Update copyright notices with scripts/update-copyrights

[thirdparty/glibc.git] / nis / nss_nis / nis-netgrp.c

diff --git a/nis/nss_nis/nis-netgrp.c b/nis/nss_nis/nis-netgrp.c
index e9318d6e95e166668ff2aa9f826e34fdd82f130d..d4b2e569d3e46336aec0cc7984dd64acb81eb8de 100644 (file)
--- a/nis/nss_nis/nis-netgrp.c
+++ b/nis/nss_nis/nis-netgrp.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996,1997,1999,2000,2002,2003 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2014 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Thorsten Kukuk <kukuk@suse.de>, 1996.
 
@@ -13,15 +13,15 @@
    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.  */
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
 
-#include <nss.h>
+#include <assert.h>
 #include <ctype.h>
 #include <errno.h>
-#include <bits/libc-lock.h>
+#include <malloc.h>
 #include <netdb.h>
+#include <nss.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -31,99 +31,69 @@
 
 #include "nss-nis.h"
 
-/* Locks the static variables in this file.  */
-__libc_lock_define_initialized (static, lock)
-
-static char *data;
-static size_t data_size;
-static char *cursor;
-
 extern enum nss_status
-_nss_netgroup_parseline (char **cursor, struct __netgrent *result,
+_nss_netgroup_parseline (char **cursor, struct __netgrent *netgrp,
                         char *buffer, size_t buflen, int *errnop);
 
 
 static void
-internal_nis_endnetgrent (void)
+internal_nis_endnetgrent (struct __netgrent *netgrp)
 {
-  if (data != NULL)
-    {
-      free (data);
-      data = NULL;
-      data_size = 0;
-      cursor = NULL;
-    }
+  free (netgrp->data);
+  netgrp->data = NULL;
+  netgrp->data_size = 0;
+  netgrp->cursor = NULL;
 }
 
+
 enum nss_status
-_nss_nis_setnetgrent (const char *group, struct __netgrent *dummy)
+_nss_nis_setnetgrent (const char *group, struct __netgrent *netgrp)
 {
-  char *domain;
-  char *result;
-  int len, group_len;
+  int len;
   enum nss_status status;
 
   status = NSS_STATUS_SUCCESS;
 
-  if (group == NULL || group[0] == '\0')
+  if (__builtin_expect (group == NULL || group[0] == '\0', 0))
     return NSS_STATUS_UNAVAIL;
 
-  if (yp_get_default_domain (&domain))
+  char *domain;
+  if (__builtin_expect (yp_get_default_domain (&domain), 0))
     return NSS_STATUS_UNAVAIL;
 
-  __libc_lock_lock (lock);
-
-  internal_nis_endnetgrent ();
-
-  group_len = strlen (group);
-
-  status = yperr2nss (yp_match (domain, "netgroup", group, group_len,
-                               &result, &len));
-  if (status == NSS_STATUS_SUCCESS)
+  status = yperr2nss (yp_match (domain, "netgroup", group, strlen (group),
+                               &netgrp->data, &len));
+  if (__builtin_expect (status == NSS_STATUS_SUCCESS, 1))
     {
-      if (len > 0 && (data = malloc (len + 1)) != NULL)
-       {
-         data_size = len;
-         cursor = strncpy (data, result, len + 1);
-         data[len] = '\0';
-         free (result);
-       }
-      else
-       status = NSS_STATUS_NOTFOUND;
+      /* Our implementation of yp_match already allocates a buffer
+        which is one byte larger than the value in LEN specifies
+        and the last byte is filled with NUL.  So we can simply
+        use that buffer.  */
+      assert (len >= 0);
+      assert (malloc_usable_size (netgrp->data) >= len + 1);
+      assert (netgrp->data[len] == '\0');
+
+      netgrp->data_size = len;
+      netgrp->cursor = netgrp->data;
     }
 
-  __libc_lock_unlock (lock);
-
   return status;
 }
 
 
 enum nss_status
-_nss_nis_endnetgrent (struct __netgrent *dummy)
+_nss_nis_endnetgrent (struct __netgrent *netgrp)
 {
-  __libc_lock_lock (lock);
-
-  internal_nis_endnetgrent ();
-
-  __libc_lock_unlock (lock);
+  internal_nis_endnetgrent (netgrp);
 
   return NSS_STATUS_SUCCESS;
 }
 
+
 enum nss_status
 _nss_nis_getnetgrent_r (struct __netgrent *result, char *buffer, size_t buflen,
                        int *errnop)
 {
-  enum nss_status status;
-
-  if (cursor == NULL)
-    return NSS_STATUS_NOTFOUND;
-
-  __libc_lock_lock (lock);
-
-  status = _nss_netgroup_parseline (&cursor, result, buffer, buflen, errnop);
-
-  __libc_lock_unlock (lock);
-
-  return status;
+  return _nss_netgroup_parseline (&result->cursor, result, buffer, buflen,
+                                 errnop);
 }