 2022-12-29 stsp 	else
2276 b50a2b46 2022-12-29 stsp 		client->repo_write = proc;
2277 5e25db14 2022-12-29 stsp 
2278 5e25db14 2022-12-29 stsp 	return NULL;
2279 5e25db14 2022-12-29 stsp }
2280 5e25db14 2022-12-29 stsp 
2281 5e25db14 2022-12-29 stsp static const struct got_error *
2282 5e25db14 2022-12-29 stsp start_auth_child(struct gotd_client *client, int required_auth,
2283 5e25db14 2022-12-29 stsp     struct gotd_repo *repo, char *argv0, const char *confpath,
2284 5e25db14 2022-12-29 stsp     int daemonize, int verbosity)
2285 5e25db14 2022-12-29 stsp {
2286 365cf0f3 2022-12-29 stsp 	const struct got_error *err = NULL;
2287 5e25db14 2022-12-29 stsp 	struct gotd_child_proc *proc;
2288 5e25db14 2022-12-29 stsp 	struct gotd_imsg_auth iauth;
2289 365cf0f3 2022-12-29 stsp 	int fd;
2290 5e25db14 2022-12-29 stsp 
2291 5e25db14 2022-12-29 stsp 	memset(&iauth, 0, sizeof(iauth));
2292 365cf0f3 2022-12-29 stsp 
2293 365cf0f3 2022-12-29 stsp 	fd = dup(client->fd);
2294 365cf0f3 2022-12-29 stsp 	if (fd == -1)
2295 365cf0f3 2022-12-29 stsp 		return got_error_from_errno("dup");
2296 5e25db14 2022-12-29 stsp 
2297 5e25db14 2022-12-29 stsp 	proc = calloc(1, sizeof(*proc));
2298 365cf0f3 2022-12-29 stsp 	if (proc == NULL) {
2299 365cf0f3 2022-12-29 stsp 		err = got_error_from_errno("calloc");
2300 365cf0f3 2022-12-29 stsp 		close(fd);
2301 365cf0f3 2022-12-29 stsp 		return err;
2302 365cf0f3 2022-12-29 stsp 	}
2303 5e25db14 2022-12-29 stsp 
2304 5e25db14 2022-12-29 stsp 	proc->type = PROC_AUTH;
2305 5e25db14 2022-12-29 stsp 	if (strlcpy(proc->repo_name, repo->name,
2306 5e25db14 2022-12-29 stsp 	    sizeof(proc->repo_name)) >= sizeof(proc->repo_name))
2307 5e25db14 2022-12-29 stsp 		fatalx("repository name too long: %s", repo->name);
2308 5e25db14 2022-12-29 stsp 	log_debug("starting auth for uid %d repository %s",
2309 5e25db14 2022-12-29 stsp 	    client->euid, repo->name);
2310 5e25db14 2022-12-29 stsp 	if (realpath(repo->path, proc->repo_path) == NULL)
2311 5e25db14 2022-12-29 stsp 		fatal("%s", repo->path);
2312 5e25db14 2022-12-29 stsp 	if (socketpair(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK,
2313 5e25db14 2022-12-29 stsp 	    PF_UNSPEC, proc->pipe) == -1)
2314 5e25db14 2022-12-29 stsp 		fatal("socketpair");
2315 5e25db14 2022-12-29 stsp 	proc->pid = start_child(proc->type, proc->repo_path, argv0,
2316 5e25db14 2022-12-29 stsp 	    confpath, proc->pipe[1], daemonize, verbosity);
2317 5e25db14 2022-12-29 stsp 	imsg_init(&proc->iev.ibuf, proc->pipe[0]);
2318 5e25db14 2022-12-29 stsp 	log_debug("proc %s %s is on fd %d",
2319 5e25db14 2022-12-29 stsp 	    gotd_proc_names[proc->type], proc->repo_path,
2320 5e25db14 2022-12-29 stsp 	    proc->pipe[0]);
2321 5e25db14 2022-12-29 stsp 	proc->iev.handler = gotd_dispatch_auth_child;
2322 5e25db14 2022-12-29 stsp 	proc->iev.events = EV_READ;
2323 5e25db14 2022-12-29 stsp 	proc->iev.handler_arg = NULL;
2324 5e25db14 2022-12-29 stsp 	event_set(&proc->iev.ev, proc->iev.ibuf.fd, EV_READ,
2325 5e25db14 2022-12-29 stsp 	    gotd_dispatch_auth_child, &proc->iev);
2326 5e25db14 2022-12-29 stsp 	gotd_imsg_event_add(&proc->iev);
2327 5e25db14 2022-12-29 stsp 
2328 5e25db14 2022-12-29 stsp 	iauth.euid = client->euid;
2329 5e25db14 2022-12-29 stsp 	iauth.egid = client->egid;
2330 5e25db14 2022-12-29 stsp 	iauth.required_auth = required_auth;
2331 5e25db14 2022-12-29 stsp 	iauth.client_id = client->id;
2332 5e25db14 2022-12-29 stsp 	if (gotd_imsg_compose_event(&proc->iev, GOTD_IMSG_AUTHENTICATE,
2333 365cf0f3 2022-12-29 stsp 	    PROC_GOTD, fd, &iauth, sizeof(iauth)) == -1) {
2334 5e25db14 2022-12-29 stsp 		log_warn("imsg compose AUTHENTICATE");
2335 365cf0f3 2022-12-29 stsp 		close(fd);
2336 365cf0f3 2022-12-29 stsp 		/* Let the auth_timeout handler tidy up. */
2337 365cf0f3 2022-12-29 stsp 	}
2338 b50a2b46 2022-12-29 stsp 
2339 5e25db14 2022-12-29 stsp 	client->auth = proc;
2340 5e25db14 2022-12-29 stsp 	client->required_auth = required_auth;
2341 b50a2b46 2022-12-29 stsp 	return NULL;
2342 eec68231 2022-12-14 stsp }
2343 eec68231 2022-12-14 stsp 
2344 eec68231 2022-12-14 stsp static void
2345 eec68231 2022-12-14 stsp apply_unveil_repo_readonly(const char *repo_path)
2346 eec68231 2022-12-14 stsp {
2347 eec68231 2022-12-14 stsp 	if (unveil(repo_path, "r") == -1)
2348 eec68231 2022-12-14 stsp 		fatal("unveil %s", repo_path);
2349 44587340 2022-12-30 stsp 
2350 44587340 2022-12-30 stsp 	if (unveil(NULL, NULL) == -1)
2351 44587340 2022-12-30 stsp 		fatal("unveil");
2352 44587340 2022-12-30 stsp }
2353 44587340 2022-12-30 stsp 
2354 44587340 2022-12-30 stsp static void
2355 44587340 2022-12-30 stsp apply_unveil_none(void)
2356 44587340 2022-12-30 stsp {
2357 44587340 2022-12-30 stsp 	if (unveil("/", "") == -1)
2358 44587340 2022-12-30 stsp 		fatal("unveil");
2359 eec68231 2022-12-14 stsp 
2360 eec68231 2022-12-14 stsp 	if (unveil(NULL, NULL) == -1)
2361 eec68231 2022-12-14 stsp 		fatal("unveil");
2362 13b2bc37 2022-10-23 stsp }
2363 13b2bc37 2022-10-23 stsp 
2364 13b2bc37 2022-10-23 stsp static void
2365 13b2bc37 2022-10-23 stsp apply_unveil(void)
2366 13b2bc37 2022-10-23 stsp {
2367 13b2bc37 2022-10-23 stsp 	struct gotd_repo *repo;
2368 13b2bc37 2022-10-23 stsp 
2369 b50a2b46 2022-12-29 stsp 	if (unveil(gotd.argv0, "x") == -1)
2370 b50a2b46 2022-12-29 stsp 		fatal("unveil %s", gotd.argv0);
2371 b50a2b46 2022-12-29 stsp 
2372 13b2bc37 2022-10-23 stsp 	TAILQ_FOREACH(repo, &gotd.repos, entry) {
2373 13b2bc37 2022-10-23 stsp 		if (unveil(repo->path, "rwc") == -1)
2374 13b2bc37 2022-10-23 stsp 			fatal("unveil %s", repo->path);
2375 13b2bc37 2022-10-23 stsp 	}
2376 13b2bc37 2022-10-23 stsp 
2377 13b2bc37 2022-10-23 stsp 	if (unveil(GOT_TMPDIR_STR, "rwc") == -1)
2378 13b2bc37 2022-10-23 stsp 		fatal("unveil %s", GOT_TMPDIR_STR);
2379 13b2bc37 2022-10-23 stsp 
2380 13b2bc37 2022-10-23 stsp 	if (unveil(NULL, NULL) == -1)
2381 13b2bc37 2022-10-23 stsp 		fatal("unveil");
2382 13b2bc37 2022-10-23 stsp }
2383 13b2bc37 2022-10-23 stsp 
2384 13b2bc37 2022-10-23 stsp int
2385 13b2bc37 2022-10-23 stsp main(int argc, char **argv)
2386 13b2bc37 2022-10-23 stsp {
2387 13b2bc37 2022-10-23 stsp 	const struct got_error *error = NULL;
2388 13b2bc37 2022-10-23 stsp 	int ch, fd = -1, daemonize = 1, verbosity = 0, noaction = 0;
2389 13b2bc37 2022-10-23 stsp 	const char *confpath = GOTD_CONF_PATH;
2390 13b2bc37 2022-10-23 stsp 	char *argv0 = argv[0];
2391 13b2bc37 2022-10-23 stsp 	char title[2048];
2392 13b2bc37 2022-10-23 stsp 	struct passwd *pw = NULL;
2393 13b2bc37 2022-10-23 stsp 	char *repo_path = NULL;
2394 13b2bc37 2022-10-23 stsp 	enum gotd_procid proc_id = PROC_GOTD;
2395 13b2bc37 2022-10-23 stsp 	struct event evsigint, evsigterm, evsighup, evsigusr1;
2396 13b2bc37 2022-10-23 stsp 	int *pack_fds = NULL, *temp_fds = NULL;
2397 13b2bc37 2022-10-23 stsp 
2398 13b2bc37 2022-10-23 stsp 	log_init(1, LOG_DAEMON); /* Log to stderr until daemonized. */
2399 13b2bc37 2022-10-23 stsp 
2400 5e25db14 2022-12-29 stsp 	while ((ch = getopt(argc, argv, "Adf:LnP:RvW")) != -1) {
2401 13b2bc37 2022-10-23 stsp 		switch (ch) {
2402 5e25db14 2022-12-29 stsp 		case 'A':
2403 5e25db14 2022-12-29 stsp 			proc_id = PROC_AUTH;
2404 5e25db14 2022-12-29 stsp 			break;
2405 13b2bc37 2022-10-23 stsp 		case 'd':
2406 13b2bc37 2022-10-23 stsp 			daemonize = 0;
2407 13b2bc37 2022-10-23 stsp 			break;
2408 13b2bc37 2022-10-23 stsp 		case 'f':
2409 13b2bc37 2022-10-23 stsp 			confpath = optarg;
2410 13b2bc37 2022-10-23 stsp 			break;
2411 d93ecf7d 2022-12-14 stsp 		case 'L':
2412 d93ecf7d 2022-12-14 stsp 			proc_id = PROC_LISTEN;
2413 d93ecf7d 2022-12-14 stsp 			break;
2414 13b2bc37 2022-10-23 stsp 		case 'n':
2415 13b2bc37 2022-10-23 stsp 			noaction = 1;
2416 13b2bc37 2022-10-23 stsp 			break;
2417 6f319063 2022-10-27 stsp 		case 'P':
2418 6f319063 2022-10-27 stsp 			repo_path = realpath(optarg, NULL);
2419 6f319063 2022-10-27 stsp 			if (repo_path == NULL)
2420 6f319063 2022-10-27 stsp 				fatal("realpath '%s'", optarg);
2421 13b2bc37 2022-10-23 stsp 			break;
2422 13b2bc37 2022-10-23 stsp 		case 'R':
2423 13b2bc37 2022-10-23 stsp 			proc_id = PROC_REPO_READ;
2424 13b2bc37 2022-10-23 stsp 			break;
2425 6f319063 2022-10-27 stsp 		case 'v':
2426 6f319063 2022-10-27 stsp 			if (verbosity < 3)
2427 6f319063 2022-10-27 stsp 				verbosity++;
2428 6f319063 2022-10-27 stsp 			break;
2429 13b2bc37 2022-10-23 stsp 		case 'W':
2430 13b2bc37 2022-10-23 stsp 			proc_id = PROC_REPO_WRITE;
2431 13b2bc37 2022-10-23 stsp 			break;
2432 13b2bc37 2022-10-23 stsp 		default:
2433 13b2bc37 2022-10-23 stsp 			usage();
2434 13b2bc37 2022-10-23 stsp 		}
2435 13b2bc37 2022-10-23 stsp 	}
2436 13b2bc37 2022-10-23 stsp 
2437 13b2bc37 2022-10-23 stsp 	argc -= optind;
2438 13b2bc37 2022-10-23 stsp 	argv += optind;
2439 13b2bc37 2022-10-23 stsp 
2440 13b2bc37 2022-10-23 stsp 	if (argc != 0)
2441 13b2bc37 2022-10-23 stsp 		usage();
2442 13b2bc37 2022-10-23 stsp 
2443 b50a2b46 2022-12-29 stsp 	/* Require an absolute path in argv[0] for reliable re-exec. */
2444 b50a2b46 2022-12-29 stsp 	if (!got_path_is_absolute(argv0))
2445 b50a2b46 2022-12-29 stsp 		fatalx("bad path \"%s\": must be an absolute path", argv0);
2446 b50a2b46 2022-12-29 stsp 
2447 b50a2b46 2022-12-29 stsp 	if (geteuid() && (proc_id == PROC_GOTD || proc_id == PROC_LISTEN))
2448 13b2bc37 2022-10-23 stsp 		fatalx("need root privileges");
2449 13b2bc37 2022-10-23 stsp 
2450 13b2bc37 2022-10-23 stsp 	log_init(daemonize ? 0 : 1, LOG_DAEMON);
2451 13b2bc37 2022-10-23 stsp 	log_setverbose(verbosity);
2452 13b2bc37 2022-10-23 stsp 
2453 13b2bc37 2022-10-23 stsp 	if (parse_config(confpath, proc_id, &gotd) != 0)
2454 13b2bc37 2022-10-23 stsp 		return 1;
2455 13b2bc37 2022-10-23 stsp 
2456 b50a2b46 2022-12-29 stsp 	gotd.argv0 = argv0;
2457 b50a2b46 2022-12-29 stsp 	gotd.daemonize = daemonize;
2458 b50a2b46 2022-12-29 stsp 	gotd.verbosity = verbosity;
2459 b50a2b46 2022-12-29 stsp 	gotd.confpath = confpath;
2460 b50a2b46 2022-12-29 stsp 
2461 13b2bc37 2022-10-23 stsp 	if (proc_id == PROC_GOTD &&
2462 13b2bc37 2022-10-23 stsp 	    (gotd.nrepos == 0 || TAILQ_EMPTY(&gotd.repos)))
2463 13b2bc37 2022-10-23 stsp 		fatalx("no repository defined in configuration file");
2464 13b2bc37 2022-10-23 stsp 
2465 13b2bc37 2022-10-23 stsp 	pw = getpwnam(gotd.user_name);
2466 13b2bc37 2022-10-23 stsp 	if (pw == NULL)
2467 898c8f8f 2022-12-29 op 		fatalx("user %s not found", gotd.user_name);
2468 13b2bc37 2022-10-23 stsp 
2469 13b2bc37 2022-10-23 stsp 	if (pw->pw_uid == 0) {
2470 13b2bc37 2022-10-23 stsp 		fatalx("cannot run %s as %s: the user running %s "
2471 13b2bc37 2022-10-23 stsp 		    "must not be the superuser",
2472 13b2bc37 2022-10-23 stsp 		    getprogname(), pw->pw_name, getprogname());
2473 13b2bc37 2022-10-23 stsp 	}
2474 13b2bc37 2022-10-23 stsp 
2475 d93ecf7d 2022-12-14 stsp 	if (proc_id == PROC_LISTEN &&
2476 13b2bc37 2022-10-23 stsp 	    !got_path_is_absolute(gotd.unix_socket_path))
2477 13b2bc37 2022-10-23 stsp 		fatalx("bad unix socket path \"%s\": must be an absolute path",
2478 13b2bc37 2022-10-23 stsp 		    gotd.unix_socket_path);
2479 13b2bc37 2022-10-23 stsp 
2480 13b2bc37 2022-10-23 stsp 	if (noaction)
2481 13b2bc37 2022-10-23 stsp 		return 0;
2482 13b2bc37 2022-10-23 stsp 
2483 b1142068 2022-12-05 stsp 	if (proc_id == PROC_GOTD) {
2484 d93ecf7d 2022-12-14 stsp 		gotd.pid = getpid();
2485 d93ecf7d 2022-12-14 stsp 		snprintf(title, sizeof(title), "%s", gotd_proc_names[proc_id]);
2486 d93ecf7d 2022-12-14 stsp 		start_listener(argv0, confpath, daemonize, verbosity);
2487 d93ecf7d 2022-12-14 stsp 		arc4random_buf(&clients_hash_key, sizeof(clients_hash_key));
2488 d93ecf7d 2022-12-14 stsp 		if (daemonize && daemon(1, 0) == -1)
2489 d93ecf7d 2022-12-14 stsp 			fatal("daemon");
2490 d93ecf7d 2022-12-14 stsp 	} else if (proc_id == PROC_LISTEN) {
2491 d93ecf7d 2022-12-14 stsp 		snprintf(title, sizeof(title), "%s", gotd_proc_names[proc_id]);
2492 b1142068 2022-12-05 stsp 		if (verbosity) {
2493 b1142068 2022-12-05 stsp 			log_info("socket: %s", gotd.unix_socket_path);
2494 b1142068 2022-12-05 stsp 			log_info("user: %s", pw->pw_name);
2495 b1142068 2022-12-05 stsp 		}
2496 13b2bc37 2022-10-23 stsp 
2497 13b2bc37 2022-10-23 stsp 		fd = unix_socket_listen(gotd.unix_socket_path, pw->pw_uid,
2498 6f854dde 2023-01-04 stsp 		    pw->pw_gid);
2499 13b2bc37 2022-10-23 stsp 		if (fd == -1) {
2500 13b2bc37 2022-10-23 stsp 			fatal("cannot listen on unix socket %s",
2501 13b2bc37 2022-10-23 stsp 			    gotd.unix_socket_path);
2502 13b2bc37 2022-10-23 stsp 		}
2503 eec68231 2022-12-14 stsp 		if (daemonize && daemon(0, 0) == -1)
2504 13b2bc37 2022-10-23 stsp 			fatal("daemon");
2505 5e25db14 2022-12-29 stsp 	} else if (proc_id == PROC_AUTH) {
2506 5e25db14 2022-12-29 stsp 		snprintf(title, sizeof(title), "%s %s",
2507 5e25db14 2022-12-29 stsp 		    gotd_proc_names[proc_id], repo_path);
2508 5e25db14 2022-12-29 stsp 		if (daemonize && daemon(0, 0) == -1)
2509 5e25db14 2022-12-29 stsp 			fatal("daemon");
2510 13b2bc37 2022-10-23 stsp 	} else if (proc_id == PROC_REPO_READ || proc_id == PROC_REPO_WRITE) {
2511 13b2bc37 2022-10-23 stsp 		error = got_repo_pack_fds_open(&pack_fds);
2512 13b2bc37 2022-10-23 stsp 		if (error != NULL)
2513 13b2bc37 2022-10-23 stsp 			fatalx("cannot open pack tempfiles: %s", error->msg);
2514 13b2bc37 2022-10-23 stsp 		error = got_repo_temp_fds_open(&temp_fds);
2515 13b2bc37 2022-10-23 stsp 		if (error != NULL)
2516 13b2bc37 2022-10-23 stsp 			fatalx("cannot open pack tempfiles: %s", error->msg);
2517 13b2bc37 2022-10-23 stsp 		if (repo_path == NULL)
2518 13b2bc37 2022-10-23 stsp 			fatalx("repository path not specified");
2519 13b2bc37 2022-10-23 stsp 		snprintf(title, sizeof(title), "%s %s",
2520 13b2bc37 2022-10-23 stsp 		    gotd_proc_names[proc_id], repo_path);
2521 eec68231 2022-12-14 stsp 		if (daemonize && daemon(0, 0) == -1)
2522 13b2bc37 2022-10-23 stsp 			fatal("daemon");
2523 13b2bc37 2022-10-23 stsp 	} else
2524 13b2bc37 2022-10-23 stsp 		fatal("invalid process id %d", proc_id);
2525 13b2bc37 2022-10-23 stsp 
2526 13b2bc37 2022-10-23 stsp 	setproctitle("%s", title);
2527 13b2bc37 2022-10-23 stsp 	log_procinit(title);
2528 13b2bc37 2022-10-23 stsp 
2529 13b2bc37 2022-10-23 stsp 	/* Drop root privileges. */
2530 13b2bc37 2022-10-23 stsp 	if (setgid(pw->pw_gid) == -1)
2531 13b2bc37 2022-10-23 stsp 		fatal("setgid %d failed", pw->pw_gid);
2532 13b2bc37 2022-10-23 stsp 	if (setuid(pw->pw_uid) == -1)
2533 13b2bc37 2022-10-23 stsp 		fatal("setuid %d failed", pw->pw_uid);
2534 13b2bc37 2022-10-23 stsp 
2535 13b2bc37 2022-10-23 stsp 	event_init();
2536 13b2bc37 2022-10-23 stsp 
2537 13b2bc37 2022-10-23 stsp 	switch (proc_id) {
2538 13b2bc37 2022-10-23 stsp 	case PROC_GOTD:
2539 13b2bc37 2022-10-23 stsp #ifndef PROFILE
2540 5e25db14 2022-12-29 stsp 		if (pledge("stdio rpath wpath cpath proc exec "
2541 365cf0f3 2022-12-29 stsp 		    "sendfd recvfd fattr flock unveil", NULL) == -1)
2542 13b2bc37 2022-10-23 stsp 			err(1, "pledge");
2543 13b2bc37 2022-10-23 stsp #endif
2544 13b2bc37 2022-10-23 stsp 		break;
2545 d93ecf7d 2022-12-14 stsp 	case PROC_LISTEN:
2546 d93ecf7d 2022-12-14 stsp #ifndef PROFILE
2547 77f619a8 2023-01-04 stsp 		if (pledge("stdio sendfd unix unveil", NULL) == -1)
2548 d93ecf7d 2022-12-14 stsp 			err(1, "pledge");
2549 d93ecf7d 2022-12-14 stsp #endif
2550 77f619a8 2023-01-04 stsp 		/*
2551 77f619a8 2023-01-04 stsp 		 * Ensure that AF_UNIX bind(2) cannot be used with any other
2552 77f619a8 2023-01-04 stsp 		 * sockets by revoking all filesystem access via unveil(2).
2553 77f619a8 2023-01-04 stsp 		 */
2554 77f619a8 2023-01-04 stsp 		apply_unveil_none();
2555 77f619a8 2023-01-04 stsp 
2556 40b85cca 2023-01-03 stsp 		listen_main(title, fd, gotd.connection_limits,
2557 40b85cca 2023-01-03 stsp 		    gotd.nconnection_limits);
2558 d93ecf7d 2022-12-14 stsp 		/* NOTREACHED */
2559 d93ecf7d 2022-12-14 stsp 		break;
2560 5e25db14 2022-12-29 stsp 	case PROC_AUTH:
2561 5e25db14 2022-12-29 stsp #ifndef PROFILE
2562 44587340 2022-12-30 stsp 		if (pledge("stdio getpw recvfd unix unveil", NULL) == -1)
2563 5e25db14 2022-12-29 stsp 			err(1, "pledge");
2564 5e25db14 2022-12-29 stsp #endif
2565 44587340 2022-12-30 stsp 		/*
2566 44587340 2022-12-30 stsp 		 * We need the "unix" pledge promise for getpeername(2) only.
2567 44587340 2022-12-30 stsp 		 * Ensure that AF_UNIX bind(2) cannot be used by revoking all
2568 44587340 2022-12-30 stsp 		 * filesystem access via unveil(2). Access to password database
2569 44587340 2022-12-30 stsp 		 * files will still work since "getpw" bypasses unveil(2).
2570 44587340 2022-12-30 stsp 		 */
2571 44587340 2022-12-30 stsp 		apply_unveil_none();
2572 44587340 2022-12-30 stsp 
2573 5e25db14 2022-12-29 stsp 		auth_main(title, &gotd.repos, repo_path);
2574 5e25db14 2022-12-29 stsp 		/* NOTREACHED */
2575 5e25db14 2022-12-29 stsp 		break;
2576 13b2bc37 2022-10-23 stsp 	case PROC_REPO_READ:
2577 13b2bc37 2022-10-23 stsp #ifndef PROFILE
2578 eec68231 2022-12-14 stsp 		if (pledge("stdio rpath recvfd unveil", NULL) == -1)
2579 13b2bc37 2022-10-23 stsp 			err(1, "pledge");
2580 13b2bc37 2022-10-23 stsp #endif
2581 eec68231 2022-12-14 stsp 		apply_unveil_repo_readonly(repo_path);
2582 eec68231 2022-12-14 stsp 		repo_read_main(title, repo_path, pack_fds, temp_fds);
2583 13b2bc37 2022-10-23 stsp 		/* NOTREACHED */
2584 13b2bc37 2022-10-23 stsp 		exit(0);
2585 13b2bc37 2022-10-23 stsp 	case PROC_REPO_WRITE:
2586 13b2bc37 2022-10-23 stsp #ifndef PROFILE
2587 eec68231 2022-12-14 stsp 		if (pledge("stdio rpath recvfd unveil", NULL) == -1)
2588 13b2bc37 2022-10-23 stsp 			err(1, "pledge");
2589 13b2bc37 2022-10-23 stsp #endif
2590 eec68231 2022-12-14 stsp 		apply_unveil_repo_readonly(repo_path);
2591 eec68231 2022-12-14 stsp 		repo_write_main(title, repo_path, pack_fds, temp_fds);
2592 13b2bc37 2022-10-23 stsp 		/* NOTREACHED */
2593 13b2bc37 2022-10-23 stsp 		exit(0);
2594 13b2bc37 2022-10-23 stsp 	default:
2595 13b2bc37 2022-10-23 stsp 		fatal("invalid process id %d", proc_id);
2596 13b2bc37 2022-10-23 stsp 	}
2597 13b2bc37 2022-10-23 stsp 
2598 13b2bc37 2022-10-23 stsp 	if (proc_id != PROC_GOTD)
2599 13b2bc37 2022-10-23 stsp 		fatal("invalid process id %d", proc_id);
2600 13b2bc37 2022-10-23 stsp 
2601 13b2bc37 2022-10-23 stsp 	apply_unveil();
2602 13b2bc37 2022-10-23 stsp 
2603 13b2bc37 2022-10-23 stsp 	signal_set(&evsigint, SIGINT, gotd_sighdlr, NULL);
2604 13b2bc37 2022-10-23 stsp 	signal_set(&evsigterm, SIGTERM, gotd_sighdlr, NULL);
2605 13b2bc37 2022-10-23 stsp 	signal_set(&evsighup, SIGHUP, gotd_sighdlr, NULL);
2606 13b2bc37 2022-10-23 stsp 	signal_set(&evsigusr1, SIGUSR1, gotd_sighdlr, NULL);
2607 13b2bc37 2022-10-23 stsp 	signal(SIGPIPE, SIG_IGN);
2608 13b2bc37 2022-10-23 stsp 
2609 13b2bc37 2022-10-23 stsp 	signal_add(&evsigint, NULL);
2610 13b2bc37 2022-10-23 stsp 	signal_add(&evsigterm, NULL);
2611 13b2bc37 2022-10-23 stsp 	signal_add(&evsighup, NULL);
2612 13b2bc37 2022-10-23 stsp 	signal_add(&evsigusr1, NULL);
2613 13b2bc37 2022-10-23 stsp 
2614 b50a2b46 2022-12-29 stsp 	gotd_imsg_event_add(&gotd.listen_proc.iev);
2615 13b2bc37 2022-10-23 stsp 
2616 13b2bc37 2022-10-23 stsp 	event_dispatch();
2617 13b2bc37 2022-10-23 stsp 
2618 13b2bc37 2022-10-23 stsp 	if (pack_fds)
2619 13b2bc37 2022-10-23 stsp 		got_repo_pack_fds_close(pack_fds);
2620 13b2bc37 2022-10-23 stsp 	free(repo_path);
2621 13b2bc37 2022-10-23 stsp 	return 0;
2622 13b2bc37 2022-10-23 stsp }