1 /* 2 * Copyright (c) 1983 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #if defined(LIBC_SCCS) && !defined(lint) 35 /*static char *sccsid = "from: @(#)getprotoent.c 5.8 (Berkeley) 2/24/91";*/ 36 static char *rcsid = "$Id: getprotoent.c,v 1.3 1993/08/26 00:45:55 jtc Exp $"; 37 #endif /* LIBC_SCCS and not lint */ 38 39 #include <sys/types.h> 40 #include <sys/socket.h> 41 #include <netdb.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 46 #define MAXALIASES 35 47 48 static FILE *protof = NULL; 49 static char line[BUFSIZ+1]; 50 static struct protoent proto; 51 static char *proto_aliases[MAXALIASES]; 52 int _proto_stayopen; 53 54 void 55 setprotoent(f) 56 int f; 57 { 58 if (protof == NULL) 59 protof = fopen(_PATH_PROTOCOLS, "r" ); 60 else 61 rewind(protof); 62 _proto_stayopen |= f; 63 } 64 65 void 66 endprotoent() 67 { 68 if (protof) { 69 fclose(protof); 70 protof = NULL; 71 } 72 _proto_stayopen = 0; 73 } 74 75 struct protoent * 76 getprotoent() 77 { 78 char *p; 79 register char *cp, **q; 80 81 if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL) 82 return (NULL); 83 again: 84 if ((p = fgets(line, BUFSIZ, protof)) == NULL) 85 return (NULL); 86 if (*p == '#') 87 goto again; 88 cp = strpbrk(p, "#\n"); 89 if (cp == NULL) 90 goto again; 91 *cp = '\0'; 92 proto.p_name = p; 93 cp = strpbrk(p, " \t"); 94 if (cp == NULL) 95 goto again; 96 *cp++ = '\0'; 97 while (*cp == ' ' || *cp == '\t') 98 cp++; 99 p = strpbrk(cp, " \t"); 100 if (p != NULL) 101 *p++ = '\0'; 102 proto.p_proto = atoi(cp); 103 q = proto.p_aliases = proto_aliases; 104 if (p != NULL) { 105 cp = p; 106 while (cp && *cp) { 107 if (*cp == ' ' || *cp == '\t') { 108 cp++; 109 continue; 110 } 111 if (q < &proto_aliases[MAXALIASES - 1]) 112 *q++ = cp; 113 cp = strpbrk(cp, " \t"); 114 if (cp != NULL) 115 *cp++ = '\0'; 116 } 117 } 118 *q = NULL; 119 return (&proto); 120 } 121