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initramfs: Use KBUILD_BUILD_TIMESTAMP for generated entries

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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>
This commit is contained in:
Michal Marek 2011-03-31 23:16:42 +02:00
parent 53e6892c04
commit a8b8017c34
3 changed files with 50 additions and 15 deletions
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9
scripts/gen_initramfs_list.sh
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@ -287,8 +287,15 @@ done
# 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