initramfs: Use KBUILD_BUILD_TIMESTAMP for generated entries
gen_init_cpio gets the current time and uses it for each symlink,
special file, and directory. Grab the current time once and make it
possible to override it with the KBUILD_BUILD_TIMESTAMP variable for
reproducible builds.
Signed-off-by: Michal Marek <mmarek@suse.cz>
diff --git a/scripts/gen_initramfs_list.sh b/scripts/gen_initramfs_list.sh
index 4a43fe1..d44cf67 100644
--- a/scripts/gen_initramfs_list.sh
+++ b/scripts/gen_initramfs_list.sh
@@ -287,8 +287,15 @@
# we are carefull to delete tmp files
if [ ! -z ${output_file} ]; then
if [ -z ${cpio_file} ]; then
+ timestamp=
+ if test -n "$KBUILD_BUILD_TIMESTAMP"; then
+ timestamp="$(date -d"$KBUILD_BUILD_TIMESTAMP" +%s || :)"
+ if test -n "$timestamp"; then
+ timestamp="-t $timestamp"
+ fi
+ fi
cpio_tfile="$(mktemp ${TMPDIR:-/tmp}/cpiofile.XXXXXX)"
- usr/gen_init_cpio ${cpio_list} > ${cpio_tfile}
+ usr/gen_init_cpio $timestamp ${cpio_list} > ${cpio_tfile}
else
cpio_tfile=${cpio_file}
fi