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 * @(#)getprotoent.c 8.1 (Berkeley) 6/4/93 34 * $DragonFly: src/lib/libc/net/getprotoent.c,v 1.3 2004/10/25 19:38:01 drhodus Exp $ 35 */ 36 37 #include <sys/types.h> 38 #include <sys/socket.h> 39 #include <netdb.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <string.h> 43 44 #define MAXALIASES 35 45 46 static FILE *protof = NULL; 47 static char line[BUFSIZ+1]; 48 static struct protoent proto; 49 static char *proto_aliases[MAXALIASES]; 50 int _proto_stayopen; 51 52 void 53 setprotoent(f) 54 int f; 55 { 56 if (protof == NULL) 57 protof = fopen(_PATH_PROTOCOLS, "r" ); 58 else 59 rewind(protof); 60 _proto_stayopen |= f; 61 } 62 63 void 64 endprotoent() 65 { 66 if (protof) { 67 fclose(protof); 68 protof = NULL; 69 } 70 _proto_stayopen = 0; 71 } 72 73 struct protoent * 74 getprotoent() 75 { 76 char *p; 77 char *cp, **q; 78 79 if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL) 80 return (NULL); 81 again: 82 if ((p = fgets(line, BUFSIZ, protof)) == NULL) 83 return (NULL); 84 if (*p == '#') 85 goto again; 86 cp = strpbrk(p, "#\n"); 87 if (cp == NULL) 88 goto again; 89 *cp = '\0'; 90 proto.p_name = p; 91 cp = strpbrk(p, " \t"); 92 if (cp == NULL) 93 goto again; 94 *cp++ = '\0'; 95 while (*cp == ' ' || *cp == '\t') 96 cp++; 97 p = strpbrk(cp, " \t"); 98 if (p != NULL) 99 *p++ = '\0'; 100 proto.p_proto = atoi(cp); 101 q = proto.p_aliases = proto_aliases; 102 if (p != NULL) { 103 cp = p; 104 while (cp && *cp) { 105 if (*cp == ' ' || *cp == '\t') { 106 cp++; 107 continue; 108 } 109 if (q < &proto_aliases[MAXALIASES - 1]) 110 *q++ = cp; 111 cp = strpbrk(cp, " \t"); 112 if (cp != NULL) 113 *cp++ = '\0'; 114 } 115 } 116 *q = NULL; 117 return (&proto); 118 } 119