From 8607717b7b756d38f6e6716c71f8973306217081 Mon Sep 17 00:00:00 2001
From: Mike Fleetwood <mike.fleetwood@googlemail.com>
Date: Fri, 6 Feb 2015 15:36:31 +0000
Subject: [PATCH] Make "loop" table appear as unknown whole device file system
 (#743181)

Previously GParted displayed a device containing the parted "loop"
partition table signature "GNU Parted Loopback 0" and nothing else, as
an unrecognised device.

Now make GParted display this as a virtual whole disk device partition
with unknown contents, complete with the unable to detect a file system
warning.  This change then allows a whole disk device file system to be
created with the following two steps:
1) Create "loop" partition table on a device;
2) Format to required file system.

GParted represents a whole disk device file system as:

    mydevice.max_prims = 1
    mydevice.disktype  = "none"
    mydevice.partitions[0].type         = TYPE_PRIMARY
    mydevice.partitions[0].whole_device = true
    mydevice.partitions[0].filesystem   = FS_EXT4  (example)

Now represents just Parted's "loop" signature as:

    mydevice.max_prims = 1
    mydevice.disktype  = "loop"
    mydevice.partitions[0].type         = TYPE_PRIMARY
    mydevice.partitions[0].whole_device = true
    mydevice.partitions[0].filesystem   = FS_UNKNOWN

And as before, an unpartitioned device as:

    mydevice.max_prims = -1
    mydevice.disktype  = _("unrecognized")
    mydevice.partitions[0].type         = TYPE_UNALLOCATED
    mydevice.partitions[0].whole_device = true
    mydevice.partitions[0].filesystem   = FS_UNALLOCATED

Bug 743181 - Add unpartitioned drive read-write support
---
 src/GParted_Core.cc | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/src/GParted_Core.cc b/src/GParted_Core.cc
index 9b333d25..f3963afe 100644
--- a/src/GParted_Core.cc
+++ b/src/GParted_Core.cc
@@ -351,6 +351,32 @@ void GParted_Core::set_devices_thread( std::vector<Device> * pdevices )
 					set_mountpoints( temp_device.partitions );
 					set_used_sectors( temp_device.partitions, NULL );
 				}
+				// Drive just containing libparted "loop" signature
+				// "GNU Parted Loopback 0" and nothing else
+				else if ( lp_disk && lp_disk->type && lp_disk->type->name &&
+				          strcmp( lp_disk->type->name, "loop" ) == 0         )
+				{
+					temp_device.disktype = lp_disk->type->name;
+					temp_device.max_prims = 1;
+
+					// Create virtual partition covering the whole
+					// disk device with unknown contents
+					Partition partition_temp;
+					partition_temp.Set( temp_device.get_path(),
+					                    lp_device->path,
+					                    1,
+					                    TYPE_PRIMARY,
+					                    true,
+					                    FS_UNKNOWN,
+					                    0LL,
+					                    temp_device.length - 1LL,
+					                    temp_device.sector_size,
+					                    false,
+					                    false );
+					// Place unknown file system message in this partition
+					partition_temp.messages = messages;
+					temp_device.partitions.push_back( partition_temp );
+				}
 				else
 				{
 					temp_device.disktype =