51 lines
1.2 KiB
Plaintext
51 lines
1.2 KiB
Plaintext
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#!/bin/sh
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set -e
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#
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# List the soft prerequisites here. This is a space separated list of
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# names, of scripts that are in the same directory as this one, that
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# must be run before this one can be.
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#
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PREREQS=""
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case $1 in
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prereqs) echo "$PREREQS"; exit 0;;
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esac
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. /scripts/functions
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# Given the root partition, get the underlying device and partition number
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rootpart=$(realpath $ROOT)
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rootpart_nr=$(blkid -sPART_ENTRY_NUMBER -o value -p $rootpart)
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rootdev="/dev/$(lsblk -no pkname "$rootpart")"
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# Check if there's free space on the device (note: we align the first
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# partition at 4MB, so there's always at least 3MB free)
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free_space="$(sfdisk -qF $rootdev | tail -n1 | grep -v [^0-9]3M)"
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if test -z "$free_space"; then
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# Great, we already resized; nothing left to do!
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exit 0
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fi
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log_begin_msg "$0 resizing $ROOT"
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# Unmount for safety
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umount "${rootmnt}"
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# Expand the partition size to fill the entire device
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sfdisk -f $rootdev -N $rootpart_nr <<EOF
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,+
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EOF
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wait_for_udev 5
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# Now resize the filesystem
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partprobe $rootdev
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resize2fs $rootpart
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# Remount root
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if ! mount -r ${FSTYPE:+-t "${FSTYPE}"} ${ROOTFLAGS} "${ROOT}" "${rootmnt?}"; then
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panic "Failed to mount ${ROOT} as root file system."
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fi
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log_end_msg
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