1 /* 2 * Copyright (c) 1983 Regents of the University of California. 3 * 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 34 #if defined(LIBC_SCCS) && !defined(lint) 35 /*static char *sccsid = "from: @(#)getservent.c 5.9 (Berkeley) 2/24/91";*/ 36 static char *rcsid = "$Id: getservent.c,v 1.3 1993/08/26 00:46:00 jtc Exp $"; 37 #endif /* LIBC_SCCS and not lint */ 38 39 #include <sys/types.h> 40 #include <sys/socket.h> 41 #include <netdb.h> 42 #include <stdio.h> 43 #include <string.h> 44 #include <stdlib.h> 45 46 #define MAXALIASES 35 47 48 static FILE *servf = NULL; 49 static char line[BUFSIZ+1]; 50 static struct servent serv; 51 static char *serv_aliases[MAXALIASES]; 52 int _serv_stayopen; 53 54 void 55 setservent(f) 56 int f; 57 { 58 if (servf == NULL) 59 servf = fopen(_PATH_SERVICES, "r" ); 60 else 61 rewind(servf); 62 _serv_stayopen |= f; 63 } 64 65 void 66 endservent() 67 { 68 if (servf) { 69 fclose(servf); 70 servf = NULL; 71 } 72 _serv_stayopen = 0; 73 } 74 75 struct servent * 76 getservent() 77 { 78 char *p; 79 register char *cp, **q; 80 81 if (servf == NULL && (servf = fopen(_PATH_SERVICES, "r" )) == NULL) 82 return (NULL); 83 again: 84 if ((p = fgets(line, BUFSIZ, servf)) == NULL) 85 return (NULL); 86 if (*p == '#') 87 goto again; 88 cp = strpbrk(p, "#\n"); 89 if (cp == NULL) 90 goto again; 91 *cp = '\0'; 92 serv.s_name = p; 93 p = strpbrk(p, " \t"); 94 if (p == NULL) 95 goto again; 96 *p++ = '\0'; 97 while (*p == ' ' || *p == '\t') 98 p++; 99 cp = strpbrk(p, ",/"); 100 if (cp == NULL) 101 goto again; 102 *cp++ = '\0'; 103 serv.s_port = htons((u_short)atoi(p)); 104 serv.s_proto = cp; 105 q = serv.s_aliases = serv_aliases; 106 cp = strpbrk(cp, " \t"); 107 if (cp != NULL) 108 *cp++ = '\0'; 109 while (cp && *cp) { 110 if (*cp == ' ' || *cp == '\t') { 111 cp++; 112 continue; 113 } 114 if (q < &serv_aliases[MAXALIASES - 1]) 115 *q++ = cp; 116 cp = strpbrk(cp, " \t"); 117 if (cp != NULL) 118 *cp++ = '\0'; 119 } 120 *q = NULL; 121 return (&serv); 122 } 123