[Bug 194477] New: 10.1-RC1 tar(1) spurious directory permission error message

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194477

            Bug ID: 194477
           Summary: 10.1-RC1 tar(1) spurious directory permission error
                    message
           Product: Base System
           Version: 10.1-RC1
          Hardware: Any
                OS: Any
            Status: Needs Triage
          Severity: Affects Only Me
          Priority: ---
         Component: bin
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: John.Marshall at riverwillow.com.au

I don't know if tar(1) is the culprit or an innocent bystander but this is what
I am seeing on 10.1-RC1 (r272468 amd64). The archive appears to be written
properly prior to generation of the error message.

Although the user is permitted to traverse the parent directory and read the -C
directory, tar(1) emits the complaint if the parent directory is not also
readable. Filesystem is UFS.

  $ tar -czf dtt.tgz -C /data/tftp/thlan .
  tar: .: Unable to continue traversing directory tree: Permission denied
  tar: Error exit delayed from previous errors.
  $ 

  $ ls -ld /data /data/tftp /data/tftp/thlan
  drwxr-xr-x  33 root  wheel  1024  2 Sep 20:13 /data
  drwxr-x--x   4 root  wheel   512 23 Apr 09:00 /data/tftp
  drwxr-x--x   3 john  wheel   512 23 Apr 10:28 /data/tftp/thlan

  # chmod o+r /data/tftp

  $ tar -czf dtt.tgz -C /data/tftp/thlan .
  $

I haven't played with 10.0 but this behaviour is different to other earlier
releases (e.g. 9.3-RELEASE doesn't do this).

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