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