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 sccsid[] = "@(#)getprotoent.c 8.1 (Berkeley) 6/4/93"; 36 #endif /* LIBC_SCCS and not lint */ 37 #include <sys/cdefs.h> 38 __FBSDID("$FreeBSD$"); 39 40 #include <sys/types.h> 41 #include <sys/socket.h> 42 #include <netdb.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <string.h> 46 47 #define MAXALIASES 35 48 49 static FILE *protof = NULL; 50 static char line[BUFSIZ+1]; 51 static struct protoent proto; 52 static char *proto_aliases[MAXALIASES]; 53 int _proto_stayopen; 54 55 void 56 setprotoent(f) 57 int f; 58 { 59 if (protof == NULL) 60 protof = fopen(_PATH_PROTOCOLS, "r" ); 61 else 62 rewind(protof); 63 _proto_stayopen |= f; 64 } 65 66 void 67 endprotoent() 68 { 69 if (protof) { 70 fclose(protof); 71 protof = NULL; 72 } 73 _proto_stayopen = 0; 74 } 75 76 struct protoent * 77 getprotoent() 78 { 79 char *p; 80 char *cp, **q; 81 82 if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL) 83 return (NULL); 84 again: 85 if ((p = fgets(line, BUFSIZ, protof)) == NULL) 86 return (NULL); 87 if (*p == '#') 88 goto again; 89 cp = strpbrk(p, "#\n"); 90 if (cp == NULL) 91 goto again; 92 *cp = '\0'; 93 proto.p_name = p; 94 cp = strpbrk(p, " \t"); 95 if (cp == NULL) 96 goto again; 97 *cp++ = '\0'; 98 while (*cp == ' ' || *cp == '\t') 99 cp++; 100 p = strpbrk(cp, " \t"); 101 if (p != NULL) 102 *p++ = '\0'; 103 proto.p_proto = atoi(cp); 104 q = proto.p_aliases = proto_aliases; 105 if (p != NULL) { 106 cp = p; 107 while (cp && *cp) { 108 if (*cp == ' ' || *cp == '\t') { 109 cp++; 110 continue; 111 } 112 if (q < &proto_aliases[MAXALIASES - 1]) 113 *q++ = cp; 114 cp = strpbrk(cp, " \t"); 115 if (cp != NULL) 116 *cp++ = '\0'; 117 } 118 } 119 *q = NULL; 120 return (&proto); 121 } 122