/* Utilities for reading/writing fstab, mtab, etc. Copyright (C) 1995-2023 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> #include <set-freeres.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). */ 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)); } weak_alias (mntent_buffer, __libc_mntent_freemem_ptr)