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Re: How to fork one and only one child process from a loop ?

by idsfa (Vicar)
on Mar 18, 2006 at 04:50 UTC ( #537641=note: print w/ replies, xml ) Need Help??

in reply to How to fork one and only one child process from a loop ?

This skeleton has no error checking, but it does only spawn one child.

my $kidpid; while( ... loop condition ... ) { . . . if( ! $kidpid) { if(0 == ($kidpid=fork())) { # I'm the child exec { ... } die("How did I get here?"); } } # I'm the parent, keep doing stuff . . . # Before I loop, do a lame check to make sure kid # is still running. Ought to use a Proc:: Module $kidpid=0 if(! grep { m/^\s+$kidpid\s/ } `ps ax`); }

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