Node:Output Modes, Next:Control Modes, Previous:Input Modes, Up:Terminal Modes
This section describes the terminal flags and fields that control how
output characters are translated and padded for display. All of these
are contained in the c_oflag
member of the struct termios
structure.
The c_oflag
member itself is an integer, and you change the flags
and fields using the operators &
, |
, and ^
. Don't
try to specify the entire value for c_oflag
--instead, change
only specific flags and leave the rest untouched (see Setting Modes).
tcflag_t OPOST | Macro |
If this bit is set, output data is processed in some unspecified way so
that it is displayed appropriately on the terminal device. This
typically includes mapping newline characters ('\n' ) onto
carriage return and linefeed pairs.
If this bit isn't set, the characters are transmitted as-is. |
The following three bits are BSD features, and they exist only BSD
systems and the GNU system. They are effective only if OPOST
is
set.
tcflag_t ONLCR | Macro |
If this bit is set, convert the newline character on output into a pair of characters, carriage return followed by linefeed. |
tcflag_t OXTABS | Macro |
If this bit is set, convert tab characters on output into the appropriate number of spaces to emulate a tab stop every eight columns. |
tcflag_t ONOEOT | Macro |
If this bit is set, discard C-d characters (code 004 ) on
output. These characters cause many dial-up terminals to disconnect.
|