32 lines
723 B
Bash
Executable file
32 lines
723 B
Bash
Executable file
#!/bin/sh
|
|
#
|
|
# Show device mapper slave devices. This is useful for looking up the
|
|
# /dev/sd* devices associated with a dm or multipath device. For example:
|
|
#
|
|
# $ ls /sys/block/dm-113/slaves/
|
|
# sddt sdjw
|
|
#
|
|
|
|
if [ "$1" = "-h" ] ; then
|
|
echo "Show device mapper slave devices."
|
|
exit
|
|
fi
|
|
|
|
dev="$VDEV_PATH"
|
|
|
|
# If the VDEV path is a symlink, resolve it to a real device
|
|
if [ -L "$dev" ] ; then
|
|
dev=$(readlink "$dev")
|
|
fi
|
|
|
|
dev=$(basename "$dev")
|
|
val=""
|
|
if [ -d "/sys/class/block/$dev/slaves" ] ; then
|
|
# ls -C: output in columns, no newlines
|
|
val=$(ls -C "/sys/class/block/$dev/slaves")
|
|
|
|
# ls -C will print two spaces between files; change to one space.
|
|
val=$(echo "$val" | sed -r 's/[[:blank:]]+/ /g')
|
|
fi
|
|
|
|
echo "slaves=$val"
|