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h_protoent.c revision 1.1 
      1 /* $NetBSD: h_protoent.c,v 1.1 2011/01/12 17:32:27 pgoyette Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2011 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <netdb.h>
     33 #include <stdint.h>
     34 #include <stdlib.h>
     35 #include <unistd.h>
     36 #include <netinet/in.h>
     37 #include <sys/types.h>
     38 #include <stdio.h>
     39 
     40 static void
     41 pserv(const struct protoent *prp)
     42 {
     43 	char **pp;
     44 
     45 	printf("name=%s, proto=%d, aliases=",
     46 	    prp->p_name, prp->p_proto);
     47 	for (pp = prp->p_aliases; *pp; pp++)
     48 		printf("%s ", *pp);
     49 	printf("\n");
     50 }
     51 
     52 static void
     53 usage(void)
     54 {
     55 	(void)fprintf(stderr, "Usage: %s\n"
     56 	    "\t%s -p <proto>\n"
     57 	    "\t%s -n <name>\n", getprogname(), getprogname(),
     58 	    getprogname());
     59 	exit(1);
     60 }
     61 
     62 int
     63 main(int argc, char *argv[])
     64 {
     65 	struct protoent *prp;
     66 	const char *proto = NULL, *name = NULL;
     67 	int c;
     68 
     69 	while ((c = getopt(argc, argv, "p:n:")) != -1) {
     70 		switch (c) {
     71 		case 'n':
     72 			name = optarg;
     73 			break;
     74 		case 'p':
     75 			proto = optarg;
     76 			break;
     77 		default:
     78 			usage();
     79 		}
     80 	}
     81 
     82 	if (proto && name)
     83 		usage();
     84 	if (proto) {
     85 		if ((prp = getprotobynumber(atoi(proto))) != NULL)
     86 			pserv(prp);
     87 		return 0;
     88 	}
     89 	if (name) {
     90 		if ((prp = getprotobyname(name)) != NULL)
     91 			pserv(prp);
     92 		return 0;
     93 	}
     94 
     95 	setprotoent(0);
     96 	while ((prp = getprotoent()) != NULL)
     97 		pserv(prp);
     98 	endprotoent();
     99 	return 0;
    100 }
    101