tests/cp/proc-zero-len.sh

   1 #!/bin/sh
   2 # Ensure that cp copies contents of non-empty "regular" file with st_size==0
   3
   4 # Copyright (C) 2007-2024 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_ cp
  21
  22 touch empty || framework_failure_
  23
  24 f=/proc/cpuinfo
  25 test -r $f || f=empty
  26
  27 cat $f > out || fail=1
  28
  29 # With coreutils-6.9, this would create a zero-length "exp" file.
  30 # Skip this test on architectures like aarch64 where the inode
  31 # number of the file changed during the cp run.
  32 cp $f exp 2>err \
  33   || { fail=1;
  34        grep 'replaced while being copied' err \
  35          && skip_ "File $f is being replaced while being copied"; }
  36
  37 # Don't simply compare contents; they might differ,
  38 # e.g., if CPU freq changes between cat and cp invocations.
  39 # Instead, simply compare whether they're both nonempty.
  40 test -s out \
  41   && { rm -f out; echo nonempty > out; }
  42 test -s exp \
  43   && { rm -f exp; echo nonempty > exp; }
  44
  45 compare exp out || fail=1
  46
  47 Exit $fail