1 /* $NetBSD: h_protoent.c,v 1.2 2011/04/07 18:14:09 jruoho 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 37 static void 38 pserv(const struct protoent *prp) 39 { 40 char **pp; 41 42 printf("name=%s, proto=%d, aliases=", 43 prp->p_name, prp->p_proto); 44 for (pp = prp->p_aliases; *pp; pp++) 45 printf("%s ", *pp); 46 printf("\n"); 47 } 48 49 static void 50 usage(void) 51 { 52 (void)fprintf(stderr, "Usage: %s\n" 53 "\t%s -p <proto>\n" 54 "\t%s -n <name>\n", getprogname(), getprogname(), 55 getprogname()); 56 exit(1); 57 } 58 59 int 60 main(int argc, char *argv[]) 61 { 62 struct protoent *prp; 63 const char *proto = NULL, *name = NULL; 64 int c; 65 66 while ((c = getopt(argc, argv, "p:n:")) != -1) { 67 switch (c) { 68 case 'n': 69 name = optarg; 70 break; 71 case 'p': 72 proto = optarg; 73 break; 74 default: 75 usage(); 76 } 77 } 78 79 if (proto && name) 80 usage(); 81 if (proto) { 82 if ((prp = getprotobynumber(atoi(proto))) != NULL) 83 pserv(prp); 84 return 0; 85 } 86 if (name) { 87 if ((prp = getprotobyname(name)) != NULL) 88 pserv(prp); 89 return 0; 90 } 91 92 setprotoent(0); 93 while ((prp = getprotoent()) != NULL) 94 pserv(prp); 95 endprotoent(); 96 return 0; 97 } 98