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