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  */
16 
17 #include <err.h>
18 #include <stdio.h>
19 #include <stdlib.h>
20 #include <unistd.h>
21 
22 int	 parse(FILE *, const char *);
23 
24 int	 nodebug;
25 
26 static void __dead
27 usage(void)
28 {
29 	fprintf(stderr, "usage: %s [-G] [-o out] [file ...]\n", getprogname());
30 	exit(1);
31 }
32 
33 int
34 main(int argc, char **argv)
35 {
36 	FILE		*fp = stdout;
37 	const char	*out = NULL;
38 	int		 ch, i;
39 
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;
54 
55 	if (out && (fp = fopen(out, "w")) == NULL)
56 		err(1, "can't open %s", out);
57 
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");
64 
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 	}
74 
75 	if (ferror(fp))
76 		goto err;
77 
78 	if (fclose(fp) == -1) {
79 		fp = NULL;
80 		goto err;
81 	}
82 
83 	return (0);
84 
85 err:
86 	if (fp)
87 		fclose(fp);
88 	if (out && unlink(out) == -1)
89 		err(1, "unlink %s", out);
90 	return (1);
91 }