NAME¶
Linux::Pid - Get the native PID and the PPID on Linux
SYNOPSIS¶
use Linux::Pid;
print Linux::Pid::getpid(), "\t", Linux::Pid::getppid(), "\n";
use Linux::Pid qw(getpid getppid);
print getpid(), "\t", getppid(), "\n";
DESCRIPTION¶
Why should one use a module to get the PID and the PPID of a process where there
are the $$ variable and the
"getppid()" builtin ? (Not mentioning the
equivalent "POSIX::getpid()" and
"POSIX::getppid()" functions.)
In fact, this is useful on Linux, with multithreaded programs.
Linux' C library, using the linux thread model, returns different values of
the PID and the PPID from different threads. (Other thread models such as
NPTL don't have the same behaviour). This module forces perl to call the
underlying C functions "getpid()" and
"getppid()".
AUTHOR¶
Copyright (c) 2002-2007 Rafael Garcia-Suarez. All rights reserved. This program
is free software; you can redistribute it and/or modify it under the same
terms as Perl itself.
