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|
#!/bin/bash
parseopts() {
local opt= optarg= i= shortopts=$1
local -a longopts=() unused_argv=()
shift
while [[ $1 && $1 != '--' ]]; do
longopts+=("$1")
shift
done
shift
longoptmatch() {
local o longmatch=()
for o in "${longopts[@]}"; do
if [[ ${o%:} = "$1" ]]; then
longmatch=("$o")
break
fi
[[ ${o%:} = "$1"* ]] && longmatch+=("$o")
done
case ${#longmatch[*]} in
1)
# success, override with opt and return arg req (0 == none, 1 == required)
opt=${longmatch%:}
if [[ $longmatch = *: ]]; then
return 1
else
return 0
fi ;;
0)
# fail, no match found
return 255 ;;
*)
# fail, ambiguous match
printf "%s: option '%s' is ambiguous; possibilities:%s\n" "${0##*/}" \
"--$1" "$(printf " '%s'" "${longmatch[@]%:}")"
return 254 ;;
esac
}
while (( $# )); do
case $1 in
--) # explicit end of options
shift
break
;;
-[!-]*) # short option
for (( i = 1; i < ${#1}; i++ )); do
opt=${1:i:1}
# option doesn't exist
if [[ $shortopts != *$opt* ]]; then
printf "%s: invalid option -- '%s'\n" "${0##*/}" "$opt"
OPTRET=(--)
return 1
fi
OPTRET+=("-$opt")
# option requires optarg
if [[ $shortopts = *$opt:* ]]; then
# if we're not at the end of the option chunk, the rest is the optarg
if (( i < ${#1} - 1 )); then
OPTRET+=("${1:i+1}")
break
# if we're at the end, grab the the next positional, if it exists
elif (( i == ${#1} - 1 )) && [[ $2 ]]; then
OPTRET+=("$2")
shift
break
# parse failure
else
printf "%s: option '%s' requires an argument\n" "${0##*/}" "-$opt"
OPTRET=(--)
return 1
fi
fi
done
;;
--?*=*|--?*) # long option
IFS='=' read -r opt optarg <<< "${1#--}"
longoptmatch "$opt"
case $? in
0)
if [[ $optarg ]]; then
printf "%s: option '--%s' doesn't allow an argument\n" "${0##*/}" "$opt"
OPTRET=(--)
return 1
else
OPTRET+=("--$opt")
fi
;;
1)
# --longopt=optarg
if [[ $optarg ]]; then
OPTRET+=("--$opt" "$optarg")
# --longopt optarg
elif [[ $2 ]]; then
OPTRET+=("--$opt" "$2" )
shift
else
printf "%s: option '--%s' requires an argument\n" "${0##*/}" "$opt"
OPTRET=(--)
return 1
fi
;;
254)
# ambiguous option -- error was reported for us by longoptmatch()
OPTRET=(--)
return 1
;;
255)
# parse failure
printf "%s: unrecognized option '%s'\n" "${0##*/}" "--$opt"
OPTRET=(--)
return 1
;;
esac
;;
*) # non-option arg encountered, add it as a parameter
unused_argv+=("$1")
;;
esac
shift
done
# add end-of-opt terminator and any leftover positional parameters
OPTRET+=('--' "${unused_argv[@]}" "$@")
unset longoptmatch
return 0
}
kver() {
# this is intentionally very loose. only ensure that we're
# dealing with some sort of string that starts with something
# resembling dotted decimal notation. remember that there's no
# requirement for CONFIG_LOCALVERSION to be set.
local kver re='^[[:digit:]]+(\.[[:digit:]]+)+'
# scrape the version out of the kernel image. locate the offset
# to the version string by reading 2 bytes out of image at at
# address 0x20E. this leads us to a string of, at most, 128 bytes.
# read the first word from this string as the kernel version.
local offset=$(hexdump -s 526 -n 2 -e '"%0d"' "$1")
[[ $offset = +([0-9]) ]] || return 1
read kver _ < \
<(dd if="$1" bs=1 count=127 skip=$(( offset + 0x200 )) 2>/dev/null)
[[ $kver =~ $re ]] || return 1
printf '%s' "$kver"
}
plain() {
local mesg=$1; shift
printf " $_color_bold$mesg$_color_none\n" "$@" >&1
}
quiet() {
(( _optquiet )) || plain "$@"
}
msg() {
local mesg=$1; shift
printf "$_color_green==>$_color_none $_color_bold$mesg$_color_none\n" "$@" >&1
}
msg2() {
local mesg=$1; shift
printf " $_color_blue->$_color_none $_color_bold$mesg$_color_none\n" "$@" >&1
}
warning() {
local mesg=$1; shift
printf "$_color_yellow==> WARNING:$_color_none $_color_bold$mesg$_color_none\n" "$@" >&2
}
error() {
local mesg=$1; shift
printf "$_color_red==> ERROR:$_color_none $_color_bold$mesg$_color_none\n" "$@" >&2
return 1
}
die() {
error "$@"
cleanup 1
}
map() {
local r=0
for _ in "${@:2}"; do
"$1" "$_" || (( $# > 255 ? r=1 : ++r ))
done
return $r
}
arrayize_config() {
set -f
[[ ${MODULES@a} != *a* ]] && MODULES=($MODULES)
[[ ${BINARIES@a} != *a* ]] && BINARIES=($BINARIES)
[[ ${FILES@a} != *a* ]] && FILES=($FILES)
[[ ${HOOKS@a} != *a* ]] && HOOKS=($HOOKS)
[[ ${COMPRESSION_OPTIONS@a} != *a* ]] && COMPRESSION_OPTIONS=($COMPRESSION_OPTIONS)
set +f
}
in_array() {
# Search for an element in an array.
# $1: needle
# ${@:2}: haystack
local item= needle=$1; shift
for item in "$@"; do
[[ $item = $needle ]] && return 0 # Found
done
return 1 # Not Found
}
index_of() {
# get the array index of an item. sets the global var _idx with
# index and returns 0 if found, otherwise returns 1.
local item=$1; shift
for (( _idx=1; _idx <= $#; _idx++ )); do
if [[ $item = ${!_idx} ]]; then
(( --_idx ))
return 0
fi
done
# not found
unset _idx
return 1
}
funcgrep() {
awk -v funcmatch="$1" '
/^[[:space:]]*[[:alnum:]_]+[[:space:]]*\([[:space:]]*\)/ {
match($1, funcmatch)
print substr($1, RSTART, RLENGTH)
}' "$2"
}
list_hookpoints() {
local funcs script
script=$(PATH=$_d_hooks type -P "$1") || return 0
mapfile -t funcs < <(funcgrep '^run_[[:alnum:]_]+' "$script")
echo
msg "This hook has runtime scripts:"
in_array run_earlyhook "${funcs[@]}" && msg2 "early hook"
in_array run_hook "${funcs[@]}" && msg2 "pre-mount hook"
in_array run_latehook "${funcs[@]}" && msg2 "post-mount hook"
in_array run_cleanuphook "${funcs[@]}" && msg2 "cleanup hook"
}
modprobe() {
command modprobe -d "$_optmoduleroot" -S "$KERNELVERSION" "$@"
}
auto_modules() {
# Perform auto detection of modules via sysfs.
local mods=
mapfile -t mods < <(find /sys/devices -name uevent \
-exec sort -u {} + | awk -F= '$1 == "MODALIAS" && !_[$0]++')
mapfile -t mods < <(modprobe -qaR "${mods[@]#MODALIAS=}")
(( ${#mods[*]} )) && printf "%s\n" "${mods[@]//-/_}"
}
all_modules() {
# Add modules to the initcpio, filtered by grep.
# $@: filter arguments to grep
# -f FILTER: ERE to filter found modules
local -i count=0
local mod= OPTIND= OPTARG= filter=()
while getopts ':f:' flag; do
case $flag in f) filter+=("$OPTARG") ;; esac
done
shift $(( OPTIND - 1 ))
while read -r -d '' mod; do
(( ++count ))
for f in "${filter[@]}"; do
[[ $mod =~ $f ]] && continue 2
done
mod=${mod##*/}
mod="${mod%.ko*}"
printf '%s\n' "${mod//-/_}"
done < <(find "$_d_kmoduledir" -name '*.ko*' -print0 2>/dev/null | grep -EZz "$@")
(( count ))
}
add_all_modules() {
# Add modules to the initcpio.
# $@: arguments to all_modules
local mod mods
mapfile -t mods < <(all_modules "$@")
map add_module "${mods[@]}"
return $(( !${#mods[*]} ))
}
add_checked_modules() {
# Add modules to the initcpio, filtered by the list of autodetected
# modules.
# $@: arguments to all_modules
local mod mods
if (( ${#_autodetect_cache[*]} )); then
mapfile -t mods < <(all_modules "$@" | grep -xFf <(printf '%s\n' "${!_autodetect_cache[@]}"))
else
mapfile -t mods < <(all_modules "$@")
fi
map add_module "${mods[@]}"
return $(( !${#mods[*]} ))
}
add_firmware() {
# add a firmware file to the image.
# $1: firmware path fragment
local fw fwpath r=1
for fw; do
for fwpath in "${_d_firmware[@]}"; do
if [[ -f $fwpath/$fw ]]; then
add_file "$fwpath/$fw" "$fwpath/$fw" 644 && r=0
break
fi
done
done
return $r
}
add_module() {
# Add a kernel module to the initcpio image. Dependencies will be
# discovered and added.
# $1: module name
local target= module= softdeps= deps= field= value= firmware=()
local ign_errors=0 found=0
[[ $KERNELVERSION == none ]] && return 0
if [[ $1 = *\? ]]; then
ign_errors=1
set -- "${1%?}"
fi
target=${1%.ko*} target=${target//-/_}
# skip expensive stuff if this module has already been added
(( _addedmodules["$target"] == 1 )) && return
while IFS=':= ' read -r -d '' field value; do
case "$field" in
filename)
found=1
module=${value##*/} module=${module%.ko*}
quiet "adding module: %s" "$module"
_modpaths["$value"]=1
_addedmodules["${module//-/_}"]=1
;;
depends)
IFS=',' read -r -a deps <<< "$value"
map add_module "${deps[@]}"
;;
firmware)
firmware+=("$value")
;;
softdep)
read -ra softdeps <<<"$value"
for module in "${softdeps[@]}"; do
[[ $module == *: ]] && continue
add_module "$module?"
done
;;
esac
done < <(modinfo -b "$_optmoduleroot" -k "$KERNELVERSION" -0 "$target" 2>/dev/null)
if (( !found )); then
(( ign_errors || _addedmodules["$target"] )) && return 0
error "module not found: \`%s'" "$target"
return 1
fi
if (( ${#firmware[*]} )); then
add_firmware "${firmware[@]}" ||
warning 'Possibly missing firmware for module: %s' "$target"
fi
# handle module quirks
case $target in
fat)
add_module "nls_cp437?"
add_module "nls_iso8859-1?"
;;
ocfs2)
add_module "configfs?"
;;
btrfs)
add_module "libcrc32c?"
;;
f2fs)
add_module "crypto-crc32?"
;;
esac
}
add_full_dir() {
# Add a directory and all its contents, recursively, to the initcpio image.
# No parsing is performed and the contents of the directory is added as is.
# $1: path to directory
# $2: glob pattern to filter file additions (optional)
# $3: path prefix that will be stripped off from the image path (optional)
local f= filter=${2:-*} strip_prefix=$3
if [[ -n $1 && -d $1 ]]; then
add_dir "$1"
for f in "$1"/*; do
if [[ -L $f ]]; then
if [[ $f = $filter ]]; then
add_symlink "${f#$strip_prefix}" "$(readlink "$f")"
fi
elif [[ -d $f ]]; then
add_full_dir "$f" "$filter" "$strip_prefix"
elif [[ -f $f ]]; then
if [[ $f = $filter ]]; then
add_file "$f" "${f#$strip_prefix}"
fi
fi
done
fi
}
add_dir() {
# add a directory (with parents) to $BUILDROOT
# $1: pathname on initcpio
# $2: mode (optional)
if [[ -z $1 || $1 != /?* ]]; then
return 1
fi
local path=$1 mode=${2:-755}
if [[ -d $BUILDROOT$1 ]]; then
# ignore dir already exists
return 0
fi
quiet "adding dir: %s" "$path"
command install -dm$mode "$BUILDROOT$path"
}
add_symlink() {
# Add a symlink to the initcpio image. There is no checking done
# to ensure that the target of the symlink exists.
# $1: pathname of symlink on image
# $2: absolute path to target of symlink (optional, can be read from $1)
local name=$1 target=$2
(( $# == 1 || $# == 2 )) || return 1
if [[ -z $target ]]; then
target=$(readlink -f "$name")
if [[ -z $target ]]; then
error 'invalid symlink: %s' "$name"
return 1
fi
fi
add_dir "${name%/*}"
if [[ -L $BUILDROOT$1 ]]; then
quiet "overwriting symlink %s -> %s" "$name" "$target"
else
quiet "adding symlink: %s -> %s" "$name" "$target"
fi
ln -sfn "$target" "$BUILDROOT$name"
}
add_file() {
# Add a plain file to the initcpio image. No parsing is performed and only
# the singular file is added.
# $1: path to file
# $2: destination on initcpio (optional, defaults to same as source)
# $3: mode
(( $# )) || return 1
# determine source and destination
local src=$1 dest=${2:-$1} mode=
if [[ ! -f $src ]]; then
error "file not found: \`%s'" "$src"
return 1
fi
mode=${3:-$(stat -c %a "$src")}
if [[ -z $mode ]]; then
error "failed to stat file: \`%s'." "$src"
return 1
fi
if [[ -e $BUILDROOT$dest ]]; then
quiet "overwriting file: %s" "$dest"
else
quiet "adding file: %s" "$dest"
fi
command install -Dm$mode "$src" "$BUILDROOT$dest"
}
add_runscript() {
# Adds a runtime script to the initcpio image. The name is derived from the
# script which calls it as the basename of the caller.
local funcs fn script hookname=${BASH_SOURCE[1]##*/}
if ! script=$(PATH=$_d_hooks type -P "$hookname"); then
error "runtime script for \`%s' not found" "$hookname"
return
fi
add_file "$script" "/hooks/$hookname" 755
mapfile -t funcs < <(funcgrep '^run_[[:alnum:]_]+' "$script")
for fn in "${funcs[@]}"; do
case $fn in
run_earlyhook)
_runhooks['early']+=" $hookname"
;;
run_hook)
_runhooks['hooks']+=" $hookname"
;;
run_latehook)
_runhooks['late']+=" $hookname"
;;
run_cleanuphook)
_runhooks['cleanup']="$hookname ${_runhooks['cleanup']}"
;;
esac
done
}
add_binary() {
# Add a binary file to the initcpio image. library dependencies will
# be discovered and added.
# $1: path to binary
# $2: destination on initcpio (optional, defaults to same as source)
local -a sodeps
local line= regex= binary= dest= mode= sodep= resolved=
if [[ ${1:0:1} != '/' ]]; then
binary=$(type -P "$1")
else
binary=$1
fi
if [[ ! -f $binary ]]; then
error "file not found: \`%s'" "$1"
return 1
fi
dest=${2:-$binary}
mode=$(stat -c %a "$binary")
# always add the binary itself
add_file "$binary" "$dest" "$mode"
# negate this so that the RETURN trap is not fired on non-binaries
! lddout=$(ldd "$binary" 2>/dev/null) && return 0
# resolve sodeps
regex='^(|.+ )(/.+) \(0x[a-fA-F0-9]+\)'
while read -r line; do
if [[ $line =~ $regex ]]; then
sodep=${BASH_REMATCH[2]}
elif [[ $line = *'not found' ]]; then
error "binary dependency \`%s' not found for \`%s'" "${line%% *}" "$1"
(( ++_builderrors ))
continue
fi
if [[ -f $sodep && ! -e $BUILDROOT$sodep ]]; then
add_file "$sodep" "$sodep" "$(stat -Lc %a "$sodep")"
fi
done <<< "$lddout"
return 0
}
parse_config() {
# parse key global variables set by the config file.
map add_module "${MODULES[@]}"
map add_binary "${BINARIES[@]}"
map add_file "${FILES[@]}"
tee "$BUILDROOT/buildconfig" < "$1" | {
. /dev/stdin
for mod in "${modules[@]%\?}"; do
mod=${mod//-/_}
# only add real modules (2 == builtin)
(( _addedmodules["$mod"] == 1 )) && add+=("$mod")
done
(( ${#add[*]} )) && printf 'MODULES="%s"\n' "${add[*]}"
printf '%s="%s"\n' \
'EARLYHOOKS' "${_runhooks['early']# }" \
'HOOKS' "${_runhooks['hooks']# }" \
'LATEHOOKS' "${_runhooks['late']# }" \
'CLEANUPHOOKS' "${_runhooks['cleanup']% }"
} >"$BUILDROOT/config"
}
initialize_buildroot() {
# creates a temporary directory for the buildroot and initialize it with a
# basic set of necessary directories and symlinks
local workdir= kernver=$1 arch=$(uname -m) buildroot
if ! workdir=$(mktemp -d --tmpdir mkinitcpio.XXXXXX); then
error 'Failed to create temporary working directory in %s' "${TMPDIR:-/tmp}"
return 1
fi
buildroot=${2:-$workdir/root}
if [[ ! -w ${2:-$workdir} ]]; then
error 'Unable to write to build root: %s' "$buildroot"
return 1
fi
# base directory structure
install -dm755 "$buildroot"/{new_root,proc,sys,dev,run,tmp,etc,usr/{local,lib,bin}}
ln -s "usr/lib" "$buildroot/lib"
ln -s "../lib" "$buildroot/usr/local/lib"
ln -s "bin" "$buildroot/usr/sbin"
ln -s "usr/bin" "$buildroot/bin"
ln -s "usr/bin" "$buildroot/sbin"
ln -s "../bin" "$buildroot/usr/local/bin"
ln -s "../bin" "$buildroot/usr/local/sbin"
case $arch in
x86_64)
ln -s "lib" "$buildroot/usr/lib64"
ln -s "usr/lib" "$buildroot/lib64"
;;
esac
# mkinitcpio version stamp
printf '%s' "$version" >"$buildroot/VERSION"
# kernel module dir
[[ $kernver != none ]] && install -dm755 "$buildroot/usr/lib/modules/$kernver/kernel"
# mount tables
ln -s /proc/self/mounts "$buildroot/etc/mtab"
>"$buildroot/etc/fstab"
# indicate that this is an initramfs
>"$buildroot/etc/initrd-release"
# add a blank ld.so.conf to keep ldconfig happy
>"$buildroot/etc/ld.so.conf"
printf '%s' "$workdir"
}
run_build_hook() {
local hook=$1 script= resolved=
local MODULES=() BINARIES=() FILES=() SCRIPT=
# find script in install dirs
if ! script=$(PATH=$_d_install type -P "$hook"); then
error "Hook '$hook' cannot be found"
return 1
fi
# check for deprecation
if resolved=$(readlink "$script") && [[ ${script##*/} != "${resolved##*/}" ]]; then
warning "Hook '%s' is deprecated. Replace it with '%s' in your config" \
"${script##*/}" "${resolved##*/}"
script=$resolved
fi
# source
unset -f build
if ! . "$script"; then
error 'Failed to read %s' "$script"
return 1
fi
if ! declare -f build >/dev/null; then
error 'Hook '$script' has no build function'
return 1
fi
# run
if (( _optquiet )); then
msg2 "Running build hook: [%s]" "${script##*/}"
else
msg2 "Running build hook: [%s]" "$script"
fi
build
# if we made it this far, return successfully. Hooks can
# do their own error catching if it's severe enough, and
# we already capture errors from the add_* functions.
return 0
}
try_enable_color() {
local colors
if ! colors=$(tput colors 2>/dev/null); then
warning "Failed to enable color. Check your TERM environment variable"
return
fi
if (( colors > 0 )) && tput setaf 0 &>/dev/null; then
_color_none=$(tput sgr0)
_color_bold=$(tput bold)
_color_blue=$_color_bold$(tput setaf 4)
_color_green=$_color_bold$(tput setaf 2)
_color_red=$_color_bold$(tput setaf 1)
_color_yellow=$_color_bold$(tput setaf 3)
fi
}
install_modules() {
local m moduledest=$BUILDROOT/lib/modules/$KERNELVERSION
local -a xz_comp gz_comp
[[ $KERNELVERSION == none ]] && return 0
if (( $# == 0 )); then
warning "No modules were added to the image. This is probably not what you want."
return 0
fi
cp "$@" "$moduledest/kernel"
# unzip modules prior to recompression
for m in "$@"; do
case $m in
*.xz)
xz_comp+=("$moduledest/kernel/${m##*/}")
;;
*.gz)
gz_comp+=("$moduledest/kernel/${m##*/}")
;;
esac
done
(( ${#xz_comp[*]} )) && xz -d "${xz_comp[@]}"
(( ${#gz_comp[*]} )) && gzip -d "${gz_comp[@]}"
msg "Generating module dependencies"
install -m644 -t "$moduledest" "$_d_kmoduledir"/modules.builtin
# we install all modules into kernel/, making the .order file incorrect for
# the module tree. munge it, so that we have an accurate index. This avoids
# some rare and subtle issues with module loading choices when an alias
# resolves to multiple modules, only one of which can claim a device.
awk -F'/' '{ print "kernel/" $NF }' \
"$_d_kmoduledir"/modules.order >"$moduledest/modules.order"
depmod -b "$BUILDROOT" "$KERNELVERSION"
# remove all non-binary module.* files (except devname for on-demand module loading)
rm "$moduledest"/modules.!(*.bin|devname|softdep)
}
# vim: set ft=sh ts=4 sw=4 et:
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