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 <stdio.h>
18 #include <stdlib.h>
19 #include <unistd.h>
20 
21 #include "got_compat.h"
22 
23 int	 parse(FILE *, const char *);
24 
25 int	 nodebug;
26 
27 static void __dead
28 usage(void)
29 {
30 	fprintf(stderr, "usage: %s [file...]\n",
31 	    getprogname());
32 	exit(1);
33 }
34 
35 int
36 main(int argc, char **argv)
37 {
38 	FILE		*fp = stdout;
39 	const char	*out = NULL;
40 	int		 ch, i;
41 
42 	while ((ch = getopt(argc, argv, "Go:")) != -1) {
43 		switch (ch) {
44 		case 'G':
45 			nodebug = 1;
46 			break;
47 		case 'o':
48 			out = optarg;
49 			break;
50 		default:
51 			usage();
52 		}
53 	}
54 	argc -= optind;
55 	argv += optind;
56 
57 	if (out && (fp = fopen(out, "w")) == NULL)
58 		err(1, "can't open %s", out);
59 
60 	if (out && unveil(out, "wc") == -1)
61 		err(1, "unveil %s", out);
62 	if (unveil("/", "r") == -1)
63 		err(1, "unveil /");
64 	if (pledge(out ? "stdio rpath cpath" : "stdio rpath", NULL) == -1)
65 		err(1, "pledge");
66 
67 	if (argc == 0) {
68 		nodebug = 1;
69 		if (parse(fp, "/dev/stdin") == -1)
70 			goto err;
71 	} else {
72 		for (i = 0; i < argc; ++i)
73 			if (parse(fp, argv[i]) == -1)
74 				goto err;
75 	}
76 
77 	if (ferror(fp))
78 		goto err;
79 
80 	if (fclose(fp) == -1) {
81 		fp = NULL;
82 		goto err;
83 	}
84 
85 	return (0);
86 
87 err:
88 	if (fp)
89 		fclose(fp);
90 	if (out && unlink(out) == -1)
91 		err(1, "unlink %s", out);
92 	return (1);
93 }