#!/bin/bash
# Copyright (C) Martin Schlemmer <azarah@nosferatu.za.org>
-# Copyright (c) 2006 Sam Ravnborg <sam@ravnborg.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 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
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
+ -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.
+ <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.
+ <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
+ If <cpio_source> is a .cpio file it will be used
as direct input to initramfs.
-d Output the default cpio list.
EOF
}
+# awk style field access
+# $1 - field number; rest is argument string
+field() {
+ shift $1 ; echo $1
+}
+
list_default_initramfs() {
# echo usr/kinit/kinit
:
}
list_parse() {
- echo "$1 \\"
+ [ ! -L "$1" ] && echo "$1 \\" || :
}
# for each file print a line in following format
local gid="$4"
local ftype=$(filetype "${location}")
# remap uid/gid to 0 if necessary
- [ "$uid" -eq "$root_uid" ] && uid=0
- [ "$gid" -eq "$root_gid" ] && gid=0
+ [ "$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
str="${ftype} ${name} ${location} ${str}"
;;
"nod")
- local dev_type=
- local maj=$(LC_ALL=C ls -l "${location}" | \
- gawk '{sub(/,/, "", $5); print $5}')
- local min=$(LC_ALL=C ls -l "${location}" | \
- gawk '{print $6}')
-
- if [ -b "${location}" ]; then
- dev_type="b"
- else
- dev_type="c"
- fi
- str="${ftype} ${name} ${str} ${dev_type} ${maj} ${min}"
+ local dev=`LC_ALL=C ls -l "${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} ${min}"
;;
"slink")
- local target=$(LC_ALL=C ls -l "${location}" | \
- gawk '{print $11}')
+ local target=`readlink "${location}"`
str="${ftype} ${name} ${target} ${str}"
;;
*)
}
list_header() {
- echo "deps_initramfs := \\"
+ :
}
header() {
${dep_list}header "$1"
srcdir=$(echo "$1" | sed -e 's://*:/:g')
- dirlist=$(find "${srcdir}" -printf "%p %m %U %G\n" 2>/dev/null)
+ dirlist=$(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
source="$1"
if [ -f "$1" ]; then
${dep_list}header "$1"
- is_cpio="$(echo "$1" | sed 's/^.*\.cpio/cpio/')"
+ is_cpio="$(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
print_mtime "$1" >> ${output}
cat "$1" >> ${output}
else
- grep ^file "$1" | cut -d ' ' -f 3
+ 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"
cpio_list=
output="/dev/stdout"
output_file=""
+is_cpio_compressed=
+compr="gzip -9 -f"
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
+ "-o") # generate compressed cpio image named $1
shift
output_file="$1"
cpio_list="$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX)"
output=${cpio_list}
+ echo "$output_file" | grep -q "\.gz$" && compr="gzip -9 -f"
+ echo "$output_file" | grep -q "\.bz2$" && compr="bzip2 -9 -f"
+ echo "$output_file" | grep -q "\.lzma$" && compr="lzma -9 -f"
+ echo "$output_file" | grep -q "\.cpio$" && compr="cat"
shift
;;
esac
esac
done
-# If output_file is set we will generate cpio archive and gzip it
+# If output_file is set we will generate cpio archive and compress it
# we are carefull to delete tmp files
if [ ! -z ${output_file} ]; then
if [ -z ${cpio_file} ]; then
cpio_tfile=${cpio_file}
fi
rm ${cpio_list}
- cat ${cpio_tfile} | gzip -f -9 - > ${output_file}
+ if [ "${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
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