what.c revision 1.10 
1/*	$NetBSD: what.c,v 1.10 2008/07/21 14:19:28 lukem Exp $	*/
2
3/*
4 * Copyright (c) 1980, 1988, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#ifndef lint
34__COPYRIGHT("@(#) Copyright (c) 1980, 1988, 1993\
35 The Regents of the University of California.  All rights reserved.");
36#endif /* not lint */
37
38#ifndef lint
39#if 0
40static char sccsid[] = "@(#)what.c	8.1 (Berkeley) 6/6/93";
41#endif
42__RCSID("$NetBSD: what.c,v 1.10 2008/07/21 14:19:28 lukem Exp $");
43#endif /* not lint */
44
45#include <locale.h>
46#include <stdio.h>
47#include <stdlib.h>
48#include <unistd.h>
49
50int main __P((int, char **));
51static void search __P((void));
52static void usage __P((void));
53
54static int matches;
55static int sflag;
56
57/*
58 * what
59 */
60/* ARGSUSED */
61int
62main(argc, argv)
63	int argc;
64	char **argv;
65{
66	int c;
67
68	(void)setlocale(LC_ALL, "");
69
70	matches = sflag = 0;
71	while ((c = getopt(argc, argv, "s")) != -1) {
72		switch (c) {
73		case 's':
74			sflag = 1;
75			break;
76		case '?':
77		default:
78			usage();
79		}
80	}
81	argc -= optind;
82	argv += optind;
83
84	if (argc < 1) {
85		usage();
86	} else do {
87		if (freopen(*argv, "r", stdin) == NULL) {
88			perror(*argv);
89			exit(matches ? EXIT_SUCCESS : 1);
90		}
91		printf("%s\n", *argv);
92		search();
93	} while (*++argv != NULL);
94
95	/* Note: the standard explicitly specifies an exit status of 1. */
96	exit(matches ? EXIT_SUCCESS : 1);
97	/* NOTREACHED */
98}
99
100static void
101search()
102{
103	int c;
104
105	while ((c = getchar()) != EOF) {
106loop:		if (c != '@')
107			continue;
108		if ((c = getchar()) != '(')
109			goto loop;
110		if ((c = getchar()) != '#')
111			goto loop;
112		if ((c = getchar()) != ')')
113			goto loop;
114		putchar('\t');
115		while ((c = getchar()) != EOF && c != '\0' && c != '"' &&
116		    c != '>' && c != '\n' && c != '\\')
117			putchar(c);
118		putchar('\n');
119		matches++;
120		if (sflag)
121			break;
122	}
123}
124
125static void
126usage()
127{
128
129	(void)fprintf(stderr, "usage: what [-s] file ...\n");
130	exit(1);
131}
132