36 lines
777 B
Bash
Executable File
36 lines
777 B
Bash
Executable File
#!/bin/bash
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# disconnects a VHD device from linux (should be unmounted)
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# nbd-unmount path-to-vhd
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DRIVE="$1"
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QEMU_NBD_COMMAND="ps aux|grep '[q]emu-nbd.*--connect='|tr -s ' '|cut -f 11- -d ' '"
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if [ -z "$DRIVE" ]; then
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echo "Drive not provided"
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exit 1
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fi
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if ! [ -f "$DRIVE" ]; then
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echo "$DRIVE not existing"
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exit 1
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fi
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# iterate over all mounted nbds
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NBD_TARGET=
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while read MOUNT; do
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if echo "$MOUNT" | egrep "$DRIVE$" > /dev/null; then
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NBD_TARGET="$(echo "$MOUNT" | sed -E 's!.*(--connect=?|-c\s+)([^[:space:]]+).*!\2!g')"
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fi
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done < <(eval "$QEMU_NBD_COMMAND")
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if [ -z "$NBD_TARGET" ]; then
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echo "$DRIVE not mounted"
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exit 1
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fi
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if mount | grep ^"$NBD_TARGET" -q ; then
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echo "$NBD_TARGET mounted, refusing to detach"
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exit 1
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fi
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qemu-nbd --disconnect=$NBD_TARGET
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