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List:       busybox
Subject:    Online resizing of partitions
From:       Marcus Hoffmann <bubu () bubu1 ! eu>
Date:       2019-10-07 14:36:26
Message-ID: 132742f9-83a5-dccc-6804-0c6c82cc5645 () bubu1 ! eu
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Hello,

I was wondering if there's a way to enlarge a mounted disk partition
with busybox tools only.

I found a relatively straightforward way with (s)fdisk and partx or
resizepart from util-linux. Using fdisk from busybox is probably a bit
more fiddly but should be possible.

I haven't found a replacement for partx/resizepart though which tells
the kernel the new partition size.

Resizepart basically only wraps BLKPG_RESIZE_PARTITION ioctl, so it's
easy to write a small tool myself, but I wondered if this is ossible
with on-board tools from busybox or if you'd consider adding some
version of partx or resizepart to busybox.

Best,
Marcus

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