Perl::AfterFork - reinitializes Perl's notion of $$ and getppid()
use Perl::AfterFork; &Perl::AfterFork::reinit_pid; &Perl::AfterFork::reinit_ppid; &Perl::AfterFork::reinit_pidstatus; &Perl::AfterFork::reinit;
fork() command or your libc's
fork() function or even your operating system's
fork syscall does not do the same thing.
Since a process' PID does not change during it's life time Perl caches the result of the
getpid syscall using the once fetched PID each time
$$ is used. Hence after a successful
fork() the internal PID-cache must be invalidated. The same argument is valid for
glibc. It caches the
getpid(2) as well.
getppid(2), Perl is even caching that. In my opinion Perl is doing wrong when caching the
getppid(2) result at all since it can change without further notice when the parent process dies.
Further Perl maintains an internal cache of spawned children for it's
All these cached information can be reinitialized with this module.
reinitializes the PID-cache
reinitializes the PPID-cache
reinitializes the waitpid-cache
reinitializes all 3 at once
Not an Exporter.
Torsten Foertsch, <firstname.lastname@example.org>
Copyright (C) 2005 by Torsten Foertsch
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.5 or, at your option, any later version of Perl 5 you may have available.