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