/*      $NetBSD: what.c,v 1.16 2025/04/12 10:09:15 rin Exp $    */

/*
* Copyright (c) 1980, 1988, 1993
*      The Regents of the University of California.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif

#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1980, 1988, 1993\
The Regents of the University of California.  All rights reserved.");
#endif /* not lint */

#ifndef lint
#if 0
static char sccsid[] = "@(#)what.c      8.1 (Berkeley) 6/6/93";
#endif
__RCSID("$NetBSD: what.c,v 1.16 2025/04/12 10:09:15 rin Exp $");
#endif /* not lint */

#include <locale.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

static void search(void);
__dead static void usage(void);

static int matches;
static int sflag;

/*
* what
*/
int
main(int argc, char **argv)
{
       int c;

       (void)setlocale(LC_ALL, "");

       matches = sflag = 0;
       while ((c = getopt(argc, argv, "s")) != -1) {
               switch (c) {
               case 's':
                       sflag = 1;
                       break;
               case '?':
               default:
                       usage();
               }
       }
       argc -= optind;
       argv += optind;

       if (argc < 1) {
               usage();
       } else do {
               if (freopen(*argv, "r", stdin) == NULL) {
                       warn("Cannot open `%s'", *argv);
                       break;
               }
               printf("%s:\n", *argv);
               search();
       } while (*++argv != NULL);

       /* Note: the standard explicitly specifies an exit status of 0/1. */
       return matches ? 0 : 1;
}

static void
search(void)
{
       int c;

       while ((c = getchar()) != EOF) {
loop:           if (c != '@')
                       continue;
               if ((c = getchar()) != '(')
                       goto loop;
               if ((c = getchar()) != '#')
                       goto loop;
               if ((c = getchar()) != ')')
                       goto loop;
               putchar('\t');
               while ((c = getchar()) != EOF && c != '\0' && c != '"' &&
                   c != '>' && c != '\n' && c != '\\')
                       putchar(c);
               putchar('\n');
               matches++;
               if (sflag)
                       break;
       }
}

static void
usage(void)
{

       (void)fprintf(stderr, "Usage: %s [-s] file ...\n", getprogname());
       exit(1);
}