/*
 *  call-seq:
 *     File.chown(owner_int, group_int, file_name,... ) -> integer
 *  
 *  Changes the owner and group of the named file(s) to the given
 *  numeric owner and group id's. Only a process with superuser
 *  privileges may change the owner of a file. The current owner of a
 *  file may change the file's group to any group to which the owner
 *  belongs. A <code>nil</code> or -1 owner or group id is ignored.
 *  Returns the number of files processed.
 *     
 *     File.chown(nil, 100, "testfile")
 *     
 */

static VALUE
rb_file_s_chown(argc, argv)
    int argc;
    VALUE *argv;
{
    VALUE o, g, rest;
    struct chown_args arg;
    long n;

    rb_secure(2);
    rb_scan_args(argc, argv, "2*", &o, &g, &rest);
    if (NIL_P(o)) {
        arg.owner = -1;
    }
    else {
        arg.owner = NUM2INT(o);
    }
    if (NIL_P(g)) {
        arg.group = -1;
    }
    else {
        arg.group = NUM2INT(g);
    }

    n = apply2files(chown_internal, rest, &arg);
    return LONG2FIX(n);
}