killpg(2)
NAME
killpg − send signal to a process group
SYNTAX
killpg(pgrp, sig)
int pgrp, sig;
DESCRIPTION
The killpg system call sends the signal sig to the process group pgrp. See sigvec(2) for a list of signals.
The sending process and members of the process group must have the same effective user ID, otherwise this call is restricted to the super-user. As a single special case the continue signal SIGCONT may be sent to any process which is a descendant of the current process.
Upon successful completion, a value of 0 is returned. Otherwise, a value of −1 is returned and the global variable errno is set to indicate the error.
DIAGNOSTICS
Killpg will fail and no signal will be sent if any of the following occur:
[EINVAL] Sig is not a valid signal number.
[ESRCH] No process can be found corresponding to that specified by pid.
[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.