mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-03 04:01:43 +08:00
402 lines
9.0 KiB
C
402 lines
9.0 KiB
C
/* Copyright (C) 1997-2016 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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <atomic.h>
|
|
#include <nss.h>
|
|
#include <grp.h>
|
|
#include <ctype.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <libc-lock.h>
|
|
#include <rpcsvc/nis.h>
|
|
|
|
#include "nss-nisplus.h"
|
|
#include "nisplus-parser.h"
|
|
#include <libnsl.h>
|
|
#include <nis_intern.h>
|
|
#include <nis_xdr.h>
|
|
|
|
|
|
__libc_lock_define_initialized (static, lock);
|
|
|
|
/* Connection information. */
|
|
static ib_request *ibreq;
|
|
static directory_obj *dir;
|
|
static dir_binding bptr;
|
|
static char *tablepath;
|
|
static char *tableptr;
|
|
/* Cursor. */
|
|
static netobj cursor;
|
|
|
|
|
|
nis_name grp_tablename_val attribute_hidden;
|
|
size_t grp_tablename_len attribute_hidden;
|
|
|
|
enum nss_status
|
|
_nss_grp_create_tablename (int *errnop)
|
|
{
|
|
if (grp_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);
|
|
|
|
grp_tablename_len = sizeof (prefix) - 1 + local_dir_len;
|
|
|
|
atomic_write_barrier ();
|
|
|
|
if (atomic_compare_and_exchange_bool_acq (&grp_tablename_val, p, NULL))
|
|
{
|
|
/* Another thread already installed the value. */
|
|
free (p);
|
|
grp_tablename_len = strlen (grp_tablename_val);
|
|
}
|
|
}
|
|
|
|
return NSS_STATUS_SUCCESS;
|
|
}
|
|
|
|
|
|
static void
|
|
internal_endgrent (void)
|
|
{
|
|
__nisbind_destroy (&bptr);
|
|
memset (&bptr, '\0', sizeof (bptr));
|
|
|
|
nis_free_directory (dir);
|
|
dir = NULL;
|
|
|
|
nis_free_request (ibreq);
|
|
ibreq = NULL;
|
|
|
|
xdr_free ((xdrproc_t) xdr_netobj, (char *) &cursor);
|
|
memset (&cursor, '\0', sizeof (cursor));
|
|
|
|
free (tablepath);
|
|
tableptr = tablepath = NULL;
|
|
}
|
|
|
|
|
|
static enum nss_status
|
|
internal_setgrent (int *errnop)
|
|
{
|
|
enum nss_status status = NSS_STATUS_SUCCESS;
|
|
|
|
if (grp_tablename_val == NULL)
|
|
status = _nss_grp_create_tablename (errnop);
|
|
|
|
if (status == NSS_STATUS_SUCCESS)
|
|
{
|
|
ibreq = __create_ib_request (grp_tablename_val, 0);
|
|
if (ibreq == NULL)
|
|
{
|
|
*errnop = errno;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
|
|
nis_error retcode = __prepare_niscall (grp_tablename_val, &dir, &bptr, 0);
|
|
if (retcode != NIS_SUCCESS)
|
|
{
|
|
nis_free_request (ibreq);
|
|
ibreq = NULL;
|
|
status = niserr2nss (retcode);
|
|
}
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
|
|
enum nss_status
|
|
_nss_nisplus_setgrent (int stayopen)
|
|
{
|
|
enum nss_status status;
|
|
|
|
__libc_lock_lock (lock);
|
|
|
|
internal_endgrent ();
|
|
|
|
// XXX We need to be able to set errno. Pass in new parameter.
|
|
int err;
|
|
status = internal_setgrent (&err);
|
|
|
|
__libc_lock_unlock (lock);
|
|
|
|
return status;
|
|
}
|
|
|
|
|
|
enum nss_status
|
|
_nss_nisplus_endgrent (void)
|
|
{
|
|
__libc_lock_lock (lock);
|
|
|
|
internal_endgrent ();
|
|
|
|
__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 = -1;
|
|
enum nss_status retval = NSS_STATUS_SUCCESS;
|
|
|
|
/* Get the next entry until we found a correct one. */
|
|
do
|
|
{
|
|
nis_error status;
|
|
nis_result result;
|
|
memset (&result, '\0', sizeof (result));
|
|
|
|
if (cursor.n_bytes == NULL)
|
|
{
|
|
if (ibreq == NULL)
|
|
{
|
|
retval = internal_setgrent (errnop);
|
|
if (retval != NSS_STATUS_SUCCESS)
|
|
return retval;
|
|
}
|
|
|
|
status = __do_niscall3 (&bptr, NIS_IBFIRST,
|
|
(xdrproc_t) _xdr_ib_request,
|
|
(caddr_t) ibreq,
|
|
(xdrproc_t) _xdr_nis_result,
|
|
(caddr_t) &result,
|
|
0, NULL);
|
|
}
|
|
else
|
|
{
|
|
ibreq->ibr_cookie.n_bytes = cursor.n_bytes;
|
|
ibreq->ibr_cookie.n_len = cursor.n_len;
|
|
|
|
status = __do_niscall3 (&bptr, NIS_IBNEXT,
|
|
(xdrproc_t) _xdr_ib_request,
|
|
(caddr_t) ibreq,
|
|
(xdrproc_t) _xdr_nis_result,
|
|
(caddr_t) &result,
|
|
0, NULL);
|
|
|
|
ibreq->ibr_cookie.n_bytes = NULL;
|
|
ibreq->ibr_cookie.n_len = 0;
|
|
}
|
|
|
|
if (status != NIS_SUCCESS)
|
|
return niserr2nss (status);
|
|
|
|
if (NIS_RES_STATUS (&result) == NIS_NOTFOUND)
|
|
{
|
|
/* No more entries on this server. This means we have to go
|
|
to the next server on the path. */
|
|
status = __follow_path (&tablepath, &tableptr, ibreq, &bptr);
|
|
if (status != NIS_SUCCESS)
|
|
return niserr2nss (status);
|
|
|
|
directory_obj *newdir = NULL;
|
|
dir_binding newbptr;
|
|
status = __prepare_niscall (ibreq->ibr_name, &newdir, &newbptr, 0);
|
|
if (status != NIS_SUCCESS)
|
|
return niserr2nss (status);
|
|
|
|
nis_free_directory (dir);
|
|
dir = newdir;
|
|
__nisbind_destroy (&bptr);
|
|
bptr = newbptr;
|
|
|
|
xdr_free ((xdrproc_t) xdr_netobj, (char *) &result.cookie);
|
|
result.cookie.n_bytes = NULL;
|
|
result.cookie.n_len = 0;
|
|
parse_res = 0;
|
|
goto next;
|
|
}
|
|
else if (NIS_RES_STATUS (&result) != NIS_SUCCESS)
|
|
return niserr2nss (NIS_RES_STATUS (&result));
|
|
|
|
parse_res = _nss_nisplus_parse_grent (&result, gr,
|
|
buffer, buflen, errnop);
|
|
if (__glibc_unlikely (parse_res == -1))
|
|
{
|
|
*errnop = ERANGE;
|
|
retval = NSS_STATUS_TRYAGAIN;
|
|
goto freeres;
|
|
}
|
|
|
|
next:
|
|
/* Free the old cursor. */
|
|
xdr_free ((xdrproc_t) xdr_netobj, (char *) &cursor);
|
|
/* Remember the new one. */
|
|
cursor.n_bytes = result.cookie.n_bytes;
|
|
cursor.n_len = result.cookie.n_len;
|
|
/* Free the result structure. NB: we do not remove the cookie. */
|
|
result.cookie.n_bytes = NULL;
|
|
result.cookie.n_len = 0;
|
|
freeres:
|
|
xdr_free ((xdrproc_t) _xdr_nis_result, (char *) &result);
|
|
memset (&result, '\0', sizeof (result));
|
|
}
|
|
while (!parse_res);
|
|
|
|
return retval;
|
|
}
|
|
|
|
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 (grp_tablename_val == NULL)
|
|
{
|
|
enum nss_status status = _nss_grp_create_tablename (errnop);
|
|
|
|
if (status != NSS_STATUS_SUCCESS)
|
|
return status;
|
|
}
|
|
|
|
if (name == NULL)
|
|
{
|
|
*errnop = EINVAL;
|
|
return NSS_STATUS_NOTFOUND;
|
|
}
|
|
|
|
nis_result *result;
|
|
char buf[strlen (name) + 9 + grp_tablename_len];
|
|
int olderr = errno;
|
|
|
|
snprintf (buf, sizeof (buf), "[name=%s],%s", name, grp_tablename_val);
|
|
|
|
result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL);
|
|
|
|
if (result == NULL)
|
|
{
|
|
*errnop = ENOMEM;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
|
|
if (__glibc_unlikely (niserr2nss (result->status) != NSS_STATUS_SUCCESS))
|
|
{
|
|
enum nss_status status = niserr2nss (result->status);
|
|
|
|
nis_freeresult (result);
|
|
return status;
|
|
}
|
|
|
|
parse_res = _nss_nisplus_parse_grent (result, gr, buffer, buflen, errnop);
|
|
nis_freeresult (result);
|
|
if (__glibc_unlikely (parse_res < 1))
|
|
{
|
|
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 (grp_tablename_val == NULL)
|
|
{
|
|
enum nss_status status = _nss_grp_create_tablename (errnop);
|
|
|
|
if (status != NSS_STATUS_SUCCESS)
|
|
return status;
|
|
}
|
|
|
|
int parse_res;
|
|
nis_result *result;
|
|
char buf[8 + 3 * sizeof (unsigned long int) + grp_tablename_len];
|
|
int olderr = errno;
|
|
|
|
snprintf (buf, sizeof (buf), "[gid=%lu],%s",
|
|
(unsigned long int) gid, grp_tablename_val);
|
|
|
|
result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
|
|
|
|
if (result == NULL)
|
|
{
|
|
*errnop = ENOMEM;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
|
|
if (__glibc_unlikely (niserr2nss (result->status) != NSS_STATUS_SUCCESS))
|
|
{
|
|
enum nss_status status = niserr2nss (result->status);
|
|
|
|
__set_errno (olderr);
|
|
|
|
nis_freeresult (result);
|
|
return status;
|
|
}
|
|
|
|
parse_res = _nss_nisplus_parse_grent (result, gr, buffer, buflen, errnop);
|
|
|
|
nis_freeresult (result);
|
|
if (__glibc_unlikely (parse_res < 1))
|
|
{
|
|
__set_errno (olderr);
|
|
|
|
if (parse_res == -1)
|
|
{
|
|
*errnop = ERANGE;
|
|
return NSS_STATUS_TRYAGAIN;
|
|
}
|
|
else
|
|
return NSS_STATUS_NOTFOUND;
|
|
}
|
|
|
|
return NSS_STATUS_SUCCESS;
|
|
}
|