305 lines
6.7 KiB
C
305 lines
6.7 KiB
C
/* Copyright (C) 1997, 1999, 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 <errno.h>
|
|
#include <pwd.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;
|
|
nis_name pwd_tablename_val attribute_hidden;
|
|
size_t pwd_tablename_len attribute_hidden;
|
|
|
|
enum nss_status
|
|
_nss_pwd_create_tablename (int *errnop)
|
|
{
|
|
if (pwd_tablename_val == NULL)
|
|
{
|
|
const char *local_dir = nis_local_directory ();
|
|
size_t local_dir_len = strlen (local_dir);
|
|
static const char prefix[] = "passwd.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);
|
|
|
|
pwd_tablename_len = sizeof (prefix) - 1 + local_dir_len;
|
|
|
|
atomic_write_barrier ();
|
|
|
|
if (atomic_compare_and_exchange_bool_acq (&pwd_tablename_val, p, NULL))
|
|
{
|
|
/* Another thread already installed the value. */
|
|
free (p);
|
|
pwd_tablename_len = strlen (pwd_tablename_val);
|
|
}
|
|
}
|
|
|
|
return NSS_STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
enum nss_status
|
|
_nss_nisplus_setpwent (int stayopen)
|
|
{
|
|
enum nss_status status = NSS_STATUS_SUCCESS;
|
|
|
|
__libc_lock_lock (lock);
|
|
|
|
if (result != NULL)
|
|
{
|
|
nis_freeresult (result);
|
|
result = NULL;
|
|
}
|
|
|
|
if (pwd_tablename_val == NULL)
|
|
{
|
|
int err;
|
|
status = _nss_pwd_create_tablename (&err);
|
|
}
|
|
|
|
__libc_lock_unlock (lock);
|
|
|
|
return status;
|
|
}
|
|
|
|
enum nss_status
|
|
_nss_nisplus_endpwent (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_getpwent_r (struct passwd *pw, char *buffer, size_t buflen,
|
|
int *errnop)
|
|
{
|
|
int parse_res;
|
|
|
|
/* Get the next entry until we found a correct one. */
|
|
do
|
|
{
|
|
nis_result *saved_res;
|
|
|
|
if (result == NULL)
|
|
{
|
|
saved_res = NULL;
|
|
if (pwd_tablename_val == NULL)
|
|
{
|
|
enum nss_status status = _nss_pwd_create_tablename (errnop);
|
|
|
|
if (status != NSS_STATUS_SUCCESS)
|
|
return status;
|
|
}
|
|
|
|
result = nis_first_entry (pwd_tablename_val);
|
|
if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
|
|
return niserr2nss (result->status);
|
|
}
|
|
else
|
|
{
|
|
saved_res = result;
|
|
result = nis_next_entry (pwd_tablename_val, &result->cookie);
|
|
if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
|
|
{
|
|
nis_freeresult (saved_res);
|
|
return niserr2nss (result->status);
|
|
}
|
|
}
|
|
|
|
parse_res = _nss_nisplus_parse_pwent (result, pw, buffer,
|
|
buflen, errnop);
|
|
if (__builtin_expect (parse_res == -1, 0))
|
|
{
|
|
nis_freeresult (result);
|
|
result = saved_res;
|
|
*errnop = ERANGE;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
|
|
if (saved_res)
|
|
nis_freeresult (saved_res);
|
|
}
|
|
while (!parse_res);
|
|
|
|
return NSS_STATUS_SUCCESS;
|
|
}
|
|
|
|
enum nss_status
|
|
_nss_nisplus_getpwent_r (struct passwd *result, char *buffer, size_t buflen,
|
|
int *errnop)
|
|
{
|
|
int status;
|
|
|
|
__libc_lock_lock (lock);
|
|
|
|
status = internal_nisplus_getpwent_r (result, buffer, buflen, errnop);
|
|
|
|
__libc_lock_unlock (lock);
|
|
|
|
return status;
|
|
}
|
|
|
|
enum nss_status
|
|
_nss_nisplus_getpwnam_r (const char *name, struct passwd *pw,
|
|
char *buffer, size_t buflen, int *errnop)
|
|
{
|
|
int parse_res;
|
|
|
|
if (pwd_tablename_val == NULL)
|
|
{
|
|
enum nss_status status = _nss_pwd_create_tablename (errnop);
|
|
|
|
if (status != NSS_STATUS_SUCCESS)
|
|
return status;
|
|
}
|
|
|
|
if (name == NULL)
|
|
{
|
|
*errnop = EINVAL;
|
|
return NSS_STATUS_UNAVAIL;
|
|
}
|
|
|
|
nis_result *result;
|
|
char buf[strlen (name) + 9 + pwd_tablename_len];
|
|
int olderr = errno;
|
|
|
|
snprintf (buf, sizeof (buf), "[name=%s],%s", name, pwd_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_pwent (result, pw, 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_getpwuid_r (const uid_t uid, struct passwd *pw,
|
|
char *buffer, size_t buflen, int *errnop)
|
|
{
|
|
if (pwd_tablename_val == NULL)
|
|
{
|
|
enum nss_status status = _nss_pwd_create_tablename (errnop);
|
|
|
|
if (status != NSS_STATUS_SUCCESS)
|
|
return status;
|
|
}
|
|
|
|
int parse_res;
|
|
nis_result *result;
|
|
char buf[8 + 3 * sizeof (unsigned long int) + pwd_tablename_len];
|
|
int olderr = errno;
|
|
|
|
snprintf (buf, sizeof (buf), "[uid=%lu],%s",
|
|
(unsigned long int) uid, pwd_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_pwent (result, pw, 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;
|
|
}
|