Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | #!/bin/bash |
| 2 | # Copyright (C) Martin Schlemmer <azarah@nosferatu.za.org> |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 3 | # Copyright (c) 2006 Sam Ravnborg <sam@ravnborg.org> |
| 4 | # |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | # Released under the terms of the GNU GPL |
| 6 | # |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 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 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
| 44 | default_initramfs() { |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 45 | cat <<-EOF >> ${output} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 51 | # file /kinit usr/kinit/kinit 0755 0 0 |
| 52 | # slink /init kinit 0755 0 0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 78 | list_print_mtime() { |
| 79 | : |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | } |
| 81 | |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 82 | print_mtime() { |
| 83 | local my_mtime="0" |
| 84 | |
| 85 | if [ -e "$1" ]; then |
| 86 | my_mtime=$(find "$1" -printf "%T@\n" | sort -r | head -n 1) |
| 87 | fi |
| 88 | |
| 89 | echo "# Last modified: ${my_mtime}" >> ${output} |
| 90 | echo "" >> ${output} |
| 91 | } |
| 92 | |
| 93 | list_parse() { |
| 94 | echo "$1 \\" |
| 95 | } |
| 96 | |
| 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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} ${str}" |
| 142 | ;; |
| 143 | esac |
| 144 | |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 145 | echo "${str}" >> ${output} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | |
| 147 | return 0 |
| 148 | } |
| 149 | |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 150 | unknown_option() { |
| 151 | printf "ERROR: unknown option \"$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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | } |
| 159 | |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 160 | list_header() { |
| 161 | echo "deps_initramfs := \\" |
| 162 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 164 | header() { |
| 165 | printf "\n#####################\n# $1\n" >> ${output} |
| 166 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 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 |
| 184 | } |
| 185 | |
| 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | fi |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 199 | if [ -z ${dep_list} ]; then |
| 200 | print_mtime "$1" >> ${output} |
| 201 | cat "$1" >> ${output} |
| 202 | else |
| 203 | grep ^file "$1" | cut -d ' ' -f 3 |
| 204 | fi |
| 205 | elif [ -d "$1" ]; then |
| 206 | dir_filelist "$1" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | else |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 208 | echo " ${prog}: Cannot open '$1'" >&2 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | exit 1 |
| 210 | fi |
| 211 | } |
| 212 | |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 213 | prog=$0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | root_uid=0 |
| 215 | root_gid=0 |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 216 | dep_list= |
| 217 | cpio_file= |
| 218 | cpio_list= |
| 219 | output="/dev/stdout" |
| 220 | output_file="" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | while [ $# -gt 0 ]; do |
| 237 | arg="$1" |
| 238 | shift |
| 239 | case "$arg" in |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 240 | "-u") # map $1 to uid=0 (root) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | root_uid="$1" |
| 242 | shift |
| 243 | ;; |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 244 | "-g") # map $1 to gid=0 (root) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | root_gid="$1" |
| 246 | shift |
| 247 | ;; |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 248 | "-d") # display default initramfs list |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | default_list="$arg" |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 250 | ${dep_list}default_initramfs |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | ;; |
| 252 | "-h") |
| 253 | usage |
| 254 | exit 0 |
| 255 | ;; |
| 256 | *) |
| 257 | case "$arg" in |
| 258 | "-"*) |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 259 | unknown_option |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | ;; |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 261 | *) # input file/dir - process it |
| 262 | input_file "$arg" "$#" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | ;; |
| 264 | esac |
| 265 | ;; |
| 266 | esac |
| 267 | done |
| 268 | |
Sam Ravnborg | d39a206 | 2006-04-11 13:24:32 +0200 | [diff] [blame^] | 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 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | exit 0 |