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#!/bin/sh
# required binaries: cat grep
if grep -q 'test.expect=none' /proc/cmdline; then
if grep -q " overlay " /proc/mounts; then
echo "overlay filesystem found in /proc/mounts" >> /run/failed
fi
else
if ! grep -q " overlay " /proc/mounts; then
echo "overlay filesystem not found in /proc/mounts" >> /run/failed
fi
if ! echo > /test-overlay-write; then
echo "overlay is not writable" >> /run/failed
fi
fi
if grep -q 'test.expect=device' /proc/cmdline; then
if ! grep -q "/run/overlayfs-backing" /proc/mounts; then
echo "persistent overlay device not mounted at /run/overlayfs-backing" >> /run/failed
fi
else
if grep -q "/run/overlayfs-backing" /proc/mounts; then
echo "persistent overlay device is mounted at /run/overlayfs-backing" >> /run/failed
fi
fi
# Dump /proc/mounts at the end if there were any failures for easier debugging
if [ -s /run/failed ]; then
{
echo ">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> /proc/mounts >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>"
cat /proc/mounts
echo "<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< /proc/mounts <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<"
} >> /run/failed
fi
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