NAME
killpg —
send signal to a process
group
LIBRARY
library “libc”
SYNOPSIS
#include
<sys/types.h>
#include <signal.h>
int
killpg(pid_t
pgrp, int sig);
DESCRIPTION
Thekillpg()
function 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 must be able to
kill() at
least one process in the receiving process group.
RETURN VALUES
The killpg() function returns the
value 0 if successful; otherwise the value -1 is returned and
the global variable errno is set to indicate the
error.
ERRORS
The killpg() function will fail and no
signal will be sent if:
- [
EINVAL] - The sig argument is not a valid signal number.
- [
ESRCH] - No process can be found in the process group specified by pgrp.
- [
EPERM] kill() returns EPERM for all processes in the process group.
SEE ALSO
HISTORY
The killpg() function appeared in
4.0BSD.