1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. 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 rcsid[] = "$OpenBSD: getprotoent.c,v 1.2 1996/08/19 08:28:52 tholo Exp $"; 36 #endif /* LIBC_SCCS and not lint */ 37 38 #include <sys/types.h> 39 #include <sys/socket.h> 40 #include <netdb.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 #define MAXALIASES 35 46 47 static FILE *protof = NULL; 48 static char line[BUFSIZ+1]; 49 static struct protoent proto; 50 static char *proto_aliases[MAXALIASES]; 51 int _proto_stayopen; 52 53 void 54 setprotoent(f) 55 int f; 56 { 57 if (protof == NULL) 58 protof = fopen(_PATH_PROTOCOLS, "r" ); 59 else 60 rewind(protof); 61 _proto_stayopen |= f; 62 } 63 64 void 65 endprotoent() 66 { 67 if (protof) { 68 fclose(protof); 69 protof = NULL; 70 } 71 _proto_stayopen = 0; 72 } 73 74 struct protoent * 75 getprotoent() 76 { 77 char *p; 78 register char *cp, **q; 79 80 if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL) 81 return (NULL); 82 again: 83 if ((p = fgets(line, BUFSIZ, protof)) == NULL) 84 return (NULL); 85 if (*p == '#') 86 goto again; 87 cp = strpbrk(p, "#\n"); 88 if (cp == NULL) 89 goto again; 90 *cp = '\0'; 91 proto.p_name = p; 92 cp = strpbrk(p, " \t"); 93 if (cp == NULL) 94 goto again; 95 *cp++ = '\0'; 96 while (*cp == ' ' || *cp == '\t') 97 cp++; 98 p = strpbrk(cp, " \t"); 99 if (p != NULL) 100 *p++ = '\0'; 101 proto.p_proto = atoi(cp); 102 q = proto.p_aliases = proto_aliases; 103 if (p != NULL) { 104 cp = p; 105 while (cp && *cp) { 106 if (*cp == ' ' || *cp == '\t') { 107 cp++; 108 continue; 109 } 110 if (q < &proto_aliases[MAXALIASES - 1]) 111 *q++ = cp; 112 cp = strpbrk(cp, " \t"); 113 if (cp != NULL) 114 *cp++ = '\0'; 115 } 116 } 117 *q = NULL; 118 return (&proto); 119 } 120