Hmm, i tried experimenting with pipes before i posted but couldn't get them to work... Just tried again, copying your example, and *tada*, works! Finally figured out that in my first attempt i had the reader/writer mixed up in the initial pipe... *slaps self*
Future readers, the end result:
my( %pid );
pipe( CHILD, PARENT ); # not PARENT, CHILD!
foreach my $num ( "01" .. "25" )
{
# if max processes, wait for one to finish
if( keys( %pid ) >= 10 ) { &reap() }
if( my $pid = fork() ) # parent
{
$pid{$pid} = $num;
}
else # child
{
&child( $num );
exit 0;
}
}
# reap remaining processes
while( %pid ) { &reap() }
# read child messages
close( PARENT );
while( my $child = <CHILD> )
{
print "> " . $child;
}
close( CHILD );
exit 0;
sub reap
{
my( $pid ) = wait();
if( $pid == -1 ) { die( "no more kids to reap!\n" ) }
if(! $pid{$pid} ) { die( "why did I see $pid?\n" ) }
delete( $pid{$pid} );
}
sub child
{
my( $num ) = $_[0];
close( CHILD );
print "child $num spawned\n";
print PARENT "child $num says hi\n";
}
- ><iper
my JAPH:
print"Just another Perl hacker\n";
# ^ look, no space! pretty tricky huh?
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