claude-os

seeseemelk/claude-os

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Author	SHA1	Message	Date
AI	5229758092	Add FAT32 driver, mount app, fix shell cd/path resolution - FAT32 VFS driver (fat32.h, fat32.c): reads BPB, FAT table, cluster chains, directory entries (8.3 SFN), file read/write, mount via fat32_mount_device() - mount app: writes 'device mountpoint' to /sys/vfs/mount to trigger FAT32 mount from userspace - VFS sysfs mount namespace in kernel.c: handles mount requests via sysfs write to /sys/vfs/mount, delegates to FAT32 driver - Shell cd: validates target directory exists before updating CWD, resolves relative paths (., .., components) to absolute paths - Shell run_command: resolves ARG1 paths relative to CWD so apps like cat and ls receive absolute paths automatically - Fixed FAT32 root directory access: use fs->root_cluster when VFS mount root node has inode=0	2026-02-23 14:52:41 +00:00
AI	d1bf69ce0d	Add sysfs VFS driver, SYS_OPEN/CLOSE syscalls, cat app Sysfs: - New VFS driver mounted at /sys that lets kernel drivers expose virtual text files via namespace registration - Drivers call sysfs_register(name, ops, ctx) with list/read/write callbacks for their namespace - IDE driver registers 'ide' namespace exposing per-device attributes: model, type, channel, drive, sectors, sector_size - Tested: ls /sys -> ide, ls /sys/ide -> hdd1 cd1, cat /sys/ide/hdd1/model -> QEMU HARDDISK Syscalls: - Added SYS_OPEN (11) and SYS_CLOSE (12) for file I/O from userspace - Extended SYS_READ/SYS_WRITE to handle VFS file descriptors (fd >= 3) - Updated userspace syscalls.h with open()/close() wrappers Apps: - New 'cat' app: reads and displays file contents via open/read/close - Updated 'ls' to accept path argument via ARG1 env var - Updated shell to pass ARG1 env var to external commands	2026-02-23 14:26:52 +00:00
AI	c25ba1fccd	feat: shell (sh) with keyboard driver, SYS_READ, SYS_EXEC - PS/2 keyboard driver: IRQ1 handler, scancode set 1 translation, ring buffer, shift key support - SYS_READ (fd=0): non-blocking keyboard read for stdin - SYS_YIELD: calls schedule_tick directly (no nested INT 0x80) - SYS_EXEC: loads binary from CPIO initrd, replaces process image - User-space libc: crt0.S (C runtime startup), syscalls.h (inline syscall wrappers, basic string functions) - Shell app (sh): readline with echo/backspace, builtins (cd, env, help, exit), fork+exec for external commands - Updated build_apps.sh: C app support with crt0 linking, libc include path, .bss section in objcopy Tested: shell boots, keyboard input works, hello-world runs via fork+exec, env shows CWD, exit cleanly terminates.	2026-02-23 13:08:06 +00:00

Author

SHA1

Message

Date

5229758092

Add FAT32 driver, mount app, fix shell cd/path resolution

- FAT32 VFS driver (fat32.h, fat32.c): reads BPB, FAT table, cluster
  chains, directory entries (8.3 SFN), file read/write, mount via
  fat32_mount_device()
- mount app: writes 'device mountpoint' to /sys/vfs/mount to trigger
  FAT32 mount from userspace
- VFS sysfs mount namespace in kernel.c: handles mount requests via
  sysfs write to /sys/vfs/mount, delegates to FAT32 driver
- Shell cd: validates target directory exists before updating CWD,
  resolves relative paths (., .., components) to absolute paths
- Shell run_command: resolves ARG1 paths relative to CWD so apps
  like cat and ls receive absolute paths automatically
- Fixed FAT32 root directory access: use fs->root_cluster when
  VFS mount root node has inode=0

2026-02-23 14:52:41 +00:00

d1bf69ce0d

Add sysfs VFS driver, SYS_OPEN/CLOSE syscalls, cat app

Sysfs:
- New VFS driver mounted at /sys that lets kernel drivers expose
  virtual text files via namespace registration
- Drivers call sysfs_register(name, ops, ctx) with list/read/write
  callbacks for their namespace
- IDE driver registers 'ide' namespace exposing per-device attributes:
  model, type, channel, drive, sectors, sector_size
- Tested: ls /sys -> ide, ls /sys/ide -> hdd1 cd1,
  cat /sys/ide/hdd1/model -> QEMU HARDDISK

Syscalls:
- Added SYS_OPEN (11) and SYS_CLOSE (12) for file I/O from userspace
- Extended SYS_READ/SYS_WRITE to handle VFS file descriptors (fd >= 3)
- Updated userspace syscalls.h with open()/close() wrappers

Apps:
- New 'cat' app: reads and displays file contents via open/read/close
- Updated 'ls' to accept path argument via ARG1 env var
- Updated shell to pass ARG1 env var to external commands

2026-02-23 14:26:52 +00:00

c25ba1fccd

feat: shell (sh) with keyboard driver, SYS_READ, SYS_EXEC

- PS/2 keyboard driver: IRQ1 handler, scancode set 1 translation,
  ring buffer, shift key support
- SYS_READ (fd=0): non-blocking keyboard read for stdin
- SYS_YIELD: calls schedule_tick directly (no nested INT 0x80)
- SYS_EXEC: loads binary from CPIO initrd, replaces process image
- User-space libc: crt0.S (C runtime startup), syscalls.h (inline
  syscall wrappers, basic string functions)
- Shell app (sh): readline with echo/backspace, builtins (cd, env,
  help, exit), fork+exec for external commands
- Updated build_apps.sh: C app support with crt0 linking, libc
  include path, .bss section in objcopy

Tested: shell boots, keyboard input works, hello-world runs via
fork+exec, env shows CWD, exit cleanly terminates.

2026-02-23 13:08:06 +00:00

3 Commits