Re^2: How to clear named pipe to just have one line

Basically there are two unrelated processes say P1 (A C program) and P2(a Perl script). Now P2 is running and is output some data to stdout. Now P1 will come at regular interval to read such data.

As these are unrelated processes. So I was thinking to use named pipe. Now process P1 want to read only one line which is output from process P2. As it continuously generates output we want to truncate the data so that process P1 don't read redundant data.

Any thoughts how to solve this problem.

Comment on Re^2: How to clear named pipe to just have one line

Replies are listed 'Best First'.
Re^3: How to clear named pipe to just have one line by moritz (Cardinal) on Feb 08, 2014 at 13:29 UTC
Modify P1 to not produce redundant data, or add a filtering script in the middle that produces only non-redundant data, so `P1 \| filter \| P2`. Perl 6 - the future is here, just unevenly distributed	[reply] [d/l]
Re^4: How to clear named pipe to just have one line by techman2006 (Beadle) on Feb 08, 2014 at 13:54 UTC
As process P1 is an server which is multithread and one of thread will try to read status from process P2. So process P1 will not have way to capture stdout of process P2.	[reply]
Re^5: How to clear named pipe to just have one line by moritz (Cardinal) on Feb 09, 2014 at 12:46 UTC
Being multithreaded has nothing to do with the ability to capture stdout. Aslo I don't understand how a named pipe would have helped. Maybe try to start from the beginning, explain what's actually going on, and what you want to achieve? Perl 6 - the future is here, just unevenly distributed	[reply]


Welcome to the Monastery
	PerlMonks