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what.c revision 1.8 
      1 /*	$NetBSD: what.c,v 1.8 1999/12/22 14:39:18 kleink 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. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 __COPYRIGHT("@(#) Copyright (c) 1980, 1988, 1993\n\
     39 	The Regents of the University of California.  All rights reserved.\n");
     40 #endif /* not lint */
     41 
     42 #ifndef lint
     43 #if 0
     44 static char sccsid[] = "@(#)what.c	8.1 (Berkeley) 6/6/93";
     45 #endif
     46 __RCSID("$NetBSD: what.c,v 1.8 1999/12/22 14:39:18 kleink Exp $");
     47 #endif /* not lint */
     48 
     49 #include <locale.h>
     50 #include <stdio.h>
     51 #include <stdlib.h>
     52 #include <unistd.h>
     53 
     54 int main __P((int, char **));
     55 static void search __P((void));
     56 static void usage __P((void));
     57 
     58 static int matches;
     59 static int sflag;
     60 
     61 /*
     62  * what
     63  */
     64 /* ARGSUSED */
     65 int
     66 main(argc, argv)
     67 	int argc;
     68 	char **argv;
     69 {
     70 	int c;
     71 
     72 	(void)setlocale(LC_ALL, "");
     73 
     74 	matches = sflag = 0;
     75 	while ((c = getopt(argc, argv, "s")) != -1) {
     76 		switch (c) {
     77 		case 's':
     78 			sflag = 1;
     79 			break;
     80 		case '?':
     81 		default:
     82 			usage();
     83 		}
     84 	}
     85 	argc -= optind;
     86 	argv += optind;
     87 
     88 	if (argc < 1) {
     89 		usage();
     90 	} else do {
     91 		if (freopen(*argv, "r", stdin) == NULL) {
     92 			perror(*argv);
     93 			exit(matches ? EXIT_SUCCESS : 1);
     94 		}
     95 		printf("%s\n", *argv);
     96 		search();
     97 	} while (*++argv != NULL);
     98 
     99 	/* Note: the standard explicitly specifies an exit status of 1. */
    100 	exit(matches ? EXIT_SUCCESS : 1);
    101 	/* NOTREACHED */
    102 }
    103 
    104 static void
    105 search()
    106 {
    107 	int c;
    108 
    109 	while ((c = getchar()) != EOF) {
    110 loop:		if (c != '@')
    111 			continue;
    112 		if ((c = getchar()) != '(')
    113 			goto loop;
    114 		if ((c = getchar()) != '#')
    115 			goto loop;
    116 		if ((c = getchar()) != ')')
    117 			goto loop;
    118 		putchar('\t');
    119 		while ((c = getchar()) != EOF && c != '\0' && c != '"' &&
    120 		    c != '>' && c != '\n' && c != '\\')
    121 			putchar(c);
    122 		putchar('\n');
    123 		matches++;
    124 		if (sflag)
    125 			break;
    126 	}
    127 }
    128 
    129 static void
    130 usage()
    131 {
    132 
    133 	(void)fprintf(stderr, "usage: what [-s] file ...\n");
    134 	exit(1);
    135 }
    136