Beefy Boxes and Bandwidth Generously Provided by pair Networks
Just another Perl shrine
 
PerlMonks  

Re: Parent process finished. How to exit the child process.

by spazm (Monk)
on May 07, 2010 at 04:29 UTC ( #838853=note: print w/ replies, xml ) Need Help??


in reply to Parent process finished. How to exit the child process.

Some options:

  1. parent sends kill signal to child when parent processing is complete. Child dies. parent reaps child and exits (or continues, I suppose).
  2. reverse the roll of parent and child. The child does the computing and the parent handles the counting&display. Child exits when complete and parent reaps child via SIG CHLD handler.
if(my $pid=fork){ while(my $c = ReadKey){ #doing something... ; } kill( HUP => $pid ); wait(0); } else { my $count = 0; while(1){ sleep(1); print $count++; } }
if(my $pid=fork){ #parent my $run = 1; $SIG{CHLD} = sub { $deadchildpid = wait; $run = 0 }; my $count = 0; while($run){ sleep(1); print $count++; } } else { #child while(my $c = ReadKey){ #doing something... ; } }


Comment on Re: Parent process finished. How to exit the child process.
Select or Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://838853]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others taking refuge in the Monastery: (5)
As of 2015-07-04 22:54 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (60 votes), past polls