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;
76 struct got_object *obj = NULL;
78 struct got_object_id id;
79 struct got_object_id expected_id;
80 struct got_inflate_checksum csum;
83 got_hash_init(&ctx, GOT_HASH_SHA1);
84 memset(&csum, 0, sizeof(csum));
85 csum.output_ctx = &ctx;
87 memset(&imsg, 0, sizeof(imsg));
89 memset(&imsg_outfd, 0, sizeof(imsg_outfd));
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_BLOB_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));
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 if (imsg_outfd.fd == -1) {
145 err = got_error(GOT_ERR_PRIVSEP_NO_FD);
149 err = got_object_read_header(&obj, imsg.fd);
153 if (lseek(imsg.fd, SEEK_SET, 0) == -1) {
154 err = got_error_from_errno("lseek");
158 f = fdopen(imsg.fd, "rb");
160 err = got_error_from_errno("fdopen");
164 if (obj->size + obj->hdrlen <=
165 GOT_PRIVSEP_INLINE_BLOB_DATA_MAX) {
166 err = got_inflate_to_mem(&buf, &size, NULL, &csum, f);
170 err = got_inflate_to_fd(&size, f, &csum, imsg_outfd.fd);
174 got_hash_final_object_id(&ctx, &id);
175 if (got_object_id_cmp(&expected_id, &id) != 0) {
176 err = got_error_checksum(&expected_id);
180 if (size < obj->hdrlen) {
181 err = got_error(GOT_ERR_BAD_OBJ_HDR);
185 err = got_privsep_send_blob(&ibuf, size, obj->hdrlen, buf);
189 if (fclose(f) == EOF && err == NULL)
190 err = got_error_from_errno("fclose");
191 } else if (imsg.fd != -1) {
192 if (close(imsg.fd) == -1 && err == NULL)
193 err = got_error_from_errno("close");
195 if (imsg_outfd.fd != -1) {
196 if (close(imsg_outfd.fd) == -1 && err == NULL)
197 err = got_error_from_errno("close");
201 imsg_free(&imsg_outfd);
203 got_object_close(obj);
210 if (!sigint_received && err->code != GOT_ERR_PRIVSEP_PIPE) {
211 fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
212 got_privsep_send_error(&ibuf, err);
215 if (close(GOT_IMSG_FD_CHILD) == -1 && err == NULL)
216 err = got_error_from_errno("close");