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#!/bin/sh
# 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 $() instead of backticks
# use "x${var}" = "x" to test for nulls/empty strings
# incase of embedded spaces, quote all path names and string comarpisons
#
#TODO trap and remove FILELIST
# Settings
BASEDIR=""
FILELIST="$(mktemp /tmp/.tmpfilelist.XXXX)"
KERNELVERSION="$(uname -r)"
FUNCTIONS="functions"
CONFIG="mkinitcpio.conf"
HOOKDIR="hooks"
INSTDIR="install"
MODULE_FILE=""
SAVELIST=""
GENIMG=""
APPEND=""
QUIET="y"
SHOW_AUTOMODS="n"
APPNAME=$(basename "${0}")
usage ()
{
echo "${APPNAME}: usage"
echo " -c CONFIG Use CONFIG file. default: /etc/mkinitcpio.conf"
echo " -k KERNELVERSION Use KERNELVERSION. default: $(uname -r)"
echo " -s NAME Save filelist. default: no"
echo " -b BASEDIR Use BASEDIR. default: /"
echo " -g IMAGE Generate a cpio image as IMAGE. default: no"
echo " -a NAME Append to an existing filelist. default: no"
echo " -v Verbose output. Default: no"
echo " -M Display modules found via autodetection."
echo " -L List all available hooks."
echo " -H HOOKNAME Output help for hook 'HOOKNAME'."
echo " -h This message."
exit 1
}
while getopts ':c:k:s:b:g:a:vH:LMh' arg; do
if [ "${OPTARG:0:1}" = "-" ]; 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" ;;
v) QUIET="n" ;;
H) source "${INSTDIR}/${OPTARG}";
echo "Help for hook '${OPTARG}':"
help
exit 0 ;;
L) echo "Available hooks: "
for h in ${INSTDIR}/*; do
echo " $(basename ${h})"
done
exit 0 ;;
M) SHOW_AUTOMODS="y" ;;
h|?) usage ;;
:) echo "${OPTARG} requires a value..."; usage ;;
*) echo "invalid argument '$arg'"; usage ;;
esac
done
shift $(($OPTIND - 1))
# append a trailing / if needed
if [ "${BASEDIR:${#BASEDIR}}" == "/" ]; then
BASEDIR="${BASEDIR:0:${#BASEDIR}-1}"
fi
MODULEDIR="${BASEDIR}/lib/modules/${KERNELVERSION}"
if [ "x${BASEDIR}" != "x" ]; then
if [ "${BASEDIR:0:1}" != "/" ]; then
echo "base directory '${BASEDIR}' must be an absolute path"
exit 1
elif [ ! -d "${BASEDIR}" ]; then
echo "base directory '${BASEDIR}' does not exist or is not a directory"
exit 1
fi
fi
if [ ! -f "${CONFIG}" ]; then
echo "config file '${CONFIG}' cannot be found, aborting..."
exit 1
fi
source "${CONFIG}"
if [ -f "${FILELIST}" -a "x${APPEND}" == "x" ]; then
if [ "x${SAVELIST}" == "x" ]; then
rm ${FILELIST}
touch "${FILELIST}"
else
echo "destination file list '${FILELIST}' exists - remove before running"
exit 1
fi
elif [ -f "${DESTIMG}" ]; then
echo "destination image '${DESTIMG}' exists - remove before running"
exit 1
else
touch "${FILELIST}"
fi
source "${FUNCTIONS}"
if [ "${SHOW_AUTOMODS}" = "y" ]; then
echo "Modules autodetected:"
source "${INSTDIR}/autodetect"
install
cat "${MODULE_FILE}"
exit 0
fi
echo ":: Begin build"
#parse 'global' hook, as defined in ${CONFIG}
parse_hook
for hook in $HOOKS; do
unset MODULES
unset BINARIES
unset FILES
install () { msg "${hook}: no install function..."; }
if grep "install" "${INSTDIR}/${hook}" >/dev/null 2>&1; then
source "${INSTDIR}/${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 dependancies"
for mod in $(grep "file /lib/modules/${KERNELVERSION}" ${FILELIST} | cut -d' ' -f2); do
dir=$(dirname "${mod}")
mkdir -p "/tmp/${dir}"
cp "${BASEDIR}${mod}" "/tmp/${dir}/"
done
depmod -b /tmp ${KERNELVERSION}
add_file "/tmp/lib/modules/${KERNELVERSION}/modules.dep" "/lib/modules/${KERNELVERSION}/modules.dep"
add_file "/tmp/lib/modules/${KERNELVERSION}/modules.alias" "/lib/modules/${KERNELVERSION}/modules.alias"
add_file "/tmp/lib/modules/${KERNELVERSION}/modules.symbols" "/lib/modules/${KERNELVERSION}/modules.symbols"
fi
status=0
if [ "x$GENIMG" != "x" ]; then
echo -n ":: Generating image '${GENIMG}'..."
if ! gen_init_cpio ${FILELIST} | gzip -9 > "${GENIMG}"; then
echo "FAILED"
status=1
else
echo "SUCCESS"
status=0
fi
if [ "x${SAVELIST}" == "x" ]; then
rm ${FILELIST}
fi
else
echo ":: Dry run complete, use -g IMAGE to generate a real image"
fi
#cleanup - we should probably trap this...
isempty () { [ $(ls -1 "${1}" | wc -l) -eq 0 ]; }
[ -e "${MODULE_FILE}" ] && rm "${MODULE_FILE}"
if [ -d /tmp/lib/modules/${KERNELVERSION} ]; then
rm -rf /tmp/lib/modules/${KERNELVERSION}
isempty /tmp/lib/modules && rm -rf /tmp/lib/modules
isempty /tmp/lib && rm -rf /tmp/lib
fi
exit $status
#vim:set ft=sh ts=4 sw=4 noet:
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