integrate-distro.sh: Add option -f

This allows mount failures without -f if the target directory doesn't
exist. Otherwise typos led to creation of those directories.

Signed-off-by: Jan Lindemann <jan@janware.com>

scripts/integrate-distro.sh

@@ -412,6 +412,7 @@ usage()
 	       $myname [options] [install|mount|unmount|mkinitrd|fs]
 
 	options:
+		-f
 		-d target-device
 		-n target-name
 		-p file with root password
@@ -437,7 +438,7 @@ usage()
 
 get_opts()
 {
-	set -- `getopt 'hd:n:a:p:k:u:w:s:r:' $*`
+	set -- `getopt 'hd:n:a:p:k:u:w:s:r:f' $*`
 	while [ "$1" != -- ] ; do
 		case "$1" in
 			-h)
@@ -479,6 +480,9 @@ get_opts()
 				env_ssh_auth_sock=$2
 				shift
 				;;
+			-f)
+				o_force=1
+				;;
 			*)
 				usage 1
 				;;
@@ -644,6 +648,12 @@ assert_not_mounted()
 
 setup_bind_mounts()
 {
+	[ -d "$root" ] || {
+		[ "$o_force" ] || {
+			echo "directory \"$root\" does not exist"
+			exit 1
+		}
+	}
 	local fs
 	for fs in /dev /sys /proc /srv/ftp; do
 		check_mount $fs || {