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/* Utilities for reading/writing fstab, mtab, etc.
Copyright (C) 1995-2020 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, see
<https://www.gnu.org/licenses/>. */
#include <mntent.h>
#include <stdlib.h>
#include <allocate_once.h>
struct mntent_buffer
{
struct mntent m;
char buffer[4096];
};
/* We don't want to allocate the static buffer all the time since it
is not always used (in fact, rather infrequently). */
libc_freeres_ptr (static void *mntent_buffer);
static void *
allocate (void *closure)
{
return malloc (sizeof (struct mntent_buffer));
}
static void
deallocate (void *closure, void *ptr)
{
free (ptr);
}
struct mntent *
getmntent (FILE *stream)
{
struct mntent_buffer *buffer = allocate_once (&mntent_buffer,
allocate, deallocate, NULL);
if (buffer == NULL)
/* If no core is available we don't have a chance to run the
program successfully and so returning NULL is an acceptable
result. */
return NULL;
return __getmntent_r (stream, &buffer->m,
buffer->buffer, sizeof (buffer->buffer));
}
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