Thread: Testing pipe for data

Hi,

I have opened a pipe (popen) to a program (ir-keytable), and need a way to test whether there's more data in the pipe or if it's empty.

Failing that, I need a way to clear all data in a pipe. regardless if there's data.

I can't seem to find a way to accomplish this.

I tried:

Code:

fseek(pp, 0L, SEEK_END);

The only other option I can think of is to close the pipe and open it again for reading. But seems a bit wasteful.

Hope someone might have a little knowledge to help shed some light.

Ty.

The select() function can do this for you.

man 7 pipe : ioctl(fd, FIONREAD, &nbytes);