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>
21 #include <sys/syslimits.h>
34 #include "got_error.h"
35 #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"
43 static volatile sig_atomic_t sigint_received;
46 catch_sigint(int signo)
52 main(int argc, char *argv[])
54 const struct got_error *err = NULL;
58 signal(SIGINT, catch_sigint);
60 imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
63 /* revoke access to most system calls */
64 if (pledge("stdio recvfd", NULL) == -1) {
65 err = got_error_from_errno("pledge");
66 got_privsep_send_error(&ibuf, err);
72 struct imsg imsg, imsg_outfd;
75 struct got_object *obj = NULL;
78 memset(&imsg, 0, sizeof(imsg));
80 memset(&imsg_outfd, 0, sizeof(imsg_outfd));
83 if (sigint_received) {
84 err = got_error(GOT_ERR_CANCELLED);
88 err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
90 if (err->code == GOT_ERR_PRIVSEP_PIPE)
95 if (imsg.hdr.type == GOT_IMSG_STOP)
98 if (imsg.hdr.type != GOT_IMSG_BLOB_REQUEST) {
99 err = got_error(GOT_ERR_PRIVSEP_MSG);
104 err = got_error(GOT_ERR_PRIVSEP_NO_FD);
108 err = got_privsep_recv_imsg(&imsg_outfd, &ibuf, 0);
110 if (imsg.hdr.len == 0)
115 if (imsg_outfd.hdr.type == GOT_IMSG_STOP)
118 if (imsg_outfd.hdr.type != GOT_IMSG_BLOB_OUTFD) {
119 err = got_error(GOT_ERR_PRIVSEP_MSG);
123 datalen = imsg_outfd.hdr.len - IMSG_HEADER_SIZE;
125 err = got_error(GOT_ERR_PRIVSEP_LEN);
128 if (imsg_outfd.fd == -1) {
129 err = got_error(GOT_ERR_PRIVSEP_NO_FD);
133 err = got_object_read_header(&obj, imsg.fd);
137 if (lseek(imsg.fd, SEEK_SET, 0) == -1) {
138 err = got_error_from_errno("lseek");
142 f = fdopen(imsg.fd, "rb");
144 err = got_error_from_errno("fdopen");
148 if (obj->size + obj->hdrlen <=
149 GOT_PRIVSEP_INLINE_BLOB_DATA_MAX) {
150 err = got_inflate_to_mem(&buf, &size, NULL, f);
154 err = got_inflate_to_fd(&size, f, imsg_outfd.fd);
159 if (size < obj->hdrlen) {
160 err = got_error(GOT_ERR_BAD_OBJ_HDR);
164 err = got_privsep_send_blob(&ibuf, size, obj->hdrlen, buf);
168 if (fclose(f) != 0 && err == NULL)
169 err = got_error_from_errno("fclose");
170 } else if (imsg.fd != -1) {
171 if (close(imsg.fd) != 0 && err == NULL)
172 err = got_error_from_errno("close");
174 if (imsg_outfd.fd != -1) {
175 if (close(imsg_outfd.fd) != 0 && err == NULL)
176 err = got_error_from_errno("close");
180 imsg_free(&imsg_outfd);
182 got_object_close(obj);
189 if (!sigint_received && err->code != GOT_ERR_PRIVSEP_PIPE) {
190 fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
191 got_privsep_send_error(&ibuf, err);
194 if (close(GOT_IMSG_FD_CHILD) != 0 && err == NULL)
195 err = got_error_from_errno("close");