mirror of
https://github.com/freebsd/freebsd-src
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9dcbb9e681
In most cases, usage does not return, so mark them as __dead2. For the
cases where they do return, they have not been marked __dead2.
Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/735
(cherry picked from commit cccdaf507e)
136 lines
3.3 KiB
C
136 lines
3.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1980, 1988, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1980, 1988, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif
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#ifndef lint
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static const char sccsid[] = "@(#)what.c 8.1 (Berkeley) 6/6/93";
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#endif
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#include <err.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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static void usage(void) __dead2;
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static bool search(bool, bool, FILE *);
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int
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main(int argc, char *argv[])
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{
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const char *file;
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FILE *in;
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bool found, qflag, sflag;
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int c;
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qflag = sflag = false;
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while ((c = getopt(argc, argv, "qs")) != -1) {
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switch (c) {
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case 'q':
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qflag = true;
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break;
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case 's':
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sflag = true;
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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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found = false;
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if (argc == 0) {
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if (search(sflag, qflag, stdin))
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found = true;
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} else {
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while (argc--) {
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file = *argv++;
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in = fopen(file, "r");
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if (in == NULL) {
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if (!qflag)
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warn("%s", file);
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continue;
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}
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if (!qflag)
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printf("%s:\n", file);
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if (search(sflag, qflag, in))
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found = true;
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fclose(in);
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}
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}
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exit(found ? 0 : 1);
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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: what [-qs] [file ...]\n");
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exit(1);
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}
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bool
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search(bool one, bool quiet, FILE *in)
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{
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bool found;
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int c;
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found = false;
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while ((c = getc(in)) != EOF) {
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loop: if (c != '@')
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continue;
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if ((c = getc(in)) != '(')
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goto loop;
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if ((c = getc(in)) != '#')
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goto loop;
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if ((c = getc(in)) != ')')
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goto loop;
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if (!quiet)
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putchar('\t');
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while ((c = getc(in)) != EOF && c && c != '"' &&
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c != '>' && c != '\\' && c != '\n')
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putchar(c);
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putchar('\n');
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found = true;
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if (one)
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break;
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}
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return (found);
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}
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