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.1‐2017, <sys_types.h>, <unistd.h>

COPYRIGHT

       Portions of this text are reprinted and  reproduced  in  electronic  form  from  IEEE  Std
       1003.1-2017,  Standard  for  Information Technology -- Portable Operating System Interface
       (POSIX), The Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C)  2018  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 .

       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 .