mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-09 23:00:07 +00:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
96 lines
2.4 KiB
C
96 lines
2.4 KiB
C
/* Copyright (C) 1991, 1996, 1997, 1999, 2000 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 <errno.h>
|
|
#include <grp.h>
|
|
#include <bits/libc-lock.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
|
|
/* We need to protect the dynamic buffer handling. */
|
|
__libc_lock_define_initialized (static, lock);
|
|
|
|
static char *buffer;
|
|
|
|
/* Read one entry from the given stream. */
|
|
struct group *
|
|
fgetgrent (FILE *stream)
|
|
{
|
|
static size_t buffer_size;
|
|
static struct group resbuf;
|
|
fpos_t pos;
|
|
struct group *result;
|
|
int save;
|
|
|
|
if (__builtin_expect (fgetpos (stream, &pos), 0) != 0)
|
|
return NULL;
|
|
|
|
/* Get lock. */
|
|
__libc_lock_lock (lock);
|
|
|
|
/* Allocate buffer if not yet available. */
|
|
if (buffer == NULL)
|
|
{
|
|
buffer_size = NSS_BUFLEN_GROUP;
|
|
buffer = malloc (buffer_size);
|
|
}
|
|
|
|
while (buffer != NULL
|
|
&& (__fgetgrent_r (stream, &resbuf, buffer, buffer_size, &result)
|
|
== ERANGE))
|
|
{
|
|
char *new_buf;
|
|
buffer_size += NSS_BUFLEN_GROUP;
|
|
new_buf = realloc (buffer, buffer_size);
|
|
if (__builtin_expect (new_buf == NULL, 0))
|
|
{
|
|
/* We are out of memory. Free the current buffer so that the
|
|
process gets a chance for a normal termination. */
|
|
save = errno;
|
|
free (buffer);
|
|
__set_errno (save);
|
|
}
|
|
buffer = new_buf;
|
|
|
|
/* Reset the stream. */
|
|
if (fsetpos (stream, &pos) != 0)
|
|
buffer = NULL;
|
|
}
|
|
|
|
if (buffer == NULL)
|
|
result = NULL;
|
|
|
|
/* Release lock. Preserve error value. */
|
|
save = errno;
|
|
__libc_lock_unlock (lock);
|
|
__set_errno (save);
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/* Free all resources if necessary. */
|
|
static void __attribute__ ((unused))
|
|
free_mem (void)
|
|
{
|
|
free (buffer);
|
|
}
|
|
|
|
text_set_element (__libc_subfreeres, free_mem);
|