Next: Window Manipulation, Previous: Output Options Setting, Up: Curses [Contents][Index]
These routines set options within curses that deal with input. The
options involve using ioctl(2) and therefore interact with curses
routines. It is not necessary to turn these options off before
calling endwin
. The routines in this section all return an
unspecified value.
These two routines put the terminal into and out of CBREAK
mode,
respectively. In CBREAK
mode, characters typed by the user are
immediately available to the program and erase/kill character
processing is not performed. When in NOCBREAK
mode, the tty driver
will buffer characters typed until a LFD or RET is typed.
Interrupt and flowcontrol characters are unaffected by this mode.
Initially the terminal may or may not be in CBREAK
mode, as it is
inherited, therefore, a program should call cbreak
or nocbreak
explicitly. Most interactive programs using curses will set CBREAK
mode.
Note cbreak
overrides raw
. For a discussion of
how these routines interact with echo
and noecho
See read-char.
The terminal is placed into or out of RAW
mode. RAW
mode
is similar to CBREAK
mode, in that characters typed are
immediately passed through to the user program. The differences are
that in RAW
mode, the interrupt, quit, suspend, and flow control
characters are passed through uninterpreted, instead of generating a
signal. RAW
mode also causes 8-bit input and output. The
behavior of the BREAK
key depends on other bits in the terminal
driver that are not set by curses.
These routines control whether characters typed by the user are echoed
by read-char
as they are typed. Echoing by the tty driver is
always disabled, but initially read-char
is in ECHO
mode,
so characters typed are echoed. Authors of most interactive programs
prefer to do their own echoing in a controlled area of the screen, or
not to echo at all, so they disable echoing by calling noecho
.
For a discussion of how these routines interact with echo
and
noecho
See read-char.
These routines control whether LFD is translated into RET
and LFD
on output, and whether RET is translated into
LFD on input. Initially, the translations do occur. By disabling
these translations using nonl
, curses is able to make better use
of the linefeed capability, resulting in faster cursor motion.
These routines save and restore the state of the terminal modes.
savetty
saves the current state of the terminal in a buffer and
resetty
restores the state to what it was at the last call to
savetty
.
Next: Window Manipulation, Previous: Output Options Setting, Up: Curses [Contents][Index]