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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)getprotoent.c 8.1 (Berkeley) 6/4/93 30 * $DragonFly: src/lib/libc/net/getprotoent.c,v 1.5 2005/11/13 02:04:47 swildner Exp $ 31 */ 32 33 #include <sys/types.h> 34 #include <sys/socket.h> 35 #include <netdb.h> 36 #include <stdio.h> 37 #include <stdlib.h> 38 #include <string.h> 39 40 #define MAXALIASES 35 41 42 static FILE *protof = NULL; 43 static char line[BUFSIZ+1]; 44 static struct protoent proto; 45 static char *proto_aliases[MAXALIASES]; 46 int _proto_stayopen; 47 48 void 49 setprotoent(int f) 50 { 51 if (protof == NULL) 52 protof = fopen(_PATH_PROTOCOLS, "r" ); 53 else 54 rewind(protof); 55 _proto_stayopen |= f; 56 } 57 58 void 59 endprotoent(void) 60 { 61 if (protof) { 62 fclose(protof); 63 protof = NULL; 64 } 65 _proto_stayopen = 0; 66 } 67 68 struct protoent * 69 getprotoent(void) 70 { 71 char *p; 72 char *cp, **q; 73 74 if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL) 75 return (NULL); 76 again: 77 if ((p = fgets(line, BUFSIZ, protof)) == NULL) 78 return (NULL); 79 if (*p == '#') 80 goto again; 81 cp = strpbrk(p, "#\n"); 82 if (cp == NULL) 83 goto again; 84 *cp = '\0'; 85 proto.p_name = p; 86 cp = strpbrk(p, " \t"); 87 if (cp == NULL) 88 goto again; 89 *cp++ = '\0'; 90 while (*cp == ' ' || *cp == '\t') 91 cp++; 92 p = strpbrk(cp, " \t"); 93 if (p != NULL) 94 *p++ = '\0'; 95 proto.p_proto = atoi(cp); 96 q = proto.p_aliases = proto_aliases; 97 if (p != NULL) { 98 cp = p; 99 while (cp && *cp) { 100 if (*cp == ' ' || *cp == '\t') { 101 cp++; 102 continue; 103 } 104 if (q < &proto_aliases[MAXALIASES - 1]) 105 *q++ = cp; 106 cp = strpbrk(cp, " \t"); 107 if (cp != NULL) 108 *cp++ = '\0'; 109 } 110 } 111 *q = NULL; 112 return (&proto); 113 } 114