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|
#!/bin/bash
# mkinitcpio - modular tool for building an init ramfs cpio image
#
# IMPORTANT: We need to keep a common base syntax here because
# some of these hooks/scripts need to run under busybox's ash -
# therefore, the following constraints should be enforced:
# variables should be quoted and bracketed "${SOMEVAR}"
# inline execution should be done with $() instead of backticks
# use -z "${var}" to test for nulls/empty strings
# in case of embedded spaces, quote all path names and string comparisons
#
declare -r version=%VERSION%
shopt -s extglob
# Settings
FUNCTIONS=functions
CONFIG=mkinitcpio.conf
HOOKDIR=hooks
INSTDIR=install
PRESETDIR=mkinitcpio.d
COMPRESSION=gzip
declare BASEDIR= MODULE_FILE= GENIMG= PRESET= COMPRESSION_OPTIONS= BUILDROOT=
declare NC= BOLD= BLUE= GREEN= RED= YELLOW=
declare -i QUIET=1 SHOW_AUTOMODS=0 SAVELIST=0 COLOR=1
declare -a SKIPHOOKS ADDED_MODULES MODPATHS
# Add /{,usr}/sbin to path
# works around undetected problems like in #8448
PATH=$PATH:/sbin:/usr/sbin
# Sanitize environment further
# GREP_OPTIONS="--color=always" will break everything
# CDPATH can affect cd and pushd
unset GREP_OPTIONS CDPATH
usage() {
cat <<EOF
mkinitcpio $version
usage: ${0##*/} [options]
Options:
-b BASEDIR Use BASEDIR. default: /
-c CONFIG Use CONFIG file. default: /etc/mkinitcpio.conf
-g IMAGE Generate a cpio image as IMAGE. default: no
-H HOOKNAME Output help for hook 'HOOKNAME'.
-h Display this message.
-k KERNELVERSION Use KERNELVERSION. default: $(uname -r)
-L List all available hooks.
-M Display modules found via autodetection.
-n Disable colorized output messages.
-p PRESET Build specified preset from /etc/mkinitcpio.d
-S SKIPHOOKS Skip SKIPHOOKS (comma-separated) when building the image.
-s Save build directory. default: no
-t DIR Use DIR as the temporary build directory.
-v Verbose output. Default: no.
-z COMPRESS Use COMPRESS on resulting image
EOF
cleanup 1
}
cleanup() {
if [[ $workdir ]]; then
# when PRESET is set, we're in the main loop, not a worker process
if (( SAVELIST )) && [[ -z $PRESET ]]; then
msg "build directory saved in %s" "$workdir"
else
rm -rf "$workdir"
fi
fi
exit ${1:0}
}
get_kernver() {
local kernver= kernel=$1
if [[ -z $kernel ]]; then
uname -r
return 0
fi
if [[ ${kernel:0:1} != / ]]; then
echo "$kernel"
return 0
fi
if [[ ! -e $BASEDIR$kernel ]]; then
error "Specified kernel image does not exist: \`%s'" "$BASEDIR$kernel"
return 1
fi
read _ kernver < <(file -Lb "$BASEDIR$kernel" | grep -o 'version [^ ]\+')
if [[ $kernver && -e $BASEDIR/lib/modules/$kernver ]]; then
echo "$kernver"
return 0
fi
[[ ${optkver:0:1} == / ]] && optkver=$BASEDIR$optkver
error "invalid kernel specifier: \`%s'" "$optkver"
return 1
}
. "$FUNCTIONS"
trap 'cleanup 130' INT
trap 'cleanup 143' TERM
while getopts ':A:c:k:sb:g:p:m:nvH:LMhS:t:z:' arg; do
case $arg in
A) IFS=, read -r -a add <<< "$OPTARG"
ADDHOOKS+=("${add[@]}")
unset add ;;
c) CONFIG=$OPTARG ;;
k) optkver=$OPTARG ;;
s) SAVELIST=1 ;;
b) BASEDIR=$OPTARG ;;
g) GENIMG=$OPTARG ;;
h) usage ;;
p) PRESET=$OPTARG ;;
n) COLOR=0 ;;
v) QUIET=0 ;;
S) IFS=, read -r -a skip <<< "$OPTARG"
SKIPHOOKS+=("${skip[@]}")
unset skip ;;
H) if script=$(find_in_dirs "$OPTARG" "${INSTDIR[@]}"); then
. "$script"
if [[ $(type -t help) != function ]]; then
error "No help for hook $OPTARG"
exit 1
fi
else
error "No hook '$OPTARG'"
exit 1
fi
msg "Help for hook '$OPTARG':"
help
exit 0 ;;
L) msg "Available hooks"
for dir in "${INSTDIR[@]}"; do
( cd "$dir" >/dev/null; printf ' %s\n' * )
done | column -c$(tput cols)
exit 0 ;;
M) SHOW_AUTOMODS=1 ;;
t) TMPDIR=$OPTARG ;;
z) optcompress=$OPTARG ;;
:) error "option requires an argument -- '$OPTARG' (use -h for help)"
exit 1 ;;
\?) error "invalid option -- '$OPTARG' (use -h for help)"
exit 1 ;;
esac
done
shift $((OPTIND - 1))
if [[ -t 1 ]] && (( COLOR )); then
# prefer terminal safe colored and bold text when tput is supported
if tput setaf 0 &>/dev/null; then
NC="$(tput sgr0)"
BOLD="$(tput bold)"
BLUE="$BOLD$(tput setaf 4)"
GREEN="$BOLD$(tput setaf 2)"
RED="$BOLD$(tput setaf 1)"
YELLOW="$BOLD$(tput setaf 3)"
else
NC="\e[1;0m"
BOLD="\e[1;1m"
BLUE="$BOLD\e[1;34m"
GREEN="$BOLD\e[1;32m"
RED="$BOLD\e[1;31m"
YELLOW="$BOLD\e[1;33m"
fi
fi
readonly NC BOLD BLUE GREEN RED YELLOW
# insist that /proc and /dev be mounted (important for chroots)
# NOTE: avoid using mountpoint for this -- look for the paths that we actually
# use in mkinitcpio. Avoids issues like FS#26344.
[[ -e /proc/self/mountinfo ]] || die "/proc must be mounted!"
[[ -e /dev/fd ]] || die "/dev must be mounted!"
if [[ $BASEDIR ]]; then
# resolve the path. it might be a relative path and/or contain symlinks
if ! pushd "$BASEDIR" &>/dev/null; then
die "base directory does not exist or is not a directory: \`%s'" "$BASEDIR"
fi
BASEDIR=$(pwd -P)
BASEDIR=${BASEDIR%/}
popd &>/dev/null
fi
KERNELVERSION=$(get_kernver "$optkver") || cleanup 1
if [[ $TMPDIR ]]; then
if [[ ! -d $TMPDIR ]]; then
error "Temporary directory does not exist or is not a directory: \`%s'" "$TMPDIR"
cleanup 1
fi
if [[ ! -w $TMPDIR ]]; then
error "Temporary directory is not writeable: \`%s'" "$TMPDIR"
cleanup 1
fi
fi
workdir=$(TMPDIR=$TMPDIR mktemp -d --tmpdir mkinitcpio.XXXXXX)
BUILDROOT=$workdir/root
# explicitly create the buildroot
mkdir -p "$BUILDROOT/lib/modules/$KERNELVERSION/kernel"
# use preset $PRESET
if [[ $PRESET ]]; then
# allow absolute path to preset file, else resolve it
if [[ "${PRESET:0:1}" != '/' ]]; then
printf -v PRESET '%s/%s.preset' "$PRESETDIR" "$PRESET"
fi
if [[ -f "$PRESET" ]]; then
# Use -b, -m and -v options specified earlier
declare -a preset_mkopts preset_cmd
[[ $BASEDIR ]] && preset_mkopts+=(-b "$BASEDIR")
(( QUIET )) || preset_mkopts+=(-v)
# Build all images
. "$PRESET"
for p in "${PRESETS[@]}"; do
msg "Building image from preset: '$p'"
preset_cmd=("${preset_mkopts[@]}")
preset_kver=${p}_kver
if [[ ${!preset_kver:-$ALL_kver} ]]; then
preset_cmd+=(-k "${!preset_kver:-$ALL_kver}")
else
warning "No kernel version specified. Skipping image \`%s'" "$p"
continue
fi
preset_config=${p}_config
if [[ ${!preset_config:-$ALL_config} ]]; then
preset_cmd+=(-c "$BASEDIR${!preset_config:-$ALL_config}")
else
warning "No configuration file specified. Skipping image \`%s'" "$p"
continue
fi
preset_image=${p}_image
if [[ ${!preset_image} ]]; then
preset_cmd+=(-g "$BASEDIR${!preset_image}")
else
warning "No image file specified. Skipping image \`%s'" "$p"
continue
fi
preset_options=${p}_options
if [[ ${!preset_options} ]]; then
preset_cmd+=(${!preset_options}) # intentional word splitting
fi
msg2 "${preset_cmd[*]}"
"$0" "${preset_cmd[@]}"
done
cleanup 0
else
die "Preset not found: \`%s'" "$PRESET"
fi
fi
if [[ $GENIMG ]]; then
IMGPATH=$(readlink -f "$GENIMG")
if [[ -z $IMGPATH || ! -w ${IMGPATH%/*} ]]; then
die "Unable to write to path: \`%s'" "$GENIMG"
fi
fi
if [[ ! -f "$CONFIG" ]]; then
die "Config file does not exist: \`%s'" "$CONFIG"
fi
. "$CONFIG"
MODULEDIR=$BASEDIR/lib/modules/$KERNELVERSION/
if [[ ! -d $MODULEDIR ]]; then
die "'$MODULEDIR' is not a valid kernel module directory"
fi
if (( SHOW_AUTOMODS )); then
msg "Modules autodetected"
autodetect=$(find_in_dirs 'autodetect' "${INSTDIR[@]}")
. "$autodetect"
build
cat "$MODULE_FILE"
cleanup 0
fi
if [[ -z $GENIMG ]]; then
msg "Starting dry run: %s" "$KERNELVERSION"
else
COMPRESSION=${optcompress:-$COMPRESSION}
if ! type -P "$COMPRESSION" >/dev/null; then
die "Unable to locate compression method: %s" "$COMPRESSION"
fi
msg "Starting build: %s" "$KERNELVERSION"
fi
# set errtrace and a trap to catch errors in parse_hook
declare -i builderrors=0
set -E
trap '[[ $FUNCNAME = parse_hook ]] && (( ++builderrors ))' ERR
# save vars from $CONFIG; they will be parsed last
for var in MODULES BINARIES FILES; do
declare "cfg_$var=${!var}"
done
for hook in ${HOOKS} "${ADDHOOKS[@]}"; do
in_array "$hook" "${SKIPHOOKS[@]}" && continue
unset MODULES BINARIES FILES SCRIPT
build() { error "$hook: no build function..."; return 1; }
# find script in install dirs
if ! script=$(find_in_dirs "$hook" "${INSTDIR[@]}"); then
error "Hook '$hook' cannot be found."
(( ++builderrors ))
continue
fi
# check for deprecation
if [[ -L $script ]]; then
if ! realscript=$(readlink -e "$script"); then
error "$script is a broken symlink to $(realpath "$script")"
(( ++builderrors ))
continue
fi
warning "Hook '%s' is deprecated. Replace it with '%s' in your config" "$script" "$realscript"
script=$realscript
fi
# source
if ! . "$script"; then
error 'Failed to read %s' "$script"
(( ++builderrors ))
continue
fi
# run
msg2 "Parsing hook: [%s]" "${script##*/}"
build
parse_hook
done
# restore $CONFIG vars add to image
for var in cfg_{MODULES,BINARIES,FILES}; do
declare "${var#cfg_}=${!var}"
done
parse_hook
# reset the trap to catch all errors
trap '(( ++builderrors ))' ERR
if (( ${#ADDED_MODULES[*]} )); then
cp "${MODPATHS[@]}" "$BUILDROOT/lib/modules/$KERNELVERSION/kernel"
# unzip modules prior to recompression
gzip -dr "$BUILDROOT/lib/modules/$KERNELVERSION/kernel"
msg "Generating module dependencies"
install -m644 -t "$BUILDROOT/lib/modules/$KERNELVERSION" \
"$BASEDIR/lib/modules/$KERNELVERSION"/modules.{builtin,order}
depmod -b "$BUILDROOT" "${KERNELVERSION}"
# remove all non-binary module.* files (except devname for on-demand module loading)
rm "$BUILDROOT/lib/modules/$KERNELVERSION"/modules.!(*.bin|devname)
else
warning "No modules were added to the image. This is probably not what you want."
fi
# unset errtrace and trap
set +E
trap ERR
declare -i status=0
declare -a pipesave
if [[ "${GENIMG}" ]]; then
msg "Creating $COMPRESSION initcpio image: %s" "$GENIMG"
[[ "$COMPRESSION" = xz ]] && COMPRESSION_OPTIONS+=" --check=crc32"
# write version stamp
printf '%s' "$version" > "$BUILDROOT/VERSION"
pushd "$BUILDROOT" >/dev/null
find . -print0 |
bsdcpio $( (( QUIET )) && echo '--quiet' ) -0oH newc |
$COMPRESSION $COMPRESSION_OPTIONS > "$IMGPATH"
pipesave=("${PIPESTATUS[@]}") # save immediately
popd >/dev/null
if (( pipesave[0] )); then
errmsg="find reported an error"
elif (( pipesave[1] )); then
errmsg="bsdcpio reported an error"
elif (( pipesave[2] )); then
errmsg="$COMPRESSION reported an error"
fi
if (( builderrors )); then
warning "errors were encountered during the build. The image may not be complete."
status=1
fi
if [[ $errmsg ]]; then
error "Image generation FAILED: %s" "$errmsg"
status=1
else
msg "Image generation successful"
fi
else
msg "Dry run complete, use -g IMAGE to generate a real image"
fi
cleanup $status
# vim: set ft=sh ts=4 sw=4 et:
|