TIOCLINUX(2const) - Linux manual page (original) (raw)
TIOCLINUX(2const) TIOCLINUX(2const)
NAME top
TIOCLINUX - ioctls for console terminal and virtual consolesSYNOPSIS top
**#include <linux/tiocl.h>** /* Definition of **TIOCL_*** constants */
**#include <sys/ioctl.h>**
**int ioctl(int** _fd_**, TIOCLINUX, void ***_argp_**);**DESCRIPTION top
The action of the following ioctls depends on the first byte in
the struct pointed to by _argp_, referred to here as the _subcode_.
These are legal only for the superuser or the owner of the current
terminal.
**subcode**=**0**
Dump the screen. Disappeared in Linux 1.1.92. (With Linux
1.1.92 or later, read from _/dev/vcs_N or _/dev/vcsa_N
instead.)
**subcode**=**1**
Get task information. Disappeared in Linux 1.1.92.
**subcode**=**TIOCL_SETSEL**
Set selection. _argp_ points to a
struct {
char subcode;
short xs, ys, xe, ye;
short sel_mode;
};
_xs_ and _ys_ are the starting column and row. _xe_ and _ye_ are
the ending column and row. (Upper left corner is
row=column=1.) _selmode_ is 0 for character-by-character
selection, 1 for word-by-word selection, or 2 for line-by-
line selection. The indicated screen characters are
highlighted and saved in a kernel buffer.
Since Linux 6.7, using this subcode requires the
**CAP_SYS_ADMIN** capability.
**subcode**=**TIOCL_PASTESEL**
Paste selection. The characters in the selection buffer
are written to _fd_.
Since Linux 6.7, using this subcode requires the
**CAP_SYS_ADMIN** capability.
**subcode**=**TIOCL_UNBLANKSCREEN**
Unblank the screen.
**subcode**=**TIOCL_SELLOADLUT**
Sets contents of a 256-bit look up table defining
characters in a "word", for word-by-word selection. (Since
Linux 1.1.32.)
Since Linux 6.7, using this subcode requires the
**CAP_SYS_ADMIN** capability.
**subcode**=**TIOCL_GETSHIFTSTATE**
_argp_ points to a char which is set to the value of the
kernel variable _shiftstate_. (Since Linux 1.1.32.)
**subcode**=**TIOCL_GETMOUSEREPORTING**
_argp_ points to a char which is set to the value of the
kernel variable _reportmouse_. (Since Linux 1.1.33.)
**subcode**=**8**
Dump screen width and height, cursor position, and all the
character-attribute pairs. (Linux 1.1.67 through Linux
1.1.91 only. With Linux 1.1.92 or later, read from
_/dev/vcsa*_ instead.)
**subcode**=**9**
Restore screen width and height, cursor position, and all
the character-attribute pairs. (Linux 1.1.67 through Linux
1.1.91 only. With Linux 1.1.92 or later, write to
_/dev/vcsa*_ instead.)
**subcode**=**TIOCL_SETVESABLANK**
Handles the Power Saving feature of the new generation of
monitors. VESA screen blanking mode is set to _argp[1]_,
which governs what screen blanking does:
**0** Screen blanking is disabled.
**1** The current video adapter register settings are
saved, then the controller is programmed to turn off
the vertical synchronization pulses. This puts the
monitor into "standby" mode. If your monitor has an
Off_Mode timer, then it will eventually power down
by itself.
**2** The current settings are saved, then both the
vertical and horizontal synchronization pulses are
turned off. This puts the monitor into "off" mode.
If your monitor has no Off_Mode timer, or if you
want your monitor to power down immediately when the
blank_timer times out, then you choose this option.
(_Caution:_ Powering down frequently will damage the
monitor.) (Since Linux 1.1.76.)
**subcode**=**TIOCL_SETKMSGREDIRECT**
Change target of kernel messages ("console"): by default,
and if this is set to **0**, messages are written to the
currently active VT. The VT to write to is a single byte
following **subcode**. (Since Linux 2.5.36.)
**subcode**=**TIOCL_GETFGCONSOLE**
Returns the number of VT currently in foreground. (Since
Linux 2.5.36.)
**subcode**=**TIOCL_SCROLLCONSOLE**
Scroll the foreground VT by the specified amount of _lines_
down, or half the screen if **0**. _lines_ is *(((int32_t
*)&subcode) + 1). (Since Linux 2.5.67.)
**subcode**=**TIOCL_BLANKSCREEN**
Blank the foreground VT, ignoring "pokes" (typing): can
only be unblanked explicitly (by switching VTs, to text
mode, etc.). (Since Linux 2.5.71.)
**subcode**=**TIOCL_BLANKEDSCREEN**
Returns the number of VT currently blanked, **0** if none.
(Since Linux 2.5.71.)
**subcode**=**16**
Never used.
**subcode**=**TIOCL_GETKMSGREDIRECT**
Returns target of kernel messages. (Since Linux 2.6.17.)RETURN VALUE top
On success, 0 is returned (except where indicated). On failure,
-1 is returned, and _[errno](../man3/errno.3.html)_ is set to indicate the error.ERRORS top
**EINVAL** _argp_ is invalid.
**EPERM** Insufficient permission.STANDARDS top
Linux.SEE ALSO top
[ioctl(2)](../man2/ioctl.2.html), [ioctl_console(2)](../man2/ioctl%5Fconsole.2.html)COLOPHON top
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man-pages@man7.orgLinux man-pages 6.10 2024-06-13 TIOCLINUX(2const)
Pages that refer to this page:ioctl_console(2), ioctl_tty(2)