SYNOPSIS
       #include <unistd.h>

       pid_t getpgrp(void);


DESCRIPTION
       The getpgrp() function shall return the process group ID of the calling
       process.

RETURN VALUE
       The getpgrp() function shall always be successful and no  return  value
       is reserved to indicate an error.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       4.3 BSD provides a getpgrp() function that returns the process group ID
       for a specified process. Although this function supports  job  control,
       all  known  job  control shells always specify the calling process with
       this function. Thus, the simpler System V getpgrp() suffices,  and  the
       added complexity of the 4.3 BSD getpgrp() is provided by the XSI exten-
       sion getpgid().

FUTURE DIRECTIONS
       None.

SEE ALSO
       exec() , fork() , getpgid() , getpid() , getppid() , kill() , setpgid()
       ,  setsid()  ,  the  Base  Definitions  volume of IEEE Std 1003.1-2001,
       <sys/types.h>, <unistd.h>

COPYRIGHT
       Portions of this text are reprinted and reproduced in  electronic  form
       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
       Specifications  Issue  6,  Copyright  (C) 2001-2003 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open  Group.  In  the
       event of any discrepancy between this version and the original IEEE and
       The Open Group Standard, the original IEEE and The Open Group  Standard
       is  the  referee document. The original Standard can be obtained online