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The <termios.h> header contains the definitions used by the terminal I/O interfaces.Seetermios(3C) andtermio(7I) for an overview of the terminal interface.

The termios Structure

The following data types are defined throughtypedef:

cc_t: used for terminal special characters
speed_t: used for terminal baud rates
tcflag_t: used for terminal modes

The above types are all unsigned integer types.

The implementation supports one or more programming environments in which the widthsofcc_t,speed_t, andtcflag_t are no greater than the width oftypelong. The names of these programming environments can be obtained using theconfstr(3C) function or thegetconf(1) utility.

Thetermios structure is defined and includes the following members:

tcflag_t c_iflag        /* input modes */tcflag_t c_oflag        /* output modes */tcflag_t c_cflag        /* control modes */tcflag_t c_lflag        /* local modes */cc_t     c_cc[NCCS]     /* control characters */

A definition is provided for:

NCCS: size of the arrayc_cc for control characters

The following subscript names for the arrayc_cc are defined:

Subscript Usage Canonical Mode	SubscriptUsage Non-Canonical Mode	Description
`VEOF`		EOF character
`VEOL`		EOL character
`VERASE`		ERASE character
`VINTR`	`VINTR`	INTR character
`VKILL`		KILL character
	`VMIN`	MIN value
`VQUIT`	`VQUIT`	QUIT character
`VSTART`	`VSTART`	START character
`VSTOP`	`VSTOP`	STOP character
`VSUSP`	`VSUSP`	SUSP character
	`VTIME`	TIMEvalue

The subscript values are unique, except that theVMIN andVTIME subscriptscan have the same values as theVEOF andVEOL subscripts, respectively.

The header file provides the flags described below.

Input Modes

Thec_iflag field describes the basic terminal input control:

BRKINT: Signal interrupt on break.
ICRNL: Map CR to NL on input.
IGNBRK: Ignore break condition.
IGNCR: Ignore CR.
IGNPAR: Ignore characters with parity errors.
INLCR: Map NL to CR on input.
INPCK: Enable input parity check.
ISTRIP: Strip character.
IXANY: Enable any character to restart output.
IXOFF: Enable start/stop input control.
IXON: Enable start/stop output control.
PARMRK: Mark parity errors.

Output Modes

Thec_oflag field specifies the system treatment of output:

OPOST

Post-process output.

ONLCR

Map NL to CR-NL on output.

OCRNL

Map CR to NL on output.

ONOCR

No CR output at column 0.

ONLRET

NL performs CR function.

OFILL

Use fill characters for delay.

NLDLY

Select newline delays:

NL0: newline type 0
NL1: newline type 1

CRDLY

Select carriage-return delays:

CR0: carriage-return delay type 0
CR1: carriage-return delay type 1
CR2: carriage-return delay type 2
CR3: carriage-return delay type 3

TABDLY

Select horizontal-tab delays:

TAB0: horizontal-tab delay type 0
TAB1: horizontal-tab delay type 1
TAB2: horizontal-tab delay type 2
TAB3: expand tabs to spaces

BSDLY

Select backspace delays:

BS0: backspace-delay type 0
BS1: backspace-delay type 1

VTDLY

Select vertical-tab delays:

VT0: vertical-tab delay type 0
VT1: vertical-tab delay type 1

FFDLY

Select form-feed delays:

FF0: form-feed delay type 0
FF1: form-feed delay type 1

Baud Rate Selection

The input and output baud rates are stored in thetermios structure.These are the valid values for objects of typespeed_ t. The followingvalues are defined, but not all baud rates need be supported bythe underlying hardware.

B0: Hang up
B50: 50 baud
B75: 75 baud
B110: 110 baud
B134: 134.5 baud
B150: 150 baud
B200: 200 baud
B300: 300 baud
B600: 600 baud
B1200: 1 200 baud
B1800: 1 800 baud
B2400: 2 400 baud
B4800: 4 800 baud
B9600: 9 600 baud
B19200: 19 200 baud
B38400: 38 400 baud

Control Modes

Thec_cflag field describes the hardware control of the terminal; not allvalues specified are required to be supported by the underlying hardware:

CSIZE

Character size:

CS5: 5 bits
CS6: 6 bits
CS7: 7 bits
CS8: 8 bits

CSTOPB

Send two stop bits, else one.

CREAD

Enable receiver.

PARENB

Parity enable.

PARODD

Odd parity, else even.

HUPCL

Hang up on last close.

CLOCAL

Ignore modem status lines.

The implementation supports the functionality associated with the symbolsCS7,CS8,CSTOPB,PARODD, andPARENB.

Local Modes

Thec_lflag field of the argument structure is used to control variousterminal functions:

ECHO: Enable echo.
ECHOE: Echo erase character as error-correcting backspace.
ECHOK: Echo KILL.
ECHONL: Echo NL.
ICANON: Canonical input (erase and kill processing).
IEXTEN: Enable extended input character processing.
ISIG: Enable signals.
NOFLSH: Disable flush after interrupt or quit.
TOSTOP: SendSIGTTOU for background output.

Attribute Selection

The following symbolic constants for use withtcsetattr() are defined:

TCSANOW: Change attributes immediately.
TCSADRAIN: Change attributes when output has drained.
TCSAFLUSH: Change attributes when output has drained; also flush pending input.

Line Control

The following symbolic constants for use withtcflush() are defined:

TCIFLUSH: Flush pending input.
TCIOFLUSH: Flush both pending input and untransmitted output.
TCOFLUSH: Flush untransmitted output.

The following symbolic constants for use withtcflow() are defined:

TCIOFF: Transmit aSTOP character, intended to suspend input data.
TCION: Transmit aSTART character, intended to restart input data.
TCOOFF: Suspend output.
TCOON: Restart output.

Attributes

Seeattributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Interface Stability	Committed
Standard	See`standards`(5).

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	man pages section 3: Library Interfaces and Headers Oracle Solaris 11 Information Library

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termios.h

, termios

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