what.c revision 1.7 
1/*	$NetBSD: what.c,v 1.7 1999/02/22 22:23:10 kleink 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. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the University of
18 *	California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include <sys/cdefs.h>
37#ifndef lint
38__COPYRIGHT("@(#) Copyright (c) 1980, 1988, 1993\n\
39	The Regents of the University of California.  All rights reserved.\n");
40#endif /* not lint */
41
42#ifndef lint
43#if 0
44static char sccsid[] = "@(#)what.c	8.1 (Berkeley) 6/6/93";
45#endif
46__RCSID("$NetBSD: what.c,v 1.7 1999/02/22 22:23:10 kleink Exp $");
47#endif /* not lint */
48
49#include <stdio.h>
50#include <stdlib.h>
51#include <unistd.h>
52
53int main __P((int, char **));
54static void search __P((void));
55static void usage __P((void));
56
57static int matches;
58static int sflag;
59
60/*
61 * what
62 */
63/* ARGSUSED */
64int
65main(argc, argv)
66	int argc;
67	char **argv;
68{
69	int c;
70
71	matches = sflag = 0;
72	while ((c = getopt(argc, argv, "s")) != -1) {
73		switch (c) {
74		case 's':
75			sflag = 1;
76			break;
77		case '?':
78		default:
79			usage();
80		}
81	}
82	argc -= optind;
83	argv += optind;
84
85	if (argc < 1) {
86		usage();
87	} else do {
88		if (freopen(*argv, "r", stdin) == NULL) {
89			perror(*argv);
90			exit(matches ? EXIT_SUCCESS : 1);
91		}
92		printf("%s\n", *argv);
93		search();
94	} while (*++argv != NULL);
95
96	/* Note: the standard explicitly specifies an exit status of 1. */
97	exit(matches ? EXIT_SUCCESS : 1);
98	/* NOTREACHED */
99}
100
101static void
102search()
103{
104	int c;
105
106	while ((c = getchar()) != EOF) {
107loop:		if (c != '@')
108			continue;
109		if ((c = getchar()) != '(')
110			goto loop;
111		if ((c = getchar()) != '#')
112			goto loop;
113		if ((c = getchar()) != ')')
114			goto loop;
115		putchar('\t');
116		while ((c = getchar()) != EOF && c != '\0' && c != '"' &&
117		    c != '>' && c != '\n' && c != '\\')
118			putchar(c);
119		putchar('\n');
120		matches++;
121		if (sflag)
122			break;
123	}
124}
125
126static void
127usage()
128{
129
130	(void)fprintf(stderr, "usage: what [-s] file ...\n");
131	exit(1);
132}
133