getprotoent.c revision 1573
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 */ 371573Srgrimes 381573Srgrimes#include <sys/types.h> 391573Srgrimes#include <sys/socket.h> 401573Srgrimes#include <netdb.h> 411573Srgrimes#include <stdio.h> 421573Srgrimes#include <stdlib.h> 431573Srgrimes#include <string.h> 441573Srgrimes 451573Srgrimes#define MAXALIASES 35 461573Srgrimes 471573Srgrimesstatic FILE *protof = NULL; 481573Srgrimesstatic char line[BUFSIZ+1]; 491573Srgrimesstatic struct protoent proto; 501573Srgrimesstatic char *proto_aliases[MAXALIASES]; 511573Srgrimesint _proto_stayopen; 521573Srgrimes 531573Srgrimesvoid 541573Srgrimessetprotoent(f) 551573Srgrimes int f; 561573Srgrimes{ 571573Srgrimes if (protof == NULL) 581573Srgrimes protof = fopen(_PATH_PROTOCOLS, "r" ); 591573Srgrimes else 601573Srgrimes rewind(protof); 611573Srgrimes _proto_stayopen |= f; 621573Srgrimes} 631573Srgrimes 641573Srgrimesvoid 651573Srgrimesendprotoent() 661573Srgrimes{ 671573Srgrimes if (protof) { 681573Srgrimes fclose(protof); 691573Srgrimes protof = NULL; 701573Srgrimes } 711573Srgrimes _proto_stayopen = 0; 721573Srgrimes} 731573Srgrimes 741573Srgrimesstruct protoent * 751573Srgrimesgetprotoent() 761573Srgrimes{ 771573Srgrimes char *p; 781573Srgrimes register char *cp, **q; 791573Srgrimes 801573Srgrimes if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL) 811573Srgrimes return (NULL); 821573Srgrimesagain: 831573Srgrimes if ((p = fgets(line, BUFSIZ, protof)) == NULL) 841573Srgrimes return (NULL); 851573Srgrimes if (*p == '#') 861573Srgrimes goto again; 871573Srgrimes cp = strpbrk(p, "#\n"); 881573Srgrimes if (cp == NULL) 891573Srgrimes goto again; 901573Srgrimes *cp = '\0'; 911573Srgrimes proto.p_name = p; 921573Srgrimes cp = strpbrk(p, " \t"); 931573Srgrimes if (cp == NULL) 941573Srgrimes goto again; 951573Srgrimes *cp++ = '\0'; 961573Srgrimes while (*cp == ' ' || *cp == '\t') 971573Srgrimes cp++; 981573Srgrimes p = strpbrk(cp, " \t"); 991573Srgrimes if (p != NULL) 1001573Srgrimes *p++ = '\0'; 1011573Srgrimes proto.p_proto = atoi(cp); 1021573Srgrimes q = proto.p_aliases = proto_aliases; 1031573Srgrimes if (p != NULL) { 1041573Srgrimes cp = p; 1051573Srgrimes while (cp && *cp) { 1061573Srgrimes if (*cp == ' ' || *cp == '\t') { 1071573Srgrimes cp++; 1081573Srgrimes continue; 1091573Srgrimes } 1101573Srgrimes if (q < &proto_aliases[MAXALIASES - 1]) 1111573Srgrimes *q++ = cp; 1121573Srgrimes cp = strpbrk(cp, " \t"); 1131573Srgrimes if (cp != NULL) 1141573Srgrimes *cp++ = '\0'; 1151573Srgrimes } 1161573Srgrimes } 1171573Srgrimes *q = NULL; 1181573Srgrimes return (&proto); 1191573Srgrimes} 120