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fdf1f88bce
compatibility level with the GNU counterparts and have shown to be mature enough. For now, the GNU versions aren't removed from the tree, just detached from the build. Sponsored by: Google Summer of Code 2008 Portbuild run by: erwin Approved by: delphij
141 lines
3.0 KiB
C
141 lines
3.0 KiB
C
/* $OpenBSD: dc.c,v 1.11 2009/10/27 23:59:37 deraadt Exp $ */
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/*
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* Copyright (c) 2003, Otto Moerbeek <otto@drijf.net>
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* Copyright (c) 2009, Gabor Kovesdan <gabor@FreeBSD.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/stat.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <getopt.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "extern.h"
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#define DC_VER "1.3-FreeBSD"
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static void usage(void);
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extern char *__progname;
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struct source src;
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struct option long_options[] =
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{
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{"expression", required_argument, NULL, 'e'},
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{"file", required_argument, NULL, 'f'},
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{"help", no_argument, NULL, 'h'},
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{"version", no_argument, NULL, 'V'}
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};
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static void
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usage(void)
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{
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fprintf(stderr, "usage: %s [-hVx] [-e expression] [file]\n",
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__progname);
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exit(1);
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}
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static void
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procfile(char *fname) {
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FILE *file;
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struct stat st;
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file = fopen(fname, "r");
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if (file == NULL)
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err(1, "cannot open file %s", fname);
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if (fstat(fileno(file), &st) == -1)
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err(1, "%s", fname);
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if (S_ISDIR(st.st_mode)) {
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errno = EISDIR;
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err(1, "%s", fname);
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}
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src_setstream(&src, file);
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reset_bmachine(&src);
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eval();
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fclose(file);
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}
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int
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main(int argc, char *argv[])
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{
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int ch;
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bool extended_regs = false;
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char *buf;
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bool preproc_done = false;
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if ((buf = strdup("")) == NULL)
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err(1, NULL);
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init_bmachine(extended_regs);
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setlinebuf(stdout);
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setlinebuf(stderr);
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/* accept and ignore a single dash to be 4.4BSD dc(1) compatible */
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while ((ch = getopt_long(argc, argv, "e:f:Vx", long_options, NULL)) != -1) {
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switch (ch) {
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case 'e':
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src_setstring(&src, optarg);
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reset_bmachine(&src);
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eval();
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preproc_done = true;
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break;
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case 'f':
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procfile(optarg);
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preproc_done = true;
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break;
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case 'x':
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extended_regs = true;
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break;
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case 'V':
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fprintf(stderr, "%s (BSD bc) %s\n", __progname, DC_VER);
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exit(0);
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break;
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case '-':
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break;
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case 'h':
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/* FALLTHROUGH */
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (argc > 1)
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usage();
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if (argc == 1) {
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procfile(argv[0]);
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preproc_done = true;
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}
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if (preproc_done)
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return (0);
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src_setstream(&src, stdin);
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reset_bmachine(&src);
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eval();
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return (0);
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}
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