152 lines
4.0 KiB
C
152 lines
4.0 KiB
C
/* $NetBSD: getprotoent_r.c,v 1.4 2004/02/25 06:28:10 taca Exp $ */
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/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. 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. 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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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)getprotoent.c 8.1 (Berkeley) 6/4/93";
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#else
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__RCSID("$NetBSD: getprotoent_r.c,v 1.4 2004/02/25 06:28:10 taca Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <netdb.h>
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#include <stdio.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef __weak_alias
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__weak_alias(endprotoent_r,_endprotoent_r)
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__weak_alias(getprotoent_r,_getprotoent_r)
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__weak_alias(setprotoent_r,_setprotoent_r)
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#endif
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void
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setprotoent_r(int f, struct protoent_data *pd)
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{
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if (pd->fp == NULL)
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pd->fp = fopen(_PATH_PROTOCOLS, "r");
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else
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rewind(pd->fp);
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pd->stayopen |= f;
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}
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void
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endprotoent_r(struct protoent_data *pd)
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{
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if (pd->fp) {
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(void)fclose(pd->fp);
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pd->fp = NULL;
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}
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if (pd->aliases) {
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free(pd->aliases);
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pd->aliases = NULL;
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pd->maxaliases = 0;
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}
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if (pd->line) {
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free(pd->line);
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pd->line = NULL;
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}
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pd->stayopen = 0;
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}
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struct protoent *
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getprotoent_r(struct protoent *pr, struct protoent_data *pd)
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{
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char *p, *cp, **q;
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size_t i = 0;
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int oerrno;
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if (pd->fp == NULL && (pd->fp = fopen(_PATH_PROTOCOLS, "r")) == NULL)
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return NULL;
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for (;;) {
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if (pd->line)
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free(pd->line);
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pd->line = fparseln(pd->fp, NULL, NULL, NULL,
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FPARSELN_UNESCALL);
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if (pd->line == NULL)
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return NULL;
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pr->p_name = p = pd->line;
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cp = strpbrk(p, " \t");
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if (cp == NULL)
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continue;
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*cp++ = '\0';
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while (*cp == ' ' || *cp == '\t')
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cp++;
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p = strpbrk(cp, " \t");
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if (p != NULL)
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*p++ = '\0';
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pr->p_proto = atoi(cp);
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if (pd->aliases == NULL) {
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pd->maxaliases = 10;
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pd->aliases = malloc(pd->maxaliases * sizeof(char *));
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if (pd->aliases == NULL) {
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oerrno = errno;
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endprotoent_r(pd);
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errno = oerrno;
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return NULL;
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}
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}
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q = pr->p_aliases = pd->aliases;
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if (p != NULL) {
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cp = p;
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while (cp && *cp) {
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if (*cp == ' ' || *cp == '\t') {
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cp++;
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continue;
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}
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if (i == pd->maxaliases - 2) {
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pd->maxaliases *= 2;
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q = realloc(q,
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pd->maxaliases * sizeof(char *));
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if (q == NULL) {
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oerrno = errno;
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endprotoent_r(pd);
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errno = oerrno;
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return NULL;
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}
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pr->p_aliases = pd->aliases = q;
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}
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q[i++] = cp;
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cp = strpbrk(cp, " \t");
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if (cp != NULL)
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*cp++ = '\0';
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}
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}
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q[i] = NULL;
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return pr;
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}
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}
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