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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
#
# Settings
BASEDIR=""
FILELIST=".tmpfilelist"
KERNELVERSION="$(uname -r)"
FUNCTIONS="functions" #/lib/initramfs/functions
CONFIG="mkinitcpio.conf"
HOOKDIR="hooks"
INSTDIR="install"
MODULE_FILE=""
SAVELIST=""
GENIMG=""
APPEND=""
QUIET="n"
APPNAME=$(basename "${0}")
usage ()
{
echo "${APPNAME}: usage"
echo " -c CONFIG Use CONFIG file. default: /etc/mkinitcpio.conf"
echo " -k KERNELVERSION Use KERNELVERSION. default: $(uname -r)"
echo " -s NAME Save filelist. default: no"
echo " -b BASEDIR Use BASEDIR. default: /"
echo " -g IMAGE Generate a cpio image as IMAGE. default: no"
echo " -a NAME Append to an existing filelist. default: no"
echo " -q Quiet output. Default: no"
echo " -H HOOKNAME Output help for hook 'HOOKNAME'."
echo " -h This message."
exit 1
}
while getopts 'c:k:s:b:g:a:qH:h' arg; do
case "$arg" in
c) CONFIG="$OPTARG" ;;
k) KERNELVERSION="$OPTARG" ;;
s) SAVELIST="y"; FILELIST="$OPTARG" ;;
b) BASEDIR="$OPTARG" ;;
g) GENIMG="$OPTARG" ;;
a) APPEND="y" FILELIST="$OPTARG" ;;
q) QUIET="y" ;;
H) source "${INSTDIR}/${OPTARG}";
echo "Help for hook '${OPTARG}':"
help
exit 0 ;;
h|?) usage ;;
*) echo "invalid argument '$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}"
#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}"
install
parse_hook
fi
done
if [ "${HAS_MODULES}" == "y" ]; then
[ -e /tmp${MODULEDIR}/ ] && rm -r /tmp${MODULEDIR}/
cp --parents $(grep "file /lib/modules" ${FILELIST} | awk '{print $2}') /tmp/
depmod -b /tmp ${KERNELVERSION}
add_file /tmp${MODULEDIR}/modules.dep ${MODULEDIR}/modules.dep
add_file /tmp${MODULEDIR}/modules.alias ${MODULEDIR}/modules.alias
add_file /tmp${MODULEDIR}/modules.symbols ${MODULEDIR}/modules.symbols
add_file "${MODULE_FILE}" "/modules"
fi
if [ "x$GENIMG" != "x" ]; then
if ! gen_init_cpio ${FILELIST} | gzip -9 > "${GENIMG}"; then
err "Failed to create '${GENIMG}' image"
fi
if [ "x${SAVELIST}" == "x" ]; then
rm ${FILELIST}
fi
fi
[ -e "${MODULE_FILE}" ] && rm "${MODULE_FILE}"
#vim:set ft=sh ts=4 sw=4 noet:
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