tests/dd/skip-seek-past-dev

   1 #!/bin/sh
   2 # test diagnostics are printed immediately when seeking beyond device.
   3
   4 # Copyright (C) 2008-2012 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 <http://www.gnu.org/licenses/>.
  18
  19 . "${srcdir=.}/init.sh"; path_prepend_ ../src
  20 print_ver_ dd
  21
  22 # need write access to local device
  23 # (even though we don't actually write anything)
  24 require_root_
  25 require_local_dir_
  26
  27 get_device_size() {
  28   BLOCKDEV=blockdev
  29   $BLOCKDEV -V >/dev/null 2>&1 || BLOCKDEV=/sbin/blockdev
  30   $BLOCKDEV --getsize64 "$1"
  31 }
  32
  33
  34 # Get path to device the current dir is on.
  35 # Note df can only get fs size, not device size.
  36 device=$(df -P . | tail -n1 | cut -d' ' -f1) || framework_failure_
  37
  38 dev_size=$(get_device_size "$device") ||
  39   skip_ "failed to determine size of $device"
  40
  41 # Don't use shell arithmetic as older versions of dash use longs
  42 DEV_OFLOW=$(expr $dev_size + 1)
  43
  44 timeout 10 dd bs=1 skip=$DEV_OFLOW count=0 status=noxfer < "$device" 2> err
  45 test "$?" = "1" || fail=1
  46 echo "dd: 'standard input': cannot skip: Invalid argument
  47 0+0 records in
  48 0+0 records out" > err_ok || framework_failure_
  49 compare err_ok err || fail=1
  50
  51 timeout 10 dd bs=1 seek=$DEV_OFLOW count=0 status=noxfer > "$device" 2> err
  52 test "$?" = "1" || fail=1
  53 echo "dd: 'standard output': cannot seek: Invalid argument
  54 0+0 records in
  55 0+0 records out" > err_ok || framework_failure_
  56 compare err_ok err || fail=1
  57
  58 Exit $fail