minix/lib/nbsd_libc/net/getservent_r.c
Gianluca Guida b6cbf7203b Import unmodified NetBSD libc in trunk
This patch imports the unmodified current version of NetBSD libc.
The NetBSD includes are in /nbsd_include, while the libc code itself is 
split between lib/nbsd_libc and common/lib/libc.
2011-02-14 19:36:03 +00:00

323 lines
7.1 KiB
C

/* $NetBSD: getservent_r.c,v 1.10 2010/04/25 00:54:46 joerg 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 1.10 2010/04/25 00:54:46 joerg Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <cdbr.h>
#include <errno.h>
#include <fcntl.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "servent.h"
#ifdef __weak_alias
__weak_alias(endservent_r,_endservent_r)
__weak_alias(getservent_r,_getservent_r)
__weak_alias(setservent_r,_setservent_r)
#endif
int
_servent_open(struct servent_data *sd)
{
if (sd->flags & (_SV_CDB | _SV_PLAINFILE)) {
sd->flags |= _SV_FIRST;
return 0;
}
free(sd->line);
sd->line = NULL;
free(sd->cdb_buf);
sd->cdb_buf = NULL;
sd->cdb_buf_len = 0;
free(sd->aliases);
sd->aliases = NULL;
sd->maxaliases = 0;
sd->flags |= _SV_FIRST;
sd->cdb = cdbr_open(_PATH_SERVICES_CDB, CDBR_DEFAULT);
if (sd->cdb != NULL) {
sd->flags |= _SV_CDB;
return 0;
}
sd->plainfile = fopen(_PATH_SERVICES, "r");
if (sd->plainfile != NULL) {
sd->flags |= _SV_PLAINFILE;
return 0;
}
return -1;
}
void
_servent_close(struct servent_data *sd)
{
if (sd->flags & _SV_CDB) {
cdbr_close(sd->cdb);
sd->cdb = NULL;
sd->flags &= ~_SV_CDB;
}
if (sd->flags & _SV_PLAINFILE) {
(void)fclose(sd->plainfile);
sd->plainfile = NULL;
sd->flags &= ~_SV_PLAINFILE;
}
sd->flags &= ~_SV_STAYOPEN;
}
int
_servent_getline(struct servent_data *sd)
{
if (sd->flags & _SV_CDB)
return -1;
if ((sd->flags & _SV_PLAINFILE) == 0)
return -1;
free(sd->line);
sd->line = NULL;
if (sd->flags & _SV_FIRST) {
(void)rewind((FILE *)sd->plainfile);
sd->flags &= ~_SV_FIRST;
}
sd->line = fparseln(sd->plainfile, NULL, NULL, NULL,
FPARSELN_UNESCALL);
return sd->line == NULL ? -1 : 0;
}
struct servent *
_servent_parseline(struct servent_data *sd, struct servent *sp)
{
size_t i = 0;
int oerrno;
char *p, *cp, **q;
if (sd->line == NULL)
return NULL;
sp->s_name = p = sd->line;
p = strpbrk(p, " \t");
if (p == NULL)
return NULL;
*p++ = '\0';
while (*p == ' ' || *p == '\t')
p++;
cp = strpbrk(p, ",/");
if (cp == NULL)
return NULL;
*cp++ = '\0';
sp->s_port = htons((u_short)atoi(p));
sp->s_proto = cp;
if (sd->aliases == NULL) {
sd->maxaliases = 10;
sd->aliases = calloc(sd->maxaliases, sizeof(*sd->aliases));
if (sd->aliases == NULL) {
oerrno = errno;
endservent_r(sd);
errno = oerrno;
return NULL;
}
}
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(sd->aliases, sd->maxaliases * sizeof(*q));
if (q == NULL) {
oerrno = errno;
endservent_r(sd);
errno = oerrno;
return NULL;
}
sp->s_aliases = sd->aliases = q;
}
sp->s_aliases[i++] = cp;
cp = strpbrk(cp, " \t");
if (cp != NULL)
*cp++ = '\0';
}
sp->s_aliases[i] = NULL;
return sp;
}
void
setservent_r(int f, struct servent_data *sd)
{
(void)_servent_open(sd);
sd->flags |= f ? _SV_STAYOPEN : 0;
}
void
endservent_r(struct servent_data *sd)
{
_servent_close(sd);
free(sd->aliases);
sd->aliases = NULL;
sd->maxaliases = 0;
free(sd->line);
sd->line = NULL;
free(sd->cdb_buf);
sd->cdb_buf = NULL;
sd->cdb_buf_len = 0;
}
struct servent *
getservent_r(struct servent *sp, struct servent_data *sd)
{
if ((sd->flags & (_SV_CDB | _SV_PLAINFILE)) == 0 &&
_servent_open(sd) == -1)
return NULL;
if (sd->flags & _SV_CDB) {
const void *data;
size_t len;
if (sd->flags & _SV_FIRST) {
sd->cdb_index = 0;
sd->flags &= ~_SV_FIRST;
}
if (cdbr_get(sd->cdb, sd->cdb_index, &data, &len))
return NULL;
++sd->cdb_index;
return _servent_parsedb(sd, sp, data, len);
}
if (sd->flags & _SV_PLAINFILE) {
for (;;) {
if (_servent_getline(sd) == -1)
return NULL;
if (_servent_parseline(sd, sp) == NULL)
continue;
return sp;
}
}
return NULL;
}
struct servent *
_servent_parsedb(struct servent_data *sd, struct servent *sp,
const uint8_t *data, size_t len)
{
char **q;
size_t i;
int oerrno;
if ((sd->flags & _SV_STAYOPEN) == 0) {
if (len > sd->cdb_buf_len) {
void *tmp = realloc(sd->cdb_buf, len);
if (tmp == NULL)
goto fail;
sd->cdb_buf = tmp;
sd->cdb_buf_len = len;
}
memcpy(sd->cdb_buf, data, len);
data = sd->cdb_buf;
}
if (len < 2)
goto fail;
sp->s_port = htobe16(be16dec(data));
data += 2;
len -= 2;
if (len == 0 || len < (size_t)data[0] + 2)
goto fail;
sp->s_proto = __UNCONST(data + 1);
if (sp->s_proto[data[0]] != '\0')
goto fail;
len -= 2 + data[0];
data += 2 + data[0];
if (len == 0)
goto fail;
if (len < (size_t)data[0] + 2)
goto fail;
sp->s_name = __UNCONST(data + 1);
len -= 2 + data[0];
data += 2 + data[0];
if (sd->aliases == NULL) {
sd->maxaliases = 10;
sd->aliases = malloc(sd->maxaliases * sizeof(char *));
if (sd->aliases == NULL)
goto fail;
}
sp->s_aliases = sd->aliases;
i = 0;
while (len) {
if (len < (size_t)data[0] + 2)
goto fail;
if (i == sd->maxaliases - 2) {
sd->maxaliases *= 2;
q = realloc(sd->aliases, sd->maxaliases * sizeof(*q));
if (q == NULL)
goto fail;
sp->s_aliases = sd->aliases = q;
}
sp->s_aliases[i++] = __UNCONST(data + 1);
len -= 2 + data[0];
data += 2 + data[0];
}
sp->s_aliases[i] = NULL;
return sp;
fail:
oerrno = errno;
endservent_r(sd);
errno = oerrno;
return NULL;
}