e04ca28812
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.
43 lines
1.9 KiB
C
43 lines
1.9 KiB
C
#pragma once
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// open(2) flags.
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//
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// These are the *Linux x86-64* values, and they have to be: every program in
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// the userland is built against a libc that sends Linux flag values, and the
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// kernel reads them with these constants. They disagreed for a long time, with
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// results that looked like filesystem corruption rather than like a mistake --
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// Linux O_APPEND (0x400) landed on SchOS's O_TRUNC, so `cmd >> file`
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// truncated the file it was meant to extend, and Linux O_TRUNC (0x200) landed
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// on O_CREATE, so `cmd > file` left whatever was past the new end in place.
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// Neither failure pointed anywhere near a header.
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//
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// Do not tidy these into a neat sequence. They are an external interface.
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#define O_RDONLY 0x000000
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#define O_WRONLY 0x000001
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#define O_RDWR 0x000002
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#define O_ACCMODE 0x000003
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#define O_CREATE 0x000040 /* Linux O_CREAT (0100) */
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#define O_CREAT O_CREATE /* the spelling every program uses */
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#define O_EXCL 0x000080 /* Linux O_EXCL (0200) */
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#define O_NOCTTY 0x000100 /* Linux O_NOCTTY (0400) */
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#define O_TRUNC 0x000200 /* Linux O_TRUNC (01000) */
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#define O_APPEND 0x000400 /* Linux O_APPEND (02000) */
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#define O_NONBLOCK 0x000800 /* Linux O_NONBLOCK (04000); no-op here */
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#define O_DIRECTORY 0x010000 /* Linux O_DIRECTORY (0200000) */
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#define O_NOFOLLOW 0x020000 /* Linux O_NOFOLLOW (0400000) */
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#define O_CLOEXEC 0x080000 /* Linux O_CLOEXEC (02000000) */
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// SchOS-only, placed above every flag Linux defines so it can never be
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// mistaken for one. 0x40000 was used before and collides with Linux O_NOATIME.
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#define O_EXTENT 0x8000000 /* sparse-extent hint */
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#define F_DUPFD 0
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#define F_GETFD 1
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#define F_SETFD 2
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#define F_GETFL 3
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#define F_SETFL 4
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#define F_DUPFD_CLOEXEC 1030 // Linux value
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#define FD_CLOEXEC 1
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