tests/cp/fiemap-2

   1 #!/bin/sh
   2 # Exercise a few more corners of the fiemap-copying code.
   3
   4 # Copyright (C) 2011 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 <http://www.gnu.org/licenses/>.
  18
  19 . "${srcdir=.}/init.sh"; path_prepend_ ../src
  20 print_ver_ cp
  21
  22 # Require a fiemap-enabled FS.
  23 touch fiemap_chk # check a file rather than current dir for best coverage
  24 fiemap_capable_ fiemap_chk \
  25   || skip_ "this file system lacks FIEMAP support"
  26
  27 # Exercise the code that handles a file ending in a hole.
  28 printf x > k || framework_failure_
  29 dd bs=1k seek=128 of=k < /dev/null || framework_failure_
  30
  31 # The first time through the outer loop, the input file, K, ends with a hole.
  32 # The second time through, we append a byte so that it does not.
  33 for append in no yes; do
  34   test $append = yes && printf y >> k
  35   for i in always never; do
  36     cp --sparse=$i k k2 || fail=1
  37     cmp k k2 || fail=1
  38   done
  39 done
  40
  41 # Ensure that --sparse=always can restore holes.
  42 rm -f k
  43 # Create a file starting with an "x", followed by 256K-1 0 bytes.
  44 printf x > k || framework_failure_
  45 dd bs=1k seek=1 of=k count=255 < /dev/zero || framework_failure_
  46
  47 # cp should detect the all-zero blocks and convert some of them to holes.
  48 # How many it detects/converts currently depends on io_blksize.
  49 # Currently, on my F14/ext4 desktop, this K starts off with size 256KiB,
  50 # (note that the K in the preceding test starts off with size 4KiB).
  51 # cp from coreutils-8.9 with --sparse=always reduces the size to 32KiB.
  52 cp --sparse=always k k2 || fail=1
  53 test $(stat -c %b k2) -lt $(stat -c %b k) || fail=1
  54
  55 Exit $fail