Blob


1 /*
2 * Copyright (c) 2022 Omar Polo <op@openbsd.org>
3 *
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.
7 *
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.
15 */
17 #include <err.h>
18 #include <stdio.h>
19 #include <stdlib.h>
20 #include <unistd.h>
22 int parse(FILE *, const char *);
24 int nodebug;
26 static void __dead
27 usage(void)
28 {
29 fprintf(stderr, "usage: %s [-G] [-o out] [file ...]\n", getprogname());
30 exit(1);
31 }
33 int
34 main(int argc, char **argv)
35 {
36 FILE *fp = stdout;
37 const char *out = NULL;
38 int ch, i;
40 while ((ch = getopt(argc, argv, "Go:")) != -1) {
41 switch (ch) {
42 case 'G':
43 nodebug = 1;
44 break;
45 case 'o':
46 out = optarg;
47 break;
48 default:
49 usage();
50 }
51 }
52 argc -= optind;
53 argv += optind;
55 if (out && (fp = fopen(out, "w")) == NULL)
56 err(1, "can't open %s", out);
58 if (out && unveil(out, "wc") == -1)
59 err(1, "unveil %s", out);
60 if (unveil("/", "r") == -1)
61 err(1, "unveil /");
62 if (pledge(out ? "stdio rpath cpath" : "stdio rpath", NULL) == -1)
63 err(1, "pledge");
65 if (argc == 0) {
66 nodebug = 1;
67 if (parse(fp, "/dev/stdin") == -1)
68 goto err;
69 } else {
70 for (i = 0; i < argc; ++i)
71 if (parse(fp, argv[i]) == -1)
72 goto err;
73 }
75 if (ferror(fp))
76 goto err;
78 if (fclose(fp) == -1) {
79 fp = NULL;
80 goto err;
81 }
83 return (0);
85 err:
86 if (fp)
87 fclose(fp);
88 if (out && unlink(out) == -1)
89 err(1, "unlink %s", out);
90 return (1);
91 }