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busybox: S01mdev: fix module autoloading

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Commit b4fc5a180c (package/busybox: support spaces in module aliases in
mdev) changed the mdev coldplugging to handle sysfs path elements and
modalias values containing spaces.  This unfortunately doesn't work as was
recently reported:

http://lists.busybox.net/pipermail/buildroot/2018-May/220903.html

The problem is that sort -z also expects the fields of the input files to be
zero terminated, which is not the case for modalias sysfs entries.

So drop the -z option to sort.  Spaces in modalias entries could be handled
with the xargs -d '\n' option, but that is unfortunately not supported by
the busybox applet.  Instead, use tr to convert newlines to zeros so we can
use xargs -0.

Reported-by: Daniel Palmer <daniel@0x0f.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Peter Korsgaard 2018-05-07 20:35:01 +02:00 committed by Thomas Petazzoni
parent 56adbe8910
commit 61717b7b3e
1 changed files with 2 additions and 1 deletions
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package/busybox/S10mdev
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@ -9,7 +9,8 @@ case "$1" in
echo /sbin/mdev >/proc/sys/kernel/hotplug
/sbin/mdev -s
# coldplug modules
find /sys/ -name modalias -print0 | xargs -0 sort -u -z | xargs -0 modprobe -abq
find /sys/ -name modalias -print0 | xargs -0 sort -u | tr '\n' '\0' | \
xargs -0 modprobe -abq
;;
stop)
;;