aboutsummaryrefslogtreecommitdiff
path: root/usr/gen_initramfs.sh
diff options
context:
space:
mode:
authorMasahiro Yamada <masahiroy@kernel.org>2020-01-05 00:02:37 +0900
committerMasahiro Yamada <masahiroy@kernel.org>2020-01-16 00:26:21 +0900
commit65e00e04e5aea34b256814cfa21b32e3b94a2402 (patch)
tree59446df40381c120e9f06004b6bf700feddc1937 /usr/gen_initramfs.sh
parent469e87e89fd61de804bd29f6dd0380a399b567a7 (diff)
downloadlinux-stericsson-65e00e04e5aea34b256814cfa21b32e3b94a2402.tar.gz
initramfs: refactor the initramfs build rules
Currently, usr/gen_initramfs.sh takes care of all the use-cases: [1] generates a cpio file unless CONFIG_INITRAMFS_SOURCE points to a single cpio archive [2] If CONFIG_INITRAMFS_SOURCE is the path to a cpio archive, use it as-is. [3] Compress the cpio file according to CONFIG_INITRAMFS_COMPRESSION_* unless it is passed a compressed archive. To simplify the script, move [2] and [3] to usr/Makefile. If CONFIG_INITRAMFS_SOURCE is the path to a cpio archive, there is no need to run this shell script. For the cpio archive compression, you can re-use the rules from scripts/Makefile.lib . Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'usr/gen_initramfs.sh')
-rwxr-xr-xusr/gen_initramfs.sh77
1 files changed, 16 insertions, 61 deletions
diff --git a/usr/gen_initramfs.sh b/usr/gen_initramfs.sh
index 1efb87bda545..4e6715f8ff7f 100755
--- a/usr/gen_initramfs.sh
+++ b/usr/gen_initramfs.sh
@@ -5,7 +5,7 @@
# Released under the terms of the GNU GPL
#
# Generate a cpio packed initramfs. It uses gen_init_cpio to generate
-# the cpio archive, and then compresses it.
+# the cpio archive.
# This script assumes that gen_init_cpio is located in usr/ directory
# error out on errors
@@ -15,8 +15,7 @@ usage() {
cat << EOF
Usage:
$0 [-o <file>] [-l <dep_list>] [-u <uid>] [-g <gid>] {-d | <cpio_source>} ...
- -o <file> Create compressed initramfs file named <file> using
- gen_init_cpio and compressor depending on the extension
+ -o <file> Create initramfs file named <file> by using gen_init_cpio
-l <dep_list> Create dependency list named <dep_list>
-u <uid> User ID to map to user ID 0 (root).
<uid> is only meaningful if <cpio_source> is a
@@ -162,20 +161,12 @@ dir_filelist() {
fi
}
-# if only one file is specified and it is .cpio file then use it direct as fs
-# if a directory is specified then add all files in given direcotry to fs
-# if a regular file is specified assume it is in gen_init_cpio format
input_file() {
source="$1"
if [ -f "$1" ]; then
+ # If a regular file is specified, assume it is in
+ # gen_init_cpio format
header "$1"
- is_cpio="$(echo "$1" | sed 's/^.*\.cpio\(\..*\)\{0,1\}/cpio/')"
- if [ $2 -eq 0 -a ${is_cpio} = "cpio" ]; then
- cpio_file=$1
- echo "$1" | grep -q '^.*\.cpio\..*' && is_cpio_compressed="compressed"
- [ -n "$dep_list" ] && echo "$1" >> $dep_list
- return 0
- fi
print_mtime "$1" >> $cpio_list
cat "$1" >> $cpio_list
if [ -n "$dep_list" ]; then
@@ -187,6 +178,7 @@ input_file() {
done
fi
elif [ -d "$1" ]; then
+ # If a directory is specified then add all files in it to fs
dir_filelist "$1"
else
echo " ${prog}: Cannot open '$1'" >&2
@@ -198,12 +190,8 @@ prog=$0
root_uid=0
root_gid=0
dep_list=
-cpio_file=
cpio_list=$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX)
output="/dev/stdout"
-output_file="/dev/stdout"
-is_cpio_compressed=
-compr="gzip -n -9 -f"
while [ $# -gt 0 ]; do
arg="$1"
@@ -214,28 +202,8 @@ while [ $# -gt 0 ]; do
echo "deps_initramfs := \\" > $dep_list
shift
;;
- "-o") # generate compressed cpio image named $1
- output_file="$1"
- output=$cpio_list
- echo "$output_file" | grep -q "\.gz$" \
- && [ -x "`which gzip 2> /dev/null`" ] \
- && compr="gzip -n -9 -f"
- echo "$output_file" | grep -q "\.bz2$" \
- && [ -x "`which bzip2 2> /dev/null`" ] \
- && compr="bzip2 -9 -f"
- echo "$output_file" | grep -q "\.lzma$" \
- && [ -x "`which lzma 2> /dev/null`" ] \
- && compr="lzma -9 -f"
- echo "$output_file" | grep -q "\.xz$" \
- && [ -x "`which xz 2> /dev/null`" ] \
- && compr="xz --check=crc32 --lzma2=dict=1MiB"
- echo "$output_file" | grep -q "\.lzo$" \
- && [ -x "`which lzop 2> /dev/null`" ] \
- && compr="lzop -9 -f"
- echo "$output_file" | grep -q "\.lz4$" \
- && [ -x "`which lz4 2> /dev/null`" ] \
- && compr="lz4 -l -9 -f"
- echo "$output_file" | grep -q "\.cpio$" && compr="cat"
+ "-o") # generate cpio image named $1
+ output="$1"
shift
;;
"-u") # map $1 to uid=0 (root)
@@ -258,34 +226,21 @@ while [ $# -gt 0 ]; do
unknown_option
;;
*) # input file/dir - process it
- input_file "$arg" "$#"
+ input_file "$arg"
;;
esac
;;
esac
done
-# If output_file is set we will generate cpio archive and compress it
+# If output_file is set we will generate cpio archive
# we are careful to delete tmp files
-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 $timestamp"
- fi
+timestamp=
+if test -n "$KBUILD_BUILD_TIMESTAMP"; then
+ timestamp="$(date -d"$KBUILD_BUILD_TIMESTAMP" +%s || :)"
+ if test -n "$timestamp"; then
+ timestamp="-t $timestamp"
fi
- cpio_tfile="$(mktemp ${TMPDIR:-/tmp}/cpiofile.XXXXXX)"
- usr/gen_init_cpio $timestamp ${cpio_list} > ${cpio_tfile}
-else
- cpio_tfile=${cpio_file}
-fi
-rm ${cpio_list}
-if [ "${is_cpio_compressed}" = "compressed" ]; then
- cat ${cpio_tfile} > ${output_file}
-else
- (cat ${cpio_tfile} | ${compr} - > ${output_file}) \
- || (rm -f ${output_file} ; false)
fi
-[ -z ${cpio_file} ] && rm ${cpio_tfile}
-exit 0
+usr/gen_init_cpio $timestamp $cpio_list > $output
+rm $cpio_list