2 5aa81393 2020-01-06 stsp * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
4 ad242220 2018-09-08 stsp * Permission to use, copy, modify, and distribute this software for any
5 ad242220 2018-09-08 stsp * purpose with or without fee is hereby granted, provided that the above
6 ad242220 2018-09-08 stsp * copyright notice and this permission notice appear in all copies.
8 ad242220 2018-09-08 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 ad242220 2018-09-08 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 ad242220 2018-09-08 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 ad242220 2018-09-08 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 ad242220 2018-09-08 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 ad242220 2018-09-08 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 ad242220 2018-09-08 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 ad242220 2018-09-08 stsp #include <sys/types.h>
18 8b925c6c 2022-07-16 thomas #include <sys/queue.h>
19 ad242220 2018-09-08 stsp #include <sys/uio.h>
20 ad242220 2018-09-08 stsp #include <sys/time.h>
22 ad242220 2018-09-08 stsp #include <stdint.h>
23 12ce7a6c 2019-08-12 stsp #include <limits.h>
24 99437157 2018-11-11 stsp #include <signal.h>
25 ad242220 2018-09-08 stsp #include <stdio.h>
26 ad242220 2018-09-08 stsp #include <stdlib.h>
27 ad242220 2018-09-08 stsp #include <string.h>
28 81a12da5 2020-09-09 naddy #include <unistd.h>
29 ad242220 2018-09-08 stsp #include <zlib.h>
31 dd038bc6 2021-09-21 thomas.ad #include "got_compat.h"
33 ad242220 2018-09-08 stsp #include "got_error.h"
34 ad242220 2018-09-08 stsp #include "got_object.h"
35 3022d272 2019-11-14 stsp #include "got_path.h"
37 ad242220 2018-09-08 stsp #include "got_lib_delta.h"
38 ad242220 2018-09-08 stsp #include "got_lib_inflate.h"
39 ad242220 2018-09-08 stsp #include "got_lib_object.h"
40 ad242220 2018-09-08 stsp #include "got_lib_object_parse.h"
41 ad242220 2018-09-08 stsp #include "got_lib_privsep.h"
42 be288a59 2023-02-23 thomas #include "got_lib_hash.h"
44 99437157 2018-11-11 stsp static volatile sig_atomic_t sigint_received;
47 99437157 2018-11-11 stsp catch_sigint(int signo)
49 99437157 2018-11-11 stsp sigint_received = 1;
53 ad242220 2018-09-08 stsp main(int argc, char *argv[])
55 ad242220 2018-09-08 stsp const struct got_error *err = NULL;
56 ad242220 2018-09-08 stsp struct imsgbuf ibuf;
57 d5c81d44 2021-07-08 stsp size_t datalen;
58 c77e00b3 2022-10-18 thomas struct got_parsed_tree_entry *entries = NULL;
59 c77e00b3 2022-10-18 thomas size_t nentries = 0, nentries_alloc = 0;
61 99437157 2018-11-11 stsp signal(SIGINT, catch_sigint);
63 ad242220 2018-09-08 stsp imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
65 2ff12563 2018-09-15 stsp #ifndef PROFILE
66 ad242220 2018-09-08 stsp /* revoke access to most system calls */
67 ad242220 2018-09-08 stsp if (pledge("stdio recvfd", NULL) == -1) {
68 638f9024 2019-05-13 stsp err = got_error_from_errno("pledge");
69 ad242220 2018-09-08 stsp got_privsep_send_error(&ibuf, err);
73 97799ccd 2022-02-06 thomas /* revoke fs access */
74 97799ccd 2022-02-06 thomas if (landlock_no_fs() == -1) {
75 97799ccd 2022-02-06 thomas err = got_error_from_errno("landlock_no_fs");
76 97799ccd 2022-02-06 thomas got_privsep_send_error(&ibuf, err);
79 5d120ea8 2022-06-23 op if (cap_enter() == -1) {
80 5d120ea8 2022-06-23 op err = got_error_from_errno("cap_enter");
81 5d120ea8 2022-06-23 op got_privsep_send_error(&ibuf, err);
87 ad242220 2018-09-08 stsp struct imsg imsg;
88 3022d272 2019-11-14 stsp uint8_t *buf = NULL;
89 d5c81d44 2021-07-08 stsp struct got_object_id expected_id;
90 3d97effa 2024-01-31 thomas int fd = -1;
92 99437157 2018-11-11 stsp if (sigint_received) {
93 99437157 2018-11-11 stsp err = got_error(GOT_ERR_CANCELLED);
97 ad242220 2018-09-08 stsp err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
99 876c234b 2018-09-10 stsp if (err->code == GOT_ERR_PRIVSEP_PIPE)
100 ad242220 2018-09-08 stsp err = NULL;
104 ad242220 2018-09-08 stsp if (imsg.hdr.type == GOT_IMSG_STOP)
107 ad242220 2018-09-08 stsp if (imsg.hdr.type != GOT_IMSG_TREE_REQUEST) {
108 ad242220 2018-09-08 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
112 d5c81d44 2021-07-08 stsp datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
113 d5c81d44 2021-07-08 stsp if (datalen != sizeof(expected_id)) {
114 d5c81d44 2021-07-08 stsp err = got_error(GOT_ERR_PRIVSEP_LEN);
117 d5c81d44 2021-07-08 stsp memcpy(&expected_id, imsg.data, sizeof(expected_id));
119 3d97effa 2024-01-31 thomas fd = imsg_get_fd(&imsg);
120 3d97effa 2024-01-31 thomas if (fd == -1) {
121 ad242220 2018-09-08 stsp err = got_error(GOT_ERR_PRIVSEP_NO_FD);
125 ad242220 2018-09-08 stsp /* Always assume file offset zero. */
126 3efd8e31 2022-10-23 thomas err = got_object_read_tree(&entries, &nentries, &nentries_alloc,
127 3d97effa 2024-01-31 thomas &buf, fd, &expected_id);
131 78e7b7b8 2022-05-19 thomas err = got_privsep_send_tree(&ibuf, entries, nentries);
134 3d97effa 2024-01-31 thomas if (fd != -1 && close(fd) == -1 && err == NULL)
135 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
136 ad242220 2018-09-08 stsp imsg_free(&imsg);
141 c77e00b3 2022-10-18 thomas free(entries);
142 ad242220 2018-09-08 stsp imsg_clear(&ibuf);
144 80d5f134 2018-11-11 stsp if (!sigint_received && err->code != GOT_ERR_PRIVSEP_PIPE) {
145 80d5f134 2018-11-11 stsp fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
146 99437157 2018-11-11 stsp got_privsep_send_error(&ibuf, err);
149 08578a35 2021-01-22 stsp if (close(GOT_IMSG_FD_CHILD) == -1 && err == NULL)
150 638f9024 2019-05-13 stsp err = got_error_from_errno("close");
151 ad242220 2018-09-08 stsp return err ? 1 : 0;
