1 /*
2  * Copyright (c) 2022 Omar Polo <op@omarpolo.com>
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 [file...]\n",
30 	    getprogname());
31 	exit(1);
32 }
33 
34 int
35 main(int argc, char **argv)
36 {
37 	FILE		*fp = stdout;
38 	const char	*out = NULL;
39 	int		 ch, i;
40 
41 	while ((ch = getopt(argc, argv, "Go:")) != -1) {
42 		switch (ch) {
43 		case 'G':
44 			nodebug = 1;
45 			break;
46 		case 'o':
47 			out = optarg;
48 			break;
49 		default:
50 			usage();
51 		}
52 	}
53 	argc -= optind;
54 	argv += optind;
55 
56 	if (out && (fp = fopen(out, "w")) == NULL)
57 		err(1, "can't open %s", out);
58 
59 	if (out && unveil(out, "wc") == -1)
60 		err(1, "unveil %s", out);
61 	if (unveil("/", "r") == -1)
62 		err(1, "unveil /");
63 	if (pledge(out ? "stdio rpath cpath" : "stdio rpath", NULL) == -1)
64 		err(1, "pledge");
65 
66 	/* preamble */
67 	fprintf(fp, "#include \"tmpl.h\"\n");
68 
69 	if (argc == 0) {
70 		if (parse(fp, "/dev/stdin") == -1)
71 			goto err;
72 	} else {
73 		for (i = 0; i < argc; ++i)
74 			if (parse(fp, argv[i]) == -1)
75 				goto err;
76 	}
77 
78 	if (ferror(fp))
79 		goto err;
80 
81 	if (fclose(fp) == -1) {
82 		fp = NULL;
83 		goto err;
84 	}
85 
86 	return (0);
87 
88 err:
89 	if (fp)
90 		fclose(fp);
91 	if (out && unlink(out) == -1)
92 		err(1, "unlink %s", out);
93 	return (1);
94 }