tests/dd/skip-seek-past-dev

   1 #!/bin/sh
   2 # test diagnostics are printed immediately when seeking beyond device.
   3
   4 # Copyright (C) 2008-2010 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 if test "$VERBOSE" = yes; then
  20   set -x
  21   dd --version
  22 fi
  23
  24 . $srcdir/test-lib.sh
  25
  26 # need write access to device
  27 # (even though we don't actually write anything)
  28 require_root_
  29
  30 get_device_size() {
  31   BLOCKDEV=blockdev
  32   $BLOCKDEV -V >/dev/null 2>&1 || BLOCKDEV=/sbin/blockdev
  33   $BLOCKDEV --getsize64 "$1"
  34 }
  35
  36
  37 # Get path to device the current dir is on.
  38 # Note df can only get fs size, not device size.
  39 device=$(df -P --local . | tail -n1 | cut -d' ' -f1) ||
  40   skip_test_ 'this test runs only on local file systems'
  41
  42 dev_size=$(get_device_size "$device") ||
  43   skip_test_ "failed to determine size of $device"
  44
  45 # Don't use shell arithmetic as older versions of dash use longs
  46 DEV_OFLOW=$(expr $dev_size + 1)
  47
  48 timeout 10 dd bs=1 skip=$DEV_OFLOW count=0 status=noxfer < "$device" 2> err
  49 test "$?" = "1" || fail=1
  50 echo "dd: \`standard input': cannot skip: Invalid argument
  51 0+0 records in
  52 0+0 records out" > err_ok || framework_failure
  53 compare err_ok err || fail=1
  54
  55 timeout 10 dd bs=1 seek=$DEV_OFLOW count=0 status=noxfer > "$device" 2> err
  56 test "$?" = "1" || fail=1
  57 echo "dd: \`standard output': cannot seek: Invalid argument
  58 0+0 records in
  59 0+0 records out" > err_ok || framework_failure
  60 compare err_ok err || fail=1
  61
  62 Exit $fail