diff options
| -rw-r--r-- | doGui.go | 21 | ||||
| -rw-r--r-- | makeGptPartitions.go | 88 |
2 files changed, 109 insertions, 0 deletions
@@ -38,6 +38,22 @@ func addDrive(devname string, displayDesc string) *Block { return blkpb } +// show the output of parted <dev> print +func showPartitions(blk *Block) { + if blk == nil { + return + } + + log.Info("check if", blk.Name, "is in use") + result, err := shell.RunVerbose([]string{"parted", blk.Name, "print"}) + log.Info("result =", result.Stdout, "err =", err) + out := strings.Join(result.Stdout, "\n") + if err != nil { + out += log.Sprintf("err = %v", err) + } + me.driveInfoBox.SetText(out) +} + func switchDrive(blk *Block) { var inUse bool = false me.currentDev = blk @@ -126,6 +142,11 @@ func drawWindow(win *gadgets.GenericWindow) { return } log.Info("If you got here, gdisk should be safe to run on", me.currentDev.Name) + if err := makeDefaultGPT(me.currentDev.Name); err != nil { + log.Info("PARTITIONING FAILED on", me.currentDev.Name, "with", err) + return + } + showPartitions(me.currentDev) }) grid.NextRow() diff --git a/makeGptPartitions.go b/makeGptPartitions.go new file mode 100644 index 0000000..d272e7d --- /dev/null +++ b/makeGptPartitions.go @@ -0,0 +1,88 @@ +package main + +import ( + "fmt" + "io" + "os" + + "go.wit.com/log" + + "github.com/diskfs/go-diskfs" + "github.com/diskfs/go-diskfs/partition/gpt" +) + +// make a default bootable GPT partition table +func makeDefaultGPT(devname string) error { + // Open disk + // disk, err := diskfs.Open(devname, diskfs.ReadWrite) + disk, err := diskfs.Open(devname, diskfs.WithOpenMode(diskfs.ReadWrite)) + if err != nil { + log.Errorf("Failed to open disk: %v\n", err) + return err + } + + file, err := os.Open(devname) + if err != nil { + log.Errorf("Failed to open file for size: %v\n", err) + return err + } + defer file.Close() + + // Determine disk size via Seek + sizeBytes, err := file.Seek(0, io.SeekEnd) + if err != nil { + log.Errorf("Failed to determine disk size: %v\n", err) + return err + } + sectorSize := int64(512) + totalSectors := uint64(sizeBytes / sectorSize) + + // Setup partitions: + // Partition 1: BIOS boot, ~1MiB, starts at sector 2048 + biosStart := uint64(2048) + biosSize := uint64(1 * 1024 * 1024) // bytes + biosSectors := biosSize / uint64(sectorSize) + + // Partition 2: rest of the disk + rootStart := biosStart + biosSectors + rootSectors := totalSectors - rootStart + + table := &gpt.Table{ + LogicalSectorSize: int(sectorSize), + PhysicalSectorSize: int(sectorSize), + ProtectiveMBR: true, + Partitions: []*gpt.Partition{ + { + Start: biosStart, + End: biosStart + biosSectors - 1, + // Size is optional, but let's provide it + Size: biosSectors * uint64(sectorSize), + // GUID for BIOS boot partition (ESP-like GUID for BIOS boot) + Type: biosBootGUID, + Name: "bios_grub", + }, + { + Start: rootStart, + End: totalSectors - 1, + Size: rootSectors * uint64(sectorSize), + // GUID for Linux filesystem partition + Type: linuxFSGUID, + Name: "root", + }, + }, + } + + if err := disk.Partition(table); err != nil { + log.Errorf("Failed to write GPT partition table: %v", err) + return err + } + + fmt.Println("Partition table successfully written!") + return nil +} + +// GUID definitions (copied from GPT standard tables) +const ( + biosBootGUID = "21686148-6449-6E6F-744E-656564454649" // BIOS boot + linuxFSGUID = "0FC63DAF-8483-4772-8E79-3D69D8477DE4" // Linux filesystem +) |