rocklinux/package/teha/rockinitramfs/libexec/functions

export irfs_libexec_functions=1

# find dynamic (share library) dependencies for a binary
# honors $rootdir and emulates sort of chroot therin
needed_libs() {
	local x y z library libqueue liblist libdirs

	# be sure to favor the 64bit locations
	libdirs="$rootdir/lib64 $rootdir/usr/lib64 $rootdir/lib"
	for N in `sed -e"s,^,${rootdir}," ${rootdir}/etc/ld.so.conf | tr '\n' ' '` ; do
		[ -d "$N" ] && libdirs="$libdirs $N"
	done

	libqueue="$( mktemp -t libqueue-XXXXXX )"
	liblist="$( mktemp -d -t liblist-XXXXXX )"

	# initialize the queue with $*
	for x ; do
		echo "$rootdir/$x"
	done > "$libqueue"

	# get the required libraries of each file
	while read y ; do
		${cross_compile}readelf -d "${y}" 2>/dev/null | grep "(NEEDED)" |
		sed -e "s,.*Shared library: \[\(.*\)\],\1," |
		while read library ; do
			[ -e "$liblist/$library" ] && continue

			# use the first library with this name
			find -L ${libdirs} -maxdepth 1 -name "${library}" 2>/dev/null |
			head -n1 |
			while read z ; do
				# put the libraries found into the queue, because they might
				# require other libraries themselves
				echo "$z" >> "$libqueue"
				echo "$z" | sed -e"s,^${rootdir},,"
			done

			# list this library as processed
			touch "$liblist/$library"
		done
	done < "$libqueue"
	rm -f "$libqueue" ; rm -rf "$liblist"
}

# add a file ($1) to the contents-list of initramfs
# optionally you can give a different destination filename
# in $2
# the output is a gen_init_cpio compatible list including all 
# dynamic dependencies and the file itself.
add_with_deps() {
	srcname=$1 ; shift
	dstname=$srcname
	[ -n "$1" ] && dstname=$1

	echo "file $dstname $rootdir/$srcname 755 0 0"
	needed_libs $srcname | while read lib
	do
		echo "file $lib $rootdir/$lib 755 0 0"
	done
}

export -f needed_libs
export -f add_with_deps