1 /* Copyright (C) 1991, 1996, 1997, 1999, 2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
21 #include <bits/libc-lock.h>
26 /* We need to protect the dynamic buffer handling. */
27 __libc_lock_define_initialized (static, lock);
31 /* Read one entry from the given stream. */
33 fgetgrent (FILE *stream)
35 static size_t buffer_size;
36 static struct group resbuf;
41 if (__builtin_expect (fgetpos (stream, &pos), 0) != 0)
45 __libc_lock_lock (lock);
47 /* Allocate buffer if not yet available. */
50 buffer_size = NSS_BUFLEN_GROUP;
51 buffer = malloc (buffer_size);
55 && (__fgetgrent_r (stream, &resbuf, buffer, buffer_size, &result)
59 buffer_size += NSS_BUFLEN_GROUP;
60 new_buf = realloc (buffer, buffer_size);
61 if (__builtin_expect (new_buf == NULL, 0))
63 /* We are out of memory. Free the current buffer so that the
64 process gets a chance for a normal termination. */
71 /* Reset the stream. */
72 if (fsetpos (stream, &pos) != 0)
79 /* Release lock. Preserve error value. */
81 __libc_lock_unlock (lock);
88 /* Free all resources if necessary. */
89 static void __attribute__ ((unused))
96 text_set_element (__libc_subfreeres, free_mem);