29 lines
835 B
Bash
Executable File
29 lines
835 B
Bash
Executable File
#!/bin/sh
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# Possibly resize root device (partition, filesystem), if underlying device was
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# enlarged.
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set -e
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# if underlying root device is read-only, don't do anything
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if [ "$(blockdev --getro /dev/xvda)" -eq "1" ]; then
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echo "xvda is read-only, not resizing" >&2
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exit 0
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fi
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sysfs_xvda="/sys/class/block/xvda"
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# if root filesystem is already using (almost) the whole disk
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# 203M for BIOS and /boot data, 222 for ext4 filesystem overhead
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# See QubesOS/qubes-core-agent-linux#146 for more details
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size_margin=$(((222 + 203) * 2 * 1024))
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rootfs_size=$(df --block-size=512 --output=size / | tail -n 1 | tr -d ' ')
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if [ "$(cat $sysfs_xvda/size)" -lt \
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$(( size_margin + rootfs_size )) ]; then
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echo "root filesystem already at $rootfs_size blocks" >&2
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exit 0
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fi
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# resize needed, do it
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/usr/lib/qubes/resize-rootfs
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