#!/bin/sh # Verify the operations done by shred # Copyright (C) 2009-2023 Free Software Foundation, Inc. # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # You should have received a copy of the GNU General Public License # along with this program. If not, see . . "${srcdir=.}/tests/init.sh"; path_prepend_ ./src print_ver_ shred # shred a single letter, which should result in # 3 random passes and a single rename. printf 1 > f || framework_failure_ echo "\ shred: f: pass 1/3 (random)... shred: f: pass 2/3 (random)... shred: f: pass 3/3 (random)... shred: f: removing shred: f: renamed to 0 shred: f: removed" > exp || framework_failure_ shred -v -u f 2>out || fail=1 compare exp out || fail=1 # Likewise but for a zero length file # to bypass the data passes touch f || framework_failure_ echo "\ shred: f: removing shred: f: renamed to 0 shred: f: removed" > exp || framework_failure_ shred -v -u f 2>out || fail=1 compare exp out || fail=1 # shred data 20 times and verify the passes used. # This would consume all random data between 5.93 and 8.24 inclusive. dd bs=100K count=1 if=/dev/zero | tr '\0' 'U' > Us || framework_failure_ printf 1 > f || framework_failure_ echo "\ shred: f: pass 1/20 (random)... shred: f: pass 2/20 (ffffff)... shred: f: pass 3/20 (924924)... shred: f: pass 4/20 (888888)... shred: f: pass 5/20 (db6db6)... shred: f: pass 6/20 (777777)... shred: f: pass 7/20 (492492)... shred: f: pass 8/20 (bbbbbb)... shred: f: pass 9/20 (555555)... shred: f: pass 10/20 (aaaaaa)... shred: f: pass 11/20 (random)... shred: f: pass 12/20 (6db6db)... shred: f: pass 13/20 (249249)... shred: f: pass 14/20 (999999)... shred: f: pass 15/20 (111111)... shred: f: pass 16/20 (000000)... shred: f: pass 17/20 (b6db6d)... shred: f: pass 18/20 (eeeeee)... shred: f: pass 19/20 (333333)... shred: f: pass 20/20 (random)... shred: f: removing shred: f: renamed to 0 shred: f: removed" > exp || framework_failure_ shred -v -u -n20 -s4096 --random-source=Us f 2>out || fail=1 compare exp out || fail=1 # Trigger an issue in shred before v8.27 where single # bytes in the pattern space were not initialized correctly # for particular sizes, like 7,13,... # This failed under both valgrind and ASAN. for size in 1 2 6 7 8; do touch shred.pattern.umr.size shred -n4 -s$size shred.pattern.umr.size || fail=1 done Exit $fail