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153f0114 | 1 | #!/bin/sh |
1da177e4 | 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 |
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 |
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 |
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 | |
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 |
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" |
90 | ||
d39a206b SR |
91 | if [ -e "$1" ]; then |
92 | my_mtime=$(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() { | |
590abbdd MM |
100 | if [ -L "$1" ]; then |
101 | return | |
102 | fi | |
103 | echo "$1" | sed 's/:/\\:/g; s/$/ \\/' | |
1da177e4 LT |
104 | } |
105 | ||
d39a206b SR |
106 | # for each file print a line in following format |
107 | # <filetype> <name> <path to file> <octal mode> <uid> <gid> | |
108 | # for links, devices etc the format differs. See gen_init_cpio for details | |
1da177e4 LT |
109 | parse() { |
110 | local location="$1" | |
153f0114 | 111 | local name="/${location#${srcdir}}" |
1da177e4 | 112 | # change '//' into '/' |
153f0114 | 113 | name=$(echo "$name" | sed -e 's://*:/:g') |
1da177e4 LT |
114 | local mode="$2" |
115 | local uid="$3" | |
116 | local gid="$4" | |
117 | local ftype=$(filetype "${location}") | |
118 | # remap uid/gid to 0 if necessary | |
4c6f2eb9 MF |
119 | [ "$root_uid" = "squash" ] && uid=0 || [ "$uid" -eq "$root_uid" ] && uid=0 |
120 | [ "$root_gid" = "squash" ] && gid=0 || [ "$gid" -eq "$root_gid" ] && gid=0 | |
1da177e4 LT |
121 | local str="${mode} ${uid} ${gid}" |
122 | ||
153f0114 JS |
123 | [ "${ftype}" = "invalid" ] && return 0 |
124 | [ "${location}" = "${srcdir}" ] && return 0 | |
1da177e4 LT |
125 | |
126 | case "${ftype}" in | |
127 | "file") | |
128 | str="${ftype} ${name} ${location} ${str}" | |
129 | ;; | |
130 | "nod") | |
cc976614 | 131 | local dev="`LC_ALL=C ls -l "${location}"`" |
f6112ec2 OV |
132 | local maj=`field 5 ${dev}` |
133 | local min=`field 6 ${dev}` | |
134 | maj=${maj%,} | |
135 | ||
136 | [ -b "${location}" ] && dev="b" || dev="c" | |
137 | ||
138 | str="${ftype} ${name} ${str} ${dev} ${maj} ${min}" | |
1da177e4 LT |
139 | ;; |
140 | "slink") | |
b5a5e4c7 | 141 | local target=`readlink "${location}"` |
1da177e4 LT |
142 | str="${ftype} ${name} ${target} ${str}" |
143 | ;; | |
144 | *) | |
145 | str="${ftype} ${name} ${str}" | |
146 | ;; | |
147 | esac | |
148 | ||
d39a206b | 149 | echo "${str}" >> ${output} |
1da177e4 LT |
150 | |
151 | return 0 | |
152 | } | |
153 | ||
d39a206b SR |
154 | unknown_option() { |
155 | printf "ERROR: unknown option \"$arg\"\n" >&2 | |
156 | printf "If the filename validly begins with '-', " >&2 | |
157 | printf "then it must be prefixed\n" >&2 | |
158 | printf "by './' so that it won't be interpreted as an option." >&2 | |
159 | printf "\n" >&2 | |
160 | usage >&2 | |
161 | exit 1 | |
162 | } | |
163 | ||
164 | list_header() { | |
a26d79ca | 165 | : |
d39a206b SR |
166 | } |
167 | ||
168 | header() { | |
169 | printf "\n#####################\n# $1\n" >> ${output} | |
170 | } | |
171 | ||
172 | # process one directory (incl sub-directories) | |
173 | dir_filelist() { | |
174 | ${dep_list}header "$1" | |
175 | ||
176 | srcdir=$(echo "$1" | sed -e 's://*:/:g') | |
f55f2328 | 177 | dirlist=$(find "${srcdir}" -printf "%p %m %U %G\n" | LANG=C sort) |
d39a206b SR |
178 | |
179 | # If $dirlist is only one line, then the directory is empty | |
180 | if [ "$(echo "${dirlist}" | wc -l)" -gt 1 ]; then | |
181 | ${dep_list}print_mtime "$1" | |
182 | ||
183 | echo "${dirlist}" | \ | |
184 | while read x; do | |
185 | ${dep_list}parse ${x} | |
186 | done | |
187 | fi | |
1da177e4 LT |
188 | } |
189 | ||
d39a206b SR |
190 | # if only one file is specified and it is .cpio file then use it direct as fs |
191 | # if a directory is specified then add all files in given direcotry to fs | |
192 | # if a regular file is specified assume it is in gen_initramfs format | |
193 | input_file() { | |
194 | source="$1" | |
195 | if [ -f "$1" ]; then | |
196 | ${dep_list}header "$1" | |
1fe7d2bb | 197 | is_cpio="$(echo "$1" | sed 's/^.*\.cpio\(\..*\)\{0,1\}/cpio/')" |
153f0114 | 198 | if [ $2 -eq 0 -a ${is_cpio} = "cpio" ]; then |
d39a206b | 199 | cpio_file=$1 |
c299ec2d | 200 | echo "$1" | grep -q '^.*\.cpio\..*' && is_cpio_compressed="compressed" |
d39a206b SR |
201 | [ ! -z ${dep_list} ] && echo "$1" |
202 | return 0 | |
203 | fi | |
204 | if [ -z ${dep_list} ]; then | |
205 | print_mtime "$1" >> ${output} | |
206 | cat "$1" >> ${output} | |
1da177e4 | 207 | else |
b8341936 | 208 | echo "$1 \\" |
46ed981d | 209 | cat "$1" | while read type dir file perm ; do |
153f0114 | 210 | if [ "$type" = "file" ]; then |
46ed981d SR |
211 | echo "$file \\"; |
212 | fi | |
213 | done | |
1da177e4 | 214 | fi |
d39a206b SR |
215 | elif [ -d "$1" ]; then |
216 | dir_filelist "$1" | |
1da177e4 | 217 | else |
d39a206b | 218 | echo " ${prog}: Cannot open '$1'" >&2 |
1da177e4 LT |
219 | exit 1 |
220 | fi | |
221 | } | |
222 | ||
d39a206b | 223 | prog=$0 |
1da177e4 LT |
224 | root_uid=0 |
225 | root_gid=0 | |
d39a206b SR |
226 | dep_list= |
227 | cpio_file= | |
228 | cpio_list= | |
229 | output="/dev/stdout" | |
230 | output_file="" | |
c299ec2d | 231 | is_cpio_compressed= |
6ae9ecb8 | 232 | compr="gzip -n -9 -f" |
1da177e4 | 233 | |
d39a206b SR |
234 | arg="$1" |
235 | case "$arg" in | |
236 | "-l") # files included in initramfs - used by kbuild | |
237 | dep_list="list_" | |
b8341936 | 238 | echo "deps_initramfs := $0 \\" |
d39a206b SR |
239 | shift |
240 | ;; | |
a26ee60f | 241 | "-o") # generate compressed cpio image named $1 |
d39a206b SR |
242 | shift |
243 | output_file="$1" | |
244 | cpio_list="$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX)" | |
245 | output=${cpio_list} | |
9ba4bcb6 | 246 | echo "$output_file" | grep -q "\.gz$" \ |
247 | && [ -x "`which gzip 2> /dev/null`" ] \ | |
248 | && compr="gzip -n -9 -f" | |
249 | echo "$output_file" | grep -q "\.bz2$" \ | |
250 | && [ -x "`which bzip2 2> /dev/null`" ] \ | |
251 | && compr="bzip2 -9 -f" | |
252 | echo "$output_file" | grep -q "\.lzma$" \ | |
253 | && [ -x "`which lzma 2> /dev/null`" ] \ | |
254 | && compr="lzma -9 -f" | |
255 | echo "$output_file" | grep -q "\.xz$" \ | |
256 | && [ -x "`which xz 2> /dev/null`" ] \ | |
257 | && compr="xz --check=crc32 --lzma2=dict=1MiB" | |
258 | echo "$output_file" | grep -q "\.lzo$" \ | |
259 | && [ -x "`which lzop 2> /dev/null`" ] \ | |
260 | && compr="lzop -9 -f" | |
261 | echo "$output_file" | grep -q "\.lz4$" \ | |
262 | && [ -x "`which lz4 2> /dev/null`" ] \ | |
5ec384d4 | 263 | && compr="lz4 -l -9 -f" |
a26ee60f | 264 | echo "$output_file" | grep -q "\.cpio$" && compr="cat" |
d39a206b SR |
265 | shift |
266 | ;; | |
267 | esac | |
1da177e4 LT |
268 | while [ $# -gt 0 ]; do |
269 | arg="$1" | |
270 | shift | |
271 | case "$arg" in | |
d39a206b | 272 | "-u") # map $1 to uid=0 (root) |
1da177e4 | 273 | root_uid="$1" |
595a22ac | 274 | [ "$root_uid" = "-1" ] && root_uid=$(id -u || echo 0) |
1da177e4 LT |
275 | shift |
276 | ;; | |
d39a206b | 277 | "-g") # map $1 to gid=0 (root) |
1da177e4 | 278 | root_gid="$1" |
595a22ac | 279 | [ "$root_gid" = "-1" ] && root_gid=$(id -g || echo 0) |
1da177e4 LT |
280 | shift |
281 | ;; | |
d39a206b | 282 | "-d") # display default initramfs list |
1da177e4 | 283 | default_list="$arg" |
d39a206b | 284 | ${dep_list}default_initramfs |
1da177e4 LT |
285 | ;; |
286 | "-h") | |
287 | usage | |
288 | exit 0 | |
289 | ;; | |
290 | *) | |
291 | case "$arg" in | |
292 | "-"*) | |
d39a206b | 293 | unknown_option |
1da177e4 | 294 | ;; |
d39a206b SR |
295 | *) # input file/dir - process it |
296 | input_file "$arg" "$#" | |
1da177e4 LT |
297 | ;; |
298 | esac | |
299 | ;; | |
300 | esac | |
301 | done | |
302 | ||
a26ee60f | 303 | # If output_file is set we will generate cpio archive and compress it |
25985edc | 304 | # we are careful to delete tmp files |
d39a206b SR |
305 | if [ ! -z ${output_file} ]; then |
306 | if [ -z ${cpio_file} ]; then | |
a8b8017c MM |
307 | timestamp= |
308 | if test -n "$KBUILD_BUILD_TIMESTAMP"; then | |
309 | timestamp="$(date -d"$KBUILD_BUILD_TIMESTAMP" +%s || :)" | |
310 | if test -n "$timestamp"; then | |
311 | timestamp="-t $timestamp" | |
312 | fi | |
313 | fi | |
d39a206b | 314 | cpio_tfile="$(mktemp ${TMPDIR:-/tmp}/cpiofile.XXXXXX)" |
a8b8017c | 315 | usr/gen_init_cpio $timestamp ${cpio_list} > ${cpio_tfile} |
d39a206b SR |
316 | else |
317 | cpio_tfile=${cpio_file} | |
318 | fi | |
319 | rm ${cpio_list} | |
c299ec2d AL |
320 | if [ "${is_cpio_compressed}" = "compressed" ]; then |
321 | cat ${cpio_tfile} > ${output_file} | |
322 | else | |
ab59d3b7 AK |
323 | (cat ${cpio_tfile} | ${compr} - > ${output_file}) \ |
324 | || (rm -f ${output_file} ; false) | |
c299ec2d | 325 | fi |
d39a206b SR |
326 | [ -z ${cpio_file} ] && rm ${cpio_tfile} |
327 | fi | |
1da177e4 | 328 | exit 0 |