1 /* $OpenBSD: dc.c,v 1.11 2009/10/27 23:59:37 deraadt Exp $ */
4 * Copyright (c) 2003, Otto Moerbeek <otto@drijf.net>
5 * Copyright (c) 2009, Gabor Kovesdan <gabor@FreeBSD.org>
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 #include <sys/cdefs.h>
21 __FBSDID("$FreeBSD$");
25 #include <capsicum_helpers.h>
38 #define DC_VER "1.3-FreeBSD"
40 static void usage(void);
42 extern char *__progname;
44 static struct source src;
46 static const struct option long_options[] =
48 {"expression", required_argument, NULL, 'e'},
49 {"file", required_argument, NULL, 'f'},
50 {"help", no_argument, NULL, 'h'},
51 {"version", no_argument, NULL, 'V'}
57 fprintf(stderr, "usage: %s [-hVx] [-e expression] [file]\n",
63 procfd(int fd, char *fname) {
67 file = fdopen(fd, "r");
69 err(1, "cannot open file %s", fname);
70 if (fstat(fileno(file), &st) == -1)
72 if (S_ISDIR(st.st_mode)) {
76 src_setstream(&src, file);
83 main(int argc, char *argv[])
86 bool extended_regs = false, preproc_done = false;
88 /* accept and ignore a single dash to be 4.4BSD dc(1) compatible */
89 while ((ch = getopt_long(argc, argv, "e:f:hVx", long_options, NULL)) != -1) {
93 init_bmachine(extended_regs);
94 src_setstring(&src, optarg);
101 init_bmachine(extended_regs);
102 fd = open(optarg, O_RDONLY);
104 err(1, "cannot open file %s", optarg);
109 extended_regs = true;
112 fprintf(stderr, "%s (BSD bc) %s\n", __progname, DC_VER);
127 init_bmachine(extended_regs);
128 (void)setvbuf(stdout, NULL, _IOLBF, 0);
129 (void)setvbuf(stderr, NULL, _IOLBF, 0);
134 fd = open(argv[0], O_RDONLY);
136 err(1, "cannot open file %s", argv[0]);
138 if (caph_limit_stream(fd, CAPH_READ) < 0 ||
139 caph_limit_stdio() < 0 ||
149 if (caph_limit_stdio() < 0 || caph_enter())
151 src_setstream(&src, stdin);
152 reset_bmachine(&src);