739 lines
16 KiB
Groff
739 lines
16 KiB
Groff
.\"
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.\" vidcontrol - a utility for manipulating the syscons or vt video driver
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" @(#)vidcontrol.1
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.\" $FreeBSD$
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.\"
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.Dd April 6, 2022
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.Dt VIDCONTROL 1
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.Os
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.Sh NAME
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.Nm vidcontrol
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.Nd system console control and configuration utility
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.Sh SYNOPSIS
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.Nm
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.Op Fl CdHLPpx
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.Op Fl b Ar color
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.Op Fl c Ar appearance
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.Op Fl E Ar emulator
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.Oo
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.Fl f
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.Oo
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.Op Ar size
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.Ar file
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.Oc
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.Oc
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.Op Fl g Ar geometry
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.Op Fl h Ar size
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.Op Fl i Cm active | adapter | mode
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.Op Fl l Ar screen_map
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.Op Fl M Ar char
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.Op Fl m Cm on | off
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.Op Fl r Ar foreground Ar background
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.Op Fl S Cm on | off
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.Op Fl s Ar number
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.Op Fl T Cm xterm | cons25
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.Op Fl t Ar N | Cm off
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.Op Ar mode
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.Op Ar foreground Op Ar background
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.Op Cm show
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.Sh DESCRIPTION
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The
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.Nm
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utility is used to set various options for the
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.Xr syscons 4
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or
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.Xr vt 4
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console driver,
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such as video mode, colors, cursor shape, screen output map, font, and screen
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saver timeout.
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Only a small subset of options is supported by
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.Xr vt 4 .
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Unsupported options lead to error messages, typically including
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the text "Inappropriate ioctl for device".
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.Pp
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The following command line options are supported:
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.Bl -tag -width indent
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.It Ar mode
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Select a new video mode.
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The modes currently recognized are:
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.Ar 80x25 ,
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.Ar 80x30 ,
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.Ar 80x43 ,
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.Ar 80x50 ,
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.Ar 80x60 ,
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.Ar 132x25 ,
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.Ar 132x30 ,
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.Ar 132x43 ,
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.Ar 132x50 ,
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.Ar 132x60 ,
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.Ar VGA_40x25 ,
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.Ar VGA_80x25 ,
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.Ar VGA_80x30 ,
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.Ar VGA_80x50 ,
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.Ar VGA_80x60 ,
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.Ar VGA_90x25 ,
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.Ar VGA_90x30 ,
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.Ar VGA_90x43 ,
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.Ar VGA_90x50 ,
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.Ar VGA_90x60 ,
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.Ar EGA_80x25 ,
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.Ar EGA_80x43 ,
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.Ar VESA_132x25 ,
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.Ar VESA_132x43 ,
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.Ar VESA_132x50 ,
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.Ar VESA_132x60 .
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.\"The graphic mode
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.\".Ar VGA_320x200
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.\"and
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The raster text mode
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.Ar VESA_800x600
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can also be chosen.
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Alternatively, a mode can be specified with its number by using a mode name of
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the form
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.Li MODE_ Ns Aq Ar NUMBER .
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A list of valid mode numbers can be obtained with the
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.Fl i Cm mode
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option.
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See
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.Sx Video Mode Support
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below.
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.It Ar foreground Op Ar background
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Change colors when displaying text.
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Specify the foreground color
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(e.g.,
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.Dq vidcontrol white ) ,
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or both a foreground and background colors
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(e.g.,
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.Dq vidcontrol yellow blue ) .
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Use the
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.Cm show
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command below to see available colors.
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.It Cm show
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See the supported colors on a given platform.
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.It Fl b Ar color
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Set border color to
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.Ar color .
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This option may not be always supported by the video driver.
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.It Fl C
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Clear the history buffer.
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.It Fl c Ar setting Ns Op , Ns Ar setting ...
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Change the cursor appearance.
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The change is specified by a non-empty comma-separated list of
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.Ar setting Ns s .
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Each
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.Ar setting
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overrides or modifies previous ones in left to right order.
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.Pp
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The following override
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.Ar setting Ns s
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are available:
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.Bl -tag -width indent
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.It Cm normal
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Set to a block covering 1 character cell,
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with a configuration-dependent coloring
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that should be at worst inverse video.
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.It Cm destructive
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Set to a blinking sub-block with
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.Cm height
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scanlines starting at
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.Cm base .
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The name
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.Dq destructive
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is bad for backwards compatibility.
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This
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.Ar setting
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should not force destructiveness,
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and it now only gives destructiveness in some
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configurations (typically for hardware cursors
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in text mode).
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Blinking limits destructiveness.
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This
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.Ar setting
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should now be spelled
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.Cm normal , Ns Cm blink , Ns Cm noblock .
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A non-blinking destructive cursor would be unusable,
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so old versions of
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.Nm
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did not support it,
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and this version does not have an override for it.
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.It Cm base Ns = Ns Ar value , Cm height Ns = Ns Ar value
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Set the specified scanline parameters.
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These parameters are only active in
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.Cm noblock
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mode.
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.Cm value
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is an integer in any base supported by
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.Xr strtol 3 .
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Setting
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.Cm height
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to 0 turns off the cursor in
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.Cm noblock
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mode.
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Negative
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.Ar value Ns s
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are silently ignored.
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Positive
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.Ar value Ns s
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are clamped to fit in the character cell when the cursor is drawn.
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.El
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.Pp
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The following modifier
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.Ar setting Ns s
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are available:
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.Bl -tag -width indent
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.It Cm blink , noblink
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Set or clear the blinking attribute.
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This is not quite backwards compatible.
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In old versions of
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.Nm , Cm blink
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was an override to a blinking block.
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.It Cm block , noblock
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Set or clear the
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.Cm block
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attribute.
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This attribute is the inverse of the flag
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.Dv CONS_CHAR_CURSOR
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in the implementation.
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It deactivates the scanline parameters,
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and expresses a preference for using a
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simpler method of implementation.
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Its inverse does the opposite.
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When the scanline parameters give a full block,
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this attribute reduces to a method selection bit.
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The
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.Cm block
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method tends to give better coloring.
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.It Cm hidden , nohidden
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Set or clear the hidden attribute.
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.El
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.Pp
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The following (non-sticky) flags control application of the
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.Ar setting Ns s :
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.Bl -tag -width indent
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.It Cm charcolors
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Apply
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.Cm base
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and
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.Cm height
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to the (character) cursor's list of preferred colors instead of its shape.
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Beware that the color numbers are raw VGA palette indexes,
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not ANSI color numbers.
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The indexes are reduced mod 8, 16 or 256,
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or ignored,
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depending on the video mode and renderer.
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.It Cm mousecolors
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Colors for the mouse cursor in graphics mode.
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Like
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.Cm charcolors ,
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except there is no preference or sequence;
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.Cm base
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gives the mouse border color and
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.Cm height
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gives the mouse interior color.
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|
Together with
|
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.Cm charcolors ,
|
|
this gives 2 selection bits which select between
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only 3 of 4 sub-destinations of the 4 destinations selected by
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.Cm default
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and
|
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.Cm local
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(by ignoring
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.Cm mousecolors
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if
|
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.Cm charcolors
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is also set).
|
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.It Cm default
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Apply the changes to the default settings and then to the active settings,
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instead of only to the active settings.
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Together with
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.Cm local ,
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this gives 2 selection bits which select between 4 destinations.
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.It Cm shapeonly
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Ignore any changes to the
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.Cm block
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and
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.Cm hidden
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attributes.
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.It Cm local
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Apply the changes to the current vty.
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The default is to apply them to a global place
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and copy from there to all vtys.
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.It Cm reset
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Reset everything.
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The default is to not reset.
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When the
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.Cm local
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parameter is specified, the current local settings are reset
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to default local settings.
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Otherwise, the current global settings are reset to default
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global settings and then copied to the current and default
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settings for all vtys.
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.It Cm show
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Show the current changes.
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.El
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.It Fl d
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Print out current output screen map.
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.It Fl E Ar emulator
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Set the terminal emulator to
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.Ar emulator .
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.It Fl e
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Show the active and available terminal emulators.
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.It Xo
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.Fl f
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.Oo
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.Op Ar size
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.Ar file
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.Oc
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.Xc
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Load font
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.Ar file
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for
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.Ar size
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(currently, only
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.Cm 8x8 ,
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.Cm 8x14
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or
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.Cm 8x16 ) .
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The font file can be either uuencoded or in raw binary format.
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You can also use the menu-driven
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.Xr vidfont 1
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command to load the font of your choice.
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.Pp
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.Ar Size
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may be omitted, in this case
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.Nm
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will try to guess it from the size of font file.
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.Pp
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When using
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.Xr vt 4
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both
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.Ar size
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and
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.Ar file
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can be omitted, and the default font will be loaded.
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.Pp
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Note that older video cards, such as MDA and CGA, do not support
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software font.
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See also
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.Sx Video Mode Support
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and
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.Sx EXAMPLES
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below and the man page for either
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.Xr syscons 4
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or
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.Xr vt 4
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(depending on which driver you use).
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.It Fl g Ar geometry
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Set the
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.Ar geometry
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of the text mode for the modes with selectable
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geometry.
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|
Currently only raster modes, such as
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.Ar VESA_800x600 ,
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support this option.
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See also
|
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.Sx Video Mode Support
|
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and
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.Sx EXAMPLES
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below.
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.It Fl h Ar size
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Set the size of the history (scrollback) buffer to
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.Ar size
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lines.
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.It Fl i Cm active
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Shows the active vty number.
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.It Fl i Cm adapter
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Shows info about the current video adapter.
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.It Fl i Cm mode
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Shows the possible video modes with the current video hardware.
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.It Fl l Ar screen_map
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|
Install screen output map file from
|
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.Ar screen_map .
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|
See also
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.Xr syscons 4
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or
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.Xr vt 4
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|
(depending on which driver you use).
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.It Fl L
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Install default screen output map.
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.It Fl M Ar char
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Sets the base character used to render the mouse pointer to
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.Ar char .
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.It Fl m Cm on | off
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Switch the mouse pointer
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.Cm on
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or
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.Cm off .
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|
Used together with the
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.Xr moused 8
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daemon for text mode cut & paste functionality.
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.It Fl p
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Capture the current contents of the video buffer corresponding
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to the terminal device referred to by standard input.
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The
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.Nm
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utility writes contents of the video buffer to the standard
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output in a raw binary format.
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For details about that
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format see
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.Sx Format of Video Buffer Dump
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below.
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Supported only with
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.Xr syscons 4 .
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.It Fl P
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Same as
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.Fl p ,
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|
but dump contents of the video buffer in a plain text format
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ignoring nonprintable characters and information about text
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attributes.
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Supported only with
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.Xr syscons 4 .
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.It Fl H
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When used with
|
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.Fl p
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or
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.Fl P ,
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it instructs
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.Nm
|
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to dump full history buffer instead of visible portion of
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the video buffer only.
|
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.It Fl r Ar foreground background
|
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Change reverse mode colors to
|
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.Ar foreground
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and
|
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.Ar background .
|
|
.It Fl S Cm on | off
|
|
Turn vty switching on or off.
|
|
When vty switching is off,
|
|
attempts to switch to a different virtual terminal will fail.
|
|
(The default is to permit vty switching.)
|
|
This protection can be easily bypassed when the kernel is compiled with
|
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the
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.Dv DDB
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option.
|
|
However, you probably should not compile the kernel debugger on a box which
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is supposed to be physically secure.
|
|
.It Fl s Ar number
|
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Set the active vty to
|
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.Ar number .
|
|
.It Fl T Cm xterm | cons25
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Switch between xterm and cons25 style terminal emulation.
|
|
.It Fl t Ar N | Cm off
|
|
Set the screensaver timeout to
|
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.Ar N
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seconds, or turns it
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.Cm off .
|
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.It Fl x
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Use hexadecimal digits for output.
|
|
.El
|
|
.Ss Video Mode Support
|
|
Note that not all modes listed above may be supported by the video
|
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hardware.
|
|
You can verify which mode is supported by the video hardware, using the
|
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.Fl i Cm mode
|
|
option.
|
|
.Pp
|
|
The VESA BIOS support must be linked to the kernel
|
|
or loaded as a KLD module if you wish to use VESA video modes
|
|
or 132 column modes
|
|
(see
|
|
.Xr vga 4 ) .
|
|
.Pp
|
|
You need to compile your kernel with the
|
|
.Ar VGA_WIDTH90
|
|
option if you wish to use VGA 90 column modes
|
|
(see
|
|
.Xr vga 4 ) .
|
|
.Pp
|
|
Video modes other than 25 and 30 line modes may require specific size of font.
|
|
Use
|
|
.Fl f
|
|
option above to load a font file to the kernel.
|
|
If the required size of font has not been loaded to the kernel,
|
|
.Nm
|
|
will fail if the user attempts to set a new video mode.
|
|
.Pp
|
|
.Bl -column "25 line modes" "8x16 (VGA), 8x14 (EGA)" -compact
|
|
.Sy Modes Ta Sy Font size
|
|
.No 25 line modes Ta 8x16 (VGA), 8x14 (EGA)
|
|
.No 30 line modes Ta 8x16
|
|
.No 43 line modes Ta 8x8
|
|
.No 50 line modes Ta 8x8
|
|
.No 60 line modes Ta 8x8
|
|
.El
|
|
.Pp
|
|
It is better to always load all three sizes (8x8, 8x14 and 8x16)
|
|
of the same font.
|
|
.Pp
|
|
You may set variables in
|
|
.Pa /etc/rc.conf
|
|
or
|
|
.Pa /etc/rc.conf.local
|
|
so that desired font files will be automatically loaded
|
|
when the system starts up.
|
|
See below.
|
|
.Pp
|
|
If you want to use any of the raster text modes you need to recompile your
|
|
kernel with the
|
|
.Dv SC_PIXEL_MODE
|
|
option.
|
|
See
|
|
.Xr syscons 4
|
|
or
|
|
.Xr vt 4
|
|
(depending on which driver you use)
|
|
for more details on this kernel option.
|
|
.Ss Format of Video Buffer Dump
|
|
The
|
|
.Nm
|
|
utility uses the
|
|
.Xr syscons 4
|
|
.\" is it supported on vt(4)???
|
|
or
|
|
.Xr vt 4
|
|
.Dv CONS_SCRSHOT
|
|
.Xr ioctl 2
|
|
to capture the current contents of the video buffer.
|
|
The
|
|
.Nm
|
|
utility writes version and additional information to the standard
|
|
output, followed by the contents of the video buffer.
|
|
.Pp
|
|
VGA video memory is typically arranged in two byte tuples,
|
|
one per character position.
|
|
In each tuple, the first byte will be the character code,
|
|
and the second byte is the character's color attribute.
|
|
.Pp
|
|
The VGA color attribute byte looks like this:
|
|
.Bl -column "X:X" "<00000000>" "width" "bright foreground color"
|
|
.Sy "bits# width meaning"
|
|
.Li "7 <X0000000> 1 character blinking"
|
|
.Li "6:4 <0XXX0000> 3 background color"
|
|
.Li "3 <0000X000> 1 bright foreground color"
|
|
.Li "2:0 <00000XXX> 3 foreground color"
|
|
.El
|
|
.Pp
|
|
Here is a list of the three bit wide base colors:
|
|
.Pp
|
|
.Bl -hang -offset indent -compact
|
|
.It 0
|
|
Black
|
|
.It 1
|
|
Blue
|
|
.It 2
|
|
Green
|
|
.It 3
|
|
Cyan
|
|
.It 4
|
|
Red
|
|
.It 5
|
|
Magenta
|
|
.It 6
|
|
Brown
|
|
.It 7
|
|
Light Grey
|
|
.El
|
|
.Pp
|
|
Base colors with bit 3 (the bright foreground flag) set:
|
|
.Pp
|
|
.Bl -hang -offset indent -compact
|
|
.It 0
|
|
Dark Grey
|
|
.It 1
|
|
Light Blue
|
|
.It 2
|
|
Light Green
|
|
.It 3
|
|
Light Cyan
|
|
.It 4
|
|
Light Red
|
|
.It 5
|
|
Light Magenta
|
|
.It 6
|
|
Yellow
|
|
.It 7
|
|
White
|
|
.El
|
|
.Pp
|
|
For example, the two bytes
|
|
.Pp
|
|
.Dl "65 158"
|
|
.Pp
|
|
specify an uppercase A (character code 65), blinking
|
|
(bit 7 set) in yellow (bits 3:0) on a blue background
|
|
(bits 6:4).
|
|
.Pp
|
|
The
|
|
.Nm
|
|
output contains a small header which includes additional
|
|
information which may be useful to utilities processing
|
|
the output.
|
|
.Pp
|
|
The first 10 bytes are always arranged as follows:
|
|
.Bl -column "Byte range" "Contents" -offset indent
|
|
.It Sy "Byte Range Contents"
|
|
.It "1 - 8 Literal text" Dq Li SCRSHOT_
|
|
.It "9 File format version number"
|
|
.It "10 Remaining number of bytes in the header"
|
|
.El
|
|
.Pp
|
|
Subsequent bytes depend on the version number.
|
|
.Bl -column "Version" "13 and up" -offset indent
|
|
.It Sy "Version Byte Meaning"
|
|
.It "1 11 Terminal width, in characters"
|
|
.It " 12 Terminal depth, in characters"
|
|
.It " 13 and up The snapshot data"
|
|
.El
|
|
.Pp
|
|
So a dump of an 80x25 screen would start (in hex)
|
|
.Bd -literal -offset indent
|
|
53 43 52 53 48 4f 54 5f 01 02 50 19
|
|
----------------------- -- -- -- --
|
|
| | | | ` 25 decimal
|
|
| | | `--- 80 decimal
|
|
| | `------ 2 remaining bytes of header data
|
|
| `--------- File format version 1
|
|
`------------------------ Literal "SCRSHOT_"
|
|
.Ed
|
|
.Sh VIDEO OUTPUT CONFIGURATION
|
|
.Ss Boot Time Configuration
|
|
You may set the following variables in
|
|
.Pa /etc/rc.conf
|
|
or
|
|
.Pa /etc/rc.conf.local
|
|
in order to configure the video output at boot time.
|
|
.Pp
|
|
.Bl -tag -width foo_bar_var -compact
|
|
.It Ar blanktime
|
|
Sets the timeout value for the
|
|
.Fl t
|
|
option.
|
|
.It Ar font8x16 , font8x14 , font8x8
|
|
Specifies font files for the
|
|
.Fl f
|
|
option.
|
|
.It Ar scrnmap
|
|
Specifies a screen output map file for the
|
|
.Fl l
|
|
option.
|
|
.El
|
|
.Pp
|
|
See
|
|
.Xr rc.conf 5
|
|
for more details.
|
|
.Ss Driver Configuration
|
|
The video card driver may let you change default configuration
|
|
options, such as the default font, so that you do not need to set up
|
|
the options at boot time.
|
|
See video card driver manuals, (e.g.,
|
|
.Xr vga 4 )
|
|
for details.
|
|
.Sh FILES
|
|
.Bl -tag -width /usr/share/syscons/scrnmaps/foo-bar -compact
|
|
.It Pa /usr/share/syscons/fonts/*
|
|
.It Pa /usr/share/vt/fonts/*
|
|
font files.
|
|
.It Pa /usr/share/syscons/scrnmaps/*
|
|
screen output map files (relevant for
|
|
.Xr syscons 4
|
|
only).
|
|
.El
|
|
.Sh EXAMPLES
|
|
If you want to load
|
|
.Pa /usr/share/syscons/fonts/iso-8x16.fnt
|
|
to the kernel, run
|
|
.Nm
|
|
as:
|
|
.Pp
|
|
.Dl vidcontrol -f 8x16 /usr/share/syscons/fonts/iso-8x16.fnt
|
|
.Pp
|
|
So long as the font file is in
|
|
.Pa /usr/share/syscons/fonts
|
|
(if using syscons) or
|
|
.Pa /usr/share/vt/fonts
|
|
(if using vt),
|
|
you may abbreviate the file name as
|
|
.Pa iso-8x16 :
|
|
.Pp
|
|
.Dl vidcontrol -f 8x16 iso-8x16
|
|
.Pp
|
|
Furthermore, you can also omit font size
|
|
.Dq Li 8x16 :
|
|
.Pp
|
|
.Dl vidcontrol -f iso-8x16
|
|
.Pp
|
|
Moreover, the suffix specifying the font size can also be omitted; in
|
|
this case,
|
|
.Nm
|
|
will use the size of the currently displayed font to construct the
|
|
suffix:
|
|
.Pp
|
|
.Dl vidcontrol -f iso
|
|
.Pp
|
|
Likewise, you can also abbreviate the screen output map file name for
|
|
the
|
|
.Fl l
|
|
option if the file is found in
|
|
.Pa /usr/share/syscons/scrnmaps .
|
|
.Pp
|
|
.Dl vidcontrol -l iso-8859-1_to_cp437
|
|
.Pp
|
|
The above command will load
|
|
.Pa /usr/share/syscons/scrnmaps/iso-8859-1_to_cp437.scm .
|
|
.Pp
|
|
The following command will set-up a 100x37 raster text mode (useful for
|
|
some LCD models):
|
|
.Pp
|
|
.Dl vidcontrol -g 100x37 VESA_800x600
|
|
.Pp
|
|
The following command will capture the contents of the first virtual
|
|
terminal video buffer, and redirect the output to the
|
|
.Pa shot.scr
|
|
file:
|
|
.Pp
|
|
.Dl vidcontrol -p < /dev/ttyv0 > shot.scr
|
|
.Pp
|
|
The following command will dump contents of the fourth virtual terminal
|
|
video buffer
|
|
to the standard output in the human readable format:
|
|
.Pp
|
|
.Dl vidcontrol -P < /dev/ttyv3
|
|
.Sh SEE ALSO
|
|
.Xr kbdcontrol 1 ,
|
|
.Xr vidfont 1 ,
|
|
.Xr keyboard 4 ,
|
|
.Xr screen 4 ,
|
|
.Xr syscons 4 ,
|
|
.Xr vga 4 ,
|
|
.Xr vt 4 ,
|
|
.Xr rc.conf 5 ,
|
|
.Xr kldload 8 ,
|
|
.Xr moused 8 ,
|
|
.Xr watch 8
|
|
.Pp
|
|
The various
|
|
.Pa scr2*
|
|
utilities in the
|
|
.Pa graphics
|
|
and
|
|
.Pa textproc
|
|
categories of the
|
|
.Em "Ports Collection" .
|
|
.Sh AUTHORS
|
|
.An S\(/oren Schmidt Aq Mt sos@FreeBSD.org
|
|
.An Sascha Wildner Aq Mt saw@online.de
|
|
.Sh CONTRIBUTORS
|
|
.An -split
|
|
.An Maxim Sobolev Aq Mt sobomax@FreeBSD.org
|
|
.An Nik Clayton Aq Mt nik@FreeBSD.org
|