Run parted with --script

This makes it non-interactive and prevents the script from silently
hanging when parted finds something weird, e.g.:

    $ sudo rpi-clone /dev/sda
    Warning: The driver descriptor says the physical block size is 2048 bytes, but Linux says it is 512 bytes.

This just hangs, because parted is waiting for an answer:

    $ sudo parted -m /dev/sda unit s print
    Warning: The driver descriptor says the physical block size is 2048 bytes, but Linux says it is 512 bytes.
    Ignore/Cancel?

Author: matthijskooijman

rpi-clone

@@ -689,7 +689,7 @@ fi
 # src_root_dev, if on device other than booted, is not in src_partition_table
 # and src_fdisk_table, but is in src_df_table and src_mount_table
 #
-src_partition_table=$(parted -m "/dev/$src_disk" unit s print | tr -d ';')
+src_partition_table=$(parted --script -m "/dev/$src_disk" unit s print | tr -d ';')
 src_fdisk_table=$(fdisk -l /dev/$src_disk | grep "^/dev/")
 
 tmp=$(df | grep -e "^/dev/$src_disk" -e "^/dev/root" -e "$src_root_dev" \
@@ -1141,7 +1141,7 @@ then
 	exit 1
 fi
 
-dst_partition_table=$(parted -m "/dev/$dst_disk" unit s print | tr -d ';')
+dst_partition_table=$(parted --script -m "/dev/$dst_disk" unit s print | tr -d ';')
 n_dst_parts=$(echo "$dst_partition_table" | tail -n 1 | cut -d ":" -f 1)
 if [ "$n_dst_parts" == "/dev/$dst_disk" ]
 then