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 34 #if defined(LIBC_SCCS) && !defined(lint) 35 static char sccsid[] = "@(#)getservent.c 8.1 (Berkeley) 6/4/93"; 36 #endif /* LIBC_SCCS and not lint */ 37 38 #include <sys/types.h> 39 #include <sys/socket.h> 40 #include <netdb.h> 41 #include <stdio.h> 42 #include <string.h> 43 #include <stdlib.h> 44 45 #define MAXALIASES 35 46 47 static FILE *servf = NULL; 48 static char line[BUFSIZ+1]; 49 static struct servent serv; 50 static char *serv_aliases[MAXALIASES]; 51 int _serv_stayopen; 52 53 void 54 setservent(f) 55 int f; 56 { 57 if (servf == NULL) 58 servf = fopen(_PATH_SERVICES, "r" ); 59 else 60 rewind(servf); 61 _serv_stayopen |= f; 62 } 63 64 void 65 endservent() 66 { 67 if (servf) { 68 fclose(servf); 69 servf = NULL; 70 } 71 _serv_stayopen = 0; 72 } 73 74 struct servent * 75 getservent() 76 { 77 char *p; 78 register char *cp, **q; 79 80 if (servf == NULL && (servf = fopen(_PATH_SERVICES, "r" )) == NULL) 81 return (NULL); 82 again: 83 if ((p = fgets(line, BUFSIZ, servf)) == NULL) 84 return (NULL); 85 if (*p == '#') 86 goto again; 87 cp = strpbrk(p, "#\n"); 88 if (cp == NULL) 89 goto again; 90 *cp = '\0'; 91 serv.s_name = p; 92 p = strpbrk(p, " \t"); 93 if (p == NULL) 94 goto again; 95 *p++ = '\0'; 96 while (*p == ' ' || *p == '\t') 97 p++; 98 cp = strpbrk(p, ",/"); 99 if (cp == NULL) 100 goto again; 101 *cp++ = '\0'; 102 serv.s_port = htons((u_short)atoi(p)); 103 serv.s_proto = cp; 104 q = serv.s_aliases = serv_aliases; 105 cp = strpbrk(cp, " \t"); 106 if (cp != NULL) 107 *cp++ = '\0'; 108 while (cp && *cp) { 109 if (*cp == ' ' || *cp == '\t') { 110 cp++; 111 continue; 112 } 113 if (q < &serv_aliases[MAXALIASES - 1]) 114 *q++ = cp; 115 cp = strpbrk(cp, " \t"); 116 if (cp != NULL) 117 *cp++ = '\0'; 118 } 119 *q = NULL; 120 return (&serv); 121 } 122