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 * 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 servent *svp) 42 { 43 char **pp; 44 45 printf("name=%s, port=%d, proto=%s, aliases=", 46 svp->s_name, ntohs((uint16_t)svp->s_port), svp->s_proto); 47 for (pp = svp->s_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 <port> [-P <proto>]\n" 57 "\t%s -n <name> [-P <proto>]\n", getprogname(), getprogname(), 58 getprogname()); 59 exit(1); 60 } 61 62 int 63 main(int argc, char *argv[]) 64 { 65 struct servent *svp; 66 const char *port = NULL, *proto = NULL, *name = NULL; 67 int c; 68 69 while ((c = getopt(argc, argv, "p:n:P:")) != -1) { 70 switch (c) { 71 case 'n': 72 name = optarg; 73 break; 74 case 'p': 75 port = optarg; 76 break; 77 case 'P': 78 proto = optarg; 79 break; 80 default: 81 usage(); 82 } 83 } 84 85 if (port && name) 86 usage(); 87 if (port) { 88 if ((svp = getservbyport(htons(atoi(port)), proto)) != NULL) 89 pserv(svp); 90 return 0; 91 } 92 if (name) { 93 if ((svp = getservbyname(name, proto)) != NULL) 94 pserv(svp); 95 return 0; 96 } 97 98 setservent(0); 99 while ((svp = getservent()) != NULL) 100 pserv(svp); 101 endservent(); 102 return 0; 103 } 104