2 * Copyright (c) 2018, 2019 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>
34 #include "got_error.h"
35 #include "got_object.h"
37 #include "got_lib_delta.h"
38 #include "got_lib_hash.h"
39 #include "got_lib_inflate.h"
40 #include "got_lib_object.h"
41 #include "got_lib_object_parse.h"
42 #include "got_lib_privsep.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;
59 signal(SIGINT, catch_sigint);
61 imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
64 /* revoke access to most system calls */
65 if (pledge("stdio recvfd", NULL) == -1) {
66 err = got_error_from_errno("pledge");
67 got_privsep_send_error(&ibuf, err);
73 struct imsg imsg, imsg_outfd;
75 int fd = -1, outfd = -1;
77 struct got_object *obj = NULL;
79 struct got_object_id id;
80 struct got_object_id expected_id;
81 struct got_inflate_checksum csum;
84 got_hash_init(&ctx, GOT_HASH_SHA1);
85 memset(&csum, 0, sizeof(csum));
86 csum.output_ctx = &ctx;
88 memset(&imsg, 0, sizeof(imsg));
89 memset(&imsg_outfd, 0, sizeof(imsg_outfd));
91 if (sigint_received) {
92 err = got_error(GOT_ERR_CANCELLED);
96 err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
98 if (err->code == GOT_ERR_PRIVSEP_PIPE)
103 if (imsg.hdr.type == GOT_IMSG_STOP)
106 if (imsg.hdr.type != GOT_IMSG_BLOB_REQUEST) {
107 err = got_error(GOT_ERR_PRIVSEP_MSG);
111 datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
112 if (datalen != sizeof(expected_id)) {
113 err = got_error(GOT_ERR_PRIVSEP_LEN);
116 memcpy(&expected_id, imsg.data, sizeof(expected_id));
118 fd = imsg_get_fd(&imsg);
120 err = got_error(GOT_ERR_PRIVSEP_NO_FD);
124 err = got_privsep_recv_imsg(&imsg_outfd, &ibuf, 0);
126 if (imsg.hdr.len == 0)
131 if (imsg_outfd.hdr.type == GOT_IMSG_STOP)
134 if (imsg_outfd.hdr.type != GOT_IMSG_BLOB_OUTFD) {
135 err = got_error(GOT_ERR_PRIVSEP_MSG);
139 datalen = imsg_outfd.hdr.len - IMSG_HEADER_SIZE;
141 err = got_error(GOT_ERR_PRIVSEP_LEN);
144 outfd = imsg_get_fd(&imsg_outfd);
146 err = got_error(GOT_ERR_PRIVSEP_NO_FD);
150 err = got_object_read_header(&obj, fd);
154 if (lseek(fd, SEEK_SET, 0) == -1) {
155 err = got_error_from_errno("lseek");
159 f = fdopen(fd, "rb");
161 err = got_error_from_errno("fdopen");
166 if (obj->size + obj->hdrlen <=
167 GOT_PRIVSEP_INLINE_BLOB_DATA_MAX) {
168 err = got_inflate_to_mem(&buf, &size, NULL, &csum, f);
172 err = got_inflate_to_fd(&size, f, &csum, outfd);
176 got_hash_final_object_id(&ctx, &id);
177 if (got_object_id_cmp(&expected_id, &id) != 0) {
178 err = got_error_checksum(&expected_id);
182 if (size < obj->hdrlen) {
183 err = got_error(GOT_ERR_BAD_OBJ_HDR);
187 err = got_privsep_send_blob(&ibuf, size, obj->hdrlen, buf);
190 if (f && fclose(f) == EOF && err == NULL)
191 err = got_error_from_errno("fclose");
192 if (fd != -1 && close(fd) == -1 && err == NULL)
193 err = got_error_from_errno("close");
194 if (outfd != -1 && close(outfd) == -1 && err == NULL)
195 err = got_error_from_errno("close");
198 imsg_free(&imsg_outfd);
200 got_object_close(obj);
207 if (!sigint_received && err->code != GOT_ERR_PRIVSEP_PIPE) {
208 fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
209 got_privsep_send_error(&ibuf, err);
212 if (close(GOT_IMSG_FD_CHILD) == -1 && err == NULL)
213 err = got_error_from_errno("close");