Open System Services System Calls Reference Manual (G06.29+, H06.08+, J06.03+)

termios(4) OSS System Calls Reference Manual
VSTART Indexes the START control character (<Ctrl-q>), which
resumes output that has been suspended by a STOP character.
START characters are ignored if the output is not suspended.
VSTOP Indexes the STOP control character (<Ctrl-s>), which can be
used to temporarily suspend output. This character is recognized
during both input and output if IXOFF (input control) or IXON
(output control) is set.
VSUSP Indexes the SUSP control character (<Ctrl-z>), which causes a
SIGTSTP signal to be sent to all foreground processes con-
trolled by this terminal. This character is recognized during
input if ISIG is set. If job control is not supported, this character
is ignored.
VQUIT Indexes the QUIT control character (<Ctrl-v> or <Ctrl-|>),
which sends a SIGQUIT signal to stop all processes controlled
by this terminal and writes a saveabend file into the current
working directory.
The following values for the optional_actions parameter of the tcsetattr() function are also
defined in the termios.h header file:
TCSADRAIN Waits until all output written to the object file has been transmitted before setting
the terminal parameters from the termios structure.
TCSAFLUSH Waits until all output written to the object file has been transmitted and all input
received but not read has been discarded before setting the terminal parameters
from the termios structure.
TCSANOW Immediately sets the parameters associated with the terminal from the referenced
termios structure.
The following values for the queue_se lector parameter of the tcflush() function are also defined
in the termios.h header file:
TCIFLUSH Flushes data that is received but not read.
TCIOFLUSH Flushes both data that is received but not read and data that is written but not
transmitted.
TCOFLUSH Flushes data that is written but not transmitted.
The following values for the action parameter of the tcflow() function are also defined in the
termios.h header file:
TCIOFF Transmits a STOP character to stop data transmission by the terminal device.
TCION Transmits a START character to start or restart data transmission by the terminal
device.
TCOOFF
Suspends the output of data by the object file named in the tc
flow() function.
TCOON Restarts the output of data that was suspended by the TCOOFF value.
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