[net-next-2.6.git] / scripts / gen_initramfs_list.sh

#!/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 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() {
	[ ! -L "$1" ] && 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} ${min}"
			;;
		"slink")
			local target=`readlink "${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")

	# 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
		        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 -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 "$output_file" | grep -q "\.gz$" && 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 "$output_file" | grep -q "\.lzo$" && compr="lzop -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"
			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 compress 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} | ${compr}  - > ${output_file}) \
		|| (rm -f ${output_file} ; false)
	fi
	[ -z ${cpio_file} ] && rm ${cpio_tfile}
fi
exit 0
Commit	Line	Data
1da177e4 LT	1	#!/bin/bash
1da177e4 LT	2	# Copyright (C) Martin Schlemmer <azarah@nosferatu.za.org>
f6112ec2	3	# Copyright (C) 2006 Sam Ravnborg <sam@ravnborg.org>
1da177e4	4	#
d39a206b	5	# Released under the terms of the GNU GPL
1da177e4	6	#
d39a206b	7	# Generate a cpio packed initramfs. It uses gen_init_cpio to generate
a26ee60f	8	# the cpio archive, and then compresses it.
d39a206b SR	9	# The script may also be used to generate the inputfile used for gen_init_cpio
	10	# This script assumes that gen_init_cpio is located in usr/ directory
	11
	12	# error out on errors
	13	set -e
	14
	15	usage() {
	16	cat << EOF
	17	Usage:
	18	$0 [-o <file>] [-u <uid>] [-g <gid>] {-d \| <cpio_source>} ...
a26ee60f AK	19	-o <file> Create compressed initramfs file named <file> using
a26ee60f AK	20	gen_init_cpio and compressor depending on the extension
d39a206b	21	-u <uid> User ID to map to user ID 0 (root).
4c6f2eb9 MF	22	<uid> is only meaningful if <cpio_source> is a
4c6f2eb9 MF	23	directory. "squash" forces all files to uid 0.
d39a206b	24	-g <gid> Group ID to map to group ID 0 (root).
4c6f2eb9 MF	25	<gid> is only meaningful if <cpio_source> is a
4c6f2eb9 MF	26	directory. "squash" forces all files to gid 0.
d39a206b	27	<cpio_source> File list or directory for cpio archive.
f6112ec2	28	If <cpio_source> is a .cpio file it will be used
d39a206b SR	29	as direct input to initramfs.
	30	-d Output the default cpio list.
	31
	32	All options except -o and -l may be repeated and are interpreted
	33	sequentially and immediately. -u and -g states are preserved across
	34	<cpio_source> options so an explicit "-u 0 -g 0" is required
	35	to reset the root/group mapping.
	36	EOF
	37	}
	38
f6112ec2 OV	39	# awk style field access
	40	# $1 - field number; rest is argument string
	41	field() {
	42	shift $1 ; echo $1
	43	}
	44
d39a206b SR	45	list_default_initramfs() {
	46	# echo usr/kinit/kinit
	47	:
	48	}
1da177e4 LT	49
1da177e4 LT	50	default_initramfs() {
d39a206b	51	cat <<-EOF >> ${output}
1da177e4 LT	52	# This is a very simple, default initramfs
	53
	54	dir /dev 0755 0 0
	55	nod /dev/console 0600 0 0 c 5 1
	56	dir /root 0700 0 0
d39a206b SR	57	# file /kinit usr/kinit/kinit 0755 0 0
d39a206b SR	58	# slink /init kinit 0755 0 0
1da177e4 LT	59	EOF
	60	}
	61
	62	filetype() {
	63	local argv1="$1"
	64
	65	# symlink test must come before file test
	66	if [ -L "${argv1}" ]; then
	67	echo "slink"
	68	elif [ -f "${argv1}" ]; then
	69	echo "file"
	70	elif [ -d "${argv1}" ]; then
	71	echo "dir"
	72	elif [ -b "${argv1}" -o -c "${argv1}" ]; then
	73	echo "nod"
	74	elif [ -p "${argv1}" ]; then
	75	echo "pipe"
	76	elif [ -S "${argv1}" ]; then
	77	echo "sock"
	78	else
	79	echo "invalid"
	80	fi
	81	return 0
	82	}
	83
d39a206b SR	84	list_print_mtime() {
	85	:
	86	}
	87
1da177e4	88	print_mtime() {
1da177e4 LT	89	local my_mtime="0"
1da177e4 LT	90
d39a206b SR	91	if [ -e "$1" ]; then
d39a206b SR	92	my_mtime=$(find "$1" -printf "%T@\n" \| sort -r \| head -n 1)
1da177e4	93	fi
d39a206b SR	94
	95	echo "# Last modified: ${my_mtime}" >> ${output}
	96	echo "" >> ${output}
	97	}
	98
	99	list_parse() {
9e5ec861	100	[ ! -L "$1" ] && echo "$1 \\" \|\| :
1da177e4 LT	101	}
1da177e4 LT	102
d39a206b SR	103	# for each file print a line in following format
	104	# <filetype> <name> <path to file> <octal mode> <uid> <gid>
	105	# for links, devices etc the format differs. See gen_init_cpio for details
1da177e4 LT	106	parse() {
	107	local location="$1"
	108	local name="${location/${srcdir}//}"
	109	# change '//' into '/'
	110	name="${name//\/\///}"
	111	local mode="$2"
	112	local uid="$3"
	113	local gid="$4"
	114	local ftype=$(filetype "${location}")
	115	# remap uid/gid to 0 if necessary
4c6f2eb9 MF	116	[ "$root_uid" = "squash" ] && uid=0 \|\| [ "$uid" -eq "$root_uid" ] && uid=0
4c6f2eb9 MF	117	[ "$root_gid" = "squash" ] && gid=0 \|\| [ "$gid" -eq "$root_gid" ] && gid=0
1da177e4 LT	118	local str="${mode} ${uid} ${gid}"
	119
	120	[ "${ftype}" == "invalid" ] && return 0
	121	[ "${location}" == "${srcdir}" ] && return 0
	122
	123	case "${ftype}" in
	124	"file")
	125	str="${ftype} ${name} ${location} ${str}"
	126	;;
	127	"nod")
f6112ec2 OV	128	local dev=`LC_ALL=C ls -l "${location}"`
	129	local maj=`field 5 ${dev}`
	130	local min=`field 6 ${dev}`
	131	maj=${maj%,}
	132
	133	[ -b "${location}" ] && dev="b" \|\| dev="c"
	134
	135	str="${ftype} ${name} ${str} ${dev} ${maj} ${min}"
1da177e4 LT	136	;;
1da177e4 LT	137	"slink")
b5a5e4c7	138	local target=`readlink "${location}"`
1da177e4 LT	139	str="${ftype} ${name} ${target} ${str}"
	140	;;
	141	*)
	142	str="${ftype} ${name} ${str}"
	143	;;
	144	esac
	145
d39a206b	146	echo "${str}" >> ${output}
1da177e4 LT	147
	148	return 0
	149	}
	150
d39a206b SR	151	unknown_option() {
	152	printf "ERROR: unknown option \"$arg\"\n" >&2
	153	printf "If the filename validly begins with '-', " >&2
	154	printf "then it must be prefixed\n" >&2
	155	printf "by './' so that it won't be interpreted as an option." >&2
	156	printf "\n" >&2
	157	usage >&2
	158	exit 1
	159	}
	160
	161	list_header() {
a26d79ca	162	:
d39a206b SR	163	}
	164
	165	header() {
	166	printf "\n#####################\n# $1\n" >> ${output}
	167	}
	168
	169	# process one directory (incl sub-directories)
	170	dir_filelist() {
	171	${dep_list}header "$1"
	172
	173	srcdir=$(echo "$1" \| sed -e 's://*:/:g')
eda890af	174	dirlist=$(find "${srcdir}" -printf "%p %m %U %G\n")
d39a206b SR	175
	176	# If $dirlist is only one line, then the directory is empty
	177	if [ "$(echo "${dirlist}" \| wc -l)" -gt 1 ]; then
	178	${dep_list}print_mtime "$1"
	179
	180	echo "${dirlist}" \| \
	181	while read x; do
	182	${dep_list}parse ${x}
	183	done
	184	fi
1da177e4 LT	185	}
1da177e4 LT	186
d39a206b SR	187	# if only one file is specified and it is .cpio file then use it direct as fs
	188	# if a directory is specified then add all files in given direcotry to fs
	189	# if a regular file is specified assume it is in gen_initramfs format
	190	input_file() {
	191	source="$1"
	192	if [ -f "$1" ]; then
	193	${dep_list}header "$1"
c299ec2d	194	is_cpio="$(echo "$1" \| sed 's/^.\.cpio\(\..\)\?/cpio/')"
d39a206b SR	195	if [ $2 -eq 0 -a ${is_cpio} == "cpio" ]; then
d39a206b SR	196	cpio_file=$1
c299ec2d	197	echo "$1" \| grep -q '^.\.cpio\..' && is_cpio_compressed="compressed"
d39a206b SR	198	[ ! -z ${dep_list} ] && echo "$1"
	199	return 0
	200	fi
	201	if [ -z ${dep_list} ]; then
	202	print_mtime "$1" >> ${output}
	203	cat "$1" >> ${output}
1da177e4	204	else
b8341936	205	echo "$1 \\"
46ed981d SR	206	cat "$1" \| while read type dir file perm ; do
	207	if [ "$type" == "file" ]; then
	208	echo "$file \\";
	209	fi
	210	done
1da177e4	211	fi
d39a206b SR	212	elif [ -d "$1" ]; then
d39a206b SR	213	dir_filelist "$1"
1da177e4	214	else
d39a206b	215	echo " ${prog}: Cannot open '$1'" >&2
1da177e4 LT	216	exit 1
	217	fi
	218	}
	219
d39a206b	220	prog=$0
1da177e4 LT	221	root_uid=0
1da177e4 LT	222	root_gid=0
d39a206b SR	223	dep_list=
	224	cpio_file=
	225	cpio_list=
	226	output="/dev/stdout"
	227	output_file=""
c299ec2d	228	is_cpio_compressed=
a26ee60f	229	compr="gzip -9 -f"
1da177e4	230
d39a206b SR	231	arg="$1"
	232	case "$arg" in
	233	"-l") # files included in initramfs - used by kbuild
	234	dep_list="list_"
b8341936	235	echo "deps_initramfs := $0 \\"
d39a206b SR	236	shift
d39a206b SR	237	;;
a26ee60f	238	"-o") # generate compressed cpio image named $1
d39a206b SR	239	shift
	240	output_file="$1"
	241	cpio_list="$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX)"
	242	output=${cpio_list}
a26ee60f AK	243	echo "$output_file" \| grep -q "\.gz$" && compr="gzip -9 -f"
	244	echo "$output_file" \| grep -q "\.bz2$" && compr="bzip2 -9 -f"
	245	echo "$output_file" \| grep -q "\.lzma$" && compr="lzma -9 -f"
2a2a400f	246	echo "$output_file" \| grep -q "\.lzo$" && compr="lzop -9 -f"
a26ee60f	247	echo "$output_file" \| grep -q "\.cpio$" && compr="cat"
d39a206b SR	248	shift
	249	;;
	250	esac
1da177e4 LT	251	while [ $# -gt 0 ]; do
	252	arg="$1"
	253	shift
	254	case "$arg" in
d39a206b	255	"-u") # map $1 to uid=0 (root)
1da177e4 LT	256	root_uid="$1"
	257	shift
	258	;;
d39a206b	259	"-g") # map $1 to gid=0 (root)
1da177e4 LT	260	root_gid="$1"
	261	shift
	262	;;
d39a206b	263	"-d") # display default initramfs list
1da177e4	264	default_list="$arg"
d39a206b	265	${dep_list}default_initramfs
1da177e4 LT	266	;;
	267	"-h")
	268	usage
	269	exit 0
	270	;;
	271	*)
	272	case "$arg" in
	273	"-"*)
d39a206b	274	unknown_option
1da177e4	275	;;
d39a206b SR	276	*) # input file/dir - process it
d39a206b SR	277	input_file "$arg" "$#"
1da177e4 LT	278	;;
	279	esac
	280	;;
	281	esac
	282	done
	283
a26ee60f	284	# If output_file is set we will generate cpio archive and compress it
d39a206b SR	285	# we are carefull to delete tmp files
	286	if [ ! -z ${output_file} ]; then
	287	if [ -z ${cpio_file} ]; then
	288	cpio_tfile="$(mktemp ${TMPDIR:-/tmp}/cpiofile.XXXXXX)"
	289	usr/gen_init_cpio ${cpio_list} > ${cpio_tfile}
	290	else
	291	cpio_tfile=${cpio_file}
	292	fi
	293	rm ${cpio_list}
c299ec2d AL	294	if [ "${is_cpio_compressed}" = "compressed" ]; then
	295	cat ${cpio_tfile} > ${output_file}
	296	else
ab59d3b7 AK	297	(cat ${cpio_tfile} \| ${compr} - > ${output_file}) \
ab59d3b7 AK	298	\|\| (rm -f ${output_file} ; false)
c299ec2d	299	fi
d39a206b SR	300	[ -z ${cpio_file} ] && rm ${cpio_tfile}
d39a206b SR	301	fi
1da177e4	302	exit 0