Struct LINUX_IOCTL

(since Linux 3.8) If the terminal is currently in exclusive mode, place a nonzero value in the location pointed to by argp; otherwise, place zero in *argp.

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impl LINUX_IOCTL

§Faking input

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pub const TIOCSTI: c_ulong = 0x5412

Insert the given byte in the input queue.

Argument: const char *argp

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impl LINUX_IOCTL

§Get and set window size

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pub const TIOCGWINSZ: c_ulong = 0x5413

Get window size.

Argument: struct winsize *argp

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pub const TIOCSWINSZ: c_ulong = 0x5414

Set window size.

Argument: const struct winsize *argp

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impl LINUX_IOCTL

§Modem control

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pub const TIOCMGET: c_ulong = 0x5415

Get the status of modem bits.

Argument: int *argp

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pub const TIOCMBIS: c_ulong = 0x5416

Set the indicated modem bits.

Argument: const int *argp

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pub const TIOCMBIC: c_ulong = 0x5417

Clear the indicated modem bits.

Argument: const int *argp

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pub const TIOCMSET: c_ulong = 0x5418

Set the status of modem bits.

Argument: const int *argp

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pub const TIOCM_LE: c_int = 0x001

DSR (data set ready/line enable)

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pub const TIOCM_DTR: c_int = 0x002

DTR (data terminal ready)

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pub const TIOCM_RTS: c_int = 0x004

RTS (request to send)

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pub const TIOCM_ST: c_int = 0x008

Secondary TXD (transmit)

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pub const TIOCM_SR: c_int = 0x010

Secondary RXD (receive)

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pub const TIOCM_CTS: c_int = 0x020

CTS (clear to send)

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pub const TIOCM_CAR: c_int = 0x040

DCD (data carrier detect)

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pub const TIOCM_CD: c_int = Self::TIOCM_CAR

see TIOCM_CAR

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pub const TIOCM_RNG: c_int = 0x080

RNG (ring)

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pub const TIOCM_RI: c_int = Self::TIOCM_RNG

see TIOCM_RNG

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pub const TIOCM_DSR: c_int = 0x100

DSR (data set ready)

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impl LINUX_IOCTL

§Marking a line as local

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pub const TIOCGSOFTCAR: c_ulong = 0x5419

(“Get software carrier flag”)

Get the status of the CLOCAL flag in the c_cflag field of the termios structure.

Argument: int *argp

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pub const TIOCSSOFTCAR: c_ulong = 0x541A

(“Set software carrier flag”)

Set the CLOCAL flag in the termios structure when *argp is nonzero, and clear it otherwise.

Argument: const int *argp

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impl LINUX_IOCTL

§Buffer count and flushing

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pub const FIONREAD: c_ulong = 0x541B

Get the number of bytes in the input buffer.

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pub const TIOCINQ: c_ulong = Self::FIONREAD

Same as FIONREAD.

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pub const TIOCOUTQ: c_ulong = 0x5411

Get the number of bytes in the output buffer.

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pub const TCFLSH: c_ulong = 0x540B

See tcflush(3) for the argument values TCIFLUSH, TCOFLUSH, TCIOFLUSH.

Equivalent to tcflush(fd, arg).

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pub const TIOCSERGETLSR: c_ulong = 0x5459

Get line status register.

Status register has TIOCSER_TEMT bit set when output buffer is empty and also hardware transmitter is physically empty.

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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. Symbolic subcodes are available in <linux/tiocl.h> since Linux 2.5.71.

See https://man7.org/linux/man-pages/man2/ioctl_console.2.html.

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impl LINUX_IOCTL

§Redirecting console output

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pub const TIOCCONS: c_ulong = 0x541D

Redirect output that would have gone to /dev/console or /dev/tty0 to the given terminal.

Argument: void

If that was a pseudoterminal master, send it to the slave. Before Linux 2.6.10, anybody can do this as long as the output was not redirected yet; since Linux 2.6.10, only a process with the CAP_SYS_ADMIN capability may do this. If output was redirected already, then EBUSY is returned, but redirection can be stopped by using this ioctl with fd pointing at /dev/console or /dev/tty0.

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impl LINUX_IOCTL

§Pseudoterminal ioctls

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pub const TIOCPKT: c_ulong = 0x5420

Enable (when *argp is nonzero) or disable packet mode.

Argument: const int *argp

Can be applied to the master side of a pseudoterminal only (and will return ENOTTY otherwise).

In packet mode, each subsequent read(2) will return a packet that either contains a single nonzero control byte, or has a single byte containing zero (‘\0’) followed by data written on the slave side of the pseudoterminal.

If the first byte is not TIOCPKT_DATA (0), it is an OR of one or more of the following bits:

TIOCPKT_FLUSHREAD The read queue for the terminal is flushed.
TIOCPKT_FLUSHWRITE The write queue for the terminal is flushed.
TIOCPKT_STOP Output to the terminal is stopped.
TIOCPKT_START Output to the terminal is restarted.
TIOCPKT_DOSTOP The start and stop characters are ^S/^Q.
TIOCPKT_NOSTOP The start and stop characters are not ^S/^Q.

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pub const TIOCSPTLCK: c_ulong = 0x4004_5431

Set (if *argp is nonzero) or remove (if *argp is zero) the lock on the pseudoterminal slave device.

Argument: int *argp

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pub const TIOCGPKT: c_ulong = 0x8004_5438

Return the current packet mode setting in the integer pointed to by argp.

Argument: const int *argp

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pub const TIOCGPTLCK: c_ulong = 0x8004_5439

Place the current lock state of the pseudoterminal slave device in the location pointed to by argp.

Argument: int *argp

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pub const TIOCGPTPEER: c_ulong = 0x5441

Open and return a new file descriptor that refers to the peer pseudoterminal slave device.

Argument: int flags

Given a file descriptor in fd that refers to a pseudoterminal master, open (with the given open(2)-style flags) and return a new file descriptor that refers to the peer pseudoterminal slave device.

This operation can be performed regardless of whether the pathname of the slave device is accessible through the calling process’s mount namespace.

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impl LINUX_IOCTL

§Controlling terminal

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pub const TIOCSCTTY: c_ulong = 0x540E

Make the given terminal the controlling terminal of the calling process.

Argument: int arg

The calling process must be a session leader and not have a controlling terminal already. For this case, arg should be specified as zero.

If this terminal is already the controlling terminal of a different session group, then the ioctl fails with EPERM, unless the caller has the CAP_SYS_ADMIN capability and arg equals 1, in which case the terminal is stolen, and all processes that had it as controlling terminal lose it.

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pub const TIOCNOTTY: c_ulong = 0x5422

Give up this controlling terminal.

Argument: void

If the process was session leader, then send SIGHUP and SIGCONT to the foreground process group and all processes in the current session lose their controlling terminal.

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impl LINUX_IOCTL

§Line discipline

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pub const TIOCSETD: c_ulong = 0x5423

Get the line discipline of the terminal.

Argument: int *argp

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pub const TIOCGETD: c_ulong = 0x5424

Set the line discipline of the terminal.

Argument: const int *argp

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impl LINUX_IOCTL

§Sending a break

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pub const TCSBRK: c_ulong = 0x5409

Equivalent to tcsendbreak(fd, arg).

Argument: int arg

If the terminal is using asynchronous serial data transmission, and arg is zero, then send a break (a stream of zero bits) for between 0.25 and 0.5 seconds. If the terminal is not using asynchronous serial data transmission, then either a break is sent, or the function returns without doing anything. When arg is nonzero, nobody knows what will happen.

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