KILLPG(3)                  Linux Programmer's Manual                 KILLPG(3)



NAME
       killpg - send signal to a process group

SYNOPSIS
       #include <signal.h>

       int killpg(int pgrp, int sig);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       killpg():
           _XOPEN_SOURCE >= 500
               || /* Since glibc 2.19: */ _DEFAULT_SOURCE
               || /* Glibc versions <= 2.19: */ _BSD_SOURCE

DESCRIPTION
       killpg() sends the signal sig to the process group pgrp.  See signal(7)
       for a list of signals.

       If pgrp is 0, killpg()  sends  the  signal  to  the  calling  process's
       process  group.   (POSIX  says: if pgrp is less than or equal to 1, the
       behavior is undefined.)

       For the permissions required to send a signal to another  process,  see
       kill(2).

RETURN VALUE
       On  success,  zero is returned.  On error, -1 is returned, and errno is
       set appropriately.

ERRORS
       EINVAL sig is not a valid signal number.

       EPERM  The process does not have permission to send the signal  to  any
              of  the  target  processes.   For  the required permissions, see
              kill(2).

       ESRCH  No process can be found in the process group specified by  pgrp.

       ESRCH  The  process  group  was given as 0 but the sending process does
              not have a process group.

CONFORMING TO
       POSIX.1-2001, POSIX.1-2008, SVr4, 4.4BSD (killpg()  first  appeared  in
       4BSD).

NOTES
       There  are  various differences between the permission checking in BSD-
       type systems and System V-type systems.  See the  POSIX  rationale  for
       kill().   A difference not mentioned by POSIX concerns the return value
       EPERM: BSD documents that no signal is sent and EPERM returned when the
       permission  check  failed  for at least one target process, while POSIX
       documents EPERM only when the permission check failed  for  all  target
       processes.

   C library/kernel differences
       On  Linux, killpg() is implemented as a library function that makes the
       call kill(-pgrp, sig).

SEE ALSO
       getpgrp(2), kill(2), signal(2), capabilities(7), credentials(7)

COLOPHON
       This page is part of release 4.16 of the Linux  man-pages  project.   A
       description  of  the project, information about reporting bugs, and the
       latest    version    of    this    page,    can     be     found     at
       https://www.kernel.org/doc/man-pages/.



Linux                             2017-09-15                         KILLPG(3)