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
33 #ifndef lint
34 static const char copyright[] =
35 "@(#) Copyright (c) 1980, 1988, 1993\n\
36 The Regents of the University of California. All rights reserved.\n";
37 #endif
38
39 #ifndef lint
40 static const char sccsid[] = "@(#)what.c 8.1 (Berkeley) 6/6/93";
41 #endif
42
43 #include <err.h>
44 #include <stdbool.h>
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <unistd.h>
48
49 static void usage(void) __dead2;
50 static bool search(bool, bool, FILE *);
51
52 int
main(int argc,char * argv[])53 main(int argc, char *argv[])
54 {
55 const char *file;
56 FILE *in;
57 bool found, qflag, sflag;
58 int c;
59
60 qflag = sflag = false;
61
62 while ((c = getopt(argc, argv, "qs")) != -1) {
63 switch (c) {
64 case 'q':
65 qflag = true;
66 break;
67 case 's':
68 sflag = true;
69 break;
70 default:
71 usage();
72 }
73 }
74 argc -= optind;
75 argv += optind;
76
77 found = false;
78
79 if (argc == 0) {
80 if (search(sflag, qflag, stdin))
81 found = true;
82 } else {
83 while (argc--) {
84 file = *argv++;
85 in = fopen(file, "r");
86 if (in == NULL) {
87 if (!qflag)
88 warn("%s", file);
89 continue;
90 }
91 if (!qflag)
92 printf("%s:\n", file);
93 if (search(sflag, qflag, in))
94 found = true;
95 fclose(in);
96 }
97 }
98 exit(found ? 0 : 1);
99 }
100
101 static void
usage(void)102 usage(void)
103 {
104 fprintf(stderr, "usage: what [-qs] [file ...]\n");
105 exit(1);
106 }
107
108 bool
search(bool one,bool quiet,FILE * in)109 search(bool one, bool quiet, FILE *in)
110 {
111 bool found;
112 int c;
113
114 found = false;
115
116 while ((c = getc(in)) != EOF) {
117 loop: if (c != '@')
118 continue;
119 if ((c = getc(in)) != '(')
120 goto loop;
121 if ((c = getc(in)) != '#')
122 goto loop;
123 if ((c = getc(in)) != ')')
124 goto loop;
125 if (!quiet)
126 putchar('\t');
127 while ((c = getc(in)) != EOF && c && c != '"' &&
128 c != '>' && c != '\\' && c != '\n')
129 putchar(c);
130 putchar('\n');
131 found = true;
132 if (one)
133 break;
134 }
135 return (found);
136 }
137