nexoniarz/SchOS
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Rename Schunix to SchOS; the kernel becomes SchIFT

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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
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5
kernel/dev/procfs.c
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@ -143,7 +143,7 @@ gen_cpuinfo(struct sbuf *sb)
// otherwise be told a VM with four processors has four to schedule on, when
// three of them are enumerated and idle. "cpu cores" stays the present count,
// which is what that field means.
// Real values, from CPUID. These used to read "Schunix" and "Schunix virtual
// Real values, from CPUID. These used to read "SchOS" and "SchOS virtual
// CPU" -- a thing to print when you have not asked the processor, and
// actively unhelpful, because identifying the machine is the one question
// /proc/cpuinfo exists to answer.
@ -204,7 +204,8 @@ gen_cpuinfo(struct sbuf *sb)
static void
gen_version(struct sbuf *sb)
{
sb_puts(sb, "Schunix version 0.1.0 (schunix) #1 SMP x86_64\n");
// The kernel's name, not the system's -- same as "Linux version 6.x" here.
sb_puts(sb, "SchIFT version 0.1.0 (schift) #1 SMP x86_64\n");
}
static void