tests/wc/wc-proc.sh

   1 #!/bin/sh
   2 # Test wc on /proc and /sys files.
   3
   4 # Copyright 2014-2025 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_ wc
  21
  22 # Ensure we read() /proc files to determine content length
  23 for file in /proc/version /sys/kernel/profiling; do
  24   if test -r $file; then
  25     cp -f $file copy &&
  26     wc -c < copy > exp1 || framework_failure_
  27
  28     wc -c < $file > out1 || fail=1
  29     compare exp1 out1 || fail=1
  30   fi
  31 done
  32
  33 # Ensure we handle cases where we don't read()
  34 truncate -s 2 no_read || framework_failure_
  35 # read() used when multiple of page size
  36 truncate -s 1048576 do_read || framework_failure_
  37 wc -c no_read do_read > out || fail=1
  38 cat <<\EOF > exp
  39       2 no_read
  40 1048576 do_read
  41 1048578 total
  42 EOF
  43 compare exp out || fail=1
  44
  45 # Ensure we update the offset even when not reading,
  46 # which wasn't the case from coreutils-8.27 to coreutils-9.2
  47 { wc -c; wc -c; } < no_read >  out || fail=1
  48 { wc -c; wc -c; } < do_read >> out || fail=1
  49 cat <<\EOF > exp
  50 2
  51 0
  52 1048576
  53 0
  54 EOF
  55 compare exp out || fail=1
  56
  57 # Ensure we don't read too much when reading,
  58 # as was the case on 32 bit systems
  59 # from coreutils-8.24 to coreutils-9.1
  60 if timeout 10 truncate -s1T do_read; then
  61   timeout 10 wc -c do_read || fail=1
  62 fi
  63
  64 Exit $fail