GETPID(2)                        System Calls                        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 guar‐
       anteed to be unique and  is  useful  for  constructing  temporary  file
       names.

       Pids can range from zero (Kernel Null Process) to 32767.  Some programs
       use getpid to seed random number generators.  A much better approach on
       the  IIgs  is to use the horizontal and vertical positions fo the elec‐
       tron gun, which can be obtained by reading the word value  at  absolute
       address 0xE0C02E.

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

ERRORS

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

SEE ALSO

       fork(2), tctpgrp(2), ioctl(2), gethostid(3), GNO Kernel Reference  Man���
       ual.

STANDARDS

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



GNO                             16 January 1997                      GETPID(2)