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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 /usr/lib/initcpio/hooks /lib/initcpio/hooks)
INSTDIR=(install /usr/lib/initcpio/install /lib/initcpio/install)
PRESETDIR=mkinitcpio.d
COMPRESSION=gzip
declare 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
declare -A RUNHOOKS
# export a sane PATH
export PATH='/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'
# 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:
-A, --add <hooks> Add specified hooks, comma separated, to image
-c, --config <config> Use alternate config file. (default: /etc/mkinitcpio.conf)
-g, --generate <path> Generate cpio image and write to specified path
-H, --hookhelp <hookname> Display help for given hook and exit
-h, --help Display this message and exit
-k, --kernel <kernelver> Use specified kernel version (default: $(uname -r))
-L, --listhooks List all available hooks
-M, --automods Display modules found via autodetection
-n, --nocolor Disable colorized output messages
-p, --preset <file> Build specified preset from /etc/mkinitcpio.d
-S, --skiphooks <hooks> Skip specified hooks, comma-separated, during build
-s, --save Save build directory. (default: no)
-t, --builddir <dir> Use DIR as the temporary build directory
-v, --verbose Verbose output (default: no)
-z, --compress <program> Use an alternate compressor on the image
EOF
}
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}
}
resolve_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 $kernel ]]; then
error "specified kernel image does not exist: \`%s'" "$kernel"
return 1
fi
if file -Lb "$kernel" | grep -oP '(?<=version )[^ ]+'; then
return 0
fi
error "invalid kernel specified: \`%s'" "$optkver"
return 1
}
find_moduledir() {
local d
for d in {/usr,}/lib/modules; do
if [[ -d $d/$1/ ]]; then
printf '%s' "$d/$1/"
return 0
fi
done
error "unable to locate module directory for kernel \`%s'" "$1"
return 1
}
compute_hookset() {
for h in $HOOKS "${ADDHOOKS[@]}"; do
in_array "$h" "${SKIPHOOKS[@]}" && continue
hooks+=("$h")
done
}
. "$FUNCTIONS"
trap 'cleanup 130' INT
trap 'cleanup 143' TERM
OPT_SHORT='A:c:g:H:hk:mnLMp:S:st:vz:'
OPT_LONG=('add:' 'config:' 'generate:' 'hookhelp:' 'help' 'kernel:' 'listhooks' 'automods'
'nocolor' 'preset:' 'skiphooks:' 'save' 'builddir:' 'verbose' 'compress:')
if ! parseopts "$OPT_SHORT" "${OPT_LONG[@]}" -- "$@"; then
exit 1
fi
set -- "${OPTRET[@]}"
unset OPT_SHORT OPT_LONG OPTRET
while :; do
case $1 in
-A|--add)
shift
IFS=, read -r -a add <<< "$1"
ADDHOOKS+=("${add[@]}")
unset add ;;
-c|--config)
shift
CONFIG=$1 ;;
-k|--kernel)
shift
optkver=$1 ;;
-s|--save)
SAVELIST=1 ;;
-g|--generate)
shift
[[ -d $1 ]] && die "Invalid image path -- must not be a directory"
if ! GENIMG=$(readlink -f "$1") || [[ ! -e ${GENIMG%/*} ]]; then
die "Unable to write to path: \`%s'" "$1"
fi ;;
-h|--help)
usage
cleanup 0 ;;
-p|--preset)
shift
PRESET=$1 ;;
-n|--nocolor)
COLOR=0 ;;
-v|--verbose)
QUIET=0 ;;
-S|--skiphooks)
shift
IFS=, read -r -a skip <<< "$1"
SKIPHOOKS+=("${skip[@]}")
unset skip ;;
-H|--hookhelp)
shift
if script=$(find_in_dirs "$1" "${INSTDIR[@]}"); then
. "$script"
if [[ $(type -t help) != function ]]; then
error "No help for hook $1"
exit 1
fi
else
error "No hook '$1'"
exit 1
fi
msg "Help for hook '$1':"
help
exit 0 ;;
-L|--listhooks)
msg "Available hooks"
for dir in "${INSTDIR[@]}"; do
( cd "$dir" &>/dev/null && printf ' %s\n' * )
done | sort -u | column -c$(tput cols)
exit 0 ;;
-M|--automods)
SHOW_AUTOMODS=1 ;;
-t|--builddir)
shift
TMPDIR=$1 ;;
-z|--compress)
shift
optcompress=$1 ;;
--)
shift
break 2 ;;
esac
shift
done
if [[ -t 1 ]] && (( COLOR )); then
# prefer terminal safe colored and bold text when tput is supported
if tput setaf 0 &>/dev/null; then
NC="$(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="$BOLD\e[1;33m"
fi
fi
readonly NC BOLD BLUE GREEN RED YELLOW
# insist that /proc and /dev be mounted (important for chroots)
# NOTE: avoid using mountpoint for this -- look for the paths that we actually
# use in mkinitcpio. Avoids issues like FS#26344.
[[ -e /proc/self/mountinfo ]] || die "/proc must be mounted!"
[[ -e /dev/fd ]] || die "/dev must be mounted!"
KERNELVERSION=$(resolve_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/usr/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 $PRESET ]]; then
# Use -b, -m and -v options specified earlier
declare -a preset_mkopts preset_cmd
(( QUIET )) || preset_mkopts+=(-v)
# Build all images
. "$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 "${!preset_config:-$ALL_config}")
else
warning "No configuration file specified. Skipping image \`%s'" "$p"
continue
fi
preset_image=${p}_image
if [[ ${!preset_image} ]]; then
preset_cmd+=(-g "${!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 [[ ! -f $CONFIG ]]; then
die "Config file does not exist: \`%s'" "$CONFIG"
fi
. "$CONFIG"
# after returning, hooks are populated into the array 'hooks'
# HOOKS should not be referenced from here on
compute_hookset
if (( ${#hooks[*]} == 0 )); then
die "Invalid config: No hooks found"
fi
MODULEDIR=$(find_moduledir "$KERNELVERSION") || cleanup 1
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 functrace and trap to catch errors in add_* functions
declare -i builderrors=0
set -o functrace
trap '(( $? )) && [[ $FUNCNAME = add_* ]] && (( ++builderrors ))' RETURN
for hook in "${hooks[@]}"; do
run_build_hook "$hook" || (( ++builderrors ))
done
# process config file
parse_hook
write_image_config
# switch out the error handler to catch all errors
trap -- RETURN
trap '(( ++builderrors ))' ERR
if (( ${#ADDED_MODULES[*]} )); then
printf '%s\0' "${MODPATHS[@]}" | sort -zu |
xargs -0 cp -t "$BUILDROOT/usr/lib/modules/$KERNELVERSION/kernel"
# unzip modules prior to recompression
gzip -dr "$BUILDROOT/usr/lib/modules/$KERNELVERSION/kernel"
msg "Generating module dependencies"
install -m644 -t "$BUILDROOT/usr/lib/modules/$KERNELVERSION" \
"$MODULEDIR"/modules.{builtin,order}
depmod -b "$BUILDROOT" "$KERNELVERSION"
# remove all non-binary module.* files (except devname for on-demand module loading)
rm "$BUILDROOT/usr/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 +o functrace
trap -- ERR
declare -i status=0
if [[ $GENIMG ]]; then
msg "Creating $COMPRESSION initcpio image: %s" "$GENIMG"
case $COMPRESSION in
xz)
COMPRESSION_OPTIONS+=' --check=crc32'
;;
esac
cpio_opts=('-R' '0:0' '-0' '-o' '-H' 'newc')
if (( QUIET )); then
cpio_opts+=('--quiet')
fi
# write version stamp
printf '%s' "$version" > "$BUILDROOT/VERSION"
pushd "$BUILDROOT" >/dev/null
find . -print0 |
bsdcpio "${cpio_opts[@]}" |
$COMPRESSION $COMPRESSION_OPTIONS > "$GENIMG"
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:
|