setpgid(p1, p2)
public
Sets the process group ID of pid (0 indicates this process) to
integer. Not available on all platforms.
static VALUE
proc_setpgid(VALUE obj, VALUE pid, VALUE pgrp)
{
rb_pid_t ipid, ipgrp;
ipid = NUM2PIDT(pid);
ipgrp = NUM2PIDT(pgrp);
if (setpgid(ipid, ipgrp) < 0) rb_sys_fail(0);
return INT2FIX(0);
}