1/* $NetBSD: h_servent.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 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <netdb.h> 30#include <stdint.h> 31#include <stdlib.h> 32#include <unistd.h> 33#include <netinet/in.h> 34#include <sys/types.h> 35#include <stdio.h> 36 37static void 38pserv(const struct servent *svp) 39{ 40 char **pp; 41 42 printf("name=%s, port=%d, proto=%s, aliases=", 43 svp->s_name, ntohs((uint16_t)svp->s_port), svp->s_proto); 44 for (pp = svp->s_aliases; *pp; pp++) 45 printf("%s ", *pp); 46 printf("\n"); 47} 48 49static void 50usage(void) 51{ 52 (void)fprintf(stderr, "Usage: %s\n" 53 "\t%s -p <port> [-P <proto>]\n" 54 "\t%s -n <name> [-P <proto>]\n", getprogname(), getprogname(), 55 getprogname()); 56 exit(1); 57} 58 59int 60main(int argc, char *argv[]) 61{ 62 struct servent *svp; 63 const char *port = NULL, *proto = NULL, *name = NULL; 64 int c; 65 66 while ((c = getopt(argc, argv, "p:n:P:")) != -1) { 67 switch (c) { 68 case 'n': 69 name = optarg; 70 break; 71 case 'p': 72 port = optarg; 73 break; 74 case 'P': 75 proto = optarg; 76 break; 77 default: 78 usage(); 79 } 80 } 81 82 if (port && name) 83 usage(); 84 if (port) { 85 if ((svp = getservbyport(htons(atoi(port)), proto)) != NULL) 86 pserv(svp); 87 return 0; 88 } 89 if (name) { 90 if ((svp = getservbyname(name, proto)) != NULL) 91 pserv(svp); 92 return 0; 93 } 94 95 setservent(0); 96 while ((svp = getservent()) != NULL) 97 pserv(svp); 98 endservent(); 99 return 0; 100} 101