mirror of
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143 lines
4.1 KiB
C
143 lines
4.1 KiB
C
/*
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* Copyright (c) 1983 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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/*static char *sccsid = "from: @(#)getprotoent.c 5.8 (Berkeley) 2/24/91";*/
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static char *rcsid = "$Id$";
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#endif /* LIBC_SCCS and not lint */
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#include <pthread.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include "proto_internal.h"
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static pthread_mutex_t proto_file_lock = PTHREAD_MUTEX_INITIALIZER;
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static int proto_file_stayopen;
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static FILE *proto_file;
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void setprotoent(int stayopen)
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{
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pthread_mutex_lock(&proto_file_lock);
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proto_file_stayopen |= stayopen;
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if (proto_file)
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rewind(proto_file);
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else
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proto_file = fopen(_PATH_PROTOCOLS, "r");
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pthread_mutex_unlock(&proto_file_lock);
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}
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void endprotoent()
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{
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pthread_mutex_lock(&proto_file_lock);
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if (proto_file)
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fclose(proto_file);
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pthread_mutex_unlock(&proto_file_lock);
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}
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struct protoent *getprotoent()
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{
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char *buf = _proto_buf();
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return getprotoent_r((struct protoent *) buf,
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buf + sizeof(struct protoent), PROTO_BUFSIZE);
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}
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struct protoent *getprotoent_r(struct protoent *result, char *buf, int bufsize)
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{
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char *p, *q, **alias;
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int l;
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errno = 0;
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pthread_mutex_lock(&proto_file_lock);
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if (proto_file == NULL && !(proto_file = fopen(_PATH_PROTOCOLS, "r"))) {
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pthread_mutex_unlock(&proto_file_lock);
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return NULL;
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}
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while (fgets(buf, bufsize, proto_file)) {
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if (*buf == '#')
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continue;
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p = strpbrk(buf, "#\n");
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if (p == NULL)
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continue;
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*p = '\0';
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l = strlen(buf) + 1;
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result->p_name = buf;
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p = strpbrk(buf, " \t");
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if (p == NULL)
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continue;
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*p++ = '\0';
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while (*p == ' ' || *p == '\t')
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p++;
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q = strpbrk(p, " \t");
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if (q != NULL)
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*q++ = '\0';
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if (SP(SP(buf, char, l), char *, 1) > buf + bufsize) {
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errno = ERANGE;
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break;
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}
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result->p_proto = atoi(p);
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result->p_aliases = (char **) ALIGN(buf + l, char *);
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alias = result->p_aliases;
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if (q != NULL) {
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p = q;
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while (p && *p) {
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if (*p == ' ' || *p == '\t') {
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p++;
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continue;
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}
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if ((char *) &alias[2] > buf + bufsize) {
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errno = ERANGE;
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break;
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}
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*alias++ = p;
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p = strpbrk(p, " \t");
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if (p != NULL)
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*p++ = '\0';
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}
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if (p && *p)
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break;
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}
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*alias = NULL;
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pthread_mutex_unlock(&proto_file_lock);
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return result;
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}
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pthread_mutex_unlock(&proto_file_lock);
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return NULL;
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}
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