KILLPG (2)
send signal to a process group
SYNOPSIS
#include <signal.h>
int killpg(int pgrp , int sig );
DESCRIPTION
Killpg
sends the signal
sig
to the process group
pgrp .
See
sigaction (2)
for a list of signals.
If
pgrp
is 0,
killpg
sends the signal to the sending process's process group.
The sending process and members of the process group must have the same
effective user ID, or the sender must be the super-user. As a single
special case the continue signal
SIGCONT
may be sent to any process that is a descendant of the current process.
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.
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.
EPERM
The sending process is not the super-user and one or more of the
target processes has an effective user ID different from that of the
sending process.
CONFORMING TO
SVr4, 4.4BSD (The
killpg
function call first appeared in 4.0BSD).
SEE ALSO
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