79 lines
2.5 KiB
Bash
79 lines
2.5 KiB
Bash
#!/bin/sh
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MIN_DISK_SPACE_MB=1000
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list_disks() {
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lsblk -o NAME -r -d -n
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}
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main() {
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local disks=$(list_disks)
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local found_free_space=0
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local found_device=""
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for device_name in ${disks}; do
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local device="/dev/${device_name}"
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echo "Checking disk '$device'..."
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local disk_free_space="$(parted $device unit MB print free 2>/dev/null | grep 'Free Space' | tail -n1 | awk '{ print $3 }')"
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disk_free_space=${disk_free_space%MB}
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disk_free_space=$(printf '%.0f' "${disk_free_space:-0}")
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echo "Free space on disk: ${disk_free_space}"
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if [ ! -z "${disk_free_space}" ]; then
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if [ ${disk_free_space} -gt ${found_free_space} ]; then
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found_free_space=${disk_free_space}
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found_device=${device}
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fi
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fi
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done
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if [ -z "${found_device}" ] || [ ${MIN_DISK_SPACE_MB} -gt ${found_free_space} ]; then
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echo "No device with sufficient remaining disk space, exiting."
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exit 1
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fi
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echo "Creating new partition on '${found_device}' with remaining disk free space"
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local last_partition_end_mb=$(parted "$found_device" unit MB print | awk '/^ [0-9]+ / {start=$3} END {print int(start)}')
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if [ "${last_partition_end_mb}" != "0" ]; then
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parted -s "${found_device}" -f -a opt mkpart primary "${last_partition_end_mb}MB" '100%'
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else
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parted -s "${found_device}" -f -a opt mkpart primary '0%' '100%'
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fi
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sync
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local last_partition_number=$(parted ${found_device} print | grep -o -e '^ [0-9]*' | awk '{print $1}' | tail -n 1)
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local new_partition_device=$(lsblk -r -n -o PARTN,NAME ${found_device} | awk -v partition_number="${last_partition_number}" '$1 == partition_number {print $2}')
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mkfs.ext4 -F /dev/${new_partition_device}
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if [ $? -ne 0 ]; then
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echo "Could not initialize filesystem on new partition !"
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exit 1
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fi
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local new_partition_uuid=$(lsblk -r -n -o PARTN,UUID ${found_device} | awk -v partition_number="${last_partition_number}" '$1 == partition_number {print $2}')
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if [ -z "${new_partition_uuid}" ]; then
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echo "Could not find partition with number '${last_partition_number}' !"
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exit 1
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fi
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umount -f /data
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rm -rf /data
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mkdir -p /data
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uci add fstab mount
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uci set fstab.@mount[-1].target='/data'
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uci set fstab.@mount[-1].uuid=${new_partition_uuid}
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uci set fstab.@mount[-1].enabled='1'
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uci commit fstab
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reload_config
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}
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main |