/*
* call-seq:
* Process.getpgid(pid) => integer
*
* Returns the process group ID for the given process id. Not
* available on all platforms.
*
* Process.getpgid(Process.ppid()) #=> 25527
*/
static VALUE
proc_getpgid(obj, pid)
VALUE obj, pid;
{
#if defined(HAVE_GETPGID) && !defined(__CHECKER__)
int i;
rb_secure(2);
i = getpgid(NUM2INT(pid));
if (i < 0) rb_sys_fail(0);
return INT2NUM(i);
#else
rb_notimplement();
#endif
}