initramfs: move gen_initramfs_list.sh from scripts/ to usr/

scripts/gen_initramfs_list.sh is only invoked from usr/Makefile.
Move it so that all tools to create initramfs are self-contained
in the usr/ directory.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

2 files changed, 329 insertions, 1 deletions

diff --git a/usr/Makefile b/usr/Makefile
index 237a028693ce..748f6a60bb1e 100644
--- a/usr/Makefile
+++ b/usr/Makefile
@@ -24,7 +24,7 @@ $(obj)/initramfs_data.o: $(obj)/$(datafile_y) FORCE
 # Generate the initramfs cpio archive
 
 hostprogs-y := gen_init_cpio
-initramfs   := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh
+initramfs   := $(CONFIG_SHELL) $(srctree)/$(src)/gen_initramfs_list.sh
 ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \
                         $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d)
 ramfs-args  := \
diff --git a/usr/gen_initramfs_list.sh b/usr/gen_initramfs_list.sh
new file mode 100755
index 000000000000..0aad760fcd8c
--- /dev/null
+++ b/usr/gen_initramfs_list.sh
@@ -0,0 +1,328 @@
+#!/bin/sh
+# Copyright (C) Martin Schlemmer <azarah@nosferatu.za.org>
+# Copyright (C) 2006 Sam Ravnborg <sam@ravnborg.org>
+#
+# 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 script may also be used to generate the inputfile used for gen_init_cpio
+# This script assumes that gen_init_cpio is located in usr/ directory
+
+# error out on errors
+set -e
+
+usage() {
+cat << EOF
+Usage:
+$0 [-o <file>] [-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
+        -u <uid>       User ID to map to user ID 0 (root).
+                       <uid> is only meaningful if <cpio_source> is a
+                       directory.  "squash" forces all files to uid 0.
+        -g <gid>       Group ID to map to group ID 0 (root).
+                       <gid> is only meaningful if <cpio_source> is a
+                       directory.  "squash" forces all files to gid 0.
+        <cpio_source>  File list or directory for cpio archive.
+                       If <cpio_source> is a .cpio file it will be used
+                       as direct input to initramfs.
+        -d             Output the default cpio list.
+
+All options except -o and -l may be repeated and are interpreted
+sequentially and immediately.  -u and -g states are preserved across
+<cpio_source> options so an explicit "-u 0 -g 0" is required
+to reset the root/group mapping.
+EOF
+}
+
+# awk style field access
+# $1 - field number; rest is argument string
+field() {
+        shift $1 ; echo $1
+}
+
+list_default_initramfs() {
+        # echo usr/kinit/kinit
+        :
+}
+
+default_initramfs() {
+        cat <<-EOF >> ${output}
+                # This is a very simple, default initramfs
+
+                dir /dev 0755 0 0
+                nod /dev/console 0600 0 0 c 5 1
+                dir /root 0700 0 0
+                # file /kinit usr/kinit/kinit 0755 0 0
+                # slink /init kinit 0755 0 0
+        EOF
+}
+
+filetype() {
+        local argv1="$1"
+
+        # symlink test must come before file test
+        if [ -L "${argv1}" ]; then
+                echo "slink"
+        elif [ -f "${argv1}" ]; then
+                echo "file"
+        elif [ -d "${argv1}" ]; then
+                echo "dir"
+        elif [ -b "${argv1}" -o -c "${argv1}" ]; then
+                echo "nod"
+        elif [ -p "${argv1}" ]; then
+                echo "pipe"
+        elif [ -S "${argv1}" ]; then
+                echo "sock"
+        else
+                echo "invalid"
+        fi
+        return 0
+}
+
+list_print_mtime() {
+        :
+}
+
+print_mtime() {
+        local my_mtime="0"
+
+        if [ -e "$1" ]; then
+                my_mtime=$(find "$1" -printf "%T@\n" | sort -r | head -n 1)
+        fi
+
+        echo "# Last modified: ${my_mtime}" >> ${output}
+        echo "" >> ${output}
+}
+
+list_parse() {
+        if [ -L "$1" ]; then
+                return
+        fi
+        echo "$1" | sed 's/:/\\:/g; s/$/ \\/'
+}
+
+# for each file print a line in following format
+# <filetype> <name> <path to file> <octal mode> <uid> <gid>
+# for links, devices etc the format differs. See gen_init_cpio for details
+parse() {
+        local location="$1"
+        local name="/${location#${srcdir}}"
+        # change '//' into '/'
+        name=$(echo "$name" | sed -e 's://*:/:g')
+        local mode="$2"
+        local uid="$3"
+        local gid="$4"
+        local ftype=$(filetype "${location}")
+        # remap uid/gid to 0 if necessary
+        [ "$root_uid" = "squash" ] && uid=0 || [ "$uid" -eq "$root_uid" ] && uid=0
+        [ "$root_gid" = "squash" ] && gid=0 || [ "$gid" -eq "$root_gid" ] && gid=0
+        local str="${mode} ${uid} ${gid}"
+
+        [ "${ftype}" = "invalid" ] && return 0
+        [ "${location}" = "${srcdir}" ] && return 0
+
+        case "${ftype}" in
+                "file")
+                        str="${ftype} ${name} ${location} ${str}"
+                        ;;
+                "nod")
+                        local dev=`LC_ALL=C ls -l "${location}"`
+                        local maj=`field 5 ${dev}`
+                        local min=`field 6 ${dev}`
+                        maj=${maj%,}
+
+                        [ -b "${location}" ] && dev="b" || dev="c"
+
+                        str="${ftype} ${name} ${str} ${dev} ${maj} ${min}"
+                        ;;
+                "slink")
+                        local target=`readlink "${location}"`
+                        str="${ftype} ${name} ${target} ${str}"
+                        ;;
+                *)
+                        str="${ftype} ${name} ${str}"
+                        ;;
+        esac
+
+        echo "${str}" >> ${output}
+
+        return 0
+}
+
+unknown_option() {
+        printf "ERROR: unknown option \"$arg\"\n" >&2
+        printf "If the filename validly begins with '-', " >&2
+        printf "then it must be prefixed\n" >&2
+        printf "by './' so that it won't be interpreted as an option." >&2
+        printf "\n" >&2
+        usage >&2
+        exit 1
+}
+
+list_header() {
+        :
+}
+
+header() {
+        printf "\n#####################\n# $1\n" >> ${output}
+}
+
+# process one directory (incl sub-directories)
+dir_filelist() {
+        ${dep_list}header "$1"
+
+        srcdir=$(echo "$1" | sed -e 's://*:/:g')
+        dirlist=$(find "${srcdir}" -printf "%p %m %U %G\n" | LANG=C sort)
+
+        # If $dirlist is only one line, then the directory is empty
+        if [  "$(echo "${dirlist}" | wc -l)" -gt 1 ]; then
+                ${dep_list}print_mtime "$1"
+
+                echo "${dirlist}" | \
+                while read x; do
+                        ${dep_list}parse ${x}
+                done
+        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_initramfs format
+input_file() {
+        source="$1"
+        if [ -f "$1" ]; then
+                ${dep_list}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"
+                        [ ! -z ${dep_list} ] && echo "$1"
+                        return 0
+                fi
+                if [ -z ${dep_list} ]; then
+                        print_mtime "$1" >> ${output}
+                        cat "$1"         >> ${output}
+                else
+                        echo "$1 \\"
+                        cat "$1" | while read type dir file perm ; do
+                                if [ "$type" = "file" ]; then
+                                        echo "$file \\";
+                                fi
+                        done
+                fi
+        elif [ -d "$1" ]; then
+                dir_filelist "$1"
+        else
+                echo "  ${prog}: Cannot open '$1'" >&2
+                exit 1
+        fi
+}
+
+prog=$0
+root_uid=0
+root_gid=0
+dep_list=
+cpio_file=
+cpio_list=
+output="/dev/stdout"
+output_file=""
+is_cpio_compressed=
+compr="gzip -n -9 -f"
+
+arg="$1"
+case "$arg" in
+        "-l")   # files included in initramfs - used by kbuild
+                dep_list="list_"
+                echo "deps_initramfs := $0 \\"
+                shift
+                ;;
+        "-o")   # generate compressed cpio image named $1
+                shift
+                output_file="$1"
+                cpio_list="$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX)"
+                output=${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"
+                shift
+                ;;
+esac
+while [ $# -gt 0 ]; do
+        arg="$1"
+        shift
+        case "$arg" in
+                "-u")   # map $1 to uid=0 (root)
+                        root_uid="$1"
+                        [ "$root_uid" = "-1" ] && root_uid=$(id -u || echo 0)
+                        shift
+                        ;;
+                "-g")   # map $1 to gid=0 (root)
+                        root_gid="$1"
+                        [ "$root_gid" = "-1" ] && root_gid=$(id -g || echo 0)
+                        shift
+                        ;;
+                "-d")   # display default initramfs list
+                        default_list="$arg"
+                        ${dep_list}default_initramfs
+                        ;;
+                "-h")
+                        usage
+                        exit 0
+                        ;;
+                *)
+                        case "$arg" in
+                                "-"*)
+                                        unknown_option
+                                        ;;
+                                *)      # input file/dir - process it
+                                        input_file "$arg" "$#"
+                                        ;;
+                        esac
+                        ;;
+        esac
+done
+
+# If output_file is set we will generate cpio archive and compress it
+# we are careful 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 $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}
+fi
+exit 0