HP-UX Reference (11i v1 05/09) - 7 Device (Special) Files, 9 General Information, Index (vol 10)

t
termio(7) termio(7)
Local Modes
The c_lflag field is used to control terminal functions.
ISIG Enable signals.
ICANON Canonical input (erase and kill processing).
XCASE Canonical upper/lower presentation.
ECHO Enable echo.
ECHOE Echo ERASE as correcting backspace sequence.
ECHOK Echo NL after kill character.
ECHONL Echo NL.
NOFLSH Disable flush after interrupt, quit, or suspend.
TOSTOP Send SIGTTOU for background output.
ECHOCTL Echo control characters as ˆchar, DEL
as ˆ?.
ECHOPRT Echo erased character as character is erased.
ECHOKE BS SP BS erase entire line on line kill.
FLUSHO Output is being flushed.
PENDIN Reprocess pending input at next read or input character.
IEXTEN Enable extended functions.
If ISIG is set, each input character is checked against the special control characters INTR, QUIT, SUSP,
and
DSUSP (see Process Group Control IOCTL Commands). If an input character matches one of these control
characters, the function associated with that character is performed and the character is discarded. If
ISIG is clear, no checking is done and the character is treated as a normal data character. Thus these
special input functions are possible only if ISIG is set.
If ICANON is set, canonical processing is enabled. This enables the erase and kill edit functions, and the
assembly of input characters into lines delimited by NL, EOF, EOL, or EOL2.
If ICANON is clear, read
requests are satisfied directly from the input queue. A read blocks until at least
MIN
characters have been
received or the timeout value
TIME has expired between characters. (See Non-Canonical Mode Input Pro-
cessing (MIN/TIME Interaction)). This allows fast bursts of input to be read efficiently while still allowing
single-character input. The time value represents tenths of seconds.
If XCASE is set, and if ICANON is set, an uppercase letter is accepted on input by preceding it with a
\
character, and is output preceded by a \ character. In this mode, the following escape sequences are gen-
erated on output and accepted on input:
To ob tain: Use:
‘\’
|\!
{\(
}\)
\\\
For example, A is input as \a, \n as \\n, and \N
as \\\n. XCASE would normally be used in con-
junction with
IUCLC and OLCUC for terminals that support only the first-sixty-four-character limited
character set. In this case, IUCLC processing is done before XCASE for input, and processing is done
after XCASE for output. Therefore typing A causes an a to be read because of IUCLC
, and typing \A
causes an A to be read since IUCLC produces \a which is turned into A by the
XCASE processing.
If
ECHO is set, characters are echoed back to the terminal when received. If ECHO is clear, characters are
not echoed.
When ICANON is set, canonical processing is enabled. This enables the erase and kill edit functions, and
the assembly of input characters into lines delimited by NL, EOF, EOL and EOL2 as described in Canonical
Mode Input Processing. Furthermore, the following echo functions are possible.
If ECHO and ECHOE are set, the ERASE and WERASE characters are echoed as the three-character ASCII
sequence BS SP BS, which clears the last character or word from the CRT screen.
If ECHO and ECHOPRT are set, and ECHOE is clear, the first ERASE and WERASE character in a sequence
echoes a backslash (\) followed by the characters being erased. Subsequent ERASE or WERASE characters
echo the characters being erased in reverse order. The next non-erase character causes a slash (/) to be
typed before it is echoed.
If ECHOKE and ECHO are set, the KILL character is echoed by erasing each character on the line from the
CRT screen using using the method selected by ECHOE and ECHOPRT.
HP-UX 11i Version 1: September 2005 − 11 − Hewlett-Packard Company Section 7−−185