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authorUlrich Drepper <drepper@redhat.com>2006-10-06 17:49:27 +0000
committerUlrich Drepper <drepper@redhat.com>2006-10-06 17:49:27 +0000
commit68361572527e50a1e8d21f2898faa3809181c946 (patch)
tree446ea60d76dd8f8028b8339396ca2b8c3b78cbfb /nis/nss_nisplus
parentffb15bc0aa3de7767c9396f415e2b752ebc04923 (diff)
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* nis/nis_table.c (nis_list): Handle FOLLOW_PATH | ALL_RESULTS
when callback is NULL. * nis/Versions (libnss_nisplus): Add _nss_nisplus_initgroups_dyn@@GLIBC_PRIVATE. * nis/Makefile (libnss_nisplus-routines): Add nisplus-initgroups. * nis/nss_nisplus/nisplus-grp.c (tablename_val, tablename_len, _nss_create_tablename): Rename to... (grp_tablename_val, grp_tablename_len, _nss_grp_create_tablename): ... these. No longer static. (internal_setgrent): Adjust users. (_nss_nisplus_getgrnam_r, _nss_nisplus_getgrgid_r): Likewise. Don't use locking around _nss_grp_create_tablename call. * nis/nss_nisplus/nisplus-initgroups.c: New file.
Diffstat (limited to 'nis/nss_nisplus')
-rw-r--r--nis/nss_nisplus/nisplus-grp.c51
-rw-r--r--nis/nss_nisplus/nisplus-initgroups.c150
2 files changed, 174 insertions, 27 deletions
diff --git a/nis/nss_nisplus/nisplus-grp.c b/nis/nss_nisplus/nisplus-grp.c
index c1adc98aee..7cc762fea9 100644
--- a/nis/nss_nisplus/nisplus-grp.c
+++ b/nis/nss_nisplus/nisplus-grp.c
@@ -46,13 +46,13 @@ static char *tableptr;
static netobj cursor;
-static nis_name tablename_val;
-static size_t tablename_len;
+nis_name grp_tablename_val attribute_hidden;
+size_t grp_tablename_len attribute_hidden;
-static enum nss_status
-_nss_create_tablename (int *errnop)
+enum nss_status
+_nss_grp_create_tablename (int *errnop)
{
- if (tablename_val == NULL)
+ if (grp_tablename_val == NULL)
{
const char *local_dir = nis_local_directory ();
size_t local_dir_len = strlen (local_dir);
@@ -67,11 +67,16 @@ _nss_create_tablename (int *errnop)
memcpy (__stpcpy (p, prefix), local_dir, local_dir_len + 1);
- tablename_len = sizeof (prefix) - 1 + local_dir_len;
+ grp_tablename_len = sizeof (prefix) - 1 + local_dir_len;
atomic_write_barrier ();
- tablename_val = p;
+ 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;
@@ -103,19 +108,19 @@ internal_setgrent (int *errnop)
{
enum nss_status status = NSS_STATUS_SUCCESS;
- if (tablename_val == NULL)
- status = _nss_create_tablename (errnop);
+ if (grp_tablename_val == NULL)
+ status = _nss_grp_create_tablename (errnop);
if (status == NSS_STATUS_SUCCESS)
{
- ibreq = __create_ib_request (tablename_val, 0);
+ ibreq = __create_ib_request (grp_tablename_val, 0);
if (ibreq == NULL)
{
*errnop = errno;
return NSS_STATUS_TRYAGAIN;
}
- nis_error retcode = __prepare_niscall (tablename_val, &dir, &bptr, 0);
+ nis_error retcode = __prepare_niscall (grp_tablename_val, &dir, &bptr, 0);
if (retcode != NIS_SUCCESS)
{
nis_free_request (ibreq);
@@ -285,13 +290,9 @@ _nss_nisplus_getgrnam_r (const char *name, struct group *gr,
{
int parse_res;
- if (tablename_val == NULL)
+ if (grp_tablename_val == NULL)
{
- __libc_lock_lock (lock);
-
- enum nss_status status = _nss_create_tablename (errnop);
-
- __libc_lock_unlock (lock);
+ enum nss_status status = _nss_grp_create_tablename (errnop);
if (status != NSS_STATUS_SUCCESS)
return status;
@@ -304,10 +305,10 @@ _nss_nisplus_getgrnam_r (const char *name, struct group *gr,
}
nis_result *result;
- char buf[strlen (name) + 9 + tablename_len];
+ char buf[strlen (name) + 9 + grp_tablename_len];
int olderr = errno;
- snprintf (buf, sizeof (buf), "[name=%s],%s", name, tablename_val);
+ snprintf (buf, sizeof (buf), "[name=%s],%s", name, grp_tablename_val);
result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH, NULL, NULL);
@@ -348,13 +349,9 @@ 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)
+ if (grp_tablename_val == NULL)
{
- __libc_lock_lock (lock);
-
- enum nss_status status = _nss_create_tablename (errnop);
-
- __libc_lock_unlock (lock);
+ enum nss_status status = _nss_grp_create_tablename (errnop);
if (status != NSS_STATUS_SUCCESS)
return status;
@@ -362,11 +359,11 @@ _nss_nisplus_getgrgid_r (const gid_t gid, struct group *gr,
int parse_res;
nis_result *result;
- char buf[8 + 3 * sizeof (unsigned long int) + tablename_len];
+ 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, tablename_val);
+ (unsigned long int) gid, grp_tablename_val);
result = nis_list (buf, FOLLOW_PATH | FOLLOW_LINKS, NULL, NULL);
diff --git a/nis/nss_nisplus/nisplus-initgroups.c b/nis/nss_nisplus/nisplus-initgroups.c
new file mode 100644
index 0000000000..6588ec2533
--- /dev/null
+++ b/nis/nss_nisplus/nisplus-initgroups.c
@@ -0,0 +1,150 @@
+/* Copyright (C) 1997, 2001, 2002, 2003, 2005, 2006
+ Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ 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"
+#include <libnsl.h>
+#include <nis_intern.h>
+#include <nis_xdr.h>
+
+#define NISOBJVAL(col, obj) \
+ ((obj)->EN_data.en_cols.en_cols_val[col].ec_value.ec_value_val)
+
+#define NISOBJLEN(col, obj) \
+ ((obj)->EN_data.en_cols.en_cols_val[col].ec_value.ec_value_len)
+
+extern nis_name grp_tablename_val attribute_hidden;
+extern size_t grp_tablename_len attribute_hidden;
+extern enum nss_status _nss_grp_create_tablename (int *errnop);
+
+
+enum nss_status
+_nss_nisplus_initgroups_dyn (const char *user, gid_t group, long int *start,
+ long int *size, gid_t **groupsp, long int limit,
+ int *errnop)
+{
+ if (grp_tablename_val == NULL)
+ {
+ enum nss_status status = _nss_grp_create_tablename (errnop);
+
+ if (status != NSS_STATUS_SUCCESS)
+ return status;
+ }
+
+ nis_result *result;
+ char buf[strlen (user) + 12 + grp_tablename_len];
+
+ snprintf (buf, sizeof (buf), "[members=%s],%s", user, grp_tablename_val);
+
+ result = nis_list (buf, FOLLOW_LINKS | FOLLOW_PATH | ALL_RESULTS, 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;
+ }
+
+ if (NIS_RES_NUMOBJ (result) == 0)
+ {
+ errout:
+ nis_freeresult (result);
+ return NSS_STATUS_NOTFOUND;
+ }
+
+ gid_t *groups = *groupsp;
+ nis_object *obj = NIS_RES_OBJECT (result);
+ for (unsigned int cnt = 0; cnt < NIS_RES_NUMOBJ (result); ++cnt, ++obj)
+ {
+ if (__type_of (obj) != NIS_ENTRY_OBJ
+ || strcmp (obj->EN_data.en_type, "group_tbl") != 0
+ || obj->EN_data.en_cols.en_cols_len < 4)
+ continue;
+
+ char *numstr = NISOBJVAL (2, obj);
+ size_t len = NISOBJLEN (2, obj);
+ if (len == 0 || numstr[0] == '\0')
+ continue;
+
+ gid_t gid;
+ char *endp;
+ if (__builtin_expect (numstr[len - 1] != '\0', 0))
+ {
+ char numstrbuf[len + 1];
+ memcpy (numstrbuf, numstr, len);
+ numstrbuf[len] = '\0';
+ gid = strtoul (numstrbuf, &endp, 10);
+ if (*endp)
+ continue;
+ }
+ else
+ {
+ gid = strtoul (numstr, &endp, 10);
+ if (*endp)
+ continue;
+ }
+
+ if (gid == group)
+ continue;
+
+ /* Insert this group. */
+ if (*start == *size)
+ {
+ /* Need a bigger buffer. */
+ long int newsize;
+
+ if (limit > 0 && *size == limit)
+ /* We reached the maximum. */
+ break;
+
+ if (limit <= 0)
+ newsize = 2 * *size;
+ else
+ newsize = MIN (limit, 2 * *size);
+
+ gid_t *newgroups = realloc (groups, newsize * sizeof (*groups));
+ if (newgroups == NULL)
+ goto errout;
+ *groupsp = groups = newgroups;
+ *size = newsize;
+ }
+
+ groups[*start] = gid;
+ *start += 1;
+ }
+
+ nis_freeresult (result);
+ return NSS_STATUS_SUCCESS;
+}