tests/misc/truncate-overflow.sh

   1 #!/bin/sh
   2 # Validate truncate integer overflow
   3
   4 # Copyright (C) 2008-2019 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 . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
  20 print_ver_ truncate
  21 getlimits_
  22
  23
  24 # -= overflow
  25 truncate -s-1 create-zero-len-file || fail=1
  26
  27 echo > non-empty-file
  28
  29 # signed overflow
  30 returns_ 1 truncate -s$OFF_T_OFLOW file || fail=1
  31
  32 # += signed overflow
  33 returns_ 1 truncate -s+$OFF_T_MAX non-empty-file || fail=1
  34
  35 # *= signed overflow
  36 IO_BLOCK_OFLOW=$(expr $OFF_T_MAX / $(stat -f -c%s .) + 1)
  37 returns_ 1 truncate --io-blocks --size=$IO_BLOCK_OFLOW file || fail=1
  38
  39 Exit $fail