getppid(2) [osx man page]

GETPID(2)						      BSD System Calls Manual							 GETPID(2)

NAME

     getpid, getppid -- get parent or calling process identification

SYNOPSIS

     #include <unistd.h>

     pid_t
     getpid(void);

     pid_t
     getppid(void);

DESCRIPTION

     Getpid() returns the process ID of the calling process.  The ID is guaranteed to be unique and is useful for constructing temporary file
     names.

     Getppid() returns the process ID of the parent of the calling process.

ERRORS

     The getpid() and getppid() functions are always successful, and no return value is reserved to indicate an error.

LEGACY SYNOPSIS

     #include <sys/types.h>
     #include <unistd.h>

     The include file <sys/types.h> is necessary.

SEE ALSO

     gethostid(2), compat(5)

STANDARDS

     Getpid() and getppid() conform to IEEE Std 1003.1-1988 (``POSIX.1'').

4th Berkeley Distribution					   June 4, 1993 					 4th Berkeley Distribution

getpid(2)							System Calls Manual							 getpid(2)

NAME

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

SYNOPSIS

       #include <unistd.h>

       pid_t getpid( void );

       pid_t getpgrp( void );

       pid_t getppid( void );

       Application  developers	may  want  to  specify an #include statement for <sys/types.h> before the one for <unistd.h> 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 industry 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 process.  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) delim off

																	 getpid(2)