[misc] fix small issues

* SetAutoMount()/GetAutoMount() should check for INVALID_HANDLE_VALUE and not NULL.
  Also we don't actually need to open MOUNTMGR_DOS_DEVICE_NAME rw to issue an IOCTL.
* ToggleEsp() failed to exit properly when an ESP offset was specified.
* Introduce PI_MAX to explicitly set the size of the partition_information table.
* write_sectors() has write retry, so there's no need to perform one on top of it.
* When we exit FormatThread(), GetLogicalName() should attempt to look for the the
  main partition and be silent.

src/drive.c

@@ -74,7 +74,7 @@ PF_TYPE_DECL(NTAPI, NTSTATUS, NtQueryVolumeInformationFile, (HANDLE, PIO_STATUS_
 RUFUS_DRIVE_INFO SelectedDrive;
 extern BOOL installed_uefi_ntfs, write_as_esp;
 extern int nWindowsVersion, nWindowsBuildNumber;
-uint64_t partition_offset[3];
+uint64_t partition_offset[PI_MAX];
 uint64_t persistence_size = 0;
 
 /*
@@ -93,9 +93,8 @@ BOOL SetAutoMount(BOOL enable)
 	DWORD size;
 	BOOL ret = FALSE;
 
-	hMountMgr = CreateFileA(MOUNTMGR_DOS_DEVICE_NAME, GENERIC_READ|GENERIC_WRITE,
+	hMountMgr = CreateFileA(MOUNTMGR_DOS_DEVICE_NAME, 0, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
-		FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+	if (hMountMgr == INVALID_HANDLE_VALUE)
-	if (hMountMgr == NULL)
 		return FALSE;
 	ret = DeviceIoControl(hMountMgr, IOCTL_MOUNTMGR_SET_AUTO_MOUNT, &enable, sizeof(enable), NULL, 0, &size, NULL);
 	CloseHandle(hMountMgr);
@@ -110,9 +109,8 @@ BOOL GetAutoMount(BOOL* enabled)
 
 	if (enabled == NULL)
 		return FALSE;
-	hMountMgr = CreateFileA(MOUNTMGR_DOS_DEVICE_NAME, GENERIC_READ|GENERIC_WRITE,
+	hMountMgr = CreateFileA(MOUNTMGR_DOS_DEVICE_NAME, 0, FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
-		FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+	if (hMountMgr == INVALID_HANDLE_VALUE)
-	if (hMountMgr == NULL)
 		return FALSE;
 	ret = DeviceIoControl(hMountMgr, IOCTL_MOUNTMGR_QUERY_AUTO_MOUNT, NULL, 0, enabled, sizeof(*enabled), &size, NULL);
 	CloseHandle(hMountMgr);
@@ -1292,8 +1290,10 @@ BOOL ToggleEsp(DWORD DriveIndex, uint64_t PartitionOffset)
 		}
 	} else {
 		for (i = 0, j = 0; i < DriveLayout->PartitionCount; i++) {
-			if (DriveLayout->PartitionEntry[i].StartingOffset.QuadPart == PartitionOffset)
+			if (DriveLayout->PartitionEntry[i].StartingOffset.QuadPart == PartitionOffset) {
 				DriveLayout->PartitionEntry[i].Gpt.PartitionType = PARTITION_GENERIC_ESP;
+				break;
+			}
 		}
 	}
 	if (i >= DriveLayout->PartitionCount) {
@@ -1853,6 +1853,8 @@ BOOL CreatePartition(HANDLE hDrive, int partition_style, int file_system, BOOL m
 		} else {
 			assert(FALSE);
 		}
+		// NB: Because we already subtracted the backup GPT size from the main partition size and
+		// this extra partition is indexed on main size, it does not overflow into the backup GPT.
 		main_part_size_in_sectors = ((main_part_size_in_sectors / SelectedDrive.SectorsPerTrack) -
 			extra_part_size_in_tracks) * SelectedDrive.SectorsPerTrack;
 	}

src/drive.h

@@ -41,6 +41,7 @@
 #define PI_MAIN                             0
 #define PI_ESP                              1
 #define PI_CASPER                           2
+#define PI_MAX                              3
 
 // The following should match VDS_FSOF_FLAGS as much as possible
 #define FP_FORCE                            0x00000001
@@ -362,7 +363,7 @@ typedef struct {
 	} ClusterSize[FS_MAX];
 } RUFUS_DRIVE_INFO;
 extern RUFUS_DRIVE_INFO SelectedDrive;
-extern uint64_t partition_offset[3];
+extern uint64_t partition_offset[PI_MAX];
 
 BOOL SetAutoMount(BOOL enable);
 BOOL GetAutoMount(BOOL* enabled);

src/format.c

@@ -705,7 +705,7 @@ out:
 static BOOL ClearMBRGPT(HANDLE hPhysicalDrive, LONGLONG DiskSize, DWORD SectorSize, BOOL add1MB)
 {
 	BOOL r = FALSE;
-	uint64_t i, j, last_sector = DiskSize/SectorSize, num_sectors_to_clear;
+	uint64_t i, last_sector = DiskSize/SectorSize, num_sectors_to_clear;
 	unsigned char* pBuf = (unsigned char*) calloc(SectorSize, 1);
 
 	PrintInfoDebug(0, MSG_224);
@@ -729,32 +729,16 @@ static BOOL ClearMBRGPT(HANDLE hPhysicalDrive, LONGLONG DiskSize, DWORD SectorSi
 
 	uprintf("Erasing %d sectors", num_sectors_to_clear);
 	for (i = 0; i < num_sectors_to_clear; i++) {
-		for (j = 1; j <= WRITE_RETRIES; j++) {
 		CHECK_FOR_USER_CANCEL;
-			if (write_sectors(hPhysicalDrive, SectorSize, i, 1, pBuf) == SectorSize)
+		if (write_sectors(hPhysicalDrive, SectorSize, i, 1, pBuf) != SectorSize)
-				break;
-			if (j >= WRITE_RETRIES)
 			goto out;
-			uprintf("Retrying in %d seconds...", WRITE_TIMEOUT / 1000);
-			// Don't sit idly but use the downtime to check for conflicting processes...
-			Sleep(CheckDriveAccess(WRITE_TIMEOUT, FALSE));
-		}
 	}
 	for (i = last_sector - MAX_SECTORS_TO_CLEAR; i < last_sector; i++) {
-		for (j = 1; j <= WRITE_RETRIES; j++) {
 		CHECK_FOR_USER_CANCEL;
-			if (write_sectors(hPhysicalDrive, SectorSize, i, 1, pBuf) == SectorSize)
-				break;
-			if (j >= WRITE_RETRIES) {
 		// Windows seems to be an ass about keeping a lock on a backup GPT,
 		// so we try to be lenient about not being able to clear it.
-				uprintf("Warning: Failed to clear backup GPT...");
+		if (write_sectors(hPhysicalDrive, SectorSize, i, 1, pBuf) != SectorSize)
-				r = TRUE;
+			break;
-				goto out;
-			}
-			uprintf("Retrying in %d seconds...", WRITE_TIMEOUT / 1000);
-			Sleep(CheckDriveAccess(WRITE_TIMEOUT, FALSE));
-		}
 	}
 	r = TRUE;
 
@@ -2195,7 +2179,7 @@ out:
 	safe_unlockclose(hLogicalVolume);
 	safe_unlockclose(hPhysicalDrive);	// This can take a while
 	if (IS_ERROR(FormatStatus)) {
-		volume_name = GetLogicalName(DriveIndex, 0, TRUE, FALSE);
+		volume_name = GetLogicalName(DriveIndex, partition_offset[PI_MAIN], TRUE, TRUE);
 		if (volume_name != NULL) {
 			if (MountVolume(drive_name, volume_name))
 				uprintf("Re-mounted volume as %C: after error", drive_name[0]);

src/rufus.rc

@@ -33,7 +33,7 @@ LANGUAGE LANG_NEUTRAL, SUBLANG_NEUTRAL
 IDD_DIALOG DIALOGEX 12, 12, 232, 326
 STYLE DS_SETFONT | DS_MODALFRAME | DS_CENTER | WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | WS_SYSMENU
 EXSTYLE WS_EX_ACCEPTFILES
-CAPTION "Rufus 3.12.1711"
+CAPTION "Rufus 3.12.1712"
 FONT 9, "Segoe UI Symbol", 400, 0, 0x0
 BEGIN
     LTEXT           "Drive Properties",IDS_DRIVE_PROPERTIES_TXT,8,6,53,12,NOT WS_GROUP
@@ -395,8 +395,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 3,12,1711,0
+ FILEVERSION 3,12,1712,0
- PRODUCTVERSION 3,12,1711,0
+ PRODUCTVERSION 3,12,1712,0
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -414,13 +414,13 @@ BEGIN
             VALUE "Comments", "https://rufus.ie"
             VALUE "CompanyName", "Akeo Consulting"
             VALUE "FileDescription", "Rufus"
-            VALUE "FileVersion", "3.12.1711"
+            VALUE "FileVersion", "3.12.1712"
             VALUE "InternalName", "Rufus"
             VALUE "LegalCopyright", "© 2011-2020 Pete Batard (GPL v3)"
             VALUE "LegalTrademarks", "https://www.gnu.org/licenses/gpl-3.0.html"
             VALUE "OriginalFilename", "rufus-3.12.exe"
             VALUE "ProductName", "Rufus"
-            VALUE "ProductVersion", "3.12.1711"
+            VALUE "ProductVersion", "3.12.1712"
         END
     END
     BLOCK "VarFileInfo"