Add or fix options to control static and dynamic configuration. Keep
the default of scteken, but default to statically configuring all available
emulators (now 3 instead of 1).
The dumb emulator is almost usable. libedit and libreadline handle
dumb terminals perfectly for at least shell history. less(1) works
as well as possible except on exit. But curses programs make messes.
The dumb emulator has strange color support, with 2 dumb colors for
normal output but fancy colorization for the cursor, mouse pointer and
(with a non-dumb initial emulator) for low-level console output.
Using the sc emulator instead of the default of scteken fixes at least
the following bugs:
- NUL is a printing character in cons25 but not in teken
- teken doesn't support fixed colors for "reverse" video.
- The best versions of sc are about 10 times faster than scteken (for
printing to the frame buffer). This version is only about 5 times
faster.
Fix configuration features:
- make SC_DFLT_TERM (for setting the initial emulator) a normal option.
Add configuration features:
- negative options SC_NO_TERM_* for omitting emulators in the static config.
Modules for emulators might work, but I don't know of any
- vidcontrol -e shows the available emulators
- vidcontrol -E <emulator> sets the active emulator.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.
The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
No functional change intended.
`vidcontrol -h 0` is acceptable, so be explicit that it's less than zero
that is not allowed.
Reported by: Siva Mahadevan
Sponsored by: The FreeBSD Foundation
Advertise this by changing the defaults to mostly red. If you don't like
this, change them (almost) back using:
vidcontrol -c charcolors,base=7,height=0
vidcontrol -c mousecolors,base=0[,height=15]
The (graphics mode only) mouse cursor colors were hard-coded to a black
border and lightwhite interior. Black for the border is the worst
possible default, since it is the same as the default black background
and not good for any dark background. Reversing this gives the better
default of X Windows. Coloring everything works better still. Now
the coloring defaults to a lightwhite border and red interior.
Coloring for the character cursor is more complicated and mode
dependent. The new coloring doesn't apply for hardware cursors. For
non-block cursors, it only applies in graphics mode. In text mode,
the cursor color was usually a hard-coded (dull)white for the background
only, unless the foreground was white when it was a hard-coded black
for the background only, unless the foreground was white and the
background was black it was reverse video. In graphics mode, it was
always reverse video for the block cursor. Reverse video is worse,
especially over cutmarking regions, since cutmarking still uses simple
reverse video (nothing better is possible in text mode) and double
reverse video for the cursor gives normal video. Now, graphics mode
uses the same algorithm as the best case for text mode in all cases
for graphics mode. The hard-coded sequence { white, black, } for the
background is now { red, white, blue, } where the first 2 colors can
be configured. The blue color at the end is a sentinel which prevents
reverse video being used in most cases but breaks the compatibility
setting for white on black and black on white characters. This will
be fixed later. The compatibility setting is most needed for mono modes.
The previous commit to syscons.c changed sc_cnterm() to be more careful.
It followed null pointers in some cases. But sc_cnterm() has been
unreachable for 15+ years since changes for multiple consoles turned
off calls to the the cnterm destructor for all console drivers. Before
them, it was only called at boot time. So no driver with an attached
console has ever been unloadable and not even the non-console destructors
have been tested much.
and repurposing "blink". Improve accuracy of documentation of historical
mistakes and other bugs.
"blink" now means "set the blink attribute for the target(s)" instead of
"set the blink attribute and clear other attributes [and control flags]".
It was even more confusing to use "blinking" for the single attribute to
keep the old meaning for "blink".
"destructive" is not as historically broken or gone as the previous version
said.
The bugs involving resetting from defaults are now understood and partly
documented (the defaults are mis-initialized).
breaks in the vt case to the same places that the man(1) puts then in
the SYNOPSIS. This was already done for the syscons case. Man pages
can't depend on the driver, and the SYNOPSIS is hard-coded for syscons
except for -f where it is hard-coded for vt. The usage message reverses
this for sc. The only other differences are whitespace and removing
-[dL] and -l for vt.
capabilities.
Most of the capabilities (all of the arcane ones) were in FreeBSD-2.0.5,
but were harder to use then, and vidcontrol didn't try. FreeBSD-4.1.0
added per-vty support, fixed the destructivness of the "destructive"
cursor, and improved APIs. Start using the new APIs, support all of
their capabilities, and document all of the capabilities and some of
the historical mistakes.
vt doesn't support any of this before or after the change.
Fix minor unrelated bitrot in the usage message for the syscons case.
sequence "ESC [ %d A" for this although that was used here. I will fix
teken later, but use the more portable ioctl KDSBORDER here.
The ioctl is also much easier to use if you check that it works. For
-b, check it and complain and exit if it failed, so that it is more
obvious that that vt doesn't support border colors. Don't check it
when restoring the border color in revert(), since revert() is used
on vt for handling other errors.
Fix nearby error handling and style. For the error of an invalid
color, revert() and print a specific error message using err() instead
of not revert()ing and printing spam using usage().
This variable was used 4 times in 1 function and all uses were wrong.
The 4 uses were in he test_frame() (show) function, to try to restore
4 colors, 2 unnecessarily and these 2 now broken. This was wrong
because it is the previous colors that must be restored, but the global
holds the original colors. Excessive setting of colors at the end
restored the previous colors correctly in most cases, but I removed
this a couple of revisions ago.
Originally, this variable had 1 correct use, to test for being on a vty
as a side effect of initializing it. This is now down in init(), and
init() also leaves a better-named global with the same contents.
Fix this by reading the current console info into a local variable in
test_frame(), as is done for several other functions. Fix style bugs
in this reading for all callers:
- extra blank lines
- all error messages different. The first one now in init() is not as
specific as the old one, but it is after a different specific one for
another ioctl and is unlikely to be reached when the first ioctl
succeeds. Ones after the first are to repeat the ioctl, so are even
more likely to be reached. The correctness of full removal of the
old global depends on the error handling for failure to initialize
it being unreachable.
- err() instead of warn() for failure in load_font(). This is almost
unreachable, and it makes no sense to continue after undoing previous
changes with revert().
- unreachable return after err() for failure in dump_screen().
Undo large renaming of local variables from the good name 'info' to the
bad name _info, which was done to protect the buggy global's bad name
from -Wshadow warnings.
Change 25 uses of errc() to err(). 2 of these were correct. 23 used
errno for the arg so were just a verbose spelling of err(). 5 of these
were just style bugs, and 18 depended on revert() saving errno.
1 warn() also depended on revert() saving errno.
Remove 2 warnx()'s that duplicate the message from a later errx().
These used to be before returns, and should have reported errno in
some cases. errno is also not reported for for openguess() failures.
Only "restore" the video mode in revert() if the mode was just set
(necessarily partially). Setting the mode to its current setting
doesn't "restore" it, but resets it, with the least harmful change
being to clear the screen. revert() is called even for some harmless
syntax errors and usually did nothing except reset the mode. Now it
usually does nothing. The only things that it tries to restore apart
from the mode are the active vty number, the screen map, 2 colors that
only need to be restored (only after a mode change) to fix kernel bugs,
and 3 colors that can't be restored due to kernel bugs. (This is
mostly for sc, since vt doesn't support mode changes.)
revert() is not called for syntax and setting errors after [mode], so
the mode reset is only done for failures to set raster mode after
setting graphics mode. normal colors can only be set after [mode],
and that is why reverting them should be unnecessary.
r146736 added an undocumented syntax and many bugs handling it. The
documented syntax is "... [mode] [fg [bg]] [show]", where it is critical
for reducing ambiguity and keeping things simple that the mode is
parsed first. r146736 added buggy support for "... [mode] [fg [bg]]
[show] [mode] [fg [bg]]". One error was that after for failing to set
a partially-supported graphics mode, argv[optind] remains pointing to
the mode so doesn't match the first [fg [bg]], so the setting is
attempted again, with slightly worse error handling.
Fix this by removing it (support for the trailing '[mode] [fg [bg]]')
and cleaning up. The cleanups are mostly to remove convolutions and
bugs that didn't work to handle the ambiguous syntax '[fg [bg]] [fg [bg]]'
when [mode] and [show] are not present. Globals were set to allow
repeating the color settings at the end. The functions that set the
colors earlier were misnamed from set* to get*. All that they "got" is
is settings from argv. They applied the settings to the kernel and
the globals.
Fix restoration of colors in revert() by restoring 2 after the mode
change. Colors should not need to be restored, but a bug in scteken
clobbers them on any mode change, including ones for restoration. Don't
move the restoration of the other 3. Teken doesn't clobber them on
mode changes because it doesn't support them at all (sc still supports
the border color, but only using a non-teken ioctl).
Add restoration of colors after a successful mode change to work around
the scteken bug there too. The bug was previously masked by the general
setting of colors at the end.
Fix a longstanding parsing/error handling bug by exiting almost immediately
after matching the [mode] arg but failing to set the mode. Just revert
if necessary. Don't return to continue parsing but do it wrong. This
bug caused spamming the output with a usage() message and exiting with
status 1 whenever [mode] is not present bug [fg [bg]] or [show]. The
exit code 1 was actualy an ambiguous internal code for failure to match
[mode] or failure to set [mode]. This 1 was obfuscated by spelling it
EXIT_FAILURE, but actual exit codes spell EXIT_FAILURE as 1. Remove
another global which could have been used to disambiguate this but was
only used to micro-optimize the (unnecessary except for other bugs)
setting of colors at the end.
attempts to keep them that way. The bg brightness bit is interpreted
as blinking in some modes, but it would barely be useful to disallow
setting it when it would give blinking in code which knew when that
is. The old code mostly knew this wrong, and added handling errors.
It is in fact impossible to know, since future mode switches may
change the meaning of the bit many times on the screen and in history.
Old versions of vidcontrol disallowed bg color numbers >= 8 in all
cases. This is very VGA/syscons-centric. Syscons uses the VGA defaults
of blinking fg instead of bright bg in text mode and bright bg in
graphics mode. On VGA, this is very easy to toggle at any time, and
vt blows away the VGA text mode default at boot time.
r146736 changed this to try to allow bg color numbers in graphics mode
only. This is even more VGA/syscons-centric, and there are many bugs
in this, and many nearby bugs in the parser. These are increased or
decreased by differences and bugs in vt and teken.
Perhaps the most obvious bug was that almost any vidcontrol command
which changes any color or the mode causes an error if the initial fg
color is bright. E.g., in syscons text mode, after "vidcontrol
lightwhite" to make the fg bright, another "vidcontrol lightwhite" is
rejected and buggy fixup code changes the fg to white. This is because
the bright fg color creates a bright bg color for the phantom reverse
video attribute, so was rejected. (The reverse video attribute is
phantom because teken ignores the user's setting of it and simply
reverses the fg attributes to create the bg attributes. Sometimes
some layer masks off the brightness/blinking bit, but not here.)
Perhaps the next most obvious one was that "vidcontrol lightgreen
lightblue" was misparsed as 2 settings of the fg instead of 1 setting
of the fg and 1 invalid setting of the bg. This is because the
parser supports an undocumented syntax with many parsing bugs (an
ambiguity gives this one).
I recently fix bugs in teken that broke setting of bright fg's and
bg's in the normal way. This gave more settings of then, so the old
bugs showed up more often.
to be used with eg "vidcontrol -s".
Reviewed by: emaste@
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D4968
Off by default, build behaves normally.
WITH_META_MODE we get auto objdir creation, the ability to
start build from anywhere in the tree.
Still need to add real targets under targets/ to build packages.
Differential Revision: D2796
Reviewed by: brooks imp
vt(4) has a stub CONS_MODEINFO ioctl that does not provide any data
but returns success. This needs to be fixed in the kernel, but address
it in vidcontrol(1) as well in case it's run on an older kernel.
Reviewed by: bde
Sponsored by: The FreeBSD Foundation
r273544 changed the -f option allow no arguments in vt mode (used to
reset the font back to the default), but broke the optionality of the
size argument for syscons. Drop the required argument from syscons'
optstring for -f so the optional argument handler works the same way
for both syscons and vt.
Reported by: bde
Sponsored by: The FreeBSD Foundation
To restore the default font using vidcontrol(1), use the "-f" flag
without an argument:
vidcontrol -f < /dev/ttyv0
PR: 193910
Differential Revision: https://reviews.freebsd.org/D971
Submitted by: Marcin Cieslak <saper@saper.info>
Reviewed by: ray@, emaste@
Approved by: ray@
MFC after: 1 week
As sc(4) and vt(4) coexist and are both enabled in GENERIC, the existence
of a vt(4) sysctl is not sufficient to determine that vt(4) is in use.
Reported by: Trond Endrestøl
o Teach vidcontrol(1) to distinct which virtual terminal system is running now.
o Load vt(4) fonts from different location.
o Add $FreeBSD$ tag for path.h.
Tested by: Claude Buisson <clbuisson@orange.fr>
MFC after: 7 days
Sponsored by: The FreeBSD Foundation
Permit its use in vidcontrol -i
PR: bin/119483
Submitted by: Dan Lukes <dan@obluda.cz>
Arrival-Date: Wed Jan 09 10:30:01 UTC 2008
Reviewed by: ed
MFC after: 3 days
In addition to adding `static' where possible:
- bin/date: Move `retval' into extern.h to make it visible to date.c.
- bin/ed: Move globally used variables into ed.h.
- sbin/camcontrol: Move `verbose' into camcontrol.h and fix shadow warnings.
- usr.bin/calendar: Remove unneeded variables.
- usr.bin/chat: Make `line' local instead of global.
- usr.bin/elfdump: Comment out unneeded function.
- usr.bin/rlogin: Use _Noreturn instead of __dead2.
- usr.bin/tset: Pull `Ospeed' into extern.h.
- usr.sbin/mfiutil: Put global variables in mfiutil.h.
- usr.sbin/pkg: Remove unused `os_corres'.
- usr.sbin/quotaon, usr.sbin/repquota: Remove unused `qfname'.
video mode change always reset terminal mode to xterm.
It allows things like 'vidcontrol -T cons25 80x30' works as supposed,
and allows 'allscreens_flags="-T cons25 80x30"' in /etc/rc.conf too.
MFC after: 1 week
While there, remove the false optimisation of the colors array. It seems
that changing it to an array of pointers instead of a 16x16 array does
not cause any increase in binary size at all.
