1 /* $NetBSD: getprotoent.c,v 1.8 2003/08/07 16:43:09 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. 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 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char sccsid[] = "@(#)getprotoent.c 8.1 (Berkeley) 6/4/93"; 36 #else 37 __RCSID("$NetBSD: getprotoent.c,v 1.8 2003/08/07 16:43:09 agc Exp $"); 38 #endif 39 #endif /* LIBC_SCCS and not lint */ 40 41 #include "namespace.h" 42 #include <sys/types.h> 43 #include <sys/socket.h> 44 #include <netdb.h> 45 #include <stdio.h> 46 #include <stdlib.h> 47 #include <string.h> 48 49 #ifdef __weak_alias 50 __weak_alias(endprotoent,_endprotoent) 51 __weak_alias(getprotoent,_getprotoent) 52 __weak_alias(setprotoent,_setprotoent) 53 #endif 54 55 #define MAXALIASES 35 56 57 static FILE *protof = NULL; 58 static char line[BUFSIZ+1]; 59 static struct protoent proto; 60 static char *proto_aliases[MAXALIASES]; 61 int _proto_stayopen; 62 63 void 64 setprotoent(f) 65 int f; 66 { 67 if (protof == NULL) 68 protof = fopen(_PATH_PROTOCOLS, "r" ); 69 else 70 rewind(protof); 71 _proto_stayopen |= f; 72 } 73 74 void 75 endprotoent() 76 { 77 if (protof) { 78 fclose(protof); 79 protof = NULL; 80 } 81 _proto_stayopen = 0; 82 } 83 84 struct protoent * 85 getprotoent() 86 { 87 char *p; 88 register char *cp, **q; 89 90 if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL) 91 return (NULL); 92 again: 93 if ((p = fgets(line, BUFSIZ, protof)) == NULL) 94 return (NULL); 95 if (*p == '#') 96 goto again; 97 cp = strpbrk(p, "#\n"); 98 if (cp == NULL) 99 goto again; 100 *cp = '\0'; 101 proto.p_name = p; 102 cp = strpbrk(p, " \t"); 103 if (cp == NULL) 104 goto again; 105 *cp++ = '\0'; 106 while (*cp == ' ' || *cp == '\t') 107 cp++; 108 p = strpbrk(cp, " \t"); 109 if (p != NULL) 110 *p++ = '\0'; 111 proto.p_proto = atoi(cp); 112 q = proto.p_aliases = proto_aliases; 113 if (p != NULL) { 114 cp = p; 115 while (cp && *cp) { 116 if (*cp == ' ' || *cp == '\t') { 117 cp++; 118 continue; 119 } 120 if (q < &proto_aliases[MAXALIASES - 1]) 121 *q++ = cp; 122 cp = strpbrk(cp, " \t"); 123 if (cp != NULL) 124 *cp++ = '\0'; 125 } 126 } 127 *q = NULL; 128 return (&proto); 129 } 130