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#!/bin/sh
set -e
is_fs() {
local fs_type
fs_type="$(stat --file-system --format=%T "$2" 2> /dev/null)"
if [ "$fs_type" = "$1" ]; then return 0; fi
return 1
}
is_merged() {
local directories="/bin /sbin /lib"
for dir in $directories; do
[ -e "$dir" ] || continue
[ "$(readlink -f "$dir")" = "/usr$dir" ] || return 1
done
# Avoid an exact match, as the target might vary depending on the tool
# building the image. For example, systemd-nspawn links /lib64 to
# /usr/lib/aarch64-linux-gnu on arm64, while on amd64 debootstrap links it to
# /usr/lib64 and doesn't create it at all on arm64.
# See: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1019575
local arch_directories="/lib64 /lib32 /libo32 /libx32"
for dir in $arch_directories; do
[ -e "$dir" ] || continue
case "$(readlink -f "$dir")" in
"/usr/lib"*) ;;
*) return 1;;
esac
done
return 0
}
maybe_convert() {
# do not try to run the program if the system has already been converted
if is_merged; then return; fi
if is_fs nfs / || is_fs nfs /usr; then
cat << 'END' >&2
Warning: NFS detected, /usr/lib/usrmerge/convert-usrmerge will not be run
automatically. See #842145 for details.
END
return 1
fi
/usr/lib/usrmerge/convert-usrmerge || return $?
if which update-shells > /dev/null; then
update-shells
fi
/usr/lib/usrmerge/convert-etc-shells || return $?
}
cleanup_biarch_dirs() {
dpkg --compare-versions "$2" lt "36~" || return 0
# bootstrapping or earlier conversions may have created empty biarch
# directories and links. glibc 2.35-4 or later will create them if needed,
# so clean up the unused (and unowned) ones
local arch_directories="/lib64 /lib32 /libo32 /libx32"
for dir in $arch_directories; do
[ -e "$dir" ] || continue
if ! dpkg-query -S $dir >/dev/null 2>&1; then
rm -v $dir
if [ -e /usr$dir ] && ! dpkg-query -S /usr$dir >/dev/null 2>&1 ; then
rmdir --ignore-fail-on-non-empty -v /usr$dir
fi
fi
done
}
case "$1" in
configure)
# skipping the conversion is not supported anymore
if [ -e /etc/unsupported-skip-usrmerge-conversion ] && \
grep -q 'this system will not be supported in the future' \
/etc/unsupported-skip-usrmerge-conversion; then
echo "E: /etc/unsupported-skip-usrmerge-conversion exists." >&2
exit 1
else
maybe_convert "$@" || { echo "E: usrmerge failed." >&2; exit 1; }
cleanup_biarch_dirs
fi
;;
esac
#DEBHELPER#
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