usr.bin/what/what.c

   1 /*      $NetBSD: what.c,v 1.9 2003/08/07 11:17:16 agc 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. 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 #ifndef lint
  34 __COPYRIGHT("@(#) Copyright (c) 1980, 1988, 1993\
  35  The Regents of the University of California.  All rights reserved.");
  36 #endif /* not lint */
  37
  38 #ifndef lint
  39 #if 0
  40 static char sccsid[] = "@(#)what.c      8.1 (Berkeley) 6/6/93";
  41 #endif
  42 __RCSID("$NetBSD: what.c,v 1.9 2003/08/07 11:17:16 agc Exp $");
  43 #endif /* not lint */
  44
  45 #include <locale.h>
  46 #include <stdio.h>
  47 #include <stdlib.h>
  48 #include <unistd.h>
  49
  50 int main __P((int, char **));
  51 static void search __P((void));
  52 static void usage __P((void));
  53
  54 static int matches;
  55 static int sflag;
  56
  57 /*
  58  * what
  59  */
  60 /* ARGSUSED */
  61 int
  62 main(argc, argv)
  63         int argc;
  64         char **argv;
  65 {
  66         int c;
  67
  68         (void)setlocale(LC_ALL, "");
  69
  70         matches = sflag = 0;
  71         while ((c = getopt(argc, argv, "s")) != -1) {
  72                 switch (c) {
  73                 case 's':
  74                         sflag = 1;
  75                         break;
  76                 case '?':
  77                 default:
  78                         usage();
  79                 }
  80         }
  81         argc -= optind;
  82         argv += optind;
  83
  84         if (argc < 1) {
  85                 usage();
  86         } else do {
  87                 if (freopen(*argv, "r", stdin) == NULL) {
  88                         perror(*argv);
  89                         exit(matches ? EXIT_SUCCESS : 1);
  90                 }
  91                 printf("%s\n", *argv);
  92                 search();
  93         } while (*++argv != NULL);
  94
  95         /* Note: the standard explicitly specifies an exit status of 1. */
  96         exit(matches ? EXIT_SUCCESS : 1);
  97         /* NOTREACHED */
  98 }
  99
 100 static void
 101 search()
 102 {
 103         int c;
 104
 105         while ((c = getchar()) != EOF) {
 106 loop:           if (c != '@')
 107                         continue;
 108                 if ((c = getchar()) != '(')
 109                         goto loop;
 110                 if ((c = getchar()) != '#')
 111                         goto loop;
 112                 if ((c = getchar()) != ')')
 113                         goto loop;
 114                 putchar('\t');
 115                 while ((c = getchar()) != EOF && c != '\0' && c != '"' &&
 116                     c != '>' && c != '\n' && c != '\\')
 117                         putchar(c);
 118                 putchar('\n');
 119                 matches++;
 120                 if (sflag)
 121                         break;
 122         }
 123 }
 124
 125 static void
 126 usage()
 127 {
 128
 129         (void)fprintf(stderr, "usage: what [-s] file ...\n");
 130         exit(1);
 131 }