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/* $OpenBSD: dc.c,v 1.18 2016/07/17 17:30:47 otto Exp $ */ |
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/* |
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* Copyright (c) 2003, Otto Moerbeek <otto@drijf.net> |
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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/stat.h> |
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#include <err.h> |
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#include <errno.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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static __dead void usage(void); |
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extern char *__progname; |
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static __dead void |
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usage(void) |
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{ |
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(void)fprintf(stderr, "usage: %s [-x] [-e expression] [file]\n", |
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__progname); |
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exit(1); |
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} |
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int |
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dc_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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FILE *file; |
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struct source src; |
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char *buf, *p; |
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struct stat st; |
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✗✓ |
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if ((buf = strdup("")) == NULL) |
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err(1, NULL); |
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/* accept and ignore a single dash to be 4.4BSD dc(1) compatible */ |
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optind = 1; |
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optreset = 1; |
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✓✓ |
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while ((ch = getopt(argc, argv, "e:x-")) != -1) { |
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✗✓✗✗
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switch (ch) { |
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case 'e': |
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p = buf; |
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if (asprintf(&buf, "%s %s", buf, optarg) == -1) |
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err(1, NULL); |
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free(p); |
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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 '-': |
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break; |
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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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init_bmachine(extended_regs); |
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(void)setvbuf(stdout, NULL, _IOLBF, 0); |
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(void)setvbuf(stderr, NULL, _IOLBF, 0); |
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✗✓ |
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if (argc > 1) |
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usage(); |
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✗✓ |
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if (buf[0] != '\0') { |
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src_setstring(&src, buf); |
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reset_bmachine(&src); |
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eval(); |
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free(buf); |
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if (argc == 0) |
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return (0); |
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} |
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✓✗ |
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if (argc == 1) { |
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file = fopen(argv[0], "r"); |
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✗✓ |
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if (file == NULL) |
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err(1, "cannot open file %s", argv[0]); |
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✗✓ |
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if (pledge("stdio wpath cpath rpath", NULL) == -1) |
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err(1, "pledge"); |
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✓✗✗✓
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if (fstat(fileno(file), &st) == -1) |
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err(1, "%s", argv[0]); |
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✗✓ |
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if (S_ISDIR(st.st_mode)) |
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errc(1, EISDIR, "%s", argv[0]); |
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src_setstream(&src, file); |
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reset_bmachine(&src); |
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eval(); |
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(void)fclose(file); |
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/* |
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* BSD and Solaris dc(1) continue with stdin after processing |
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* the file given as the argument. We follow GNU dc(1). |
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*/ |
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return (0); |
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} |
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if (pledge("stdio wpath cpath rpath", NULL) == -1) |
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err(1, "pledge"); |
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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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} |