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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 19:41:07 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 19:41:07 +0000
commit3af6d22bb3850ab2bac67287e3a3d3b0e32868e5 (patch)
tree3ee7a3ec64525911fa865bb984c86d997d855527 /man4/vcs.4
parentAdding debian version 6.05.01-1. (diff)
downloadmanpages-3af6d22bb3850ab2bac67287e3a3d3b0e32868e5.tar.xz
manpages-3af6d22bb3850ab2bac67287e3a3d3b0e32868e5.zip
Merging upstream version 6.7.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--man4/vcs.430
1 files changed, 15 insertions, 15 deletions
diff --git a/man4/vcs.4 b/man4/vcs.4
index 3aa3523..bf5dba2 100644
--- a/man4/vcs.4
+++ b/man4/vcs.4
@@ -7,7 +7,7 @@
.\" 2007-12-17, Samuel Thibault <samuel.thibault@ens-lyon.org>:
.\" document the VT_GETHIFONTMASK ioctl
.\" "
-.TH vcs 4 2023-05-03 "Linux man-pages 6.05.01"
+.TH vcs 4 2023-10-31 "Linux man-pages 6.7"
.SH NAME
vcs, vcsa \- virtual console memory
.SH DESCRIPTION
@@ -16,7 +16,7 @@ is a character device with major number 7 and minor number
0, usually with mode 0644 and ownership root:tty.
It refers to the memory of the currently
displayed virtual console terminal.
-.PP
+.P
.I /dev/vcs[1\-63]
are character devices for virtual console
terminals, they have major number 7 and minor number 1 to 63, usually
@@ -36,7 +36,7 @@ dimensions and cursor position:
=
.I y
= 0 at the top left corner of the screen.)
-.PP
+.P
When a 512-character font is loaded,
the 9th bit position can be fetched by applying the
.BR ioctl (2)
@@ -50,16 +50,16 @@ the value is returned in the
pointed to by the third
.BR ioctl (2)
argument.
-.PP
+.P
These devices replace the screendump
.BR ioctl (2)
operations of
.BR ioctl_console (2),
so the system
administrator can control access using filesystem permissions.
-.PP
+.P
The devices for the first eight virtual consoles may be created by:
-.PP
+.P
.in +4n
.EX
for x in 0 1 2 3 4 5 6 7 8; do
@@ -69,7 +69,7 @@ done
chown root:tty /dev/vcs*
.EE
.in
-.PP
+.P
No
.BR ioctl (2)
requests are supported.
@@ -83,39 +83,39 @@ requests are supported.
Introduced with Linux 1.1.92.
.SH EXAMPLES
You may do a screendump on vt3 by switching to vt1 and typing
-.PP
+.P
.in +4n
.EX
cat /dev/vcs3 >foo
.EE
.in
-.PP
+.P
Note that the output does not contain
newline characters, so some processing may be required, like
in
-.PP
+.P
.in +4n
.EX
fold \-w 81 /dev/vcs3 | lpr
.EE
.in
-.PP
+.P
or (horrors)
-.PP
+.P
.in +4n
.EX
setterm \-dump 3 \-file /proc/self/fd/1
.EE
.in
-.PP
+.P
The
.I /dev/vcsa0
device is used for Braille support.
-.PP
+.P
This program displays the character and screen attributes under the
cursor of the second virtual console, then changes the background color
there:
-.PP
+.P
.EX
#include <unistd.h>
#include <stdlib.h>