1 /* $NetBSD: getprotoent.c,v 1.5 1997/07/13 19:57:38 christos 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(LIBC_SCCS) && !defined(lint) 38 #if 0 39 static char sccsid[] = "@(#)getprotoent.c 8.1 (Berkeley) 6/4/93"; 40 #else 41 __RCSID("$NetBSD: getprotoent.c,v 1.5 1997/07/13 19:57:38 christos Exp $"); 42 #endif 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include <sys/types.h> 46 #include <sys/socket.h> 47 #include <netdb.h> 48 #include <stdio.h> 49 #include <stdlib.h> 50 #include <string.h> 51 52 #define MAXALIASES 35 53 54 static FILE *protof = NULL; 55 static char line[BUFSIZ+1]; 56 static struct protoent proto; 57 static char *proto_aliases[MAXALIASES]; 58 int _proto_stayopen; 59 60 void 61 setprotoent(f) 62 int f; 63 { 64 if (protof == NULL) 65 protof = fopen(_PATH_PROTOCOLS, "r" ); 66 else 67 rewind(protof); 68 _proto_stayopen |= f; 69 } 70 71 void 72 endprotoent() 73 { 74 if (protof) { 75 fclose(protof); 76 protof = NULL; 77 } 78 _proto_stayopen = 0; 79 } 80 81 struct protoent * 82 getprotoent() 83 { 84 char *p; 85 register char *cp, **q; 86 87 if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL) 88 return (NULL); 89 again: 90 if ((p = fgets(line, BUFSIZ, protof)) == NULL) 91 return (NULL); 92 if (*p == '#') 93 goto again; 94 cp = strpbrk(p, "#\n"); 95 if (cp == NULL) 96 goto again; 97 *cp = '\0'; 98 proto.p_name = p; 99 cp = strpbrk(p, " \t"); 100 if (cp == NULL) 101 goto again; 102 *cp++ = '\0'; 103 while (*cp == ' ' || *cp == '\t') 104 cp++; 105 p = strpbrk(cp, " \t"); 106 if (p != NULL) 107 *p++ = '\0'; 108 proto.p_proto = atoi(cp); 109 q = proto.p_aliases = proto_aliases; 110 if (p != NULL) { 111 cp = p; 112 while (cp && *cp) { 113 if (*cp == ' ' || *cp == '\t') { 114 cp++; 115 continue; 116 } 117 if (q < &proto_aliases[MAXALIASES - 1]) 118 *q++ = cp; 119 cp = strpbrk(cp, " \t"); 120 if (cp != NULL) 121 *cp++ = '\0'; 122 } 123 } 124 *q = NULL; 125 return (&proto); 126 } 127