getpid man page


This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

getpid — get the process ID


#include <unistd.h>

pid_t getpid(void);


The getpid() function shall return the process ID of the calling process.

Return Value

The getpid() function shall always be successful and no return value is reserved to indicate an error.


No errors are defined.

The following sections are informative.

See Also

exec, fork(), getpgrp(), getppid(), kill(), mkdtemp(), setpgid(), setsid()

The Base Definitions volume of POSIX.1‐2008, <sys_types.h>, <unistd.h>


2013 IEEE/The Open Group POSIX Programmer's Manual