#!/bin/bash
# Copyright (C) Martin Schlemmer <azarah@nosferatu.za.org>
-# 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 <sam@ravnborg.org>
#
-# 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 <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.
+ -g <gid> Group ID to map to group ID 0 (root).
+ <gid> is only meaningful if <cpio_source>
+ is a directory.
+ <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
+}
+
+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
+# <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 "${location}")
+ # remap uid/gid to 0 if necessary
+ [ "$uid" -eq "$root_uid" ] && uid=0
+ [ "$gid" -eq "$root_gid" ] && gid=0
local str="${mode} ${uid} ${gid}"
[ "${ftype}" == "invalid" ] && return 0
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
git://git.onelab.eu / linux-2.6.git / blobdiff