1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
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
34 __FBSDID("$FreeBSD$");
35
36 #ifndef lint
37 static const char copyright[] =
38 "@(#) Copyright (c) 1980, 1988, 1993\n\
39 The Regents of the University of California. All rights reserved.\n";
40 #endif
41
42 #ifndef lint
43 static const char sccsid[] = "@(#)what.c 8.1 (Berkeley) 6/6/93";
44 #endif
45
46 #include <err.h>
47 #include <stdbool.h>
48 #include <stdio.h>
49 #include <stdlib.h>
50 #include <unistd.h>
51
52 static void usage(void);
53 static bool search(bool, bool, FILE *);
54
55 int
main(int argc,char * argv[])56 main(int argc, char *argv[])
57 {
58 const char *file;
59 FILE *in;
60 bool found, qflag, sflag;
61 int c;
62
63 qflag = sflag = false;
64
65 while ((c = getopt(argc, argv, "qs")) != -1) {
66 switch (c) {
67 case 'q':
68 qflag = true;
69 break;
70 case 's':
71 sflag = true;
72 break;
73 default:
74 usage();
75 }
76 }
77 argc -= optind;
78 argv += optind;
79
80 found = false;
81
82 if (argc == 0) {
83 if (search(sflag, qflag, stdin))
84 found = true;
85 } else {
86 while (argc--) {
87 file = *argv++;
88 in = fopen(file, "r");
89 if (in == NULL) {
90 if (!qflag)
91 warn("%s", file);
92 continue;
93 }
94 if (!qflag)
95 printf("%s:\n", file);
96 if (search(sflag, qflag, in))
97 found = true;
98 fclose(in);
99 }
100 }
101 exit(found ? 0 : 1);
102 }
103
104 static void
usage(void)105 usage(void)
106 {
107 fprintf(stderr, "usage: what [-qs] [file ...]\n");
108 exit(1);
109 }
110
111 bool
search(bool one,bool quiet,FILE * in)112 search(bool one, bool quiet, FILE *in)
113 {
114 bool found;
115 int c;
116
117 found = false;
118
119 while ((c = getc(in)) != EOF) {
120 loop: if (c != '@')
121 continue;
122 if ((c = getc(in)) != '(')
123 goto loop;
124 if ((c = getc(in)) != '#')
125 goto loop;
126 if ((c = getc(in)) != ')')
127 goto loop;
128 if (!quiet)
129 putchar('\t');
130 while ((c = getc(in)) != EOF && c && c != '"' &&
131 c != '>' && c != '\\' && c != '\n')
132 putchar(c);
133 putchar('\n');
134 found = true;
135 if (one)
136 break;
137 }
138 return (found);
139 }
140