-/* Copyright (C) 1997 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2014 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 Library General Public License as
- published by the Free Software Foundation; either version 2 of the
- License, or (at your option) any later version.
+ 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
- Library General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with the GNU C Library; see the file COPYING.LIB. If not,
- write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ 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 <string.h>
#include <bits/libc-lock.h>
#include <rpcsvc/nis.h>
-#include <rpcsvc/nislib.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);
-static nis_result *result = NULL;
-static unsigned long next_entry = 0;
-static nis_name tablename_val = NULL;
-static u_long tablename_len = 0;
+/* Connection information. */
+static ib_request *ibreq;
+static directory_obj *dir;
+static dir_binding bptr;
+static char *tablepath;
+static char *tableptr;
+/* Cursor. */
+static netobj cursor;
-static enum nss_status
-_nss_create_tablename (void)
+
+nis_name grp_tablename_val attribute_hidden;
+size_t grp_tablename_len attribute_hidden;
+
+enum nss_status
+_nss_grp_create_tablename (int *errnop)
{
- if (tablename_val == NULL)
+ if (grp_tablename_val == NULL)
{
- char buf [40 + strlen (nis_local_directory ())];
- char *p;
-
- p = stpcpy (buf, "group.org_dir.");
- p = stpcpy (p, nis_local_directory ());
- tablename_val = strdup (buf);
- if (tablename_val == NULL)
- return NSS_STATUS_TRYAGAIN;
- tablename_len = strlen (tablename_val);
+ 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 (void)
+internal_setgrent (int *errnop)
{
- if (result)
- nis_freeresult (result);
- result = NULL;
- next_entry = 0;
+ enum nss_status status = NSS_STATUS_SUCCESS;
- if (tablename_val == NULL)
- if (_nss_create_tablename () != NSS_STATUS_SUCCESS)
- return NSS_STATUS_UNAVAIL;
+ if (grp_tablename_val == NULL)
+ status = _nss_grp_create_tablename (errnop);
- result = nis_list (tablename_val, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL);
- if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
+ if (status == NSS_STATUS_SUCCESS)
{
- nis_freeresult (result);
- result = NULL;
+ 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 niserr2nss (result->status);
+
+ return status;
}
+
enum nss_status
-_nss_nisplus_setgrent (void)
+_nss_nisplus_setgrent (int stayopen)
{
enum nss_status status;
__libc_lock_lock (lock);
- status = internal_setgrent ();
+ 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);
- if (result)
- nis_freeresult (result);
- result = NULL;
+ 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)
+internal_nisplus_getgrent_r (struct group *gr, char *buffer, size_t buflen,
+ int *errnop)
{
- int parse_res;
-
- if (result == NULL)
- internal_setgrent ();
+ int parse_res = -1;
+ enum nss_status retval = NSS_STATUS_SUCCESS;
/* Get the next entry until we found a correct one. */
do
{
- if (next_entry >= result->objects.objects_len)
- return NSS_STATUS_NOTFOUND;
+ 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));
- if ((parse_res = _nss_nisplus_parse_grent (result, next_entry, gr,
- buffer, buflen)) == -1)
- return NSS_STATUS_TRYAGAIN;
+ 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_entry;
+ 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 NSS_STATUS_SUCCESS;
+ return retval;
}
enum nss_status
-_nss_nisplus_getgrent_r (struct group *result, char *buffer, size_t buflen)
+_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);
+ status = internal_nisplus_getgrent_r (result, buffer, buflen, errnop);
__libc_lock_unlock (lock);
enum nss_status
_nss_nisplus_getgrnam_r (const char *name, struct group *gr,
- char *buffer, size_t buflen)
+ char *buffer, size_t buflen, int *errnop)
{
int parse_res;
- if (tablename_val == NULL)
- if (_nss_create_tablename() != NSS_STATUS_SUCCESS)
- return NSS_STATUS_UNAVAIL;
+ if (grp_tablename_val == NULL)
+ {
+ enum nss_status status = _nss_grp_create_tablename (errnop);
+
+ if (status != NSS_STATUS_SUCCESS)
+ return status;
+ }
- if (name == NULL || strlen (name) > 8)
- return NSS_STATUS_NOTFOUND;
- else
+ if (name == NULL)
{
- nis_result *result;
- char buf[strlen (name) + 24 + tablename_len];
+ *errnop = EINVAL;
+ return NSS_STATUS_NOTFOUND;
+ }
- sprintf (buf, "[name=%s],%s", name, tablename_val);
+ nis_result *result;
+ char buf[strlen (name) + 9 + grp_tablename_len];
+ int olderr = errno;
- result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL);
+ snprintf (buf, sizeof (buf), "[name=%s],%s", name, grp_tablename_val);
- if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
- {
- enum nss_status status = niserr2nss (result->status);
+ result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL);
- nis_freeresult (result);
- return status;
- }
+ 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);
- parse_res = _nss_nisplus_parse_grent (result, 0, gr, buffer, buflen);
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)
- return NSS_STATUS_TRYAGAIN;
- if (parse_res)
- return NSS_STATUS_SUCCESS;
-
- return NSS_STATUS_NOTFOUND;
+ {
+ *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)
+ char *buffer, size_t buflen, int *errnop)
{
- if (tablename_val == NULL)
- if (_nss_create_tablename() != NSS_STATUS_SUCCESS)
- return NSS_STATUS_UNAVAIL;
+ 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[36 + tablename_len];
+ int parse_res;
+ nis_result *result;
+ char buf[8 + 3 * sizeof (unsigned long int) + grp_tablename_len];
+ int olderr = errno;
- sprintf (buf, "[gid=%d],%s", gid, tablename_val);
+ snprintf (buf, sizeof (buf), "[gid=%lu],%s",
+ (unsigned long int) gid, grp_tablename_val);
- result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
+ result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
- if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
- {
- enum nss_status status = niserr2nss (result->status);
+ if (result == NULL)
+ {
+ *errnop = ENOMEM;
+ return NSS_STATUS_TRYAGAIN;
+ }
- nis_freeresult (result);
- return status;
- }
+ if (__glibc_unlikely (niserr2nss (result->status) != NSS_STATUS_SUCCESS))
+ {
+ enum nss_status status = niserr2nss (result->status);
+
+ __set_errno (olderr);
- parse_res = _nss_nisplus_parse_grent (result, 0, gr, buffer, buflen);
+ nis_freeresult (result);
+ return status;
+ }
- nis_freeresult (result);
+ parse_res = _nss_nisplus_parse_grent (result, gr, buffer, buflen, errnop);
- if (parse_res == -1)
- return NSS_STATUS_TRYAGAIN;
+ nis_freeresult (result);
+ if (__glibc_unlikely (parse_res < 1))
+ {
+ __set_errno (olderr);
- if (parse_res)
- return NSS_STATUS_SUCCESS;
+ if (parse_res == -1)
+ {
+ *errnop = ERANGE;
+ return NSS_STATUS_TRYAGAIN;
+ }
+ else
+ return NSS_STATUS_NOTFOUND;
+ }
- return NSS_STATUS_NOTFOUND;
- }
+ return NSS_STATUS_SUCCESS;
}
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