diff -Naur pacman-3.3.2.orig/scripts/makepkg.sh.in pacman-3.3.2/scripts/makepkg.sh.in
--- pacman-3.3.2.orig/scripts/makepkg.sh.in	2009-10-14 03:52:36.830628581 +0800
+++ pacman-3.3.2/scripts/makepkg.sh.in	2009-10-14 04:00:02.830582198 +0800
@@ -58,6 +58,7 @@
 FORCE=0
 INFAKEROOT=0
 GENINTEG=0
+GETINTEG=0
 SKIPINTEG=0
 INSTALL=0
 NOBUILD=0
@@ -501,6 +502,20 @@
 	popd &>/dev/null
 }
 
+get_checksums() {
+	unset INTEGRITY_CHECK
+
+	local integ
+	for integ in md5 sha1 sha256 sha384 sha512; do
+		grep "${integ}sums=(" "$startdir/$BUILDSCRIPT" &> /dev/null && \
+			INTEGRITY_CHECK=(${INTEGRITY_CHECK[@]} $integ)
+	done
+
+	[ ${#INTEGRITY_CHECK[@]} -eq 0 ] && source "$MAKEPKG_CONF"
+
+	return 0
+}
+
 generate_checksums() {
 	msg "$(gettext "Generating checksums for source files...")"
 	plain ""
@@ -556,6 +571,35 @@
 	done
 }
 
+update_checksums() {
+	local file="$startdir/$BUILDSCRIPT"
+	local integ=${INTEGRITY_CHECK[0]}
+	if grep "&& ${integ}sums=(" "$file" | grep '$CARCH' &> /dev/null; then
+		error "$(gettext "Multi-arch checksum update not supported. Exiting...")"
+		exit 1
+	else
+		for integ in ${INTEGRITY_CHECK[@]}; do
+			sed -i "/${integ}sums=(/,/)$/d" "$file"
+		done
+
+		if grep "# vim: set" "$file" &> /dev/null; then
+			sed -i '/# vim: set/d' "$file"
+			sed -i -e :a -e '/^\n*$/{$d;N;ba' -e '}' "$file"
+			local vimset=1
+		fi
+
+		generate_checksums >> "$file"
+
+		if [ -n "$vimset" ]; then
+			echo >> "$file"
+			echo "# vim: set ts=2 sw=2 et:" >> "$file"
+		fi
+	fi
+
+	msg "$(gettext "Updated checksums in %s")" "$BUILDSCRIPT"
+	return 0
+}
+
 check_checksums() {
 	[ ${#source[@]} -eq 0 ] && return 0
 
@@ -1420,6 +1464,7 @@
 	echo "$(gettext "  -f, --force      Overwrite existing package")"
 	echo "$(gettext "  -g, --geninteg   Generate integrity checks for source files")"
 	echo "$(gettext "      --skipinteg  Do not fail when integrity checks are missing")"
+	printf "$(gettext "  -G, --getinteg Update integrity checks in %s")\n" "$BUILDSCRIPT"
 	echo "$(gettext "  -h, --help       This help")"
 	echo "$(gettext "  -i, --install    Install package after successful build")"
 	echo "$(gettext "  -L, --log        Log package build process")"
@@ -1465,9 +1510,9 @@
 ARGLIST=$@
 
 # Parse Command Line Options.
-OPT_SHORT="AcCdefFghiLmop:rRsV"
+OPT_SHORT="AcCdefFgGhiLmop:rRsV"
 OPT_LONG="allsource,asroot,ignorearch,clean,cleancache,nodeps"
-OPT_LONG="$OPT_LONG,noextract,force,forcever:,geninteg,help,holdver"
+OPT_LONG="$OPT_LONG,noextract,force,forcever:,geninteg,getinteg,help,holdver"
 OPT_LONG="$OPT_LONG,install,log,nocolor,nobuild,rmdeps,repackage,skipinteg"
 OPT_LONG="$OPT_LONG,source,syncdeps,version,config:"
 # Pacman Options
@@ -1500,6 +1545,7 @@
 		--forcever)       shift; FORCE_VER=$1;;
 		-F)               INFAKEROOT=1 ;;
 		-g|--geninteg)    GENINTEG=1 ;;
+		-G| --getinteg)   GETINTEG=1 ;;
 		--holdver)        HOLDVER=1 ;;
 		-i|--install)     INSTALL=1 ;;
 		-L|--log)         LOGGING=1 ;;
@@ -1664,10 +1710,21 @@
 	mkdir -p "$srcdir"
 	cd "$srcdir"
 	download_sources
+	get_checksums
 	generate_checksums
 	exit 0 # $E_OK
 fi
 
+if [ "$GETINTEG" -eq 1 ]; then
+	mkdir -p "$srcdir"
+	cd "$srcdir"
+	download_sources
+	get_checksums
+	update_checksums
+	#cd "$startdir" # don't exit; continue build
+	exit 0 # $E_OK
+fi
+
 if [ "$(type -t package)" = "function" ]; then
 	PKGFUNC=1
 fi