NetBSD/lib/libc/net/getservent_r.c

153 lines
4.0 KiB
C

/* $NetBSD: getservent_r.c,v 1.4 2004/02/25 06:28:10 taca Exp $ */
/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)getservent.c 8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: getservent_r.c,v 1.4 2004/02/25 06:28:10 taca Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <netdb.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#ifdef __weak_alias
__weak_alias(endservent_r,_endservent_r)
__weak_alias(getservent_r,_getservent_r)
__weak_alias(setservent_r,_setservent_r)
#endif
void
setservent_r(int f, struct servent_data *sd)
{
if (sd->fp == NULL)
sd->fp = fopen(_PATH_SERVICES, "r");
else
rewind(sd->fp);
sd->stayopen |= f;
}
void
endservent_r(struct servent_data *sd)
{
if (sd->fp) {
(void)fclose(sd->fp);
sd->fp = NULL;
}
if (sd->aliases) {
free(sd->aliases);
sd->aliases = NULL;
sd->maxaliases = 0;
}
if (sd->line) {
free(sd->line);
sd->line = NULL;
}
sd->stayopen = 0;
}
struct servent *
getservent_r(struct servent *sp, struct servent_data *sd)
{
char *p, *cp, **q;
size_t i = 0;
int oerrno;
if (sd->fp == NULL && (sd->fp = fopen(_PATH_SERVICES, "r")) == NULL)
return NULL;
for (;;) {
if (sd->line)
free(sd->line);
sd->line = fparseln(sd->fp, NULL, NULL, NULL,
FPARSELN_UNESCALL);
if (sd->line == NULL)
return NULL;
sp->s_name = p = sd->line;
p = strpbrk(p, " \t");
if (p == NULL)
continue;
*p++ = '\0';
while (*p == ' ' || *p == '\t')
p++;
cp = strpbrk(p, ",/");
if (cp == NULL)
continue;
*cp++ = '\0';
sp->s_port = htons((u_short)atoi(p));
sp->s_proto = cp;
if (sd->aliases == NULL) {
sd->maxaliases = 10;
sd->aliases = malloc(sd->maxaliases * sizeof(char *));
if (sd->aliases == NULL) {
oerrno = errno;
endservent_r(sd);
errno = oerrno;
return NULL;
}
}
q = sp->s_aliases = sd->aliases;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
while (cp && *cp) {
if (*cp == ' ' || *cp == '\t') {
cp++;
continue;
}
if (i == sd->maxaliases - 2) {
sd->maxaliases *= 2;
q = realloc(q,
sd->maxaliases * sizeof(char *));
if (q == NULL) {
oerrno = errno;
endservent_r(sd);
errno = oerrno;
return NULL;
}
sp->s_aliases = sd->aliases = q;
}
q[i++] = cp;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
}
q[i] = NULL;
return sp;
}
}