1 /* $NetBSD: getservent.c,v 1.8 2003/08/07 16:43:10 agc 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #if defined(LIBC_SCCS) && !defined(lint) 34 #if 0 35 static char sccsid[] = "@(#)getservent.c 8.1 (Berkeley) 6/4/93"; 36 #else 37 __RCSID("$NetBSD: getservent.c,v 1.8 2003/08/07 16:43:10 agc Exp $"); 38 #endif 39 #endif /* LIBC_SCCS and not lint */ 40 41 #include "namespace.h" 42 #include <sys/types.h> 43 #include <sys/socket.h> 44 #include <netdb.h> 45 #include <stdio.h> 46 #include <string.h> 47 #include <stdlib.h> 48 49 #ifdef __weak_alias 50 __weak_alias(endservent,_endservent) 51 __weak_alias(getservent,_getservent) 52 __weak_alias(setservent,_setservent) 53 #endif 54 55 #define MAXALIASES 35 56 57 static FILE *servf = NULL; 58 static char line[BUFSIZ+1]; 59 static struct servent serv; 60 static char *serv_aliases[MAXALIASES]; 61 int _serv_stayopen; 62 63 void 64 setservent(f) 65 int f; 66 { 67 if (servf == NULL) 68 servf = fopen(_PATH_SERVICES, "r" ); 69 else 70 rewind(servf); 71 _serv_stayopen |= f; 72 } 73 74 void 75 endservent() 76 { 77 if (servf) { 78 fclose(servf); 79 servf = NULL; 80 } 81 _serv_stayopen = 0; 82 } 83 84 struct servent * 85 getservent() 86 { 87 char *p; 88 register char *cp, **q; 89 90 if (servf == NULL && (servf = fopen(_PATH_SERVICES, "r" )) == NULL) 91 return (NULL); 92 again: 93 if ((p = fgets(line, BUFSIZ, servf)) == NULL) 94 return (NULL); 95 if (*p == '#') 96 goto again; 97 cp = strpbrk(p, "#\n"); 98 if (cp == NULL) 99 goto again; 100 *cp = '\0'; 101 serv.s_name = p; 102 p = strpbrk(p, " \t"); 103 if (p == NULL) 104 goto again; 105 *p++ = '\0'; 106 while (*p == ' ' || *p == '\t') 107 p++; 108 cp = strpbrk(p, ",/"); 109 if (cp == NULL) 110 goto again; 111 *cp++ = '\0'; 112 serv.s_port = htons((u_short)atoi(p)); 113 serv.s_proto = cp; 114 q = serv.s_aliases = serv_aliases; 115 cp = strpbrk(cp, " \t"); 116 if (cp != NULL) 117 *cp++ = '\0'; 118 while (cp && *cp) { 119 if (*cp == ' ' || *cp == '\t') { 120 cp++; 121 continue; 122 } 123 if (q < &serv_aliases[MAXALIASES - 1]) 124 *q++ = cp; 125 cp = strpbrk(cp, " \t"); 126 if (cp != NULL) 127 *cp++ = '\0'; 128 } 129 *q = NULL; 130 return (&serv); 131 } 132