diff options
Diffstat (limited to 'misc/mntent.c')
-rw-r--r-- | misc/mntent.c | 41 |
1 files changed, 23 insertions, 18 deletions
diff --git a/misc/mntent.c b/misc/mntent.c index 6718b56553..326c9cd641 100644 --- a/misc/mntent.c +++ b/misc/mntent.c @@ -1,5 +1,5 @@ /* Utilities for reading/writing fstab, mtab, etc. - Copyright (C) 1995-2018 Free Software Foundation, Inc. + Copyright (C) 1995-2019 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 @@ -14,40 +14,45 @@ You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ + <https://www.gnu.org/licenses/>. */ #include <mntent.h> #include <stdlib.h> -#include <libc-lock.h> +#include <allocate_once.h> -/* We don't want to allocate the static buffer all the time since it - is not always used (in fact, rather infrequently). Accept the - extra cost of a `malloc'. */ -libc_freeres_ptr (static char *getmntent_buffer); +struct mntent_buffer +{ + struct mntent m; + char buffer[4096]; +}; -/* This is the size of the buffer. This is really big. */ -#define BUFFER_SIZE 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 -allocate (void) +deallocate (void *closure, void *ptr) { - getmntent_buffer = (char *) malloc (BUFFER_SIZE); + free (ptr); } - struct mntent * getmntent (FILE *stream) { - static struct mntent m; - __libc_once_define (static, once); - __libc_once (once, allocate); - - if (getmntent_buffer == NULL) + 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, &m, getmntent_buffer, BUFFER_SIZE); + return __getmntent_r (stream, &buffer->m, + buffer->buffer, sizeof (buffer->buffer)); } |