getpgrp -- Determine Process Group ID

SYNOPSIS

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

 pid_t getpgrp(void);

DESCRIPTION

getpgrp determines the process group ID of the calling process.

RETURN VALUE

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

EXAMPLE

The following code fragment illustrates the use of getgprp to determine the process group 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.

RELATED FUNCTIONS

setpgid, setsid, tcgetpgrp