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what.c revision 1.16 
      1 /*	$NetBSD: what.c,v 1.16 2025/04/12 10:09:15 rin 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 #if HAVE_NBTOOL_CONFIG_H
     33 #include "nbtool_config.h"
     34 #endif
     35 
     36 #include <sys/cdefs.h>
     37 #ifndef lint
     38 __COPYRIGHT("@(#) Copyright (c) 1980, 1988, 1993\
     39  The Regents of the University of California.  All rights reserved.");
     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 1.16 2025/04/12 10:09:15 rin Exp $");
     47 #endif /* not lint */
     48 
     49 #include <locale.h>
     50 #include <err.h>
     51 #include <stdio.h>
     52 #include <stdlib.h>
     53 #include <unistd.h>
     54 
     55 static void search(void);
     56 __dead static void usage(void);
     57 
     58 static int matches;
     59 static int sflag;
     60 
     61 /*
     62  * what
     63  */
     64 int
     65 main(int argc, char **argv)
     66 {
     67 	int c;
     68 
     69 	(void)setlocale(LC_ALL, "");
     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 			warn("Cannot open `%s'", *argv);
     90 			break;
     91 		}
     92 		printf("%s:\n", *argv);
     93 		search();
     94 	} while (*++argv != NULL);
     95 
     96 	/* Note: the standard explicitly specifies an exit status of 0/1. */
     97 	return matches ? 0 : 1;
     98 }
     99 
    100 static void
    101 search(void)
    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(void)
    127 {
    128 
    129 	(void)fprintf(stderr, "Usage: %s [-s] file ...\n", getprogname());
    130 	exit(1);
    131 }
    132