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37 lines
753 B
37 lines
753 B
#!/bin/sh
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#
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# umount qemu image file
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#
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prog=$(basename "$0")
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# use sudo for unprivileged users
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SUDO=
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[ "$(id -u)" -ne 0 ] && SUDO=sudo
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# check command line
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if [ $# -ne 1 ] || [ "$1" = "-h" ] || [ "$1" = "-?" ]; then
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cat << EOF >&2
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Unmount the qemu image file
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Usage: $prog <qemu_image or mount_point>
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EOF
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exit 1
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fi
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# argument
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mount="$1"
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full_mount=$(readlink -f "$mount")
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# get the nbd device
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nbd_path=$(grep -l -F -x "$full_mount" /tmp/nbd*.mount 2> /dev/null)
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if [ -z "$nbd_path" ]; then
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echo "$prog: $mount not mounted"
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exit 1
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fi
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nbd=$(basename "$nbd_path" .mount)
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# umount and detach
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sync
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$SUDO sh -c "mount | grep -E -o '^/dev/$nbd(\b|p[0-9]*)' | sort -u | xargs -r umount && qemu-nbd -d '/dev/$nbd'" || exit $?
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rm -f "/tmp/${nbd}.mount"
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