NAME

       getpgrp - get the process group ID of the calling process

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
       extension 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 at http://www.opengroup.org/unix/online.html .