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Message #76023
[Bug 1243367] Re: tar complains about changed directory which hasn't changed
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: tar (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1243367
Title:
tar complains about changed directory which hasn't changed
Status in tar package in Ubuntu:
Confirmed
Bug description:
I'm using Ubuntu 14.04 dev with tar 1.26+dfsg-8 and sometimes I'm
seeing the message "tar: .: file changed as we read it" which seems to
not be true. This bugs seems to be very difficult to reproduce and
even the reproducing behavior is really annoying. As I got today on
testing the chance for easy reproducing I have made a look with
inotifywait what is happening:
sworddragon@ubuntu:~$ mkdir tmp
sworddragon@ubuntu:~$ inotifywait -mr tmp &
[1] 12445
sworddragon@ubuntu:~$ Setting up watches. Beware: since -r was given, this may take a while!
Watches established.
^C
sworddragon@ubuntu:~$ cd tmp
sworddragon@ubuntu:~/tmp$ tar --exclude "*\.tar" -zcf test.tar .
tmp/ OPEN,ISDIR
tmp/ CREATE test.tar
tmp/ OPEN test.tar
tar: .: file changed as we read it
tmp/ CLOSE_NOWRITE,CLOSE,ISDIR
tmp/ MODIFY test.tar
tmp/ CLOSE_WRITE,CLOSE test.tar
sworddragon@ubuntu:~/tmp$ rm test.tar
tmp/ DELETE test.tar
sworddragon@ubuntu:~/tmp$ tar --exclude "*\.tar" -cf test.tar .
tmp/ CREATE test.tar
tmp/ OPEN test.tar
tmp/ OPEN,ISDIR
tmp/ CLOSE_NOWRITE,CLOSE,ISDIR
tmp/ MODIFY test.tar
tmp/ CLOSE_WRITE,CLOSE test.tar
sworddragon@ubuntu:~/tmp$ rm test.tar
tmp/ DELETE test.tar
sworddragon@ubuntu:~/tmp$ tar --exclude "*\.tar" -zcf test.tar .
tmp/ OPEN,ISDIR
tmp/ CREATE test.tar
tmp/ OPEN test.tar
tar: .: file changed as we read it
tmp/ CLOSE_NOWRITE,CLOSE,ISDIR
tmp/ MODIFY test.tar
tmp/ CLOSE_WRITE,CLOSE test.tar
sworddragon@ubuntu:~/tmp$ tar --exclude "*\.tar" -zcf test.tar .
tmp/ OPEN,ISDIR
tmp/ MODIFY test.tar
tmp/ OPEN test.tar
tmp/ CLOSE_NOWRITE,CLOSE,ISDIR
tmp/ MODIFY test.tar
tmp/ CLOSE_WRITE,CLOSE test.tar
The bug only appears if a compression is activated (even with -J) and the tar archive doesn't already exist (tested both multiple times). The curious is if I'm closing the terminal and open it again I'm not able to reproduce this anymore. The bug will then randomly appear whenever I'm using tar.
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