Rename Schunix to SchOS; the kernel becomes SchIFT

Removes the "-unix" element and with it any trademark exposure to The
Open Group.

The split follows the ecosystem layout: SchOS is the system, and the
kernel has its own name. Kernel-identity strings are the only places
that take SchIFT -- uname(2) sysname, /proc/version, and the two licence
sentences that say "kernel" outright. That is what every Unix does here:
`uname -s` on Linux reports the kernel, not the distribution. Everything
a user reads as the product -- panic screen, boot menu, error prefixes,
docs, LICENSE, NOTICE -- is SchOS.

schunix.img is schos.img, the logo assets and the musl TLS patch are
renamed, and __SCHUNIX__ is __SCHOS__ (the define and the patch that
consumes it moved together).

Two things the rename broke, both found by the bootcheck suite:

  - shmtest 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 left the write running two bytes past the literal
    and the compare reading past the data, failing a file-backed mmap
    that was working correctly. Now written and compared through one
    constant with sizeof.
  - bootcheck asserted a 31-byte file after appending to
    "hello-from-schunix"; the shorter string makes it 29.

Both are the same mistake: a string literal whose length is written out
somewhere else. Full suite green -- base, Tty, Ps, Sock, Fb, Usb, Evdev.
This commit is contained in:
Nexoniarz 2026-08-09 14:09:59 +02:00
commit e04ca28812
83 changed files with 520 additions and 601 deletions

View file

@ -1,6 +1,6 @@
# SPDX-License-Identifier: Apache-2.0
# toybox — 0BSD-licensed: https://landley.net/toybox/
# Provides Schunix's core utilities (ls, cat, cp, mv, rm, mkdir, ...) as a
# Provides SchOS's core utilities (ls, cat, cp, mv, rm, mkdir, ...) as a
# single multicall binary, installed under sysroot/bin/ once per applet name.
#
# mkfs (tools/mkfs.c) doesn't understand symlinks or hardlink dedup — each
@ -16,7 +16,7 @@ TOYBOX_SHA256 := ad88a921133ae2231d9f2df875ec0bd42af4429145caea7d7db9e02208a6fd
TARBALL := $(DISTDIR)/toybox-$(TOYBOX_VERSION).tar.gz
CFLAGS := -static -D__SCHUNIX__ -I$(MUSL)/include -fno-stack-protector
CFLAGS := -static -D__SCHOS__ -I$(MUSL)/include -fno-stack-protector
LDFLAGS := -static -L$(MUSL)/lib -lc
# The applet list is not hard-coded any more: `toybox` with no arguments prints