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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
# the klibc shell or even 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
# incase of embedded spaces, quote all path names and string comarpisons
#
# Settings
TMPDIR="$(mktemp -d /tmp/mkinitcpio.XXXXXX)"
BASEDIR=""
FILELIST="${TMPDIR}/filelist"
MESSAGEFILE="${TMPDIR}/message"
KERNELVERSION="$(uname -r)"
FUNCTIONS="functions"
CONFIG="mkinitcpio.conf"
HOOKDIR="hooks"
INSTDIR="install"
MODULE_FILE=""
SAVELIST=""
GENIMG=""
APPEND=""
PRESET=""
MESSAGE=""
SKIPHOOKS=""
PRESETDIR="mkinitcpio.d"
QUIET="y"
SHOW_AUTOMODS="n"
COMPRESSION="gzip"
if [ ! $UID ]; then
UID=$(id -u)
fi
# Add /{,usr}/sbin to path
# works around undetected problems like in #8448
PATH="${PATH}:/sbin:/usr/sbin"
APPNAME=$(basename "${0}")
usage ()
{
echo "${APPNAME}: usage"
echo " -c CONFIG Use CONFIG file. default: /etc/mkinitcpio.conf"
echo " -k KERNELVERSION Use KERNELVERSION. default: $(uname -r)"
echo " -s NAME Save filelist. default: no"
echo " -b BASEDIR Use BASEDIR. default: /"
echo " -g IMAGE Generate a cpio image as IMAGE. default: no"
echo " -a NAME Append to an existing filelist. default: no"
echo " -p PRESET Build specified preset."
echo " -m MESSAGE Print MESSAGE before passing control to kinit."
echo " -S SKIPHOOKS Skip SKIPHOOKS (comma-separated) when building the image."
echo " -v Verbose output. Default: no"
echo " -M Display modules found via autodetection."
echo " -L List all available hooks."
echo " -H HOOKNAME Output help for hook 'HOOKNAME'."
echo " -h This message."
cleanup
exit 1
}
cleanup ()
{
[ -n "${TMPDIR}" -a -d "${TMPDIR}" ] && rm -rf ${TMPDIR}
}
sighandler() {
cleanup
exit 1
}
trap sighandler TERM INT
while getopts ':c:k:s:b:g:a:p:m:vH:LMhS:' arg; do
if [ "${OPTARG#-}" != "${OPTARG}" ]; then
echo "error: optional argument to '-${arg}' begins with a '-'"
echo " you probably don't want this....aborting."
usage
fi
case "${arg}" in
c) CONFIG="${OPTARG}" ;;
k) KERNELVERSION="${OPTARG}" ;;
s) SAVELIST="y"; FILELIST="${OPTARG}" ;;
b) BASEDIR="${OPTARG}" ;;
g) GENIMG="${OPTARG}" ;;
a) APPEND="y"; SAVELIST="y"; FILELIST="${OPTARG}" ;;
p) PRESET="${OPTARG}" ;;
m) MESSAGE="${OPTARG}" ;;
v) QUIET="n" ;;
S) SKIPHOOKS="${OPTARG}" ;;
H) . "${INSTDIR}/${OPTARG}";
echo "Help for hook '${OPTARG}':"
help
cleanup
exit 0 ;;
L) echo "Available hooks: "
for h in ${INSTDIR}/*; do
echo " $(basename ${h})"
done
cleanup
exit 0 ;;
M) SHOW_AUTOMODS="y" ;;
h|?) usage ;;
:) echo "${OPTARG} requires a value..."; usage ;;
*) echo "invalid argument '${arg}'"; usage ;;
esac
done
shift $((${OPTIND} - 1))
# use preset $PRESET
if [ -n "${PRESET}" ]; then
if [ -f "${PRESETDIR}/${PRESET}.preset" ]; then
# Use -b, -m and -v options specified earlier
PRESET_MKOPTS="${0}"
[ -n "${BASEDIR}" ] && PRESET_MKOPTS="${PRESET_MKOPTS} -b ${BASEDIR}"
[ -n "${MESSAGE}" ] && PRESET_MKOPTS="${PRESET_MKOPTS} -m \"${MESSAGE}\""
[ "${QUIET}" = "n" ] && PRESET_MKOPTS="${PRESET_MKOPTS} -v"
# Build all images
. ${PRESETDIR}/${PRESET}.preset
for p in ${PRESETS[@]}; do
echo "==> Building image \"${p}\""
PRESET_CMD="${PRESET_MKOPTS}"
eval "PRESET_KVER=\"\${${p}_kver}\""
[ -z "${PRESET_KVER}" ] && PRESET_KVER="${ALL_kver}"
eval "PRESET_CONFIG=\"\${${p}_config}\""
[ -z "${PRESET_CONFIG}" ] && PRESET_CONFIG="${ALL_config}"
eval "PRESET_IMAGE=\"\${${p}_image}\""
eval "PRESET_OPTIONS=\"\${${p}_options}\""
if [ -n "${PRESET_KVER}" ]; then
PRESET_CMD="${PRESET_CMD} -k ${PRESET_KVER}"
else
echo "==> No kernel version specified. Skipping image \"${p}\"."
continue
fi
if [ -n "${PRESET_CONFIG}" ]; then
PRESET_CMD="${PRESET_CMD} -c ${PRESET_CONFIG}"
else
echo "==> No configuration file specified. Skipping image \"${p}\"."
continue
fi
if [ -n "${PRESET_IMAGE}" ]; then
PRESET_CMD="${PRESET_CMD} -g ${PRESET_IMAGE}"
else
echo "==> No image file specified. Skipping image \"${p}\"."
continue
fi
if [ -n "${PRESET_OPTIONS}" ]; then
PRESET_CMD="${PRESET_CMD} ${PRESET_OPTIONS}"
fi
echo "==> Running command: ${PRESET_CMD}"
if eval ${PRESET_CMD}; then
echo "==> SUCCESS"
else
echo "==> FAIL"
fi
done
cleanup
exit 0
else
echo "Preset ${PRESET} does not exist. Exiting."
cleanup
exit 1
fi
fi
# append a trailing / if needed
if [ "${BASEDIR}" = "${BASEDIR%/}" ]; then
BASEDIR="${BASEDIR}/"
fi
MODULEDIR="${BASEDIR}/lib/modules/${KERNELVERSION}"
if [ -n "${BASEDIR}" ]; then
if [ "${BASEDIR}" = "${BASEDIR#/}" ]; then
BASEDIR="$(pwd)/${BASEDIR}"
elif [ ! -d "${BASEDIR}" ]; then
echo "base directory '${BASEDIR}' does not exist or is not a directory"
cleanup
exit 1
fi
fi
if [ ! -f "${CONFIG}" ]; then
echo "config file '${CONFIG}' cannot be found, aborting..."
cleanup
exit 1
fi
. "${CONFIG}"
if [ -f "${FILELIST}" -a -z "${APPEND}" ]; then
if [ -z "${SAVELIST}" ]; then
rm ${FILELIST}
touch "${FILELIST}"
else
echo "destination file list '${FILELIST}' exists - remove before running"
cleanup
exit 1
fi
else
touch "${FILELIST}"
fi
BASEDIR=$(echo ${BASEDIR} | tr -s /)
MODULEDIR=$(echo ${MODULEDIR} | tr -s /)
. "${FUNCTIONS}"
if [ "${SHOW_AUTOMODS}" = "y" ]; then
echo "Modules autodetected:"
. "${INSTDIR}/autodetect"
install
cat "${MODULE_FILE}"
cleanup
exit 0
fi
if [ -z "${GENIMG}" ]; then
echo ":: Begin dry run"
else
echo ":: Begin build"
fi
#parse 'global' hook, as defined in ${CONFIG}
parse_hook
for hook in ${HOOKS}; do
echo "${SKIPHOOKS}" | grep -qw ${hook} && continue
unset MODULES
unset BINARIES
unset FILES
install () { msg "${hook}: no install function..."; }
# Deprecation check
# A hook is considered deprecated if it is a symlink
# within $INSTDIR.
if [ -h "${INSTDIR}/${hook}" ]; then
newhook="$(readlink -ne "${INSTDIR}/${hook}")"
if [ -n "${newhook}" -a "${INSTDIR}/$(basename ${newhook})" -ef "${newhook}" ]; then
newhook="$(basename ${newhook})"
echo " -------------------------------------------------------------------"
echo " WARNING: Hook \"${hook}\" is deprecated."
echo " Replace it with \"${newhook}\" in your configuration file."
echo " -------------------------------------------------------------------"
hook="${newhook}"
fi
fi
if grep "install" "${INSTDIR}/${hook}" >/dev/null 2>&1; then
. "${INSTDIR}/${hook}"
echo ":: Parsing hook [${hook}]"
install
parse_hook
else
die "Hook '${hook}' can not be found."
fi
done
if [ "${HAS_MODULES}" = "y" ]; then
echo ":: Generating module dependencies"
for mod in $(grep "file /lib/modules/${KERNELVERSION}" ${FILELIST} | cut -d' ' -f2); do
dir=$(dirname "${mod}")
mkdir -p "${TMPDIR}/${dir}"
cp "${BASEDIR}${mod}" "${TMPDIR}/${dir}/"
done
/sbin/depmod -b ${TMPDIR} ${KERNELVERSION}
add_file "${TMPDIR}/lib/modules/${KERNELVERSION}/modules.dep" "/lib/modules/${KERNELVERSION}/modules.dep"
add_file "${TMPDIR}/lib/modules/${KERNELVERSION}/modules.alias" "/lib/modules/${KERNELVERSION}/modules.alias"
add_file "${TMPDIR}/lib/modules/${KERNELVERSION}/modules.symbols" "/lib/modules/${KERNELVERSION}/modules.symbols"
fi
status=0
if [ -n "${GENIMG}" ]; then
echo -n ":: Generating image '${GENIMG}'..."
if ! /sbin/gen_init_cpio ${FILELIST} | ${COMPRESSION} -9 > "${GENIMG}"; then
echo "FAILED"
status=1
else
echo "SUCCESS"
status=0
fi
if [ -z "${SAVELIST}" ]; then
rm ${FILELIST}
fi
else
echo ":: Dry run complete, use -g IMAGE to generate a real image"
fi
cleanup
exit ${status}
#vim:set ft=sh ts=4 sw=4 noet:
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