ultrix man page for getpid

getpid(2)							System Calls Manual							 getpid(2)

Name
       getpid, getppid - get process identification

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

       pid = getpid()
       pid_t pid;

       ppid = getppid()
       pid_t ppid;

Description
       The  system call returns the process ID of the current process.	Most often it is used, with the host identifier to generate uniquely named
       temporary files.

Return Values
       The system call returns the process ID of the parent of the current process.

Environment
   POSIX
       When your program is compiled in POSIX mode, the and functions return a value of type pid_t.

See Also
       gethostid(2)

																	 getpid(2)