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