63 lines
1.7 KiB
Bash
63 lines
1.7 KiB
Bash
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#!/bin/sh -e
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logger -t "rc.resizedata" "Expanding root partition"
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# Detect root partition device
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ROOT_PART=$(mount | sed -n 's|^/dev/\(.*\) on / .*|\1|p')
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if [ -z "$ROOT_PART" ] ; then
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log_warning_msg "unable to detect root partition device"
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return 1
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fi
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# Extract root device name
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case "${ROOT_PART}" in
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mmcblk0*) ROOT_DEV=mmcblk0 ;;
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sda*) ROOT_DEV=sda ;;
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esac
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# get last partition
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LAST_PART_NUM=$(parted /dev/${ROOT_DEV} -ms unit s p | tail -n 1 | cut -f 1 -d:)
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LAST_PART="${ROOT_DEV}p${LAST_PART_NUM}"
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# unmount if mounted
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if grep -qs "/dev/${LAST_PART}" /proc/mounts; then
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umount /dev/${LAST_PART}
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fi
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# Get the starting offset of last partition
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PART_START=$(parted /dev/${ROOT_DEV} -ms unit s p | grep "^${LAST_PART_NUM}" | cut -f 2 -d: | sed 's/[^0-9]//g')
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if [ -z "$PART_START" ] ; then
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logger -t "rc.resizedata" "${ROOT_DEV} unable to get starting sector of the partition"
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return 1
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fi
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# Get the possible last sector for the root partition
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PART_LAST=$(fdisk -l /dev/${ROOT_DEV} | grep '^Disk.*sectors' | awk '{ print $7 - 1 }')
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if [ -z "$PART_LAST" ] ; then
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logger -t "rc.resizedata" "${ROOT_DEV} unable to get last sector of the partition"
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return 1
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fi
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### Since rc.local is run with "sh -e", let's add "|| true" to prevent premature exit
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echo "resize partition"
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fdisk /dev/${ROOT_DEV} > /dev/null <<EOF2 || true
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p
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d
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$LAST_PART_NUM
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n
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p
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$LAST_PART_NUM
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$PART_START
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$PART_LAST
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p
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w
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EOF2
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# Reload the partition table, resize root filesystem then remove resizing code from this file
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partprobe /dev/${ROOT_DEV} &&
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resize2fs -p /dev/${LAST_PART} &&
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logger -t "rc.resizedata" "Root partition successfully resized."
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mount -a
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rm -f /etc/local.d/90-resizedata.start
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