osf1 man page for tcflush

tcflush(3)						     Library Functions Manual							tcflush(3)

NAME
       tcflush -  Flushes nontransmitted output data or nonread input data

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

SYNOPSIS
       #include <termios.h>

       int tcflush(
	       int filedes,
	       int queue_selector);

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

       tcflush():  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 associated with a terminal.  Specifies one of the following: Flush data received but not read.  Flush
       data written but not transmitted.  Flush both data received but not read and data written but not transmitted.

DESCRIPTION
       The tcflush() function discards any data written to the object referred to by the filedes parameter, or data received but not read  by  the
       object referred to by filedes, depending on the value of the queue_selector parameter.

       A  process  group is sent a SIGTTOU signal if the tcflush() 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 tcflush() function sets errno to the specified values for the following conditions:

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

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

       Files: termios (4)

       Standards: standards(5) delim off

																	tcflush(3)