getpid -- Determine Process ID

SYNOPSIS

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

 pid_t getpid(void);

DESCRIPTION

getpid determines the process ID of the calling process.

RETURN VALUE

If successful, getpid returns the process ID of the calling process. Under unusual conditions (for instance, if OpenEdition is not running) getpid can fail. In this case, getpid issues an MVS user ABEND 1230 to indicate the error.

EXAMPLE

The following code fragment illustrates the use of getpid to determine the process ID of the calling process:

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

 .
 .
 .
 if (fork() == 0) {
    printf("The child's PID is %d.  The process group ID is %dn",
           (int) getpid(), (int) getpgrp());
    exit(0);
 }
 .
 .
 .

Note: Also see the setpgid example.

RELATED FUNCTIONS

getppid