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