aboutsummaryrefslogtreecommitdiff
path: root/misc/mntent.c
diff options
context:
space:
mode:
Diffstat (limited to 'misc/mntent.c')
-rw-r--r--misc/mntent.c42
1 files changed, 40 insertions, 2 deletions
diff --git a/misc/mntent.c b/misc/mntent.c
index 95f745ec78..b21f24e731 100644
--- a/misc/mntent.c
+++ b/misc/mntent.c
@@ -18,12 +18,50 @@
Boston, MA 02111-1307, USA. */
#include <mntent.h>
+#include <stdlib.h>
+#include <bits/libc-lock.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'. */
+static char *getmntent_buffer;
+
+/* This is the size of the buffer. This is really big. */
+#define BUFFER_SIZE 4096
+
+
+static void
+allocate (void)
+{
+ getmntent_buffer = (char *) malloc (BUFFER_SIZE);
+}
+
struct mntent *
getmntent (FILE *stream)
{
- static char buf[8192];
static struct mntent m;
+ __libc_once_define (static, once);
+ __libc_once (once, allocate);
- return __getmntent_r (stream, &m, buf, sizeof buf);
+ if (getmntent_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);
+}
+
+
+/* Make sure the memory is freed if the programs ends while in
+ memory-debugging mode and something actually was allocated. */
+static void
+__attribute__ ((unused))
+free_mem (void)
+{
+ if (getmntent_buffer != NULL)
+ free (getmntent_buffer);
}
+
+text_set_element (__libc_subfreeres, free_mem);