1 /* $NetBSD: getservent.c,v 1.4 1995/02/25 06:20:38 cgd 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 #if defined(LIBC_SCCS) && !defined(lint) 37 #if 0 38 static char sccsid[] = "@(#)getservent.c 8.1 (Berkeley) 6/4/93"; 39 #else 40 static char rcsid[] = "$NetBSD: getservent.c,v 1.4 1995/02/25 06:20:38 cgd Exp $"; 41 #endif 42 #endif /* LIBC_SCCS and not lint */ 43 44 #include <sys/types.h> 45 #include <sys/socket.h> 46 #include <netdb.h> 47 #include <stdio.h> 48 #include <string.h> 49 #include <stdlib.h> 50 51 #define MAXALIASES 35 52 53 static FILE *servf = NULL; 54 static char line[BUFSIZ+1]; 55 static struct servent serv; 56 static char *serv_aliases[MAXALIASES]; 57 int _serv_stayopen; 58 59 void 60 setservent(f) 61 int f; 62 { 63 if (servf == NULL) 64 servf = fopen(_PATH_SERVICES, "r" ); 65 else 66 rewind(servf); 67 _serv_stayopen |= f; 68 } 69 70 void 71 endservent() 72 { 73 if (servf) { 74 fclose(servf); 75 servf = NULL; 76 } 77 _serv_stayopen = 0; 78 } 79 80 struct servent * 81 getservent() 82 { 83 char *p; 84 register char *cp, **q; 85 86 if (servf == NULL && (servf = fopen(_PATH_SERVICES, "r" )) == NULL) 87 return (NULL); 88 again: 89 if ((p = fgets(line, BUFSIZ, servf)) == NULL) 90 return (NULL); 91 if (*p == '#') 92 goto again; 93 cp = strpbrk(p, "#\n"); 94 if (cp == NULL) 95 goto again; 96 *cp = '\0'; 97 serv.s_name = p; 98 p = strpbrk(p, " \t"); 99 if (p == NULL) 100 goto again; 101 *p++ = '\0'; 102 while (*p == ' ' || *p == '\t') 103 p++; 104 cp = strpbrk(p, ",/"); 105 if (cp == NULL) 106 goto again; 107 *cp++ = '\0'; 108 serv.s_port = htons((u_short)atoi(p)); 109 serv.s_proto = cp; 110 q = serv.s_aliases = serv_aliases; 111 cp = strpbrk(cp, " \t"); 112 if (cp != NULL) 113 *cp++ = '\0'; 114 while (cp && *cp) { 115 if (*cp == ' ' || *cp == '\t') { 116 cp++; 117 continue; 118 } 119 if (q < &serv_aliases[MAXALIASES - 1]) 120 *q++ = cp; 121 cp = strpbrk(cp, " \t"); 122 if (cp != NULL) 123 *cp++ = '\0'; 124 } 125 *q = NULL; 126 return (&serv); 127 } 128