#!/bin/bash
# Copyright (C) Martin Schlemmer <azarah@nosferatu.za.org>
-# Copyright (c) 2006 Sam Ravnborg <sam@ravnborg.org>
-#
# Released under the terms of the GNU GPL
#
-# Generate a cpio packed initramfs. It uses gen_init_cpio to generate
-# the cpio archive, and gzip to pack it.
-# The script may also be used to generate the inputfile used for gen_init_cpio
-# This script assumes that gen_init_cpio is located in usr/ directory
-
-# error out on errors
-set -e
-
-usage() {
-cat << EOF
-Usage:
-$0 [-o <file>] [-u <uid>] [-g <gid>] {-d | <cpio_source>} ...
- -o <file> Create gzipped initramfs file named <file> using
- gen_init_cpio and gzip
- -u <uid> User ID to map to user ID 0 (root).
- <uid> is only meaningful if <cpio_source>
- is a directory.
- -g <gid> Group ID to map to group ID 0 (root).
- <gid> is only meaningful if <cpio_source>
- is a directory.
- <cpio_source> File list or directory for cpio archive.
- If <cpio_source> is a .cpio file it will be used
- as direct input to initramfs.
- -d Output the default cpio list.
-
-All options except -o and -l may be repeated and are interpreted
-sequentially and immediately. -u and -g states are preserved across
-<cpio_source> options so an explicit "-u 0 -g 0" is required
-to reset the root/group mapping.
-EOF
-}
-
-list_default_initramfs() {
- # echo usr/kinit/kinit
- :
-}
+# Generate a newline separated list of entries from the file/directory
+# supplied as an argument.
+#
+# If a file/directory is not supplied then generate a small dummy file.
+#
+# The output is suitable for gen_init_cpio built from usr/gen_init_cpio.c.
+#
default_initramfs() {
- cat <<-EOF >> ${output}
+ cat <<-EOF
# This is a very simple, default initramfs
dir /dev 0755 0 0
nod /dev/console 0600 0 0 c 5 1
dir /root 0700 0 0
- # file /kinit usr/kinit/kinit 0755 0 0
- # slink /init kinit 0755 0 0
EOF
}
return 0
}
-list_print_mtime() {
- :
-}
-
print_mtime() {
+ local argv1="$1"
local my_mtime="0"
- if [ -e "$1" ]; then
- my_mtime=$(find "$1" -printf "%T@\n" | sort -r | head -n 1)
+ if [ -e "${argv1}" ]; then
+ my_mtime=$(find "${argv1}" -printf "%T@\n" | sort -r | head -n 1)
fi
-
- echo "# Last modified: ${my_mtime}" >> ${output}
- echo "" >> ${output}
-}
-
-list_parse() {
- echo "$1 \\"
+
+ echo "# Last modified: ${my_mtime}"
+ echo
}
-# for each file print a line in following format
-# <filetype> <name> <path to file> <octal mode> <uid> <gid>
-# for links, devices etc the format differs. See gen_init_cpio for details
parse() {
local location="$1"
local name="${location/${srcdir}//}"
;;
esac
- echo "${str}" >> ${output}
+ echo "${str}"
return 0
}
-unknown_option() {
- printf "ERROR: unknown option \"$arg\"\n" >&2
- printf "If the filename validly begins with '-', " >&2
- printf "then it must be prefixed\n" >&2
- printf "by './' so that it won't be interpreted as an option." >&2
- printf "\n" >&2
- usage >&2
- exit 1
-}
-
-list_header() {
- echo "deps_initramfs := \\"
-}
-
-header() {
- printf "\n#####################\n# $1\n" >> ${output}
-}
-
-# process one directory (incl sub-directories)
-dir_filelist() {
- ${dep_list}header "$1"
-
- srcdir=$(echo "$1" | sed -e 's://*:/:g')
- dirlist=$(find "${srcdir}" -printf "%p %m %U %G\n" 2>/dev/null)
-
- # If $dirlist is only one line, then the directory is empty
- if [ "$(echo "${dirlist}" | wc -l)" -gt 1 ]; then
- ${dep_list}print_mtime "$1"
-
- echo "${dirlist}" | \
- while read x; do
- ${dep_list}parse ${x}
- done
- fi
+usage() {
+ printf "Usage:\n"
+ printf "$0 [ [-u <root_uid>] [-g <root_gid>] [-d | <cpio_source>] ] . . .\n"
+ printf "\n"
+ printf -- "-u <root_uid> User ID to map to user ID 0 (root).\n"
+ printf " <root_uid> is only meaningful if <cpio_source>\n"
+ printf " is a directory.\n"
+ printf -- "-g <root_gid> Group ID to map to group ID 0 (root).\n"
+ printf " <root_gid> is only meaningful if <cpio_source>\n"
+ printf " is a directory.\n"
+ printf "<cpio_source> File list or directory for cpio archive.\n"
+ printf " If <cpio_source> is not provided then a\n"
+ printf " a default list will be output.\n"
+ printf -- "-d Output the default cpio list. If no <cpio_source>\n"
+ printf " is given then the default cpio list will be output.\n"
+ printf "\n"
+ printf "All options may be repeated and are interpreted sequentially\n"
+ printf "and immediately. -u and -g states are preserved across\n"
+ printf "<cpio_source> options so an explicit \"-u 0 -g 0\" is required\n"
+ printf "to reset the root/group mapping.\n"
}
-# if only one file is specified and it is .cpio file then use it direct as fs
-# if a directory is specified then add all files in given direcotry to fs
-# if a regular file is specified assume it is in gen_initramfs format
-input_file() {
- source="$1"
- if [ -f "$1" ]; then
- ${dep_list}header "$1"
- is_cpio="$(echo "$1" | sed 's/^.*\.cpio/cpio/')"
- if [ $2 -eq 0 -a ${is_cpio} == "cpio" ]; then
- cpio_file=$1
- [ ! -z ${dep_list} ] && echo "$1"
- return 0
- fi
- if [ -z ${dep_list} ]; then
- print_mtime "$1" >> ${output}
- cat "$1" >> ${output}
- else
- cat "$1" | while read type dir file perm ; do
- if [ "$type" == "file" ]; then
- echo "$file \\";
- fi
+build_list() {
+ printf "\n#####################\n# $cpio_source\n"
+
+ if [ -f "$cpio_source" ]; then
+ print_mtime "$cpio_source"
+ cat "$cpio_source"
+ elif [ -d "$cpio_source" ]; then
+ srcdir=$(echo "$cpio_source" | sed -e 's://*:/:g')
+ dirlist=$(find "${srcdir}" -printf "%p %m %U %G\n" 2>/dev/null)
+
+ # If $dirlist is only one line, then the directory is empty
+ if [ "$(echo "${dirlist}" | wc -l)" -gt 1 ]; then
+ print_mtime "$cpio_source"
+
+ echo "${dirlist}" | \
+ while read x; do
+ parse ${x}
done
+ else
+ # Failsafe in case directory is empty
+ default_initramfs
fi
- elif [ -d "$1" ]; then
- dir_filelist "$1"
else
- echo " ${prog}: Cannot open '$1'" >&2
+ echo " $0: Cannot open '$cpio_source'" >&2
exit 1
fi
}
-prog=$0
+
root_uid=0
root_gid=0
-dep_list=
-cpio_file=
-cpio_list=
-output="/dev/stdout"
-output_file=""
-arg="$1"
-case "$arg" in
- "-l") # files included in initramfs - used by kbuild
- dep_list="list_"
- shift
- ;;
- "-o") # generate gzipped cpio image named $1
- shift
- output_file="$1"
- cpio_list="$(mktemp ${TMPDIR:-/tmp}/cpiolist.XXXXXX)"
- output=${cpio_list}
- shift
- ;;
-esac
while [ $# -gt 0 ]; do
arg="$1"
shift
case "$arg" in
- "-u") # map $1 to uid=0 (root)
+ "-u")
root_uid="$1"
shift
;;
- "-g") # map $1 to gid=0 (root)
+ "-g")
root_gid="$1"
shift
;;
- "-d") # display default initramfs list
+ "-d")
default_list="$arg"
- ${dep_list}default_initramfs
+ default_initramfs
;;
"-h")
usage
*)
case "$arg" in
"-"*)
- unknown_option
+ printf "ERROR: unknown option \"$arg\"\n" >&2
+ printf "If the filename validly begins with '-', then it must be prefixed\n" >&2
+ printf "by './' so that it won't be interpreted as an option." >&2
+ printf "\n" >&2
+ usage >&2
+ exit 1
;;
- *) # input file/dir - process it
- input_file "$arg" "$#"
+ *)
+ cpio_source="$arg"
+ build_list
;;
esac
;;
esac
done
-# If output_file is set we will generate cpio archive and gzip it
-# we are carefull to delete tmp files
-if [ ! -z ${output_file} ]; then
- if [ -z ${cpio_file} ]; then
- cpio_tfile="$(mktemp ${TMPDIR:-/tmp}/cpiofile.XXXXXX)"
- usr/gen_init_cpio ${cpio_list} > ${cpio_tfile}
- else
- cpio_tfile=${cpio_file}
- fi
- rm ${cpio_list}
- cat ${cpio_tfile} | gzip -f -9 - > ${output_file}
- [ -z ${cpio_file} ] && rm ${cpio_tfile}
-fi
+# spit out the default cpio list if a source hasn't been specified
+[ -z "$cpio_source" -a -z "$default_list" ] && default_initramfs
+
exit 0
git://git.onelab.eu / linux-2.6.git / blobdiff