tests/tail/follow-name.sh

   1 #!/bin/sh
   2 # ensure that --follow=name does not imply --retry
   3
   4 # Copyright (C) 2011-2024 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_ tail
  21
  22 cat <<\EOF > exp || framework_failure_
  23 tail: cannot open 'no-such' for reading: No such file or directory
  24 tail: no files remaining
  25 EOF
  26 returns_ 1 timeout 10 tail --follow=name no-such > out 2> err || fail=1
  27 # Remove an inconsequential inotify warning so
  28 # we can compare against the above error
  29 sed '/inotify cannot be used/d' err > k && mv k err
  30 compare exp err || fail=1
  31
  32 # Between coreutils 8.34 and 9.5 inclusive, with inotify, tail would
  33 # have waited indefinitely when a file was moved to the same file system.
  34 # Also without inotify tail would have exited with success.
  35 cleanup_() { kill $pid 2>/dev/null && wait $pid; }
  36 fastpoll='-s.1 --max-unchanged-stats=1'  # speedup non inotify systems
  37 for inotify in '' '---disable-inotify'; do
  38   touch file || framework_failure_
  39   timeout 10 tail --follow=name $fastpoll file & pid=$!
  40   sleep .1 # Usually in tail_forever{,_inotify}() here
  41   mv file file.unfollow || framework_failure_
  42   wait $pid
  43   test $? = 1 || fail=1
  44   rm -f file file.unfollow || framework_failure_
  45 done
  46
  47 Exit $fail