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getpid(2)							    getpid(2)



NAME

  getpid, getpgrp, getppid - Gets the process ID, process group	ID, parent
  process ID

SYNOPSIS

  #include <&lt;unistd.h>&gt;

  pid_t	getpid(	void );

  pid_t	getpgrp( void );

  pid_t	getppid( void );

  Application developers may want to specify an	#include statement for
  <&lt;sys/types.h>&gt;	before the one for <&lt;unistd.h>&gt; if programs are being developed
  for multiple platforms. The additional #include statement is not required
  on Tru64 UNIX	systems	or by ISO or X/Open standards, but may be required on
  other	vendors' systems that conform to these standards.

STANDARDS

  Interfaces documented	on this	reference page conform to industry standards
  as follows:

  getpid(), getpgrp(), getppid():  POSIX.1, XPG4, XPG4-UNIX

  Refer	to the standards(5) reference page for more information	about indus-
  try standards	and associated tags.

DESCRIPTION

  The getpid() function	returns	the process ID of the calling process.

  The getpgrp()	function returns the process group ID of the calling process.

  The getppid()	function returns the parent process ID of the calling pro-
  cess.	 When a	process	is created, its	parent process ID is the process ID
  of its parent	process.  If a parent process exits, the parent	process	IDs
  of its child processes are changed to	the process ID of the init program.

RELATED	INFORMATION

  System calls:	fork(2), kill(2), setpgid(2), setsid(2), wait(2)

  Standards: standards(5)