1Pid(3)                User Contributed Perl Documentation               Pid(3)
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NAME

6       Linux::Pid - Get the native PID and the PPID on Linux
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SYNOPSIS

9           use Linux::Pid;
10           print Linux::Pid::getpid(), "\t", Linux::Pid::getppid(), "\n";
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12           use Linux::Pid qw(getpid getppid);
13           print getpid(), "\t", getppid(), "\n";
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DESCRIPTION

16       Why should one use a module to get the PID and the PPID of a process
17       where there are the $$ variable and the "getppid()" builtin ? (Not
18       mentioning the equivalent "POSIX::getpid()" and "POSIX::getppid()"
19       functions.)
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21       In fact, this is useful on Linux, with multithreaded programs. Linux' C
22       library, using the linux thread model, returns different values of the
23       PID and the PPID from different threads. (Other thread models such as
24       NPTL don't have the same behaviour). This module forces perl to call
25       the underlying C functions "getpid()" and "getppid()".
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AUTHOR

28       Copyright (c) 2002-2007 Rafael Garcia-Suarez. All rights reserved. This
29       program is free software; you can redistribute it and/or modify it
30       under the same terms as Perl itself.
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34perl v5.34.0                      2021-07-22                            Pid(3)
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