Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

#!/bin/bash

# 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 gzip to pack 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 gzipped initramfs file named <file> using

                       gen_init_cpio and gzip

        -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() {

        echo "$1 \\"

}

# 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="${name//\/\///}"

        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=`field 11 $(LC_ALL=C ls -l "${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")

        # 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\(\..*\)\?/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

                        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=

arg="$1"

case "$arg" in

        "-l")   # files included in initramfs - used by kbuild

                dep_list="list_"

                echo "deps_initramfs := \\"

                shift

                ;;

        "-o")   # generate gzipped cpio image named $1

                shift

                output_file="$1"

                cpio_list="$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX)"

                output=${cpio_list}

                shift

                ;;

esac

while [ $# -gt 0 ]; do

        arg="$1"

        shift

        case "$arg" in

                "-u")   # map $1 to uid=0 (root)

                        root_uid="$1"

                        shift

                        ;;

                "-g")   # map $1 to gid=0 (root)

                        root_gid="$1"

                        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 gzip it

# we are carefull to delete tmp files

if [ ! -z ${output_file} ]; then

        if [ -z ${cpio_file} ]; then

                cpio_tfile="$(mktemp ${TMPDIR:-/tmp}/cpiofile.XXXXXX)"

                usr/gen_init_cpio ${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} | gzip -f -9 - > ${output_file}

        fi

        [ -z ${cpio_file} ] && rm ${cpio_tfile}

fi

exit 0