tests/du/2g.sh

   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) 2005-2019 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 <https://www.gnu.org/licenses/>.
  20
  21 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  22 print_ver_ du
  23
  24 # Creating a 2GB file counts as 'very expensive'.
  25 very_expensive_
  26
  27 # Get number of free kilobytes on current partition, so we can
  28 # skip this test if there is insufficient free space.
  29 free_kb=$(df -k --output=avail . | tail -n1)
  30 case "$free_kb" in
  31   [0-9]*) ;;
  32   *) skip_ "invalid size from df: $free_kb";;
  33 esac
  34
  35 # Require about 3GB free.
  36 min_kb=3000000
  37 test $min_kb -lt $free_kb ||
  38 {
  39   skip_ \
  40     "too little free space on current partition: $free_kb (need $min_kb KB)"
  41 }
  42
  43 big=big
  44
  45 if ! fallocate -l2G $big; then
  46   rm -f $big
  47   {
  48     is_local_dir_ . || skip_ 'Not writing 2GB data to remote'
  49     for i in $(seq 100); do
  50       # Note: 2147483648 == 2^31. Print floor(2^31/100) per iteration.
  51       printf %21474836s x || fail=1
  52     done
  53     # After the final iteration, append the remaining 48 bytes.
  54     printf %48s x || fail=1
  55   } > $big || fail=1
  56 fi
  57
  58 # The allocation may be done asynchronously (BTRFS for example)
  59 sync $big || framework_failure_
  60
  61 du -k $big > out1 || fail=1
  62 rm -f $big
  63 sed 's/^2[0-9][0-9][0-9][0-9][0-9][0-9] '$big'$/~2M/' out1 > out
  64
  65 cat <<\EOF > exp || framework_failure_
  66 ~2M
  67 EOF
  68
  69 compare exp out || fail=1
  70
  71 Exit $fail