60 lines
2.3 KiB
Bash
60 lines
2.3 KiB
Bash
|
#!/bin/sh
|
||
|
|
#
|
||
|
|
# The systemd-tmpfiles has the ability to grab information
|
||
|
|
# from the filesystem (instead from the running system).
|
||
|
|
#
|
||
|
|
# tmpfs directories (/tmp, /proc, ...) are skipped since they're not
|
||
|
|
# relevant for the rootfs image.
|
||
|
|
#
|
||
|
|
# However there are a few specifiers that *always* will grab
|
||
|
|
# information from the running system examples are %a, %b, %m, %H
|
||
|
|
# (Architecture, Boot UUID, Machine UUID, Hostname).
|
||
|
|
#
|
||
|
|
# See [1] for historic information.
|
||
|
|
#
|
||
|
|
# This script will (conservatively) skip tmpfiles lines that have
|
||
|
|
# such an specifier to prevent leaking host information.
|
||
|
|
#
|
||
|
|
# shell expansion is critical to be POSIX compliant,
|
||
|
|
# this script wont work with zsh in its default mode for example.
|
||
|
|
#
|
||
|
|
# The script takes several measures to handle more complex stuff
|
||
|
|
# like passing this correctly:
|
||
|
|
# f+ "/var/example" - - - - %B\n%o\n%w\n%W%%\n
|
||
|
|
#
|
||
|
|
# [1] - https://github.com/systemd/systemd/pull/16187
|
||
|
|
|
||
|
|
[ -n "${HOST_SYSTEMD_TMPFILES-}" ] ||
|
||
|
|
HOST_SYSTEMD_TMPFILES=systemd-tmpfiles
|
||
|
|
|
||
|
|
[ -n "${1-}" -a -d "${1-}"/usr/lib/tmpfiles.d ] ||
|
||
|
|
{ echo 1>&2 "$0: need ROOTFS argument"; exit 1; }
|
||
|
|
|
||
|
|
${HOST_SYSTEMD_TMPFILES} --no-pager --cat-config --root="$1" |
|
||
|
|
sed -e '/^[[:space:]]*#/d' -e 's,^[[:space:]]*,,' -e '/^$/d' |
|
||
|
|
while read -r line; do
|
||
|
|
# it is allowed to use quotes around arguments,
|
||
|
|
# so let the shell pack the arguments
|
||
|
|
eval "set -- $line"
|
||
|
|
|
||
|
|
# dont output warnings for directories we dont process
|
||
|
|
[ "${2#/dev}" = "${2}" ] && [ "${2#/proc}" = "${2}" ] &&
|
||
|
|
[ "${2#/run}" = "${2}" ] && [ "${2#/sys}" = "${2}" ] &&
|
||
|
|
[ "${2#/tmp}" = "${2}" ] && [ "${2#/mnt}" = "${2}" ] ||
|
||
|
|
continue
|
||
|
|
|
||
|
|
# blank out all specs that are ok to use,
|
||
|
|
# test if some remain. (Specs up to date with v250)
|
||
|
|
if echo "$2 ${7-}" | sed -e 's,%[%BCEgGhLMosStTuUVwW],,g' | grep -v -q '%'; then
|
||
|
|
# no "bad" specifiers, pass the line unmodified
|
||
|
|
eval "printf '%s\n' '$line'"
|
||
|
|
else
|
||
|
|
# warn
|
||
|
|
eval "printf 'ignored spec: %s\n' '$line' 1>&2"
|
||
|
|
fi
|
||
|
|
done |
|
||
|
|
TMPDIR= TEMP= TMP= ${HOST_SYSTEMD_TMPFILES} --create --boot --root="$1" \
|
||
|
|
--exclude-prefix=/dev --exclude-prefix=/proc --exclude-prefix=/run \
|
||
|
|
--exclude-prefix=/sys --exclude-prefix=/tmp --exclude-prefix=/mnt \
|
||
|
|
-
|