/*
 * 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.
 *
 * @(#) Copyright (c) 1980, 1988, 1993 The Regents of the University of California.  All rights reserved.
 * @(#)what.c   8.1 (Berkeley) 6/6/93
 * $FreeBSD: src/usr.bin/what/what.c,v 1.5.2.1 2000/07/01 12:32:35 ps Exp $
 * $DragonFly: src/usr.bin/what/what.c,v 1.4 2004/11/19 17:46:40 liamfoy Exp $
 */

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

static int sflag;
static int found;

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

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

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

        if (!*argv)
                search();
        else do {
                if (!freopen(*argv, "r", stdin))
                        warn("%s", *argv);
                else {
                        printf("%s:\n", *argv);
                        search();
                }
        } while(*++argv);
        exit(!found);
}

static void
usage(void)
{
        (void)fprintf(stderr, "usage: what [-s] file ...\n");
        exit(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 && c != '"' &&
                    c != '>' && c != '\\' && c != '\n')
                        putchar(c);
                putchar('\n');
                found = 1;
                if (sflag)
                        return;
        }
}