1 #!/bin/sh 1 #!/bin/sh
2 # Copyright (C) Martin Schlemmer <azarah@nosfer 2 # Copyright (C) Martin Schlemmer <azarah@nosferatu.za.org>
3 # Copyright (C) 2006 Sam Ravnborg <sam@ravnborg 3 # Copyright (C) 2006 Sam Ravnborg <sam@ravnborg.org>
4 # 4 #
5 # Released under the terms of the GNU GPL 5 # Released under the terms of the GNU GPL
6 # 6 #
7 # Generate a cpio packed initramfs. It uses ge 7 # Generate a cpio packed initramfs. It uses gen_init_cpio to generate
8 # the cpio archive. 8 # the cpio archive.
9 # This script assumes that gen_init_cpio is lo 9 # This script assumes that gen_init_cpio is located in usr/ directory
10 10
11 # error out on errors 11 # error out on errors
12 set -e 12 set -e
13 13
14 usage() { 14 usage() {
15 cat << EOF 15 cat << EOF
16 Usage: 16 Usage:
17 $0 [-o <file>] [-l <dep_list>] [-u <uid>] [-g 17 $0 [-o <file>] [-l <dep_list>] [-u <uid>] [-g <gid>] {-d | <cpio_source>} ...
18 -o <file> Create initramfs file n 18 -o <file> Create initramfs file named <file> by using gen_init_cpio
19 -l <dep_list> Create dependency list 19 -l <dep_list> Create dependency list named <dep_list>
20 -u <uid> User ID to map to user 20 -u <uid> User ID to map to user ID 0 (root).
21 <uid> is only meaningfu 21 <uid> is only meaningful if <cpio_source> is a
22 directory. "squash" fo 22 directory. "squash" forces all files to uid 0.
23 -g <gid> Group ID to map to grou 23 -g <gid> Group ID to map to group ID 0 (root).
24 <gid> is only meaningfu 24 <gid> is only meaningful if <cpio_source> is a
25 directory. "squash" fo 25 directory. "squash" forces all files to gid 0.
26 -d <date> Use date for all file m <<
27 <cpio_source> File list or directory 26 <cpio_source> File list or directory for cpio archive.
28 If <cpio_source> is a . 27 If <cpio_source> is a .cpio file it will be used
29 as direct input to init 28 as direct input to initramfs.
30 29
31 All options except -o and -l may be repeated a 30 All options except -o and -l may be repeated and are interpreted
32 sequentially and immediately. -u and -g state 31 sequentially and immediately. -u and -g states are preserved across
33 <cpio_source> options so an explicit "-u 0 -g 32 <cpio_source> options so an explicit "-u 0 -g 0" is required
34 to reset the root/group mapping. 33 to reset the root/group mapping.
35 EOF 34 EOF
36 } 35 }
37 36
38 # awk style field access 37 # awk style field access
39 # $1 - field number; rest is argument string 38 # $1 - field number; rest is argument string
40 field() { 39 field() {
41 shift $1 ; echo $1 40 shift $1 ; echo $1
42 } 41 }
43 42
44 filetype() { 43 filetype() {
45 local argv1="$1" 44 local argv1="$1"
46 45
47 # symlink test must come before file t 46 # symlink test must come before file test
48 if [ -L "${argv1}" ]; then 47 if [ -L "${argv1}" ]; then
49 echo "slink" 48 echo "slink"
50 elif [ -f "${argv1}" ]; then 49 elif [ -f "${argv1}" ]; then
51 echo "file" 50 echo "file"
52 elif [ -d "${argv1}" ]; then 51 elif [ -d "${argv1}" ]; then
53 echo "dir" 52 echo "dir"
54 elif [ -b "${argv1}" -o -c "${argv1}" 53 elif [ -b "${argv1}" -o -c "${argv1}" ]; then
55 echo "nod" 54 echo "nod"
56 elif [ -p "${argv1}" ]; then 55 elif [ -p "${argv1}" ]; then
57 echo "pipe" 56 echo "pipe"
58 elif [ -S "${argv1}" ]; then 57 elif [ -S "${argv1}" ]; then
59 echo "sock" 58 echo "sock"
60 else 59 else
61 echo "invalid" 60 echo "invalid"
62 fi 61 fi
63 return 0 62 return 0
64 } 63 }
65 64
66 print_mtime() { 65 print_mtime() {
67 local my_mtime="0" 66 local my_mtime="0"
68 67
69 if [ -e "$1" ]; then 68 if [ -e "$1" ]; then
70 my_mtime=$(find "$1" -printf " 69 my_mtime=$(find "$1" -printf "%T@\n" | sort -r | head -n 1)
71 fi 70 fi
72 71
73 echo "# Last modified: ${my_mtime}" >> 72 echo "# Last modified: ${my_mtime}" >> $cpio_list
74 echo "" >> $cpio_list 73 echo "" >> $cpio_list
75 } 74 }
76 75
77 list_parse() { 76 list_parse() {
78 if [ -z "$dep_list" -o -L "$1" ]; then 77 if [ -z "$dep_list" -o -L "$1" ]; then
79 return 78 return
80 fi 79 fi
81 echo "$1" | sed 's/:/\\:/g; s/$/ \\/' 80 echo "$1" | sed 's/:/\\:/g; s/$/ \\/' >> $dep_list
82 } 81 }
83 82
84 # for each file print a line in following form 83 # for each file print a line in following format
85 # <filetype> <name> <path to file> <octal mode 84 # <filetype> <name> <path to file> <octal mode> <uid> <gid>
86 # for links, devices etc the format differs. S 85 # for links, devices etc the format differs. See gen_init_cpio for details
87 parse() { 86 parse() {
88 local location="$1" 87 local location="$1"
89 local name="/${location#${srcdir}}" 88 local name="/${location#${srcdir}}"
90 # change '//' into '/' 89 # change '//' into '/'
91 name=$(echo "$name" | sed -e 's://*:/: 90 name=$(echo "$name" | sed -e 's://*:/:g')
92 local mode="$2" 91 local mode="$2"
93 local uid="$3" 92 local uid="$3"
94 local gid="$4" 93 local gid="$4"
95 local ftype=$(filetype "${location}") 94 local ftype=$(filetype "${location}")
96 # remap uid/gid to 0 if necessary 95 # remap uid/gid to 0 if necessary
97 [ "$root_uid" = "squash" ] && uid=0 || 96 [ "$root_uid" = "squash" ] && uid=0 || [ "$uid" -eq "$root_uid" ] && uid=0
98 [ "$root_gid" = "squash" ] && gid=0 || 97 [ "$root_gid" = "squash" ] && gid=0 || [ "$gid" -eq "$root_gid" ] && gid=0
99 local str="${mode} ${uid} ${gid}" 98 local str="${mode} ${uid} ${gid}"
100 99
101 [ "${ftype}" = "invalid" ] && return 0 100 [ "${ftype}" = "invalid" ] && return 0
102 [ "${location}" = "${srcdir}" ] && ret 101 [ "${location}" = "${srcdir}" ] && return 0
103 102
104 case "${ftype}" in 103 case "${ftype}" in
105 "file") 104 "file")
106 str="${ftype} ${name} 105 str="${ftype} ${name} ${location} ${str}"
107 ;; 106 ;;
108 "nod") 107 "nod")
109 local dev="`LC_ALL=C l 108 local dev="`LC_ALL=C ls -l "${location}"`"
110 local maj=`field 5 ${d 109 local maj=`field 5 ${dev}`
111 local min=`field 6 ${d 110 local min=`field 6 ${dev}`
112 maj=${maj%,} 111 maj=${maj%,}
113 112
114 [ -b "${location}" ] & 113 [ -b "${location}" ] && dev="b" || dev="c"
115 114
116 str="${ftype} ${name} 115 str="${ftype} ${name} ${str} ${dev} ${maj} ${min}"
117 ;; 116 ;;
118 "slink") 117 "slink")
119 local target=`readlink 118 local target=`readlink "${location}"`
120 str="${ftype} ${name} 119 str="${ftype} ${name} ${target} ${str}"
121 ;; 120 ;;
122 *) 121 *)
123 str="${ftype} ${name} 122 str="${ftype} ${name} ${str}"
124 ;; 123 ;;
125 esac 124 esac
126 125
127 echo "${str}" >> $cpio_list 126 echo "${str}" >> $cpio_list
128 127
129 return 0 128 return 0
130 } 129 }
131 130
132 unknown_option() { 131 unknown_option() {
133 printf "ERROR: unknown option \"$arg\" 132 printf "ERROR: unknown option \"$arg\"\n" >&2
134 printf "If the filename validly begins 133 printf "If the filename validly begins with '-', " >&2
135 printf "then it must be prefixed\n" >& 134 printf "then it must be prefixed\n" >&2
136 printf "by './' so that it won't be in 135 printf "by './' so that it won't be interpreted as an option." >&2
137 printf "\n" >&2 136 printf "\n" >&2
138 usage >&2 137 usage >&2
139 exit 1 138 exit 1
140 } 139 }
141 140
142 header() { 141 header() {
143 printf "\n#####################\n# $1\ 142 printf "\n#####################\n# $1\n" >> $cpio_list
144 } 143 }
145 144
146 # process one directory (incl sub-directories) 145 # process one directory (incl sub-directories)
147 dir_filelist() { 146 dir_filelist() {
148 header "$1" 147 header "$1"
149 148
150 srcdir=$(echo "$1" | sed -e 's://*:/:g 149 srcdir=$(echo "$1" | sed -e 's://*:/:g')
151 dirlist=$(find "${srcdir}" -printf "%p !! 150 dirlist=$(find "${srcdir}" -printf "%p %m %U %G\n" | LANG=C sort)
152 151
153 # If $dirlist is only one line, then t 152 # If $dirlist is only one line, then the directory is empty
154 if [ "$(echo "${dirlist}" | wc -l)" - 153 if [ "$(echo "${dirlist}" | wc -l)" -gt 1 ]; then
155 print_mtime "$1" 154 print_mtime "$1"
156 155
157 echo "${dirlist}" | \ 156 echo "${dirlist}" | \
158 while read x; do 157 while read x; do
159 list_parse $x 158 list_parse $x
160 parse $x 159 parse $x
161 done 160 done
162 fi 161 fi
163 } 162 }
164 163
165 input_file() { 164 input_file() {
166 source="$1" 165 source="$1"
167 if [ -f "$1" ]; then 166 if [ -f "$1" ]; then
168 # If a regular file is specifi 167 # If a regular file is specified, assume it is in
169 # gen_init_cpio format 168 # gen_init_cpio format
170 header "$1" 169 header "$1"
171 print_mtime "$1" >> $cpio_list 170 print_mtime "$1" >> $cpio_list
172 cat "$1" >> $cpio_list 171 cat "$1" >> $cpio_list
173 if [ -n "$dep_list" ]; then 172 if [ -n "$dep_list" ]; then
174 echo "$1 \\" >> $dep_ 173 echo "$1 \\" >> $dep_list
175 cat "$1" | while read 174 cat "$1" | while read type dir file perm ; do
176 if [ "$type" = 175 if [ "$type" = "file" ]; then
177 echo " 176 echo "$file \\" >> $dep_list
178 fi 177 fi
179 done 178 done
180 fi 179 fi
181 elif [ -d "$1" ]; then 180 elif [ -d "$1" ]; then
182 # If a directory is specified 181 # If a directory is specified then add all files in it to fs
183 dir_filelist "$1" 182 dir_filelist "$1"
184 else 183 else
185 echo " ${prog}: Cannot open ' 184 echo " ${prog}: Cannot open '$1'" >&2
186 exit 1 185 exit 1
187 fi 186 fi
188 } 187 }
189 188
190 prog=$0 189 prog=$0
191 root_uid=0 190 root_uid=0
192 root_gid=0 191 root_gid=0
193 dep_list= 192 dep_list=
194 timestamp= <<
195 cpio_list=$(mktemp ${TMPDIR:-/tmp}/cpiolist.XX 193 cpio_list=$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX)
196 output="/dev/stdout" 194 output="/dev/stdout"
197 195
198 trap "rm -f $cpio_list" EXIT 196 trap "rm -f $cpio_list" EXIT
199 197
200 while [ $# -gt 0 ]; do 198 while [ $# -gt 0 ]; do
201 arg="$1" 199 arg="$1"
202 shift 200 shift
203 case "$arg" in 201 case "$arg" in
204 "-l") # files included in in 202 "-l") # files included in initramfs - used by kbuild
205 dep_list="$1" 203 dep_list="$1"
206 echo "deps_initramfs : 204 echo "deps_initramfs := \\" > $dep_list
207 shift 205 shift
208 ;; 206 ;;
209 "-o") # generate cpio image 207 "-o") # generate cpio image named $1
210 output="$1" 208 output="$1"
211 shift 209 shift
212 ;; 210 ;;
213 "-u") # map $1 to uid=0 (roo 211 "-u") # map $1 to uid=0 (root)
214 root_uid="$1" 212 root_uid="$1"
215 [ "$root_uid" = "-1" ] 213 [ "$root_uid" = "-1" ] && root_uid=$(id -u || echo 0)
216 shift 214 shift
217 ;; 215 ;;
218 "-g") # map $1 to gid=0 (roo 216 "-g") # map $1 to gid=0 (root)
219 root_gid="$1" 217 root_gid="$1"
220 [ "$root_gid" = "-1" ] 218 [ "$root_gid" = "-1" ] && root_gid=$(id -g || echo 0)
221 shift 219 shift
222 ;; 220 ;;
223 "-d") # date for file mtimes <<
224 timestamp="$(date -d"$ <<
225 if test -n "$timestamp <<
226 timestamp="-t <<
227 fi <<
228 shift <<
229 ;; <<
230 "-h") 221 "-h")
231 usage 222 usage
232 exit 0 223 exit 0
233 ;; 224 ;;
234 *) 225 *)
235 case "$arg" in 226 case "$arg" in
236 "-"*) 227 "-"*)
237 unknow 228 unknown_option
238 ;; 229 ;;
239 *) # inpu 230 *) # input file/dir - process it
240 input_ 231 input_file "$arg"
241 ;; 232 ;;
242 esac 233 esac
243 ;; 234 ;;
244 esac 235 esac
245 done 236 done
246 237
247 # If output_file is set we will generate cpio 238 # If output_file is set we will generate cpio archive
248 # we are careful to delete tmp files 239 # we are careful to delete tmp files
>> 240 timestamp=
>> 241 if test -n "$KBUILD_BUILD_TIMESTAMP"; then
>> 242 timestamp="$(date -d"$KBUILD_BUILD_TIMESTAMP" +%s || :)"
>> 243 if test -n "$timestamp"; then
>> 244 timestamp="-t $timestamp"
>> 245 fi
>> 246 fi
249 usr/gen_init_cpio $timestamp $cpio_list > $out 247 usr/gen_init_cpio $timestamp $cpio_list > $output
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