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