tcflush() : Inappropriate I/O control operation

QNX Newsgroups (Archives) qnx.rtos
#1

Hello,

I am trying to flush the receive buffer of a pipe created with the
pipe() command, but I’m getting the error: Inappropriate I/O control
operation.

Sample code:

{
int fd[2];

if ( pipe(fd) == -1) perror(“pipe”);

if (tcflush(fd[0], TCIFLUSH) == -1) perror(“tcflush”);
}

Any suggestions?
Thx!
Alain.

#2

Alain Achkar wrote:

I am trying to flush the receive buffer of a pipe created with the
pipe() command, but I’m getting the error: Inappropriate I/O control
operation.

A pipe is not a terminal device, and so does not support that operation.

Any suggestions?

Any data written to a pipe must be read (or is discarded only when
all readers/writers close it). You could loop making a non-blocking
read() of the pipe and discarding data in that manner until EAGAIN.