1 /* $NetBSD: getservent.c,v 1.7 2000/01/22 22:19:15 mycroft Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 #if defined(LIBC_SCCS) && !defined(lint) 38 #if 0 39 static char sccsid[] = "@(#)getservent.c 8.1 (Berkeley) 6/4/93"; 40 #else 41 __RCSID("$NetBSD: getservent.c,v 1.7 2000/01/22 22:19:15 mycroft Exp $"); 42 #endif 43 #endif /* LIBC_SCCS and not lint */ 44 45 #include "namespace.h" 46 #include <sys/types.h> 47 #include <sys/socket.h> 48 #include <netdb.h> 49 #include <stdio.h> 50 #include <string.h> 51 #include <stdlib.h> 52 53 #ifdef __weak_alias 54 __weak_alias(endservent,_endservent) 55 __weak_alias(getservent,_getservent) 56 __weak_alias(setservent,_setservent) 57 #endif 58 59 #define MAXALIASES 35 60 61 static FILE *servf = NULL; 62 static char line[BUFSIZ+1]; 63 static struct servent serv; 64 static char *serv_aliases[MAXALIASES]; 65 int _serv_stayopen; 66 67 void 68 setservent(f) 69 int f; 70 { 71 if (servf == NULL) 72 servf = fopen(_PATH_SERVICES, "r" ); 73 else 74 rewind(servf); 75 _serv_stayopen |= f; 76 } 77 78 void 79 endservent() 80 { 81 if (servf) { 82 fclose(servf); 83 servf = NULL; 84 } 85 _serv_stayopen = 0; 86 } 87 88 struct servent * 89 getservent() 90 { 91 char *p; 92 register char *cp, **q; 93 94 if (servf == NULL && (servf = fopen(_PATH_SERVICES, "r" )) == NULL) 95 return (NULL); 96 again: 97 if ((p = fgets(line, BUFSIZ, servf)) == NULL) 98 return (NULL); 99 if (*p == '#') 100 goto again; 101 cp = strpbrk(p, "#\n"); 102 if (cp == NULL) 103 goto again; 104 *cp = '\0'; 105 serv.s_name = p; 106 p = strpbrk(p, " \t"); 107 if (p == NULL) 108 goto again; 109 *p++ = '\0'; 110 while (*p == ' ' || *p == '\t') 111 p++; 112 cp = strpbrk(p, ",/"); 113 if (cp == NULL) 114 goto again; 115 *cp++ = '\0'; 116 serv.s_port = htons((u_short)atoi(p)); 117 serv.s_proto = cp; 118 q = serv.s_aliases = serv_aliases; 119 cp = strpbrk(cp, " \t"); 120 if (cp != NULL) 121 *cp++ = '\0'; 122 while (cp && *cp) { 123 if (*cp == ' ' || *cp == '\t') { 124 cp++; 125 continue; 126 } 127 if (q < &serv_aliases[MAXALIASES - 1]) 128 *q++ = cp; 129 cp = strpbrk(cp, " \t"); 130 if (cp != NULL) 131 *cp++ = '\0'; 132 } 133 *q = NULL; 134 return (&serv); 135 } 136