You are viewing the version of this documentation from Perl 5.39.1. This is a development version of Perl.

Returns the process id of the parent process.

Note for Linux users: Between v5.8.1 and v5.16.0 Perl would work around non-POSIX thread semantics the minority of Linux systems (and Debian GNU/kFreeBSD systems) that used LinuxThreads, this emulation has since been removed. See the documentation for $$ for details.

Portability issues: "getppid" in perlport.