getpid

getpid

Determine Process ID

Portability: POSIX.1 conforming, UNIX compatible

SYNOPSIS
DESCRIPTION
RETURN VALUE
EXAMPLE
RELATED FUNCTIONS

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 USS is not running) getpid can fail. In this case, getpid issues an OS/390 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 %d\n",
           (int) getpid(), (int) getpgrp());    exit(0);
 }

.
.
.

Note: Also see the setpgid example. [cautionend]

RELATED FUNCTIONS

getppid

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