osf1 man page for tcflow

tcflow(3)						     Library Functions Manual							 tcflow(3)

NAME
       tcflow -  Performs flow control functions

LIBRARY
       Standard C Library (libc.so, libc.a)

SYNOPSIS
       #include <termios.h>

       int tcflow(
	       int filedes,
	       int action);

STANDARDS
       Interfaces documented on this reference page conform to industry standards as follows:

       tcflow():  XPG4, XPG4-UNIX

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

PARAMETERS
       Specifies  an open file descriptor.  Specifies one of the following: Suspend output.  Restart suspended output.	Transmit a STOP character,
       which is intended to cause the terminal device to stop transmitting data to the system.	Transmit a START character, which is  intended	to
       cause the terminal device to start transmitting data to the system.

DESCRIPTION
       The tcflow() function suspends transmission or reception of data on the object referred to by the filedes parameter, depending on the value
       of the action parameter.

       A process group is sent a SIGTTOU signal if the tcflow() function is called from one of its member processes.  If the  calling  process	is
       blocking or ignoring SIGTTOU signals, the process is allowed to perform the operation and no signal is sent.

RETURN VALUES
       Upon successful completion, a value of 0 (zero) is returned. Otherwise, a value of -1 is returned and errno is set to indicate the error.

ERRORS
       The tcflow() function sets errno to the specified values for the following conditions:

       The  filedes  parameter does not specify a valid file descriptor.  The action parameter is not a supported value.  The file associated with
       the filedes parameter is not a terminal.

RELATED INFORMATION
       Functions: tcdrain(3), tcflush(3), tcsendbreak(3)

       Files: termios(4)

       Standards: standards(5) delim off

																	 tcflow(3)