tests/cp/proc-short-read.sh

   1 #!/bin/sh
   2 # exercise cp's short-read failure when operating on >4KB files in /proc
   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_ cp
  21
  22 proc_large=/proc/cpuinfo  # usually > 4KiB
  23
  24 test -r $proc_large || skip_ "your system lacks $proc_large"
  25
  26 # Before coreutils-7.3, cp would copy less than 4KiB of this file.
  27 # Skip this test when run under QEmu emulation where emulated /proc files
  28 # have unstable inode numbers.
  29 cp $proc_large 1 2>err \
  30   || { fail=1
  31        grep 'replaced while being copied' err \
  32          && skip_ "File $proc_large is being replaced while being copied"; }
  33
  34 cat $proc_large > 2 || fail=1
  35
  36 # adjust varying parts
  37 del_varying='/MHz/d; /[Bb][Oo][Gg][Oo][Mm][Ii][Pp][Ss]/d;'
  38 sed "$del_varying" 1 > proc.cp || framework_failure_
  39 sed "$del_varying" 2 > proc.cat || framework_failure_
  40
  41 compare proc.cp proc.cat || fail=1
  42
  43 Exit $fail