tests/shred/shred-passes.sh

   1 #!/bin/sh
   2 # Verify the operations done by shred
   3
   4 # Copyright (C) 2009-2024 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 # shred a single letter, which should result in
  24 # 3 random passes and a single rename.
  25 printf 1 > f || framework_failure_
  26 echo "\
  27 shred: f: pass 1/3 (random)...
  28 shred: f: pass 2/3 (random)...
  29 shred: f: pass 3/3 (random)...
  30 shred: f: removing
  31 shred: f: renamed to 0
  32 shred: f: removed" > exp || framework_failure_
  33
  34 shred -v -u f 2>out || fail=1
  35 compare exp out || fail=1
  36
  37
  38 # Likewise but for a zero length file
  39 # to bypass the data passes
  40 touch f || framework_failure_
  41 echo "\
  42 shred: f: removing
  43 shred: f: renamed to 0
  44 shred: f: removed" > exp || framework_failure_
  45
  46 shred -v -u f 2>out || fail=1
  47 compare exp out || fail=1
  48
  49
  50 # shred data 20 times and verify the passes used.
  51 # This would consume all random data between 5.93 and 8.24 inclusive.
  52 dd bs=100K count=1 if=/dev/zero | tr '\0' 'U' > Us || framework_failure_
  53 printf 1 > f || framework_failure_
  54 echo "\
  55 shred: f: pass 1/20 (random)...
  56 shred: f: pass 2/20 (ffffff)...
  57 shred: f: pass 3/20 (924924)...
  58 shred: f: pass 4/20 (888888)...
  59 shred: f: pass 5/20 (db6db6)...
  60 shred: f: pass 6/20 (777777)...
  61 shred: f: pass 7/20 (492492)...
  62 shred: f: pass 8/20 (bbbbbb)...
  63 shred: f: pass 9/20 (555555)...
  64 shred: f: pass 10/20 (aaaaaa)...
  65 shred: f: pass 11/20 (random)...
  66 shred: f: pass 12/20 (6db6db)...
  67 shred: f: pass 13/20 (249249)...
  68 shred: f: pass 14/20 (999999)...
  69 shred: f: pass 15/20 (111111)...
  70 shred: f: pass 16/20 (000000)...
  71 shred: f: pass 17/20 (b6db6d)...
  72 shred: f: pass 18/20 (eeeeee)...
  73 shred: f: pass 19/20 (333333)...
  74 shred: f: pass 20/20 (random)...
  75 shred: f: removing
  76 shred: f: renamed to 0
  77 shred: f: removed" > exp || framework_failure_
  78
  79 shred -v -u -n20 -s4096 --random-source=Us f 2>out || fail=1
  80 compare exp out || fail=1
  81
  82 # Trigger an issue in shred before v8.27 where single
  83 # bytes in the pattern space were not initialized correctly
  84 # for particular sizes, like 7,13,...
  85 # This failed under both valgrind and ASAN.
  86 for size in 1 2 6 7 8; do
  87   touch shred.pattern.umr.size
  88   shred -n4 -s$size shred.pattern.umr.size || fail=1
  89 done
  90
  91 Exit $fail