This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface

       None.

       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 .

IEEE/The Open Group                                   2017                                        KILLPG(3POSIX)

       The killpg() function shall send the signal specified by sig to the process group specified by pgrp.

       If  pgrp  is  greater  than 1, killpg(pgrp, sig) shall be equivalent to kill(-pgrp, sig). If pgrp is less
       than or equal to 1, the behavior of killpg() is undefined.

       Refer to kill().

       Thefollowingsectionsareinformative.

SendingaSignaltoAllOtherMembersofaProcessGroup
       The following example shows how the calling process could send a signal  to  all  other  members  of  its
       process  group. To prevent itself from receiving the signal it first makes itself immune to the signal by
       ignoring it.

           #include <signal.h>
           #include <unistd.h>
           ...
               if (signal(SIGUSR1, SIG_IGN) == SIG_ERR)
                   /* Handle error */;

               if (killpg(getpgrp(), SIGUSR1) == -1)
                   /* Handle error */;"

       None.

       killpg — send a signal to a process group

       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.

       None.

       Refer to kill().

getpgid(), getpid(), kill(), raise()

       The Base Definitions volume of POSIX.1‐2017, <signal.h>

       #include <signal.h>

       int killpg(pid_t pgrp, int sig);