what.c revision 50477 
1/*
2 * Copyright (c) 1980, 1988, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static const char copyright[] =
36"@(#) Copyright (c) 1980, 1988, 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41#if 0
42static char sccsid[] = "@(#)what.c	8.1 (Berkeley) 6/6/93";
43#endif
44static const char rcsid[] =
45  "$FreeBSD: head/usr.bin/what/what.c 50477 1999-08-28 01:08:13Z peter $";
46#endif /* not lint */
47
48#include <err.h>
49#include <stdio.h>
50#include <stdlib.h>
51#include <unistd.h>
52
53static int sflag;
54static int found;
55
56void search __P((void));
57
58/*
59 * what
60 */
61int
62main(argc, argv)
63	int argc;
64	char **argv;
65{
66	int c;
67
68	while ((c = getopt(argc, argv, "s")) != -1)
69		switch (c) {
70		case 's':
71			sflag = 1;
72			break;
73		default:
74			(void)fprintf(stderr,
75			    "usage: what [-s] file ...\n");
76			exit(1);
77		}
78	argv += optind;
79
80	if (!*argv)
81		search();
82	else do {
83		if (!freopen(*argv, "r", stdin))
84			warn("%s", *argv);
85		else {
86			printf("%s:\n", *argv);
87			search();
88		}
89	} while(*++argv);
90	exit(!found);
91}
92
93void
94search()
95{
96	register int c;
97
98	while ((c = getchar()) != EOF) {
99loop:		if (c != '@')
100			continue;
101		if ((c = getchar()) != '(')
102			goto loop;
103		if ((c = getchar()) != '#')
104			goto loop;
105		if ((c = getchar()) != ')')
106			goto loop;
107		putchar('\t');
108		while ((c = getchar()) != EOF && c && c != '"' &&
109		    c != '>' && c != '\\' && c != '\n')
110			putchar(c);
111		putchar('\n');
112		found = 1;
113		if (sflag)
114			return;
115	}
116}
117