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|
summary: Ensure that the writable paths on the image are correct
details: |
The file writable-paths allows specific paths in the root partition filesystem
to be made writable, whilst leaving the rest of the root filesystem read-only.
It does this by creating overlaying writable mounts on top of the read-only
root filesystem. These writable mounts are backed to the writable partition.
This test ensures everything in writable-paths is actually writable by checking
in the paths declared in /etc/system-image/writable-paths.
execute: |
echo "Ensure everything in writable-paths is actually writable"
#shellcheck disable=SC2002
cat /etc/system-image/writable-paths | while read -r line; do
line=$(echo "$line" | sed -e '/\s*#.*$/d')
if [ -z "$line" ]; then
continue;
fi
# a writable-path may be either a file or a directory
dir_or_file=$(echo "$line"|cut -f1 -d' ')
# fun! systemd is playing tricks with /etc/machine-id
# and mounts a RO tmpfs on top of the writable one which
# means we cannot touch this file
if [ "$dir_or_file" = "/etc/machine-id" ]; then
continue;
fi
if [ ! -e "$dir_or_file" ]; then
echo "$dir_or_file" >> missing
elif [ -f "$dir_or_file" ]; then
if ! touch "$dir_or_file"; then
echo "$dir_or_file" >> broken
fi
elif ! touch "$dir_or_file"/random-name-that-I-made-up; then
echo "$dir_or_file" >> broken
fi
rm -f "$dir_or_file"/random-name-that-I-made-up
done
if [ -s "broken" ]; then
echo "The following writable paths are not writable:"
cat broken
fi
if [ -s "missing" ]; then
echo "The following writable paths are missing:"
cat missing
fi
# FIMXE: make missing fatal as well
#if [ -s missing ] || [ -s broken ]; then
# exit 1
#fi
if [ -s broken ]; then
exit 1
fi
|
