KILLPG(2) System Calls Manual KILLPG(2)
killpg - send signal to a process group
int killpg(pgrp, sig)
int pgrp, sig;
killpg() sends the signal sig to the process group pgrp. See sigvec(2)
for a list of signals.
The real or effective user ID of the sending process must match the
real or saved set-user ID of the receiving process, unless the effec-
tive user ID of the sending process is super-user. A single exception
is the signal SIGCONT, which may always be sent to any descendant of
the current process.
0 on success.
-1 on failure and sets errno to indicate the error.
killpg() will fail and no signal will be sent if any of the following
EINVAL sig was not a valid signal number.
EPERM The effective user ID of the sending process was not
super-user, and neither its real nor effective user ID
matched the real or saved set-user ID of one or more of
the target processes.
ESRCH No processes were found in the specified process group.
kill(2V), getpgrp(2V), sigvec(2)
21 January 1990 KILLPG(2)