tests/du/2g

   1 #!/bin/sh
   2 # Ensure that du can handle a 2GB file (i.e., a file of size 2^31 bytes)
   3 # Before coreutils-5.93, on systems with a signed, 32-bit stat.st_blocks
   4 # one of du's computations would overflow.
   5
   6 # Copyright (C) 2005-2011 Free Software Foundation, Inc.
   7
   8 # This program is free software: you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation, either version 3 of the License, or
  11 # (at your option) any later version.
  12
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20
  21 . "${srcdir=.}/init.sh"; path_prepend_ ../src
  22 print_ver_ du
  23
  24 # Creating a 2GB file counts as `very expensive'.
  25 very_expensive_
  26
  27
  28 # Get number of free kilobytes on current partition, so we can
  29 # skip this test if there is insufficient free space.
  30
  31 # This technique relies on the fact that the `Available' kilobyte
  32 # count is the number just before the one with a trailing `%'.
  33 free_kb=`df -kP .|tail -1|sed 's/ [0-9][0-9]*%.*//;s/ *$//;s/.* //'`
  34 case "$free_kb" in
  35   [0-9]*) ;;
  36   *) skip_test_ "invalid size from df: $free_kb";;
  37 esac
  38
  39 # Require about 3GB free.
  40 min_kb=3000000
  41 test $min_kb -lt $free_kb ||
  42 {
  43   skip_test_ \
  44     "too little free space on current partition: $free_kb (need $min_kb KB)"
  45 }
  46
  47 big=big
  48 rm -f $big
  49 test -t 1 || printf 'creating a 2GB file...\n'
  50 for i in `seq 100`; do
  51   # Note: 2147483648 == 2^31. Print floor(2^31/100) per iteration.
  52   printf %21474836s x >> $big || fail=1
  53   # On the final iteration, append the remaining 48 bytes.
  54   test $i = 100 && { printf %48s x >> $big || fail=1; }
  55   test -t 1 && printf 'creating a 2GB file: %d%% complete\r' $i
  56 done
  57 echo
  58
  59 du -k $big > out1 || fail=1
  60 rm -f $big
  61 sed 's/^2[0-9][0-9][0-9][0-9][0-9][0-9] '$big'$/~2M/' out1 > out
  62
  63 cat <<\EOF > exp || fail=1
  64 ~2M
  65 EOF
  66
  67 compare out exp || fail=1
  68
  69 Exit $fail