---
name: schos-rename-and-git
description: "Schunix is now SchOS, the kernel is SchIFT; the tree is under local git as of 2026-08-09"
metadata:
  type: project
---

**On 2026-08-09 the project was renamed from Schunix to SchOS**, to drop the
"-unix" element and any trademark exposure to The Open Group. Nexoniarz's
ecosystem layout:

| Layer | Name |
|---|---|
| Operating system | **SchOS** |
| Kernel | **SchIFT** |
| Desktop environment | SchDE |
| Window manager | SchWM |
| Compositor | SchCom |
| API / subsystem | SchAPI |
| File system | SchFS (unchanged) |

**Every memory written before this date says "Schunix" and is filed under a
`schunix-` slug. That is the old name for this same project -- read it as
SchOS.** They were deliberately not renamed: 42 files and every `[[link]]`
between them, for no gain.

**SchOS vs SchIFT is a real distinction, not a synonym.** Nexoniarz chose the
split explicitly. SchIFT appears *only* where a Unix names its kernel:

- `uname(2)` sysname -> `SchIFT` (nodename is `schos`, it is the host)
- `/proc/version` -> `SchIFT version 0.1.0 (schift) #1 SMP x86_64`
- the two licence sentences that say "kernel" outright, in LICENSE.MIT and
  NOTICE

Everything a user reads as the product is SchOS: panic screen, boot menu,
error prefixes, docs, LICENSE, NOTICE. `schunix.img` is now `schos.img`;
`__SCHUNIX__` is `__SCHOS__`. The kernel source stays at `kernel/`, not
`schift/` -- asked and declined, to keep the diff small.

The `Assets/SchOS * Logo.*` files are renamed but the **artwork inside the
Full and Text logos may still spell the old name as vector paths**. That is
design work, not a code change.

## The tree is under git now -- local only

`git init` on 2026-08-09, first commit `d0f7acf` = the tree as it stood before
the rename, second `e04ca28` = the rename. Before this there was **no version
control at all**, which had already cost real damage: a blanket `sed` rewrote
`#include` lines and string literals with no way to undo it.

`core.autocrlf` is **false** and `.gitattributes` pins `* text eol=lf`. This
matters: the build runs under Git Bash, and a Makefile recipe or `.S` file
checked out with CRLF fails in ways that point nowhere near the cause.

`.gitignore` excludes `build/`, `sysroot/`, `dist/` and the images -- `dist/`
alone is 61 MB of upstream tarballs the build re-fetches.

**There is no remote and there must not be one.** See
[[nexoniarz-sharing-preference]] -- the standing rule is that unfinished work
never leaves the machine. Local commits are fine and wanted; `git push` is not.

## The rename broke two things, both the same mistake

Both found by `tools/bootcheck.ps1`, neither visible at compile time:

- `cmd/shmtest/main.c` wrote `"SCHUNIX-MMAP-OK"` with a hardcoded length of
  `15` and compared it back by hand-counted offsets (`m[3]=='U'`,
  `m[14]=='K'`). The shorter marker made the write run two bytes past the
  literal and the compare read past the data -- **failing a file-backed mmap
  that was working perfectly.** Now one constant plus `sizeof`.
- bootcheck asserted a 31-byte file after appending to `"hello-from-schunix"`;
  the shorter string makes it 29.

**The lesson for any future rename: grep for string literals whose length is
written out separately from the literal.** A compiler cannot catch it and the
failure looks like a broken subsystem.