|
Previous | Table of Contents | Next
Page 1079
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
tty.
|
TIOCLINUX, subcode=0
|
Dump the screen. Disappeared in 1.1.92. (With kernel 1.1.92 or later, read from
/dev/vcsN or /dev/vcsaN instead.)
| |
TIOCLINUX, subcode=1
|
Get task information. Disappeared in 1.1.92.
| |
TIOCLINUX, subcode=2
|
Set selection. argp points to a
struct{fchar 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.) sel_mode 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 the static array sel buffer in
devices/char/console.c.
| |
TIOCLINUX, subcode=3
|
Paste selection. The characters in the selection buffer are written to
fd.
| |
TIOCLINUX, subcode=4
|
Unblank the screen.
| |
TIOCLINUX, subcode=5
|
Sets contents of a 256-bit look up table defining characters in a "word", for
word-by-word selection. (Since 1.1.32.)
| |
TIOCLINUX, subcode=6
|
argp points to a char that is set to the value of the kernel variable shift state.
(Since 1.1.32.)
| |
TIOCLINUX, subcode=7
|
argp points to a char that is set to the value of the kernel variable report
mouse. (Since 1.1.33.)
| |
TIOCLINUX, subcode=8
|
Dump screen width and height, cursor position, and all the character-attribute
pairs. (Kernels 1.1.67 through 1.1.91 only. With kernel 1.1.92 or later, read from
/dev/vcsa* instead.)
| |
TIOCLINUX, subcode=9
|
Restore screen width and height, cursor position, and all the
character-attribute pairs. (Kernels 1.1.67 through 1.1.91 only. With kernel 1.1.92 or later, write to
/dev/vcsa* instead.)
| |
TIOCLINUX, subcode=10
|
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 1.1.76.)
|
Return Values
-1 for error, and errno is set.
Errors
errno may take on these values:
|
EBADF
|
File descriptor is invalid.
| |
ENOTTY
|
File descriptor is not associated with a character special device, or the
specified request does not apply to it.
|
Page 1080
|
EINVAL
|
File descriptor or argp is invalid.
| |
EPERM
|
Permission violation.
|
|
WARNING
|
Do not regard this man page as documentation of the Linux console ioctls. This is provided for the curious only, as
an alternative to reading the source. Ioctls are undocumented Linux internals, liable to be changed without warning.
(And indeed, this page more or less describes the situation as of kernel version 1.1.94; there are many minor and
not-so-minor differences with earlier versions.)
Very often, ioctls are introduced for communication between the kernel and one particular well-known program
(fdisk, hdparm, setserial, tunelp, loadkeys,
selection, setfont, and so on), and their behavior will be changed when required
by this particular program.
Programs using these ioctls will not be portable to other versions of UNIX, will not work on older versions of Linux,
ad will not work on future versions of Linux.
Use POSIX functions.
|
See Also
kbd_mode(1), loadkeys(1), dumpkeys(1), mknod(1), setleds(1), setmetamode(1), ioperm(2), termios(2), execve(2), fcntl(2),
charsets(4), console(4), console_codes(4), mt(4), sd(4), tty(4), ttys(4), vcs(4), vcsa(4), mapscrn(8), setfont(8), resizecons(8),
/usr/include/linux/kd.h, /usr/include/linux/vt.h.
Linux, 18 September 1995
fd—Floppy disk device
CONFIGURATION
Floppy drives are block devices with major number 2. Typically, they are owned by
root.floppy (that is, user root, group floppy) and have either mode
0660 (access checking via group membership) or mode
0666 (everybody has access). The minor numbers encode the device type, drive number, and controller number. For each device type (that is, combination of
density and track count), there is a base minor number. To this base number, add the drive's number on its controller and
128 if the drive is on the secondary controller. In the following device tables,
n represents the drive number.
|
WARNING
|
If you use formats with more tracks than supported by your drive, you may cause it mechanical damage. Trying once
if more tracks than the usual 40/80 are supported should not damage it, but no warranty is given for that. Don't
create device entries for those formats to prevent their usage if you are not sure.
|
Page 1081
Drive-independent device files that automatically detect the media format and capacity are
5.25-inch double density device files:
|
Name
|
Capac.
|
Cyl.
|
Sect.
|
Heads
|
Base minor #
| |
fdnd360
|
360K
|
40
|
9
|
2
|
4
|
5.25-inch high density device files:
|
Name
|
Capac.
|
Cyl.
|
Sect.
|
Heads
|
Base minor #
| |
fdnh360
|
360K
|
40
|
9
|
2
|
20
| |
fdnh410
|
410K
|
41
|
10
|
2
|
48
| |
fdnh420
|
420K
|
42
|
10
|
2
|
64
| |
fdnh720
|
720K
|
80
|
9
|
2
|
24
| |
fdnh880
|
880K
|
80
|
11
|
2
|
80
| |
fdnh1200
|
1200K
|
80
|
15
|
2
|
8
| |
fdnh1440
|
1440K
|
80
|
18
|
2
|
40
| |
fdnh1476
|
1476K
|
82
|
18
|
2
|
56
| |
fdnh1494
|
1494K
|
83
|
18
|
2
|
72
| |
fdnh1600
|
1600K
|
80
|
20
|
2
|
92
|
3.5-inch double density device files:
|
Name
|
Capac.
|
Cyl.
|
Sect.
|
Heads
|
Base minor #
| |
fdnD360
|
360K
|
80
|
9
|
1
|
12
| |
fdnD720
|
720K
|
80
|
9
|
2
|
16
| |
fdnD800
|
800K
|
80
|
10
|
2
|
120
| |
fdnD1040
|
1040K
|
80
|
13
|
2
|
84
| |
fdnD1120
|
1120K
|
80
|
14
|
2
|
88
|
3.5-inch high density device files:
|
Name
|
Capac.
|
Cyl.
|
Sect.
|
Heads
|
Base minor #
| |
fdnH360
|
360K
|
40
|
9
|
2
|
12
| |
fdnH720
|
720K
|
80
|
9
|
2
|
16
| |
fdnH820
|
820K
|
82
|
10
|
2
|
52
| |
fdnH830
|
830K
|
83
|
10
|
2
|
68
| |
fdnH1440
|
1440K
|
80
|
18
|
2
|
28
| |
fdnH1600
|
1600K
|
80
|
20
|
2
|
124
| |
fdnH1680
|
1680K
|
80
|
21
|
2
|
44
| |
fdnH1722
|
1722K
|
82
|
21
|
2
|
60
| |
fdnH1743
|
1743K
|
83
|
21
|
2
|
76
| |
fdnH1760
|
1760K
|
80
|
22
|
2
|
96
| |
fdnH1840
|
1840K
|
80
|
23
|
2
|
116
| |
fdnH1920
|
1920K
|
80
|
24
|
2
|
100
|
Previous | Table of Contents | Next
|
