Linux/MacOSX:check that the requested size of file container is less than available

disk free space. Add a CLI switch to disable this check.

src/Main/CommandLineInterface.cpp

@@ -30,6 +30,7 @@ namespace VeraCrypt
 		ArgSize (0),
 		ArgVolumeType (VolumeType::Unknown),
 		ArgTrueCryptMode (false),
+		ArgDisableFileSizeCheck (false),
 		StartBackgroundTask (false)
 	{
 		wxCmdLineParser parser;
@@ -96,6 +97,7 @@ namespace VeraCrypt
 		parser.AddOption (L"",	L"volume-type",			_("Volume type"));
 		parser.AddParam (								_("Volume path"), wxCMD_LINE_VAL_STRING, wxCMD_LINE_PARAM_OPTIONAL);
 		parser.AddParam (								_("Mount point"), wxCMD_LINE_VAL_STRING, wxCMD_LINE_PARAM_OPTIONAL);
+		parser.AddSwitch (L"",	L"no-size-check",		_("Disable check of container size against disk free space."));
 
 		wxString str;
 		bool param1IsVolume = false;
@@ -331,6 +333,7 @@ namespace VeraCrypt
 		ArgForce = parser.Found (L"force");
 
 		ArgTrueCryptMode = parser.Found (L"truecrypt");
+		ArgDisableFileSizeCheck = parser.Found (L"no-size-check");
 
 #if !defined(TC_WINDOWS) && !defined(TC_MACOSX)
 		if (parser.Found (L"fs-options", &str))

src/Main/CommandLineInterface.h

@@ -83,6 +83,7 @@ namespace VeraCrypt
 		VolumeType::Enum ArgVolumeType;
 		bool ArgTrueCryptMode;
         shared_ptr<SecureBuffer> ArgTokenPin;
+        bool ArgDisableFileSizeCheck;
 
 		bool StartBackgroundTask;
 		UserPreferences Preferences;

src/Main/Forms/VolumeSizeWizardPage.cpp

@@ -21,7 +21,8 @@ namespace VeraCrypt
 		MaxVolumeSize (0),
 		MaxVolumeSizeValid (false),
 		MinVolumeSize (1),
-		SectorSize (sectorSize)
+		SectorSize (sectorSize),
+		AvailableDiskSpace (0)
 	{
 		VolumeSizePrefixChoice->Append (LangString["KB"], reinterpret_cast <void *> (1024));
 		VolumeSizePrefixChoice->Append (LangString["MB"], reinterpret_cast <void *> (1024 * 1024));
@@ -34,6 +35,10 @@ namespace VeraCrypt
 			VolumeSizeTextCtrl->Disable();
 			VolumeSizeTextCtrl->SetValue (L"");
 		}
+		else
+		{
+			AvailableDiskSpace = (uint64) diskSpace.GetValue ();
+		}
 
 		FreeSpaceStaticText->SetFont (Gui->GetDefaultBoldFont (this));
 
@@ -97,7 +102,8 @@ namespace VeraCrypt
 		{
 			try
 			{
-				if (GetVolumeSize() >= MinVolumeSize && (!MaxVolumeSizeValid || GetVolumeSize() <= MaxVolumeSize))
+				uint64 uiVolumeSize = GetVolumeSize();
+				if (uiVolumeSize >= MinVolumeSize && (!MaxVolumeSizeValid || uiVolumeSize <= MaxVolumeSize) && (CmdLine->ArgDisableFileSizeCheck || !AvailableDiskSpace || uiVolumeSize <= AvailableDiskSpace))
 					return true;
 			}
 			catch (...) { }

src/Main/Forms/VolumeSizeWizardPage.h

@@ -49,6 +49,7 @@ namespace VeraCrypt
 		bool MaxVolumeSizeValid;
 		uint64 MinVolumeSize;
 		uint32 SectorSize;
+		uint64 AvailableDiskSpace;
 	};
 }