GuardBSD
Rust Multi-Microkernel OS • Capability Security • Production-Ready
GuardBSD Documentation
Boot, Shell, and Storage
Boot pipeline, shell usability, filesystems, and disk/storage story.
GuaBoot — 100% BSD Bootloader
No GRUB. No Multiboot. Only BSD.
BIOS → guaboot1 (512B) → guaboot2 (~32KB) → Long Mode → kernel.elf
UEFI → guaboot.efi (~50KB) → kernel.elf- BIOS + UEFI
- 64-bit native
- ELF64 PT_LOAD
- E820 / UEFI memory map
- BootInfo (FreeBSD-compatible)
- Serial debug (COM1)
- ~2,650 lines (C + ASM)
RDI = 0x42534447 ("GBSD")
RSI = *BootInfogsh — Full-Featured Shell (zsh-level)
$ zfs create tank/data
$ ls | grep txt > result.txt
$ sleep 10 &
$ jobs; fg %1
$ alias ll='ls -la'
$ greet() { echo "Hi, $1"; }; greet World- History: ↑↓, Ctrl+R, !123
- Job Control: &, fg, bg, jobs
- Pipes: |, >, >>, <, 2>
- Scripts: #!/usr/bin/gsh
- Tab Completion: commands, paths, variables
Filesystems
| Feature | GuardFS | GuardZFS |
|---|---|---|
| Journaling | Yes | Yes (TXG) |
| Snapshots | Yes | Yes |
| Compression | Yes (LZ4) | Yes (LZ4) |
| Pool | No | Yes |
| RAID-Z | No | Yes (Z1/Z2) |
| Self-Healing | No | Yes (SHA-256) |
| Code | ~3.2K LOC | 1.5K LOC |
zfs create tank/data
mkfs.guardfs /dev/disk0p2
mount -t guardfs /dev/disk0p2 /mntDisk & Storage
- 23 partition types: FAT, NTFS, ext4, FreeBSD, HFS+, GPT, EFI
- Swap: up to 4,
swapon 0, auto-detection - ATA: LBA48, PIO, IDENTIFY
- Cache: 128 × 4KB, LRU, write-back
Partition 1: Linux Swap - 2048 MB [Swap]
Partition 2: GuardZFS - 20480 MB