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what.c revision 1.10 
      1 /*	$NetBSD: what.c,v 1.10 2008/07/21 14:19:28 lukem 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 1.10 2008/07/21 14:19:28 lukem 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 }
    132