534 lines
12 KiB
Groff
534 lines
12 KiB
Groff
.\"
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.\" vidcontrol - a utility for manipulating the syscons 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 May 27, 2002
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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 CdLHPpx
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.Op Fl b Ar color
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.Op Fl c Ar appearance
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.Oo
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.Fl f
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.Op Ar size
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.Ar file
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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 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 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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command is used to set various options for the
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.Xr syscons 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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.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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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 Cm normal | blink | destructive
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Change the cursor appearance.
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The cursor is either an inverting block
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.Pq Cm normal
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that can optionally
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.Cm blink ,
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or it can be like the old hardware cursor
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.Pq Cm destructive .
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The latter is actually a simulation.
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.It Fl d
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Print out current output screen map.
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.It Xo
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.Fl f
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.Op Ar size
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.Ar file
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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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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
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.Xr syscons 4 .
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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 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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.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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.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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.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 .
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.It Fl S Cm on | off
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Turn vty switching on or off.
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When vty switching is off,
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attempts to switch to a different virtual terminal will fail.
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(The default is to permit vty switching.)
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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.
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However, you probably should not compile the kernel debugger on a box which
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is supposed to be physically secure.
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.It Fl s Ar number
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Set the current vty to
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.Ar number .
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.It Fl t Ar N | Cm off
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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.
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.El
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.Ss Video Mode Support
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Note that not all modes listed above may be supported by the video
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hardware.
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You can verify which mode is supported by the video hardware, using the
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.Fl i Cm mode
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option.
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.Pp
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The VESA BIOS support must be linked to the kernel
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or loaded as a KLD module if you wish to use VESA video modes
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or 132 column modes
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(see
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.Xr vga 4 ) .
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.Pp
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You need to compile your kernel with the
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.Ar VGA_WIDTH90
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option if you wish to use VGA 90 column modes
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(see
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.Xr vga 4 ) .
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.Pp
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Video modes other than 25 and 30 line modes may require specific size of font.
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Use
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.Fl f
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option above to load a font file to the kernel.
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If the required size of font has not been loaded to the kernel,
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.Nm
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will fail if the user attempts to set a new video mode.
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.Pp
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.Bl -column "25 line modes" "8x16 (VGA), 8x14 (EGA)" -compact
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.Sy Modes Ta Sy Font size
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.Li 25 line modes Ta 8x16 (VGA), 8x14 (EGA)
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.Li 30 line modes Ta 8x16
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.Li 43 line modes Ta 8x8
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.Li 50 line modes Ta 8x8
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.Li 60 line modes Ta 8x8
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.El
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.Pp
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It is better to always load all three sizes (8x8, 8x14 and 8x16)
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of the same font.
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.Pp
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You may set variables in
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.Pa /etc/rc.conf
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or
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.Pa /etc/rc.conf.local
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so that desired font files will be automatically loaded
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when the system starts up.
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See below.
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.Pp
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If you want to use the raster text mode
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.Ar VESA_800x600 ,
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you need to recompile your kernel with the
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.Dv SC_PIXEL_MODE
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option.
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See
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.Xr syscons 4
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for more details on this kernel option.
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.Ss Format of Video Buffer Dump
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The
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.Nm
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utility uses the
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.Xr syscons 4
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.Dv CONS_SCRSHOT
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.Xr ioctl 2
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to capture the current contents of the video buffer.
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The
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.Nm
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utility writes version and additional information to the standard
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output, followed by the contents of the terminal device.
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.Pp
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VGA video memory is typically arranged in two byte tuples,
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one per character position.
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In each tuple, the first byte will be the character code,
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and the second byte is the character's color attribute.
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.Pp
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The VGA color attribute byte looks like this:
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.Pp
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.Bl -column "X:X" "<00000000>" "width" "bright foreground color"
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.Sy "bits# width meaning"
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.Li "7 <X0000000> 1 character blinking"
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.Li "6:4 <0XXX0000> 3 background color"
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.Li "3 <0000X000> 1 bright foreground color"
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.Li "2:0 <00000XXX> 3 foreground color"
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.El
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.Pp
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Here is a list of the three bit wide base colors:
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.Pp
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.Bl -hang -offset indent -compact
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.It 0
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Black
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.It 1
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Blue
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.It 2
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Green
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.It 3
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Cyan
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.It 4
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Red
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.It 5
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Magenta
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.It 6
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Brown
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.It 7
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Light Grey
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.El
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.Pp
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Base colors with bit 3 (the bright foreground flag) set:
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.Pp
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.Bl -hang -offset indent -compact
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.It 0
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Dark Grey
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.It 1
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Light Blue
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.It 2
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Light Green
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.It 3
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Light Cyan
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.It 4
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Light Red
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.It 5
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Light Magenta
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.It 6
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Yellow
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.It 7
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White
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.El
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.Pp
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For example, the two bytes
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.Pp
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.Dl "65 158"
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.Pp
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specify an uppercase A (character code 65), blinking
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(bit 7 set) in yellow (bits 3:0) on a blue background
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(bits 6:4).
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.Pp
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The
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.Nm
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output contains a small header which includes additional
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information which may be useful to utilities processing
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the output.
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.Pp
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The first 10 bytes are always arranged as follows:
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.Bl -column "Byte range" "Contents" -offset indent
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.It Sy "Byte Range Contents"
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.It "1 thru 8 Literal text" Dq Li SCRSHOT_
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.It "9 File format version number"
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.It "10 Remaining number of bytes in the header"
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.El
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.Pp
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Subsequent bytes depend on the version number.
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.Bl -column "Version" "13 and up" -offset indent
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.It Sy "Version Byte Meaning"
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.It "1 11 Terminal width, in characters"
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.It " 12 Terminal depth, in characters"
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.It " 13 and up The snapshot data"
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.El
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.Pp
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So a dump of an 80x25 screen would start (in hex)
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.Bd -literal -offset indent
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53 43 52 53 48 4f 54 5f 01 02 50 19
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----------------------- -- -- -- --
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| | | | ` 25 decimal
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| | | `--- 80 decimal
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| | `------ 2 remaining bytes of header data
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| `--------- File format version 1
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`------------------------ Literal "SCRSHOT_"
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.Ed
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.Sh VIDEO OUTPUT CONFIGURATION
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.Ss Boot Time Configuration
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You may set the following variables in
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.Pa /etc/rc.conf
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or
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.Pa /etc/rc.conf.local
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in order to configure the video output at boot time.
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.Pp
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.Bl -tag -width foo_bar_var -compact
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.It Ar blanktime
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Sets the timeout value for the
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.Fl t
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option.
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.It Ar font8x16 , font8x14 , font8x8
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Specifies font files for the
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.Fl f
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option.
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.It Ar scrnmap
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Specifies a screen output map file for the
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.Fl l
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option.
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.El
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.Pp
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See
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.Xr rc.conf 5
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for more details.
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.Ss Driver Configuration
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The video card driver may let you change default configuration
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options, such as the default font, so that you do not need to set up
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the options at boot time.
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See video card driver manuals, (e.g.\&
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.Xr vga 4 )
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for details.
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.Sh FILES
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.Bl -tag -width /usr/share/syscons/scrnmaps/foo-bar -compact
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.It Pa /usr/share/syscons/fonts/*
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font files.
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.It Pa /usr/share/syscons/scrnmaps/*
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screen output map files.
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.El
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.Sh EXAMPLES
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If you want to load
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.Pa /usr/share/syscons/fonts/iso-8x16.fnt
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to the kernel, run
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.Nm
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as:
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.Pp
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.Dl vidcontrol -f 8x16 /usr/share/syscons/fonts/iso-8x16.fnt
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.Pp
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So long as the font file is in
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.Pa /usr/share/syscons/fonts ,
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you may abbreviate the file name as
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.Pa iso-8x16 :
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.Pp
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.Dl vidcontrol -f 8x16 iso-8x16
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.Pp
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Furthermore, you can also omit font size
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.Dq Li 8x16 :
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.Pp
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.Dl vidcontrol -f iso-8x16
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.Pp
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Moreover, the suffix specifying the font size can be also omitted; in
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this case,
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.Nm
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will use the size of the currently displayed font to construct the
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suffix:
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.Pp
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.Dl vidcontrol -f iso
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.Pp
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Likewise, you can also abbreviate the screen output map file name for
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the
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.Fl l
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option if the file is found in
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.Pa /usr/share/syscons/scrnmaps .
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.Pp
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.Dl vidcontrol -l iso-8859-1_to_cp437
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.Pp
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The above command will load
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.Pa /usr/share/syscons/scrnmaps/iso-8859-1_to_cp437.scm .
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.Pp
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The following command will set-up a 100x37 raster text mode (useful for
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some LCD models):
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.Pp
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.Dl vidcontrol -g 100x37 VESA_800x600
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.Pp
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The following command will capture the contents of the first virtual
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terminal, and redirect the output to the
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.Pa shot.scr
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file:
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.Pp
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.Dl vidcontrol -p < /dev/ttyv0 > shot.scr
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.Pp
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The following command will dump contents of the fourth virtual terminal
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to the standard output in the human readable format:
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.Pp
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.Dl vidcontrol -P < /dev/ttyv3
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.Sh SEE ALSO
|
|
.Xr kbdcontrol 1 ,
|
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.Xr vidfont 1 ,
|
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.Xr keyboard 4 ,
|
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.Xr screen 4 ,
|
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.Xr syscons 4 ,
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.Xr vga 4 ,
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.Xr rc.conf 5 ,
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.Xr kldload 8 ,
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.Xr moused 8 ,
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.Xr watch 8
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.Pp
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The various
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.Li scr2*
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utilities in the
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.Li graphics
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and
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.Li textproc
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categories of the
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.Em "Ports Collection" .
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.Sh AUTHORS
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.An S\(/oren Schmidt Aq sos@FreeBSD.org
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.Sh CONTRIBUTORS
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.An Maxim Sobolev Aq sobomax@FreeBSD.org ,
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.An Nik Clayton Aq nik@FreeBSD.org
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