2 * Copyright (c) 2018 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>
33 #include "got_error.h"
34 #include "got_object.h"
36 #include "got_lib_delta.h"
37 #include "got_lib_inflate.h"
38 #include "got_lib_object.h"
39 #include "got_lib_object_parse.h"
40 #include "got_lib_privsep.h"
42 static volatile sig_atomic_t sigint_received;
45 catch_sigint(int signo)
50 static const struct got_error *
51 read_tag_object(struct got_tag_object **tag, FILE *f)
53 const struct got_error *err = NULL;
54 struct got_object *obj;
58 err = got_inflate_to_mem(&p, &len, f);
62 err = got_object_parse_header(&obj, p, len);
66 if (len < obj->hdrlen + obj->size) {
67 err = got_error(GOT_ERR_BAD_OBJ_DATA);
71 /* Skip object header. */
73 err = got_object_parse_tag(tag, p + obj->hdrlen, len);
76 got_object_close(obj);
81 main(int argc, char *argv[])
83 const struct got_error *err = NULL;
86 signal(SIGINT, catch_sigint);
88 imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
91 /* revoke access to most system calls */
92 if (pledge("stdio recvfd", NULL) == -1) {
93 err = got_error_from_errno("pledge");
94 got_privsep_send_error(&ibuf, err);
102 struct got_tag_object *tag = NULL;
104 if (sigint_received) {
105 err = got_error(GOT_ERR_CANCELLED);
109 err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
111 if (err->code == GOT_ERR_PRIVSEP_PIPE)
116 if (imsg.hdr.type == GOT_IMSG_STOP)
119 if (imsg.hdr.type != GOT_IMSG_TAG_REQUEST) {
120 err = got_error(GOT_ERR_PRIVSEP_MSG);
125 err = got_error(GOT_ERR_PRIVSEP_NO_FD);
129 /* Always assume file offset zero. */
130 f = fdopen(imsg.fd, "rb");
132 err = got_error_from_errno("fdopen");
136 err = read_tag_object(&tag, f);
140 err = got_privsep_send_tag(&ibuf, tag);
143 if (fclose(f) != 0 && err == NULL)
144 err = got_error_from_errno("fclose");
145 } else if (imsg.fd != -1) {
146 if (close(imsg.fd) != 0 && err == NULL)
147 err = got_error_from_errno("close");
156 if (!sigint_received && err->code != GOT_ERR_PRIVSEP_PIPE) {
157 fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
158 got_privsep_send_error(&ibuf, err);
161 if (close(GOT_IMSG_FD_CHILD) != 0 && err == NULL)
162 err = got_error_from_errno("close");