plan9 man page for killpg

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 tar-
       get 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 4.15 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)