mdev: safer handling of $SUBSYSTEM in mdev -s
diff --git a/util-linux/mdev.c b/util-linux/mdev.c
index 0f7e082..2451cca 100644
--- a/util-linux/mdev.c
+++ b/util-linux/mdev.c
@@ -1,6 +1,5 @@
/* vi: set sw=4 ts=4: */
/*
- *
* mdev - Mini udev for busybox
*
* Copyright 2005 Rob Landley <rob@landley.net>
@@ -8,7 +7,6 @@
*
* Licensed under GPL version 2, see file LICENSE in this tarball for details.
*/
-
#include "libbb.h"
#include "xregex.h"
@@ -353,11 +351,13 @@
void *userData UNUSED_PARAM,
int depth)
{
- /* Extract device subsystem -- the name of the directory under /sys/class/ */
+ /* Extract device subsystem -- the name of the directory
+ * under /sys/class/ */
if (1 == depth) {
+ free(subsystem);
subsystem = strrchr(fileName, '/');
if (subsystem)
- subsystem++;
+ subsystem = xstrdup(subsystem + 1);
}
return (depth >= MAX_SYSFS_DEPTH ? SKIP : TRUE);
@@ -397,17 +397,17 @@
goto out;
loading:
- /* tell kernel we're loading by `echo 1 > /sys/$DEVPATH/loading` */
+ /* tell kernel we're loading by "echo 1 > /sys/$DEVPATH/loading" */
if (full_write(loading_fd, "1", 1) != 1)
goto out;
- /* load firmware by `cat /lib/firmware/$FIRMWARE > /sys/$DEVPATH/data */
+ /* load firmware into /sys/$DEVPATH/data */
data_fd = open("data", O_WRONLY);
if (data_fd == -1)
goto out;
cnt = bb_copyfd_eof(firmware_fd, data_fd);
- /* tell kernel result by `echo [0|-1] > /sys/$DEVPATH/loading` */
+ /* tell kernel result by "echo [0|-1] > /sys/$DEVPATH/loading" */
if (cnt > 0)
full_write(loading_fd, "0", 1);
else
