X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=scripts%2Fgen_initramfs_list.sh;h=4c723fd18648daba8926e8b73e727b45c90fc1d9;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=2a697c37135ed2ac4682ae9c9d2d214594356dda;hpb=87fc8d1bb10cd459024a742c6a10961fefcef18f;p=linux-2.6.git diff --git a/scripts/gen_initramfs_list.sh b/scripts/gen_initramfs_list.sh index 2a697c371..4c723fd18 100644 --- a/scripts/gen_initramfs_list.sh +++ b/scripts/gen_initramfs_list.sh @@ -1,61 +1,114 @@ #!/bin/bash # Copyright (C) Martin Schlemmer -# Released under the terms of the GNU GPL -# -# Generate a newline separated list of entries from the file/directory pointed -# out by the environment variable: CONFIG_INITRAMFS_SOURCE -# -# If CONFIG_INITRAMFS_SOURCE is non-existing then generate a small dummy file. +# Copyright (c) 2006 Sam Ravnborg # -# The output is suitable for gen_init_cpio as found in usr/Makefile. +# Released under the terms of the GNU GPL # -# TODO: Add support for symlinks, sockets and pipes when gen_init_cpio -# supports them. +# 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 -simple_initramfs() { - cat <<-EOF - # This is a very simple initramfs +usage() { +cat << EOF +Usage: +$0 [-o ] [-u ] [-g ] {-d | } ... + -o Create gzipped initramfs file named using + gen_init_cpio and gzip + -u User ID to map to user ID 0 (root). + is only meaningful if + is a directory. + -g Group ID to map to group ID 0 (root). + is only meaningful if + is a directory. + File list or directory for cpio archive. + If 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 + options so an explicit "-u 0 -g 0" is required +to reset the root/group mapping. +EOF +} + +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="$1" - if [ -f "${argv1}" ]; then + # 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 argv1="$1" local my_mtime="0" - if [ -e "${argv1}" ]; then - my_mtime=$(find "${argv1}" -printf "%T@\n" | sort -r | head -n 1) + if [ -e "$1" ]; then + my_mtime=$(find "$1" -printf "%T@\n" | sort -r | head -n 1) fi - - echo "# Last modified: ${my_mtime}" - echo + + echo "# Last modified: ${my_mtime}" >> ${output} + echo "" >> ${output} } +list_parse() { + echo "$1 \\" +} + +# for each file print a line in following format +# +# 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 "${location}") + # remap uid/gid to 0 if necessary + [ "$uid" -eq "$root_uid" ] && uid=0 + [ "$gid" -eq "$root_gid" ] && gid=0 local str="${mode} ${uid} ${gid}" [ "${ftype}" == "invalid" ] && return 0 @@ -79,40 +132,156 @@ parse() { fi str="${ftype} ${name} ${str} ${dev_type} ${maj} ${min}" ;; + "slink") + local target=$(LC_ALL=C ls -l "${location}" | \ + gawk '{print $11}') + str="${ftype} ${name} ${target} ${str}" + ;; *) str="${ftype} ${name} ${str}" ;; esac - echo "${str}" + echo "${str}" >> ${output} return 0 } -if [ -z "$1" ]; then - simple_initramfs -elif [ -f "$1" ]; then - print_mtime "$1" - cat "$1" -elif [ -d "$1" ]; then +unknown_option() { + printf "ERROR: unknown option \"$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" 2>/dev/null) # If $dirlist is only one line, then the directory is empty if [ "$(echo "${dirlist}" | wc -l)" -gt 1 ]; then - print_mtime "$1" - + ${dep_list}print_mtime "$1" + echo "${dirlist}" | \ while read x; do - parse ${x} + ${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 + [ ! -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 - # Failsafe in case directory is empty - simple_initramfs + echo " ${prog}: Cannot open '$1'" >&2 + exit 1 fi -else - echo " $0: Cannot open '$1' (CONFIG_INITRAMFS_SOURCE)" >&2 - exit 1 -fi +} + +prog=$0 +root_uid=0 +root_gid=0 +dep_list= +cpio_file= +cpio_list= +output="/dev/stdout" +output_file="" +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} + cat ${cpio_tfile} | gzip -f -9 - > ${output_file} + [ -z ${cpio_file} ] && rm ${cpio_tfile} +fi exit 0