getprotoent.c revision 139612
11573Srgrimes/* 21573Srgrimes * Copyright (c) 1983, 1993 31573Srgrimes * The Regents of the University of California. All rights reserved. 41573Srgrimes * 51573Srgrimes * Redistribution and use in source and binary forms, with or without 61573Srgrimes * modification, are permitted provided that the following conditions 71573Srgrimes * are met: 81573Srgrimes * 1. Redistributions of source code must retain the above copyright 91573Srgrimes * notice, this list of conditions and the following disclaimer. 101573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 111573Srgrimes * notice, this list of conditions and the following disclaimer in the 121573Srgrimes * documentation and/or other materials provided with the distribution. 131573Srgrimes * 3. All advertising materials mentioning features or use of this software 141573Srgrimes * must display the following acknowledgement: 151573Srgrimes * This product includes software developed by the University of 161573Srgrimes * California, Berkeley and its contributors. 171573Srgrimes * 4. Neither the name of the University nor the names of its contributors 181573Srgrimes * may be used to endorse or promote products derived from this software 191573Srgrimes * without specific prior written permission. 201573Srgrimes * 211573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 221573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 231573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 241573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 261573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 271573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 281573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 291573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 301573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 311573Srgrimes * SUCH DAMAGE. 321573Srgrimes */ 331573Srgrimes 341573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 351573Srgrimesstatic char sccsid[] = "@(#)getprotoent.c 8.1 (Berkeley) 6/4/93"; 361573Srgrimes#endif /* LIBC_SCCS and not lint */ 3792889Sobrien#include <sys/cdefs.h> 3892889Sobrien__FBSDID("$FreeBSD: head/lib/libc/net/getprotoent.c 139612 2005-01-03 11:07:45Z sobomax $"); 391573Srgrimes 401573Srgrimes#include <sys/types.h> 411573Srgrimes#include <sys/socket.h> 421573Srgrimes#include <netdb.h> 431573Srgrimes#include <stdio.h> 441573Srgrimes#include <stdlib.h> 451573Srgrimes#include <string.h> 461573Srgrimes 471573Srgrimes#define MAXALIASES 35 481573Srgrimes 491573Srgrimesstatic FILE *protof = NULL; 501573Srgrimesstatic char line[BUFSIZ+1]; 511573Srgrimesstatic struct protoent proto; 521573Srgrimesstatic char *proto_aliases[MAXALIASES]; 531573Srgrimesint _proto_stayopen; 541573Srgrimes 551573Srgrimesvoid 561573Srgrimessetprotoent(f) 571573Srgrimes int f; 581573Srgrimes{ 591573Srgrimes if (protof == NULL) 601573Srgrimes protof = fopen(_PATH_PROTOCOLS, "r" ); 611573Srgrimes else 621573Srgrimes rewind(protof); 631573Srgrimes _proto_stayopen |= f; 641573Srgrimes} 651573Srgrimes 661573Srgrimesvoid 671573Srgrimesendprotoent() 681573Srgrimes{ 691573Srgrimes if (protof) { 701573Srgrimes fclose(protof); 711573Srgrimes protof = NULL; 721573Srgrimes } 731573Srgrimes _proto_stayopen = 0; 741573Srgrimes} 751573Srgrimes 761573Srgrimesstruct protoent * 771573Srgrimesgetprotoent() 781573Srgrimes{ 791573Srgrimes char *p; 8092889Sobrien char *cp, **q; 811573Srgrimes 821573Srgrimes if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL) 831573Srgrimes return (NULL); 841573Srgrimesagain: 851573Srgrimes if ((p = fgets(line, BUFSIZ, protof)) == NULL) 861573Srgrimes return (NULL); 871573Srgrimes if (*p == '#') 881573Srgrimes goto again; 891573Srgrimes cp = strpbrk(p, "#\n"); 90139612Ssobomax if (cp != NULL) 91139612Ssobomax *cp = '\0'; 921573Srgrimes proto.p_name = p; 931573Srgrimes cp = strpbrk(p, " \t"); 941573Srgrimes if (cp == NULL) 951573Srgrimes goto again; 961573Srgrimes *cp++ = '\0'; 971573Srgrimes while (*cp == ' ' || *cp == '\t') 981573Srgrimes cp++; 991573Srgrimes p = strpbrk(cp, " \t"); 1001573Srgrimes if (p != NULL) 1011573Srgrimes *p++ = '\0'; 1021573Srgrimes proto.p_proto = atoi(cp); 1031573Srgrimes q = proto.p_aliases = proto_aliases; 1041573Srgrimes if (p != NULL) { 1051573Srgrimes cp = p; 1061573Srgrimes while (cp && *cp) { 1071573Srgrimes if (*cp == ' ' || *cp == '\t') { 1081573Srgrimes cp++; 1091573Srgrimes continue; 1101573Srgrimes } 1111573Srgrimes if (q < &proto_aliases[MAXALIASES - 1]) 1121573Srgrimes *q++ = cp; 1131573Srgrimes cp = strpbrk(cp, " \t"); 1141573Srgrimes if (cp != NULL) 1151573Srgrimes *cp++ = '\0'; 1161573Srgrimes } 1171573Srgrimes } 1181573Srgrimes *q = NULL; 1191573Srgrimes return (&proto); 1201573Srgrimes} 121