tests/shred/shred-exact.sh

   1 #!/bin/sh
   2 # Test functionality of --exact
   3
   4 # Copyright (C) 2000-2025 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_ shred
  21
  22
  23 # make sure that neither --exact nor --zero gobbles a command line argument
  24 for opt in --exact --zero; do
  25   echo a > a || framework_failure_
  26   echo bb > b || framework_failure_
  27   echo ccc > c || framework_failure_
  28
  29   shred --remove $opt a b || fail=1
  30   test -f a && fail=1
  31   test -f b && fail=1
  32
  33   shred --remove $opt c || fail=1
  34   test -f c && fail=1
  35 done
  36
  37
  38 # make sure direct I/O is handled appropriately at end of file
  39 # Create a 1MiB file as we'll probably not be using blocks larger than that
  40 # (i.e., we want to test failed writes not at the start).
  41 truncate -s1MiB file.slop || framework_failure_
  42 truncate -s+1 file.slop || framework_failure_
  43 shred --exact -n2 file.slop || fail=1
  44
  45 # make sure direct I/O is handled appropriately at start of file
  46 truncate -s1 file.slop || framework_failure_
  47 shred --exact -n2 file.slop || fail=1
  48
  49 Exit $fail