1#!/bin/sh
2# test diagnostics are printed immediately when seeking beyond device.
3
4# Copyright (C) 2008-2023 Free Software Foundation, Inc.
5
6# This program is free software: you can redistribute it and/or modify
7# it under the terms of the GNU General Public License as published by
8# the Free Software Foundation, either version 3 of the License, or
9# (at your option) any later version.
10
11# This program is distributed in the hope that it will be useful,
12# but WITHOUT ANY WARRANTY; without even the implied warranty of
13# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14# GNU General Public License for more details.
15
16# You should have received a copy of the GNU General Public License
17# along with this program.  If not, see <https://www.gnu.org/licenses/>.
18
19. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
20print_ver_ dd
21
22# need write access to local device
23# (even though we don't actually write anything)
24require_root_
25require_local_dir_
26
27get_device_size() {
28  BLOCKDEV=blockdev
29  $BLOCKDEV -V >/dev/null 2>&1 || BLOCKDEV=/sbin/blockdev
30  $BLOCKDEV --getsize64 "$1"
31}
32
33
34# Get path to device the current dir is on.
35# Note df can only get fs size, not device size.
36device=$(df --output=source . | tail -n1) || framework_failure_
37
38dev_size=$(get_device_size "$device") ||
39  skip_ "failed to determine size of $device"
40
41# Don't use shell arithmetic as older versions of dash use longs
42DEV_OFLOW=$(expr $dev_size + 1) || framework_failure_
43
44timeout 10 dd bs=1 skip=$DEV_OFLOW count=0 status=noxfer < "$device" 2> err
45test "$?" = "1" || fail=1
46echo "dd: 'standard input': cannot skip: Invalid argument
470+0 records in
480+0 records out" > err_ok || framework_failure_
49compare err_ok err || fail=1
50
51timeout 10 dd bs=1 seek=$DEV_OFLOW count=0 status=noxfer > "$device" 2> err
52test "$?" = "1" || fail=1
53echo "dd: 'standard output': cannot seek: Invalid argument
540+0 records in
550+0 records out" > err_ok || framework_failure_
56compare err_ok err || fail=1
57
58Exit $fail
59