4.3BSD-Reno/src/usr.bin/what/what.c

/*
 * Copyright (c) 1980, 1988 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted provided
 * that: (1) source distributions retain this entire copyright notice and
 * comment, and (2) distributions including binaries display the following
 * acknowledgement:  ``This product includes software developed by the
 * University of California, Berkeley and its contributors'' in the
 * documentation or other materials provided with the distribution and in
 * all advertising materials mentioning features or use of this software.
 * 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980, 1988 Regents of the University of California.\n\
 All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)what.c	5.4 (Berkeley) 6/1/90";
#endif /* not lint */

#include <stdio.h>

/*
 * what
 */
/* ARGSUSED */
main(argc, argv)
	int argc;
	char **argv;
{
	if (!*++argv) 
		search();
	else do {
		if (!freopen(*argv, "r", stdin)) {
			perror(*argv);
			exit(1);
		}
		printf("%s\n", *argv);
		search();
	} while(*++argv);
	exit(0);
}

static
search()
{
	register 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 != '\n')
			putchar(c);
		putchar('\n');
	}
}