/*
 *  getprotobyname.c - Vypise informace o protokolu na zaklade jeho jmena.
 *
 *  This is an example file for the UNIX - Programming and System
 *  Administration II course.
 *
 *  Copyright (C) 2001  Jan "Yenya" Kasprzak <kas@fi.muni.cz>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include <stdio.h>
#include <netdb.h>

int main(int argc, char **argv)
{
	struct protoent *pe;
	char **s;

	if (argc != 2) {
		fprintf(stderr, "Usage: %s protoname\n", *argv);
		return 1;
	}

	if ((pe = getprotobyname(argv[1])) == NULL) {
		fprintf(stderr, "%s: no such protocol.\n", argv[1]);
		return 1;
	}

	printf("Name: %s\n", pe->p_name);
	for(s = pe->p_aliases; s && *s; s++) {
		if (s == pe->p_aliases)
			fputs("Aliases: ", stdout);
		else
			fputs(", ", stdout);
		fputs(*s, stdout);
	}
	if (pe->p_aliases && *(pe->p_aliases))
		putchar('\n');

	printf("Number: %u\n", pe->p_proto);

	return 0;
}