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PROLOG
       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of
       this interface may differ (consult the corresponding Linux  manual  page  for  details  of
       Linux behavior), or the interface may not be implemented on Linux.


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 POSIX.1‐2008, <sys_types.h>, <unistd.h>


COPYRIGHT
       Portions of this text are reprinted and  reproduced  in  electronic  form  from  IEEE  Std
       1003.1,  2013  Edition,  Standard  for Information Technology -- Portable Operating System
       Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013  by  the
       Institute  of  Electrical  and  Electronics  Engineers,  Inc and The Open Group.  (This is
       POSIX.1-2008 with the  2013  Technical  Corrigendum  1  applied.)  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.unix.org/online.html .

       Any  typographical  or  formatting errors that appear in this page are most likely to have
       been introduced during the conversion of the source files to man page  format.  To  report
       such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .