🚀 go-pugleaf

tesco@bumetb.bu.edu (Dances With Babes) writes:


| I have recently discovered named pipes but can't seem to get them to do
| what I want.  Is it possible to use a background process to read from a
| named pipe while many other processes write to that named pipe.
| When i try to test this capability in the unix k shell the background
| process ends.

| ex. 
| mknod testpipe p
| cat testpipe &
| ls > testpipe
| The "cat" process ends after the ls is sent to the screen.

| I've been told by IBM tech support that this is the way it supposed to work.
| This is on an RS6000 running AIX ver 3.2.2. 

IBM tech support is right, but not exercising much imagination.  Try this:

  mknod testpipe p
  (echo holding; sleep 60) > testpipe &
  ls > testpipe

The pipe should stay open as long as there's at least one process holding it
open for write.

	Donn Cave, University Computing Services, University of Washington
	donn@cac.washington.edu