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what.c revision 1.7 
      1 /*	$NetBSD: what.c,v 1.7 1999/02/22 22:23:10 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 1.7 1999/02/22 22:23:10 kleink Exp $");
     47 #endif /* not lint */
     48 
     49 #include <stdio.h>
     50 #include <stdlib.h>
     51 #include <unistd.h>
     52 
     53 int main __P((int, char **));
     54 static void search __P((void));
     55 static void usage __P((void));
     56 
     57 static int matches;
     58 static int sflag;
     59 
     60 /*
     61  * what
     62  */
     63 /* ARGSUSED */
     64 int
     65 main(argc, argv)
     66 	int argc;
     67 	char **argv;
     68 {
     69 	int c;
     70 
     71 	matches = sflag = 0;
     72 	while ((c = getopt(argc, argv, "s")) != -1) {
     73 		switch (c) {
     74 		case 's':
     75 			sflag = 1;
     76 			break;
     77 		case '?':
     78 		default:
     79 			usage();
     80 		}
     81 	}
     82 	argc -= optind;
     83 	argv += optind;
     84 
     85 	if (argc < 1) {
     86 		usage();
     87 	} else do {
     88 		if (freopen(*argv, "r", stdin) == NULL) {
     89 			perror(*argv);
     90 			exit(matches ? EXIT_SUCCESS : 1);
     91 		}
     92 		printf("%s\n", *argv);
     93 		search();
     94 	} while (*++argv != NULL);
     95 
     96 	/* Note: the standard explicitly specifies an exit status of 1. */
     97 	exit(matches ? EXIT_SUCCESS : 1);
     98 	/* NOTREACHED */
     99 }
    100 
    101 static void
    102 search()
    103 {
    104 	int c;
    105 
    106 	while ((c = getchar()) != EOF) {
    107 loop:		if (c != '@')
    108 			continue;
    109 		if ((c = getchar()) != '(')
    110 			goto loop;
    111 		if ((c = getchar()) != '#')
    112 			goto loop;
    113 		if ((c = getchar()) != ')')
    114 			goto loop;
    115 		putchar('\t');
    116 		while ((c = getchar()) != EOF && c != '\0' && c != '"' &&
    117 		    c != '>' && c != '\n' && c != '\\')
    118 			putchar(c);
    119 		putchar('\n');
    120 		matches++;
    121 		if (sflag)
    122 			break;
    123 	}
    124 }
    125 
    126 static void
    127 usage()
    128 {
    129 
    130 	(void)fprintf(stderr, "usage: what [-s] file ...\n");
    131 	exit(1);
    132 }
    133