589b4db814
1) Removed the low-level (unneeded in this context) details on
escape sequences that are already documented in screen(4).
2) Removed whitespace at EOL.
3) Removed the garbage from previous revision.
503 lines
11 KiB
Groff
503 lines
11 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, 2001
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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 CdLPpx
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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 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 Cm size
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Set the size of the history (scrollback) buffer to
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.Cm 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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.Nm
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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 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 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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.Nm
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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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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 forth virtual terminal
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to the standard output in the human readable format:
|
|
.Pp
|
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.Dl vidcontrol -P < /dev/ttyv3
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.Sh SEE ALSO
|
|
.Xr kbdcontrol 1 ,
|
|
.Xr vidfont 1 ,
|
|
.Xr keyboard 4 ,
|
|
.Xr screen 4 ,
|
|
.Xr syscons 4 ,
|
|
.Xr vga 4 ,
|
|
.Xr rc.conf 5 ,
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.Xr kldload 8 ,
|
|
.Xr moused 8 ,
|
|
.Xr watch 8
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|
.Pp
|
|
The various
|
|
.Li scr2*
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|
utilities in the
|
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.Li graphics
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|
and
|
|
.Li textproc
|
|
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
|