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 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
31
32__FBSDID("$FreeBSD$");
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
39
40#ifndef lint
41static const char sccsid[] = "@(#)what.c	8.1 (Berkeley) 6/6/93";
42#endif
43
44#include <err.h>
45#include <stdbool.h>
46#include <stdio.h>
47#include <stdlib.h>
48#include <unistd.h>
49
50static void usage(void);
51static bool search(bool, bool, FILE *);
52
53int
54main(int argc, char *argv[])
55{
56	const char *file;
57	FILE *in;
58	bool found, qflag, sflag;
59	int c;
60
61	qflag = sflag = false;
62
63	while ((c = getopt(argc, argv, "qs")) != -1) {
64		switch (c) {
65		case 'q':
66			qflag = true;
67			break;
68		case 's':
69			sflag = true;
70			break;
71		default:
72			usage();
73		}
74	}
75	argc -= optind;
76	argv += optind;
77
78	found = false;
79
80	if (argc == 0) {
81		if (search(sflag, qflag, stdin))
82			found = true;
83	} else {
84		while (argc--) {
85			file = *argv++;
86			in = fopen(file, "r");
87			if (in == NULL) {
88				if (!qflag)
89					warn("%s", file);
90				continue;
91			}
92			if (!qflag)
93				printf("%s:\n", file);
94			if (search(sflag, qflag, in))
95				found = true;
96			fclose(in);
97		}
98	}
99	exit(found ? 0 : 1);
100}
101
102static void
103usage(void)
104{
105	fprintf(stderr, "usage: what [-qs] [file ...]\n");
106	exit(1);
107}
108
109bool
110search(bool one, bool quiet, FILE *in)
111{
112	bool found;
113	int c;
114
115	found = false;
116
117	while ((c = getc(in)) != EOF) {
118loop:		if (c != '@')
119			continue;
120		if ((c = getc(in)) != '(')
121			goto loop;
122		if ((c = getc(in)) != '#')
123			goto loop;
124		if ((c = getc(in)) != ')')
125			goto loop;
126		if (!quiet)
127			putchar('\t');
128		while ((c = getc(in)) != EOF && c && c != '"' &&
129		    c != '>' && c != '\\' && c != '\n')
130			putchar(c);
131		putchar('\n');
132		found = true;
133		if (one)
134			break;
135	}
136	return (found);
137}
138