37 lines
996 B
Bash
Executable File
37 lines
996 B
Bash
Executable File
#!/bin/bash
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# readies a VHD device in Linux
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# nbd-mount /path/to/vhd /dev/nbd0
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APP_DIR="$(dirname "$0")"
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DRIVE="$1"
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DISK_LABEL="$2"
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DISK_PATH="/dev/disk/by-label/$DISK_LABEL"
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SLEEP_INTERVAL=0.5
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# refuse to connect twice
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EXISTING_DRIVE="$(losetup -l | tail -n +2 | tr -s ' ' | cut -f 6 | grep -w "$DRIVE")"
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if [ -n "$EXISTING_DRIVE" ]; then
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EXISTING_LOOP="$(losetup -l | tail -n +2 | tr -s ' ' | grep -w "$DRIVE" | cut -f 1 -d ' ')"
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if ! [ -L "$DISK_PATH" ] || ! [ -b "$DISK_PATH" ]; then
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echo "$DRIVE already mounted to $EXISTING_LOOP"
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exit 1
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fi
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LOOP_DEST="$(readlink -f $DISK_PATH)"
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if [ "$LOOP_DEST" != "$EXISTING_LOOP" ]; then
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echo "$DRIVE already mounted to $EXISTING_LOOP"
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exit 1
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fi
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# it's already mounted to the same destination
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exit 0
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fi
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# wait for device to appear
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if ! [ -e "$DISK_PATH" ]; then
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losetup -f "$DRIVE"
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# poll until the block device node appears or task times out
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until [ -L "$DISK_PATH" ] && [ -b "$DISK_PATH" ]; do
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sleep "$SLEEP_INTERVAL"
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done
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fi
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