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

       killpg — send a signal to a process group

SYNOPSIS

       #include <signal.h>

       int killpg(pid_t pgrp, int sig);

DESCRIPTION

       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.

RETURN VALUE

       Refer to kill().

ERRORS

       Refer to kill().

       The following sections are informative.

EXAMPLES

   Sending a Signal to All Other Members of a Process Group
       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 */;"

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

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

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