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 rcsid[] = "$OpenBSD: getservent.c,v 1.5 1999/09/03 16:23:19 millert Exp $"; 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, *cp, **q, *endp; 78 long l; 79 size_t len; 80 81 if (servf == NULL && (servf = fopen(_PATH_SERVICES, "r" )) == NULL) 82 return (NULL); 83 again: 84 if ((p = fgetln(servf, &len)) == NULL) 85 return (NULL); 86 if (p[len-1] == '\n') 87 len--; 88 if (len >= sizeof(line) || len == 0) 89 goto again; 90 p = memcpy(line, p, len); 91 line[len] = '\0'; 92 if (*p == '#') 93 goto again; 94 if ((cp = strchr(p, '#')) != NULL) 95 *cp = '\0'; 96 serv.s_name = p; 97 p = strpbrk(p, " \t"); 98 if (p == NULL) 99 goto again; 100 *p++ = '\0'; 101 while (*p == ' ' || *p == '\t') 102 p++; 103 cp = strpbrk(p, ",/"); 104 if (cp == NULL) 105 goto again; 106 *cp++ = '\0'; 107 l = strtol(p, &endp, 10); 108 if (endp == p || *endp != '\0' || l < 0 || l > USHRT_MAX) 109 goto again; 110 serv.s_port = htons((in_port_t)l); 111 serv.s_proto = cp; 112 q = serv.s_aliases = serv_aliases; 113 cp = strpbrk(cp, " \t"); 114 if (cp != NULL) 115 *cp++ = '\0'; 116 while (cp && *cp) { 117 if (*cp == ' ' || *cp == '\t') { 118 cp++; 119 continue; 120 } 121 if (q < &serv_aliases[MAXALIASES - 1]) 122 *q++ = cp; 123 cp = strpbrk(cp, " \t"); 124 if (cp != NULL) 125 *cp++ = '\0'; 126 } 127 *q = NULL; 128 return (&serv); 129 } 130