Two ANSI bugs, both found by running fastfetch rather than by reading the
parser, and both invisible to anything that spells its escapes out in full.
ESC[m with no parameters means ESC[0m. ECMA-48 is explicit that an omitted
parameter takes its default and SGR's default is 0, and sgr() iterated its
parameter list -- which is empty in exactly that case, so the loop body never
ran and the reset was silently dropped.
Programs emit the bare form constantly. fastfetch writes "\x1b[32m1%\x1b[m", so
everything after the first coloured character stayed green forever. With a
background colour it is much worse: its palette swatch sets a white background
and resets, the reset did nothing, and the console went white-on-white and
stayed there -- filling the screen with white rectangles as it scrolled, which
looks like a corrupted framebuffer rather than one missing branch.
OSC sequences were not a state at all, so ESC ] fell through and the payload
printed as text: a hyperlinked path arrived as "Disk (]8;;file:///\]8;;\)".
Nothing here acts on an operating-system command -- there is no window title and
no hyperlink to follow -- but *discarding* one is not optional, because the
alternative is printing somebody's URL into the middle of their output. ESC \
ends it, and an ESC followed by anything else is handed back to the escape state
rather than eaten, so a malformed OSC does not swallow the sequence after it.
Verified by screendumping the framebuffer after two consecutive fastfetch runs:
identical output both times, near-white coverage down from most of the screen to
2% (the palette swatch's own white cell), and the disk line reading "Disk (/)".
Also installs docs/branding/Ascii/ascii_50.txt as /usr/share/schos/logo.txt --
Shift as characters, at the width that leaves room for an info block on an
80-column console. Installed from the branding directory rather than copied into
sysroot by hand, so there is one source.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VQ7Qx8E1q1M1bbCq8QLHS2
PSOGM drew ":(" -- two dots and a parenthesis. It now draws Guru, the icon from
docs/branding/: a chamfered head with two eye knockouts and a flat mouth, in the
:| register.
The old reasoning is kept in the file rather than deleted, because it is the
thing being traded away: ":(" was "legible as a mood without being a picture of
anything, and does not pretend the machine has feelings about what just
happened." That is a real argument and a face is a louder claim. What it buys is
identity -- ":(" is recognisably Microsoft's, and a crash screen is the single
screenshot most likely to leave the machine, so it is the worst place to be
wearing somebody else's face. The octagon also quotes the chamfered corners of
the old SchOS letterforms, which is the only part of that mark still in use.
Still drawn from primitives, for the original reason: it scales with the display
and costs no space in the kernel image. A scanline fill for the head, two
rectangles and one more knocked out of it -- no allocation, no locks, nothing
that can fail halfway, which is the whole constraint of panic context. The
geometry is expressed in the same 200-unit box docs/branding/guru.svg uses so
the two cannot drift without somebody editing a number on purpose.
The eyes and mouth are knocked out of the head rather than drawn on top of it,
which is what keeps them legible small: a hole in a solid reads at sizes a
stroke does not.
Verified by crashing on purpose -- echo c > /proc/sysrq -- and screendumping the
framebuffer through the QEMU monitor. The serial report still says ":(", and
should: Guru cannot be drawn in ASCII, and a mood marker in a log is not the
icon.
Separately, and found by looking at the boot splash rather than at the code:
boot/common/ui.c includes logo.h, theme.h and font.h, and the Makefile rule for
the loader listed none of them. A new logo therefore did not rebuild the loader.
The splash had been drawing a mask compiled six hours earlier while `make`
reported nothing to do, and the only symptom was a boot screen quietly
disagreeing with the kernel about what the logo is. The kernel half never showed
it because those objects are built with -MD -MP and track their own headers.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VQ7Qx8E1q1M1bbCq8QLHS2
Shift is the logo, Guru is the icon, SchCotie is the mascot, and the difference
between them is not stylistic. An icon works once, at one size, in one state. A
mascot has to be able to *do* things -- confused, pleased, asleep, seen from
behind -- which is why it costs more and is drawn last. Written down because
this is exactly the kind of decision that gets re-derived badly.
Assets/ becomes docs/branding/, which also fixes two things:
* Filenames had spaces in them, so every reference needed quoting. They are
lowercase and hyphenated now.
* Assets/ held hand-written SVG and generated PNG in one directory, which is
the one rule docs/guides/layout.md states.
The guide records what was previously only in people's heads:
* The constraint everything answers to -- include/logo.h is a 128x128
single-channel coverage mask, so a mark has to survive as a solid shape in
one colour and be recognisable at 24 px. Colour is the last decision, never
the first.
* Guru's purple is load-bearing. PSOGM_BG #4B1D9A is deliberately not the
accent #7C5CFF, and theme.h's rule is that the full-bleed purple belongs
entirely to failure. If Guru appears in accent violet on a sticker, the deep
purple stops meaning "the machine stopped" -- and it is the only colour in
the system that means anything.
* Why shift-mask.svg is a separate file from shift.svg. mklogo.py reads ink as
(255 - luminance) * alpha, so tones survive as coverage and the relationship
inverts: darkest here is brightest on screen. Copying the violet fills would
light the object from below.
* Why a raster is committed beside its SVG. inkscape is not a build
prerequisite, so requiring a vector rasteriser would break the build on most
hosts for a file that changes about once a year.
* That the BSD daemon is copyrighted and SchCotie must be drawn from the
concept rather than from Beastie. A daemon is a Greek daimon and a Unix
background process; neither is ownable. The pitchfork, the sneakers and that
face are.
Format rule: SVG, or PNG at high resolution with no lossy compression, nothing
else. SVG is the source of truth for every mark and a raster is generated from
it, never edited.
include/logo.h regenerates byte-identical from the new path -- only the source
comment differs. The two old wordmark SVGs were deleted outside this session and
are left deleted; their PNGs are kept as superseded-*.png for reference.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VQ7Qx8E1q1M1bbCq8QLHS2
Nexoniarz