1 /* $NetBSD: getprotoent.c,v 1.4 1995/02/25 06:20:35 cgd 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 #if defined(LIBC_SCCS) && !defined(lint) 37 #if 0 38 static char sccsid[] = "@(#)getprotoent.c 8.1 (Berkeley) 6/4/93"; 39 #else 40 static char rcsid[] = "$NetBSD: getprotoent.c,v 1.4 1995/02/25 06:20:35 cgd Exp $"; 41 #endif 42 #endif /* LIBC_SCCS and not lint */ 43 44 #include <sys/types.h> 45 #include <sys/socket.h> 46 #include <netdb.h> 47 #include <stdio.h> 48 #include <stdlib.h> 49 #include <string.h> 50 51 #define MAXALIASES 35 52 53 static FILE *protof = NULL; 54 static char line[BUFSIZ+1]; 55 static struct protoent proto; 56 static char *proto_aliases[MAXALIASES]; 57 int _proto_stayopen; 58 59 void 60 setprotoent(f) 61 int f; 62 { 63 if (protof == NULL) 64 protof = fopen(_PATH_PROTOCOLS, "r" ); 65 else 66 rewind(protof); 67 _proto_stayopen |= f; 68 } 69 70 void 71 endprotoent() 72 { 73 if (protof) { 74 fclose(protof); 75 protof = NULL; 76 } 77 _proto_stayopen = 0; 78 } 79 80 struct protoent * 81 getprotoent() 82 { 83 char *p; 84 register char *cp, **q; 85 86 if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL) 87 return (NULL); 88 again: 89 if ((p = fgets(line, BUFSIZ, protof)) == NULL) 90 return (NULL); 91 if (*p == '#') 92 goto again; 93 cp = strpbrk(p, "#\n"); 94 if (cp == NULL) 95 goto again; 96 *cp = '\0'; 97 proto.p_name = p; 98 cp = strpbrk(p, " \t"); 99 if (cp == NULL) 100 goto again; 101 *cp++ = '\0'; 102 while (*cp == ' ' || *cp == '\t') 103 cp++; 104 p = strpbrk(cp, " \t"); 105 if (p != NULL) 106 *p++ = '\0'; 107 proto.p_proto = atoi(cp); 108 q = proto.p_aliases = proto_aliases; 109 if (p != NULL) { 110 cp = p; 111 while (cp && *cp) { 112 if (*cp == ' ' || *cp == '\t') { 113 cp++; 114 continue; 115 } 116 if (q < &proto_aliases[MAXALIASES - 1]) 117 *q++ = cp; 118 cp = strpbrk(cp, " \t"); 119 if (cp != NULL) 120 *cp++ = '\0'; 121 } 122 } 123 *q = NULL; 124 return (&proto); 125 } 126