Author: Daniel Baumann <daniel.baumann@progress-linux.org>
Description: Using dpkg with --force-unsafe-io to improve performance.

diff -Naurp debootstrap.orig/scripts/debian-common debootstrap/scripts/debian-common
--- debootstrap.orig/scripts/debian-common
+++ debootstrap/scripts/debian-common
@@ -1,3 +1,13 @@
+case $CODENAME in
+	etch*|lenny)
+		dpkg_force_unsafe_io=""
+		;;
+
+	*)
+		dpkg_force_unsafe_io="--force-unsafe-io"
+		;;
+esac
+
 if doing_variant fakechroot; then
 	test "$FAKECHROOT" = "true" || error 1 FAKECHROOTREQ "This variant requires fakechroot environment to be started"
 fi
@@ -102,7 +112,7 @@ Status: install ok installed" >> "$TARGE
 	x_feign_install dpkg
 
 	x_core_install () {
-		smallyes '' | in_target dpkg --force-depends --install $(debfor "$@")
+		smallyes '' | in_target dpkg --force-depends $dpkg_force_unsafe_io --install $(debfor "$@")
 	}
 
 	p () {
@@ -163,7 +173,7 @@ Status: install ok installed" >> "$TARGE
 
 	smallyes '' |
 		(repeatn 5 in_target_failmsg UNPACK_REQ_FAIL_FIVE "Failure while unpacking required packages.  This will be attempted up to five times." "" \
-		dpkg --status-fd 8 --force-depends --unpack $(debfor $required) 8>&1 1>&7 || echo EXITCODE $?) |
+		dpkg --status-fd 8 --force-depends $dpkg_force_unsafe_io --unpack $(debfor $required) 8>&1 1>&7 || echo EXITCODE $?) |
 		dpkg_progress $baseprog $bases UNPACKREQ "Unpacking required packages" UNPACKING
 
 	info CONFREQ "Configuring required packages..."
@@ -184,7 +194,7 @@ echo \"Warning: Fake start-stop-daemon c
 
 	smallyes '' |
 		(in_target_failmsg CONF_REQ_FAIL "Failure while configuring required packages." "" \
-		dpkg --status-fd 8 --configure --pending --force-configure-any --force-depends 8>&1 1>&7 || echo EXITCODE $?) |
+		dpkg --status-fd 8 --configure --pending --force-configure-any --force-depends $dpkg_force_unsafe_io 8>&1 1>&7 || echo EXITCODE $?) |
 		dpkg_progress $baseprog $bases CONFREQ "Configuring required packages" CONFIGURING
 
 	baseprog=0
@@ -201,7 +211,7 @@ echo \"Warning: Fake start-stop-daemon c
 		# XXX: progress is tricky due to how dpkg_progress works
 		# -- cjwatson 2009-07-29
 		p; smallyes '' |
-		in_target dpkg --force-overwrite --force-confold --skip-same-version --install $(debfor $predep)
+		in_target dpkg --force-overwrite --force-confold $dpkg_force_unsafe_io --skip-same-version --install $(debfor $predep)
 		base=$(without "$base" "$predep")
 		done_predeps="$done_predeps $predep"
 	done
@@ -209,14 +219,14 @@ echo \"Warning: Fake start-stop-daemon c
 	if [ -n "$base" ]; then
 		smallyes '' |
 			(repeatn 5 in_target_failmsg INST_BASE_FAIL_FIVE "Failure while installing base packages.  This will be re-attempted up to five times." "" \
-			dpkg --status-fd 8 --force-overwrite --force-confold --skip-same-version --unpack $(debfor $base) 8>&1 1>&7 || echo EXITCODE $?) |
+			dpkg --status-fd 8 --force-overwrite --force-confold $dpkg_force_unsafe_io --skip-same-version --unpack $(debfor $base) 8>&1 1>&7 || echo EXITCODE $?) |
 			dpkg_progress $baseprog $bases UNPACKBASE "Unpacking base system" UNPACKING
 
 		info CONFBASE "Configuring the base system..."
 
 		smallyes '' |
 			(repeatn 5 in_target_failmsg CONF_BASE_FAIL_FIVE "Failure while configuring base packages.  This will be re-attempted up to five times." "" \
-			dpkg --status-fd 8 --force-confold --skip-same-version --configure -a 8>&1 1>&7 || echo EXITCODE $?) |
+			dpkg --status-fd 8 --force-confold --skip-same-version $dpkg_force_unsafe_io --configure -a 8>&1 1>&7 || echo EXITCODE $?) |
 			dpkg_progress $baseprog $bases CONFBASE "Configuring base system" CONFIGURING
 	fi