killpg(2)killpg(2)Namekillpg - send signal to process or process group
int pgrp, sig;
The system call sends the signal sig to the process group pgrp. See
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 superuser
with the exception of the signal SIGCONT. The signal SIGCONT can 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 indi‐
cate the error.
The system call fails and a signal is not sent under the following con‐
[EINVAL] The sig is not a valid signal number.
[EPERM] The sending process is not the superuser and all of the
target processes have an effective user ID that differs
from that of the sending process.
[ESRCH] No process can be found corresponding to that specified
See Alsogetpgrp(2), kill(2), sigvec(2)killpg(2)