update checkpatch.pl to version 0.16
[linux-2.6.git] / scripts / gen_initramfs_list.sh
index 6d41116..684fb9c 100644 (file)
@@ -1,22 +1,61 @@
 #!/bin/bash
 # Copyright (C) Martin Schlemmer <azarah@nosferatu.za.org>
-# Released under the terms of the GNU GPL
-#
-# 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.
+# Copyright (C) 2006 Sam Ravnborg <sam@ravnborg.org>
 #
-# The output is suitable for gen_init_cpio built from usr/gen_init_cpio.c.
+# 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.  "squash" forces all files to uid 0.
+       -g <gid>       Group ID to map to group ID 0 (root).
+                      <gid> is only meaningful if <cpio_source> is a
+                      directory.  "squash" forces all files to gid 0.
+       <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
+}
+
+# awk style field access
+# $1 - field number; rest is argument string
+field() {
+       shift $1 ; echo $1
+}
+
+list_default_initramfs() {
+       # echo usr/kinit/kinit
+       :
+}
 
 default_initramfs() {
-       cat <<-EOF
+       cat <<-EOF >> ${output}
                # 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
 }
 
@@ -42,18 +81,28 @@ filetype() {
        return 0
 }
 
+list_print_mtime() {
+       :
+}
+
 print_mtime() {
-       local argv1="$1"
        local my_mtime="0"
 
-       if [ -e "${argv1}" ]; then
-               my_mtime=$(find "${argv1}" -printf "%T@\n" | sort -r | head -n 1)
+       if [ -e "$1" ]; then
+               my_mtime=$(find "$1" -printf "%T@\n" | sort -r | head -n 1)
        fi
-       
-       echo "# Last modified: ${my_mtime}"
-       echo
+
+       echo "# Last modified: ${my_mtime}" >> ${output}
+       echo "" >> ${output}
+}
+
+list_parse() {
+       echo "$1 \\"
 }
 
+# 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}//}"
@@ -64,8 +113,8 @@ parse() {
        local gid="$4"
        local ftype=$(filetype "${location}")
        # remap uid/gid to 0 if necessary
-       [ "$uid" -eq "$root_uid" ] && uid=0
-       [ "$gid" -eq "$root_gid" ] && gid=0
+       [ "$root_uid" = "squash" ] && uid=0 || [ "$uid" -eq "$root_uid" ] && uid=0
+       [ "$root_gid" = "squash" ] && gid=0 || [ "$gid" -eq "$root_gid" ] && gid=0
        local str="${mode} ${uid} ${gid}"
 
        [ "${ftype}" == "invalid" ] && return 0
@@ -76,22 +125,17 @@ parse() {
                        str="${ftype} ${name} ${location} ${str}"
                        ;;
                "nod")
-                       local dev_type=
-                       local maj=$(LC_ALL=C ls -l "${location}" | \
-                                       gawk '{sub(/,/, "", $5); print $5}')
-                       local min=$(LC_ALL=C ls -l "${location}" | \
-                                       gawk '{print $6}')
-
-                       if [ -b "${location}" ]; then
-                               dev_type="b"
-                       else
-                               dev_type="c"
-                       fi
-                       str="${ftype} ${name} ${str} ${dev_type} ${maj} ${min}"
+                       local dev=`LC_ALL=C ls -l "${location}"`
+                       local maj=`field 5 ${dev}`
+                       local min=`field 6 ${dev}`
+                       maj=${maj%,}
+
+                       [ -b "${location}" ] && dev="b" || dev="c"
+
+                       str="${ftype} ${name} ${str} ${dev} ${maj} ${min}"
                        ;;
                "slink")
-                       local target=$(LC_ALL=C ls -l "${location}" | \
-                                       gawk '{print $11}')
+                       local target=`field 11 $(LC_ALL=C ls -l "${location}")`
                        str="${ftype} ${name} ${target} ${str}"
                        ;;
                *)
@@ -99,80 +143,119 @@ parse() {
                        ;;
        esac
 
-       echo "${str}"
+       echo "${str}" >> ${output}
 
        return 0
 }
 
-usage() {
-       printf    "Usage:\n"
-       printf    "$0 [ [-u <root_uid>] [-g <root_gid>] [-d | <cpio_source>] ] . . .\n"
-       printf    "\n"
-       printf -- "-u <root_uid>  User ID to map to user ID 0 (root).\n"
-       printf    "               <root_uid> is only meaningful if <cpio_source>\n"
-       printf    "               is a directory.\n"
-       printf -- "-g <root_gid>  Group ID to map to group ID 0 (root).\n"
-       printf    "               <root_gid> is only meaningful if <cpio_source>\n"
-       printf    "               is a directory.\n"
-       printf    "<cpio_source>  File list or directory for cpio archive.\n"
-       printf    "               If <cpio_source> is not provided then a\n"
-       printf    "               a default list will be output.\n"
-       printf -- "-d             Output the default cpio list.  If no <cpio_source>\n"
-       printf    "               is given then the default cpio list will be output.\n"
-       printf    "\n"
-       printf    "All options may be repeated and are interpreted sequentially\n"
-       printf    "and immediately.  -u and -g states are preserved across\n"
-       printf    "<cpio_source> options so an explicit \"-u 0 -g 0\" is required\n"
-       printf    "to reset the root/group mapping.\n"
+unknown_option() {
+       printf "ERROR: unknown option \"$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
 }
 
-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
+list_header() {
+       :
+}
+
+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")
+
+       # 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
+}
+
+# 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
+                       echo "$1" | grep -q '^.*\.cpio\..*' && is_cpio_compressed="compressed"
+                       [ ! -z ${dep_list} ] && echo "$1"
+                       return 0
+               fi
+               if [ -z ${dep_list} ]; then
+                       print_mtime "$1" >> ${output}
+                       cat "$1"         >> ${output}
                else
-                       # Failsafe in case directory is empty
-                       default_initramfs
+                       cat "$1" | while read type dir file perm ; do
+                               if [ "$type" == "file" ]; then
+                                       echo "$file \\";
+                               fi
+                       done
                fi
+       elif [ -d "$1" ]; then
+               dir_filelist "$1"
        else
-               echo "  $0: Cannot open '$cpio_source'" >&2
+               echo "  ${prog}: Cannot open '$1'" >&2
                exit 1
        fi
 }
 
-
+prog=$0
 root_uid=0
 root_gid=0
+dep_list=
+cpio_file=
+cpio_list=
+output="/dev/stdout"
+output_file=""
+is_cpio_compressed=
 
+arg="$1"
+case "$arg" in
+       "-l")   # files included in initramfs - used by kbuild
+               dep_list="list_"
+               echo "deps_initramfs := \\"
+               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")
+               "-u")   # map $1 to uid=0 (root)
                        root_uid="$1"
                        shift
                        ;;
-               "-g")
+               "-g")   # map $1 to gid=0 (root)
                        root_gid="$1"
                        shift
                        ;;
-               "-d")
+               "-d")   # display default initramfs list
                        default_list="$arg"
-                       default_initramfs
+                       ${dep_list}default_initramfs
                        ;;
                "-h")
                        usage
@@ -181,23 +264,31 @@ while [ $# -gt 0 ]; do
                *)
                        case "$arg" in
                                "-"*)
-                                       printf "ERROR: unknown option \"$arg\"\n" >&2
-                                       printf "If the filename validly begins with '-', then it must be prefixed\n" >&2
-                                       printf "by './' so that it won't be interpreted as an option." >&2
-                                       printf "\n" >&2
-                                       usage >&2
-                                       exit 1
+                                       unknown_option
                                        ;;
-                               *)
-                                       cpio_source="$arg"
-                                       build_list
+                               *)      # input file/dir - process it
+                                       input_file "$arg" "$#"
                                        ;;
                        esac
                        ;;
        esac
 done
 
-# spit out the default cpio list if a source hasn't been specified
-[ -z "$cpio_source" -a -z "$default_list" ] && default_initramfs
-
+# 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 ${cpio_list}
+       if [ "${is_cpio_compressed}" = "compressed" ]; then
+               cat ${cpio_tfile} > ${output_file}
+       else
+               cat ${cpio_tfile} | gzip -f -9 - > ${output_file}
+       fi
+       [ -z ${cpio_file} ] && rm ${cpio_tfile}
+fi
 exit 0