4816680ba6
sfdisk is a bit crusty - it doesn't understand gpt partition tables very well, for example. By switching to parted, we can handle gpt issues (which may be useful in the future, and is definitely useful for other boards), and we no longer have to hardcode that 4M alignment workaround. Parted will tell us the free space at the end of the disk. Because we're already using partprobe, there's no additional dependencies needed.
54 lines
1.4 KiB
Bash
Executable file
54 lines
1.4 KiB
Bash
Executable file
#!/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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# Parted will detect if the GPT label is messed up and fix it
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# automatically, we just need to tell it to do so.
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parted -s $rootdev print 2>&1 | grep -z "fix the GPT" && {
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echo "Fix" | parted ---pretend-input-tty $rootdev print
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}
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# Check if there's free space at the end of the device
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free_space="$(parted -m -s $rootdev print free | tail -n1 | grep free)"
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if test -z "$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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parted -s $rootdev resizepart $rootpart_nr 100%
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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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