2 # Copyright (C) Martin Schlemmer <azarah@nosferatu.za.org>
3 # Copyright (C) 2006 Sam Ravnborg <sam@ravnborg.org>
5 # Released under the terms of the GNU GPL
7 # Generate a cpio packed initramfs. It uses gen_init_cpio to generate
8 # the cpio archive, and then compresses it.
9 # This script assumes that gen_init_cpio is located in usr/ directory
17 $0 [-o <file>] [-l <dep_list>] [-u <uid>] [-g <gid>] {-d | <cpio_source>} ...
18 -o <file> Create compressed initramfs file named <file> using
19 gen_init_cpio and compressor depending on the extension
20 -l <dep_list> Create dependency list named <dep_list>
21 -u <uid> User ID to map to user ID 0 (root).
22 <uid> is only meaningful if <cpio_source> is a
23 directory. "squash" forces all files to uid 0.
24 -g <gid> Group ID to map to group ID 0 (root).
25 <gid> is only meaningful if <cpio_source> is a
26 directory. "squash" forces all files to gid 0.
27 <cpio_source> File list or directory for cpio archive.
28 If <cpio_source> is a .cpio file it will be used
29 as direct input to initramfs.
31 All options except -o and -l may be repeated and are interpreted
32 sequentially and immediately. -u and -g states are preserved across
33 <cpio_source> options so an explicit "-u 0 -g 0" is required
34 to reset the root/group mapping.
38 # awk style field access
39 # $1 - field number; rest is argument string
47 # symlink test must come before file test
48 if [ -L "${argv1}" ]; then
50 elif [ -f "${argv1}" ]; then
52 elif [ -d "${argv1}" ]; then
54 elif [ -b "${argv1}" -o -c "${argv1}" ]; then
56 elif [ -p "${argv1}" ]; then
58 elif [ -S "${argv1}" ]; then
70 my_mtime=$(find "$1" -printf "%T@\n" | sort -r | head -n 1)
73 echo "# Last modified: ${my_mtime}" >> $cpio_list
78 if [ -z "$dep_list" -o -L "$1" ]; then
81 echo "$1" | sed 's/:/\\:/g; s/$/ \\/' >> $dep_list
84 # for each file print a line in following format
85 # <filetype> <name> <path to file> <octal mode> <uid> <gid>
86 # for links, devices etc the format differs. See gen_init_cpio for details
89 local name="/${location#${srcdir}}"
90 # change '//' into '/'
91 name=$(echo "$name" | sed -e 's://*:/:g')
95 local ftype=$(filetype "${location}")
96 # remap uid/gid to 0 if necessary
97 [ "$root_uid" = "squash" ] && uid=0 || [ "$uid" -eq "$root_uid" ] && uid=0
98 [ "$root_gid" = "squash" ] && gid=0 || [ "$gid" -eq "$root_gid" ] && gid=0
99 local str="${mode} ${uid} ${gid}"
101 [ "${ftype}" = "invalid" ] && return 0
102 [ "${location}" = "${srcdir}" ] && return 0
106 str="${ftype} ${name} ${location} ${str}"
109 local dev="`LC_ALL=C ls -l "${location}"`"
110 local maj=`field 5 ${dev}`
111 local min=`field 6 ${dev}`
114 [ -b "${location}" ] && dev="b" || dev="c"
116 str="${ftype} ${name} ${str} ${dev} ${maj} ${min}"
119 local target=`readlink "${location}"`
120 str="${ftype} ${name} ${target} ${str}"
123 str="${ftype} ${name} ${str}"
127 echo "${str}" >> $cpio_list
133 printf "ERROR: unknown option \"$arg\"\n" >&2
134 printf "If the filename validly begins with '-', " >&2
135 printf "then it must be prefixed\n" >&2
136 printf "by './' so that it won't be interpreted as an option." >&2
143 printf "\n#####################\n# $1\n" >> $cpio_list
146 # process one directory (incl sub-directories)
150 srcdir=$(echo "$1" | sed -e 's://*:/:g')
151 dirlist=$(find "${srcdir}" -printf "%p %m %U %G\n" | LANG=C sort)
153 # If $dirlist is only one line, then the directory is empty
154 if [ "$(echo "${dirlist}" | wc -l)" -gt 1 ]; then
157 echo "${dirlist}" | \
165 # if only one file is specified and it is .cpio file then use it direct as fs
166 # if a directory is specified then add all files in given direcotry to fs
167 # if a regular file is specified assume it is in gen_init_cpio format
172 is_cpio="$(echo "$1" | sed 's/^.*\.cpio\(\..*\)\{0,1\}/cpio/')"
173 if [ $2 -eq 0 -a ${is_cpio} = "cpio" ]; then
175 echo "$1" | grep -q '^.*\.cpio\..*' && is_cpio_compressed="compressed"
176 [ -n "$dep_list" ] && echo "$1" >> $dep_list
179 print_mtime "$1" >> $cpio_list
180 cat "$1" >> $cpio_list
181 if [ -n "$dep_list" ]; then
182 echo "$1 \\" >> $dep_list
183 cat "$1" | while read type dir file perm ; do
184 if [ "$type" = "file" ]; then
185 echo "$file \\" >> $dep_list
189 elif [ -d "$1" ]; then
192 echo " ${prog}: Cannot open '$1'" >&2
202 cpio_list=$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX)
204 output_file="/dev/stdout"
206 compr="gzip -n -9 -f"
208 while [ $# -gt 0 ]; do
212 "-l") # files included in initramfs - used by kbuild
214 echo "deps_initramfs := \\" > $dep_list
217 "-o") # generate compressed cpio image named $1
220 echo "$output_file" | grep -q "\.gz$" \
221 && [ -x "`which gzip 2> /dev/null`" ] \
222 && compr="gzip -n -9 -f"
223 echo "$output_file" | grep -q "\.bz2$" \
224 && [ -x "`which bzip2 2> /dev/null`" ] \
225 && compr="bzip2 -9 -f"
226 echo "$output_file" | grep -q "\.lzma$" \
227 && [ -x "`which lzma 2> /dev/null`" ] \
228 && compr="lzma -9 -f"
229 echo "$output_file" | grep -q "\.xz$" \
230 && [ -x "`which xz 2> /dev/null`" ] \
231 && compr="xz --check=crc32 --lzma2=dict=1MiB"
232 echo "$output_file" | grep -q "\.lzo$" \
233 && [ -x "`which lzop 2> /dev/null`" ] \
234 && compr="lzop -9 -f"
235 echo "$output_file" | grep -q "\.lz4$" \
236 && [ -x "`which lz4 2> /dev/null`" ] \
237 && compr="lz4 -l -9 -f"
238 echo "$output_file" | grep -q "\.cpio$" && compr="cat"
241 "-u") # map $1 to uid=0 (root)
243 [ "$root_uid" = "-1" ] && root_uid=$(id -u || echo 0)
246 "-g") # map $1 to gid=0 (root)
248 [ "$root_gid" = "-1" ] && root_gid=$(id -g || echo 0)
260 *) # input file/dir - process it
261 input_file "$arg" "$#"
268 # If output_file is set we will generate cpio archive and compress it
269 # we are careful to delete tmp files
270 if [ -z ${cpio_file} ]; then
272 if test -n "$KBUILD_BUILD_TIMESTAMP"; then
273 timestamp="$(date -d"$KBUILD_BUILD_TIMESTAMP" +%s || :)"
274 if test -n "$timestamp"; then
275 timestamp="-t $timestamp"
278 cpio_tfile="$(mktemp ${TMPDIR:-/tmp}/cpiofile.XXXXXX)"
279 usr/gen_init_cpio $timestamp ${cpio_list} > ${cpio_tfile}
281 cpio_tfile=${cpio_file}
284 if [ "${is_cpio_compressed}" = "compressed" ]; then
285 cat ${cpio_tfile} > ${output_file}
287 (cat ${cpio_tfile} | ${compr} - > ${output_file}) \
288 || (rm -f ${output_file} ; false)
290 [ -z ${cpio_file} ] && rm ${cpio_tfile}