what.c revision 1.8 
1/*	$NetBSD: what.c,v 1.8 1999/12/22 14:39:18 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 1.8 1999/12/22 14:39:18 kleink Exp $");
47#endif /* not lint */
48
49#include <locale.h>
50#include <stdio.h>
51#include <stdlib.h>
52#include <unistd.h>
53
54int main __P((int, char **));
55static void search __P((void));
56static void usage __P((void));
57
58static int matches;
59static int sflag;
60
61/*
62 * what
63 */
64/* ARGSUSED */
65int
66main(argc, argv)
67	int argc;
68	char **argv;
69{
70	int c;
71
72	(void)setlocale(LC_ALL, "");
73
74	matches = sflag = 0;
75	while ((c = getopt(argc, argv, "s")) != -1) {
76		switch (c) {
77		case 's':
78			sflag = 1;
79			break;
80		case '?':
81		default:
82			usage();
83		}
84	}
85	argc -= optind;
86	argv += optind;
87
88	if (argc < 1) {
89		usage();
90	} else do {
91		if (freopen(*argv, "r", stdin) == NULL) {
92			perror(*argv);
93			exit(matches ? EXIT_SUCCESS : 1);
94		}
95		printf("%s\n", *argv);
96		search();
97	} while (*++argv != NULL);
98
99	/* Note: the standard explicitly specifies an exit status of 1. */
100	exit(matches ? EXIT_SUCCESS : 1);
101	/* NOTREACHED */
102}
103
104static void
105search()
106{
107	int c;
108
109	while ((c = getchar()) != EOF) {
110loop:		if (c != '@')
111			continue;
112		if ((c = getchar()) != '(')
113			goto loop;
114		if ((c = getchar()) != '#')
115			goto loop;
116		if ((c = getchar()) != ')')
117			goto loop;
118		putchar('\t');
119		while ((c = getchar()) != EOF && c != '\0' && c != '"' &&
120		    c != '>' && c != '\n' && c != '\\')
121			putchar(c);
122		putchar('\n');
123		matches++;
124		if (sflag)
125			break;
126	}
127}
128
129static void
130usage()
131{
132
133	(void)fprintf(stderr, "usage: what [-s] file ...\n");
134	exit(1);
135}
136