glibc/nis/nss_nisplus/nisplus-grp.c
Ulrich Drepper c8e82b4a29 * sysdeps/sparc/sparc32/bits/atomic.h
(__v9_compare_and_exchange_val_32_acq): Add "memory" clobber.
	* sysdeps/sparc/sparc32/sparcv9/bits/atomic.h
	(__arch_compare_and_exchange_val_32_acq, atomic_exchange_acq):
	Likewise.
	* sysdeps/sparc/sparc64/bits/atomic.h
	(__arch_compare_and_exchange_val_32_acq,
	__arch_compare_and_exchange_val_64_acq, atomic_exchange_acq): Likewise.

2006-03-24  Jakub Jelinek  <jakub@redhat.com>

	* nis/nss_nisplus/nisplus-proto.c (_nss_create_tablename): Check the
	return value of malloc rather than the static var again.
	* nis/nss_nisplus/nisplus-grp.c (_nss_create_tablename): Likewise.
	* nis/nss_nisplus/nisplus-network.c (_nss_create_tablename): Likewise.
	* nis/nss_nisplus/nisplus-ethers.c (_nss_create_tablename): Likewise.
	* nis/nss_nisplus/nisplus-rpc.c (_nss_create_tablename): Likewise.
	* nis/nss_nisplus/nisplus-service.c (_nss_create_tablename): Likewise.
	* nis/nss_nisplus/nisplus-hosts.c (_nss_create_tablename): Likewise.
	* nis/nss_nisplus/nisplus-alias.c (_nss_create_tablename): Likewise.
	* nis/nss_nisplus/nisplus-pwd.c (_nss_pwd_create_tablename): Likewise.
2006-03-25 21:03:32 +00:00

309 lines
6.5 KiB
C

/* Copyright (C) 1997, 2001, 2002, 2003, 2005, 2006
Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <atomic.h>
#include <nss.h>
#include <grp.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <bits/libc-lock.h>
#include <rpcsvc/nis.h>
#include "nss-nisplus.h"
#include "nisplus-parser.h"
__libc_lock_define_initialized (static, lock);
static nis_result *result;
static unsigned long next_entry;
static nis_name tablename_val;
static size_t tablename_len;
static enum nss_status
_nss_create_tablename (int *errnop)
{
if (tablename_val == NULL)
{
const char *local_dir = nis_local_directory ();
size_t local_dir_len = strlen (local_dir);
static const char prefix[] = "group.org_dir.";
char *p = malloc (sizeof (prefix) + local_dir_len);
if (p == NULL)
{
*errnop = errno;
return NSS_STATUS_TRYAGAIN;
}
memcpy (__stpcpy (p, prefix), local_dir, local_dir_len + 1);
tablename_len = sizeof (prefix) - 1 + local_dir_len;
atomic_write_barrier ();
tablename_val = p;
}
return NSS_STATUS_SUCCESS;
}
static enum nss_status
internal_setgrent (void)
{
enum nss_status status;
if (result != NULL)
{
nis_freeresult (result);
result = NULL;
}
next_entry = 0;
if (tablename_val == NULL)
{
int err;
if (_nss_create_tablename (&err) != NSS_STATUS_SUCCESS)
return NSS_STATUS_UNAVAIL;
}
result = nis_list (tablename_val, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL);
if (result == NULL)
{
status = NSS_STATUS_TRYAGAIN;
__set_errno (ENOMEM);
}
else
{
status = niserr2nss (result->status);
if (status != NSS_STATUS_SUCCESS)
{
nis_freeresult (result);
result = NULL;
}
}
return status;
}
enum nss_status
_nss_nisplus_setgrent (int stayopen)
{
enum nss_status status;
__libc_lock_lock (lock);
status = internal_setgrent ();
__libc_lock_unlock (lock);
return status;
}
enum nss_status
_nss_nisplus_endgrent (void)
{
__libc_lock_lock (lock);
if (result != NULL)
{
nis_freeresult (result);
result = NULL;
}
__libc_lock_unlock (lock);
return NSS_STATUS_SUCCESS;
}
static enum nss_status
internal_nisplus_getgrent_r (struct group *gr, char *buffer, size_t buflen,
int *errnop)
{
int parse_res;
if (result == NULL)
{
enum nss_status status;
status = internal_setgrent ();
if (result == NULL || status != NSS_STATUS_SUCCESS)
return status;
}
/* Get the next entry until we found a correct one. */
do
{
if (next_entry >= result->objects.objects_len)
return NSS_STATUS_NOTFOUND;
parse_res = _nss_nisplus_parse_grent (result, next_entry, gr,
buffer, buflen, errnop);
if (parse_res == -1)
return NSS_STATUS_TRYAGAIN;
++next_entry;
}
while (!parse_res);
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nisplus_getgrent_r (struct group *result, char *buffer, size_t buflen,
int *errnop)
{
int status;
__libc_lock_lock (lock);
status = internal_nisplus_getgrent_r (result, buffer, buflen, errnop);
__libc_lock_unlock (lock);
return status;
}
enum nss_status
_nss_nisplus_getgrnam_r (const char *name, struct group *gr,
char *buffer, size_t buflen, int *errnop)
{
int parse_res;
if (tablename_val == NULL)
{
__libc_lock_lock (lock);
enum nss_status status = _nss_create_tablename (errnop);
__libc_lock_unlock (lock);
if (status != NSS_STATUS_SUCCESS)
return status;
}
if (name == NULL)
{
*errnop = EINVAL;
return NSS_STATUS_NOTFOUND;
}
nis_result *result;
char buf[strlen (name) + 9 + tablename_len];
int olderr = errno;
snprintf (buf, sizeof (buf), "[name=%s],%s", name, tablename_val);
result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL);
if (result == NULL)
{
*errnop = ENOMEM;
return NSS_STATUS_TRYAGAIN;
}
if (__builtin_expect (niserr2nss (result->status) != NSS_STATUS_SUCCESS, 0))
{
enum nss_status status = niserr2nss (result->status);
nis_freeresult (result);
return status;
}
parse_res = _nss_nisplus_parse_grent (result, 0, gr, buffer, buflen, errnop);
nis_freeresult (result);
if (__builtin_expect (parse_res < 1, 0))
{
if (parse_res == -1)
{
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
else
{
__set_errno (olderr);
return NSS_STATUS_NOTFOUND;
}
}
return NSS_STATUS_SUCCESS;
}
enum nss_status
_nss_nisplus_getgrgid_r (const gid_t gid, struct group *gr,
char *buffer, size_t buflen, int *errnop)
{
if (tablename_val == NULL)
{
__libc_lock_lock (lock);
enum nss_status status = _nss_create_tablename (errnop);
__libc_lock_unlock (lock);
if (status != NSS_STATUS_SUCCESS)
return status;
}
int parse_res;
nis_result *result;
char buf[8 + 3 * sizeof (unsigned long int) + tablename_len];
int olderr = errno;
snprintf (buf, sizeof (buf), "[gid=%lu],%s",
(unsigned long int) gid, tablename_val);
result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
if (result == NULL)
{
*errnop = ENOMEM;
return NSS_STATUS_TRYAGAIN;
}
if (__builtin_expect (niserr2nss (result->status) != NSS_STATUS_SUCCESS, 0))
{
enum nss_status status = niserr2nss (result->status);
__set_errno (olderr);
nis_freeresult (result);
return status;
}
parse_res = _nss_nisplus_parse_grent (result, 0, gr, buffer, buflen, errnop);
nis_freeresult (result);
if (__builtin_expect (parse_res < 1, 0))
{
__set_errno (olderr);
if (parse_res == -1)
{
*errnop = ERANGE;
return NSS_STATUS_TRYAGAIN;
}
else
return NSS_STATUS_NOTFOUND;
}
return NSS_STATUS_SUCCESS;
}