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-rw-r--r--nss/getXXent.c71
1 files changed, 52 insertions, 19 deletions
diff --git a/nss/getXXent.c b/nss/getXXent.c
index 7e291e6298..2d6d1c32e6 100644
--- a/nss/getXXent.c
+++ b/nss/getXXent.c
@@ -1,20 +1,24 @@
/* Copyright (C) 1996 Free Software Foundation, Inc.
-This file is part of the GNU C Library.
+ 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 Library General Public License as
-published by the Free Software Foundation; either version 2 of the
-License, or (at your option) any later version.
+ 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.
-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.
+ 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.
-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 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. */
+
+#include <errno.h>
+#include <libc-lock.h>
+#include <stdlib.h>
#include "nsswitch.h"
@@ -55,18 +59,47 @@ extern int INTERNAL (REENTRANT_GETNAME) (LOOKUP_TYPE *resbuf, char *buffer,
size_t buflen, LOOKUP_TYPE **result
H_ERRNO_PARM);
+/* We need to protect the dynamic buffer handling. */
+__libc_lock_define_initialized (static, lock);
+
LOOKUP_TYPE *
GETFUNC_NAME (void)
{
- static char buffer[BUFLEN];
+ static char *buffer;
+ static size_t buffer_size;
static LOOKUP_TYPE resbuf;
- LOOKUP_TYPE *result;
+ LOOKUP_TYPE *result = NULL;
+ int save;
+
+ /* Get lock. */
+ __libc_lock_lock (lock);
+
+ if (buffer == NULL)
+ {
+ buffer_size = BUFLEN;
+ buffer = malloc (buffer_size);
+ }
+
+ while (buffer != NULL
+ && INTERNAL (REENTRANT_GETNAME) (&resbuf, buffer, buffer_size, &result
+ H_ERRNO_VAR) != 0
+ && errno == ERANGE)
+ {
+ char *new_buf;
+ buffer_size += BUFLEN;
+ new_buf = realloc (buffer, buffer_size);
+ if (new_buf == NULL)
+ /* We are out of memory. Free the current buffer so that the
+ process gets a chance for a normal termination. */
+ free (buffer);
+ buffer = new_buf;
+ }
- if (INTERNAL (REENTRANT_GETNAME) (&resbuf, buffer, BUFLEN, &result
- H_ERRNO_VAR) != 0)
- /* Errors occured. */
- return NULL;
+ /* Release lock. Preserve error value. */
+ save = errno;
+ __libc_lock_unlock (lock);
+ __set_errno (save);
return result;
}