2 * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include <sys/types.h>
18 #include <sys/queue.h>
31 #include "got_compat.h"
33 #include "got_error.h"
34 #include "got_object.h"
37 #include "got_lib_delta.h"
38 #include "got_lib_inflate.h"
39 #include "got_lib_object.h"
40 #include "got_lib_object_parse.h"
41 #include "got_lib_privsep.h"
42 #include "got_lib_hash.h"
44 static volatile sig_atomic_t sigint_received;
47 catch_sigint(int signo)
53 main(int argc, char *argv[])
55 const struct got_error *err = NULL;
58 struct got_parsed_tree_entry *entries = NULL;
59 size_t nentries = 0, nentries_alloc = 0;
61 signal(SIGINT, catch_sigint);
63 imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
66 /* revoke access to most system calls */
67 if (pledge("stdio recvfd", NULL) == -1) {
68 err = got_error_from_errno("pledge");
69 got_privsep_send_error(&ibuf, err);
73 /* revoke fs access */
74 if (landlock_no_fs() == -1) {
75 err = got_error_from_errno("landlock_no_fs");
76 got_privsep_send_error(&ibuf, err);
79 if (cap_enter() == -1) {
80 err = got_error_from_errno("cap_enter");
81 got_privsep_send_error(&ibuf, err);
89 struct got_object_id expected_id;
92 if (sigint_received) {
93 err = got_error(GOT_ERR_CANCELLED);
97 err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
99 if (err->code == GOT_ERR_PRIVSEP_PIPE)
104 if (imsg.hdr.type == GOT_IMSG_STOP)
107 if (imsg.hdr.type != GOT_IMSG_TREE_REQUEST) {
108 err = got_error(GOT_ERR_PRIVSEP_MSG);
112 datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
113 if (datalen != sizeof(expected_id)) {
114 err = got_error(GOT_ERR_PRIVSEP_LEN);
117 memcpy(&expected_id, imsg.data, sizeof(expected_id));
119 fd = imsg_get_fd(&imsg);
121 err = got_error(GOT_ERR_PRIVSEP_NO_FD);
125 /* Always assume file offset zero. */
126 err = got_object_read_tree(&entries, &nentries, &nentries_alloc,
127 &buf, fd, &expected_id);
131 err = got_privsep_send_tree(&ibuf, entries, nentries);
134 if (fd != -1 && close(fd) == -1 && err == NULL)
135 err = got_error_from_errno("close");
144 if (!sigint_received && err->code != GOT_ERR_PRIVSEP_PIPE) {
145 fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
146 got_privsep_send_error(&ibuf, err);
149 if (close(GOT_IMSG_FD_CHILD) == -1 && err == NULL)
150 err = got_error_from_errno("close");