Re: F14: Encfs/procmail problem setting st_atime unexpectedly

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Corinna Vinschen <vinschen <at> redhat.com> writes:

> ...

Hi,

I can confirm similar test results for mailx.
I have tested it on Fedora 14.

Heirloom Mail version 12.5 7/5/10.
$ yum list installed mailx
mailx.i686                         12.5-1.fc14                          @updates

$ yum list installed fuse-encfs
fuse-encfs.i686                       1.7.2-1.fc14                       @fedora

The objective is to test time attributes of non-encrypted (ext4 fs) and
encfs-encrypted files depending on who created/acted upon them.

Non-encrypted (ext4 fs) files test.
-----------------------------------

$ df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda7             14420896   6992248   7282168  49% /
tmpfs                  1025992       428   1025564   1% /dev/shm

$ cat /proc/mounts
...
tmpfs /dev/shm tmpfs rw,relatime 0 0
/dev/sda7 / ext4 rw,relatime,barrier=1,data=ordered 0 0

Note: relatime - default mount option

/home/jb/file1.txt       - file acted upon by myself
/home/jb/my-mbox         - file acted upon by mailx's 'save' command 

- I created/acted upon a file file1.txt

  Initial file creation:
  $ touch file1.txt
  $ ls -lc file1.txt 
  -rw-rw-r-- 1 jb jb 0 Dec 30 10:31 file1.txt
  $ ls -l file1.txt 
  -rw-rw-r-- 1 jb jb 0 Dec 30 10:31 file1.txt
  $ ls -lu file1.txt 
  -rw-rw-r-- 1 jb jb 0 Dec 30 10:31 file1.txt

  Now file is appended with text:
  $ echo "append" >> file1.txt 
  $ ls -lc file1.txt 
  -rw-rw-r-- 1 jb jb 7 Dec 30 10:34 file1.txt
  $ ls -l file1.txt 
  -rw-rw-r-- 1 jb jb 7 Dec 30 10:34 file1.txt
  $ ls -lu file1.txt 
  -rw-rw-r-- 1 jb jb 7 Dec 30 10:31 file1.txt

  Result: only ctime and mtime changed - as expected.

- mailx's 'save n /home/jb/my-mbox' created/acted upon a file my-mbox

  Initial my-mbox file creation by mail client's save command:
  $ ls -lc my-mbox 
  -rw-rw-r-- 1 jb jb 773 Dec 30 10:39 my-mbox
  $ ls -l my-mbox 
  -rw-rw-r-- 1 jb jb 773 Dec 30 10:39 my-mbox
  $ ls -lu my-mbox 
  -rw-rw-r-- 1 jb jb 773 Dec 30 10:39 my-mbox

  After my-mbox appended with mail message by mail client's save command:
  $ ls -lc my-mbox 
  -rw-rw-r-- 1 jb jb 1556 Dec 30 10:43 my-mbox
  $ ls -l my-mbox 
  -rw-rw-r-- 1 jb jb 1556 Dec 30 10:43 my-mbox
  $ ls -lu my-mbox 
  -rw-rw-r-- 1 jb jb 1556 Dec 30 10:39 my-mbox

  Result: only ctime and mtime changed - as expected.

encfs-encrypted files test.
---------------------------

$ encfs ~/.crypt-raw ~/mbox

$ df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda7             14420896   6992248   7282168  49% /
tmpfs                  1025992       428   1025564   1% /dev/shm
encfs                 14420896   6992248   7282168  49% /home/jb/mbox

$ cat /proc/mounts
...
tmpfs /dev/shm tmpfs rw,relatime 0 0
/dev/sda7 / ext4 rw,relatime,barrier=1,data=ordered 0 0
encfs /home/jb/mbox fuse.encfs
rw,nosuid,nodev,relatime,user_id=500,group_id=500,default_permissions 0 0

Note: relatime - default mount option

/home/jb/mbox/             - mountpoint dir
/home/jb/mbox/test1.txt    - file acted upon by myself
/home/jb/mbox/mbox         - file acted upon by mailx's 'save' command 

- I created/acted upon a file test1.txt

  Initial file creation:
  $ touch mbox/test1.txt
  $ ls -lc mbox/test1.txt 
  -rw-rw-r-- 1 jb jb 0 Dec 30 11:00 mbox/test1.txt
  $ ls -l mbox/test1.txt 
  -rw-rw-r-- 1 jb jb 0 Dec 30 11:00 mbox/test1.txt
  $ ls -lu mbox/test1.txt 
  -rw-rw-r-- 1 jb jb 0 Dec 30 11:00 mbox/test1.txt

  Now file is appended with text:
  $ echo "append" >> mbox/test1.txt 
  $ ls -lc mbox/test1.txt 
  -rw-rw-r-- 1 jb jb 7 Dec 30 11:02 mbox/test1.txt
  $ ls -l mbox/test1.txt 
  -rw-rw-r-- 1 jb jb 7 Dec 30 11:02 mbox/test1.txt
  $ ls -lu mbox/test1.txt 
  -rw-rw-r-- 1 jb jb 7 Dec 30 11:00 mbox/test1.txt

  $ ls -al .crypt-raw/
  total 24
  drwx------   2 jb jb  4096 Dec 30 11:00 .
  drwx------. 56 jb jb 12288 Dec 30 11:03 ..
  -rw-rw-r--   1 jb jb  1076 Dec 29 21:58 .encfs6.xml
  -rw-rw-r--   1 jb jb    15 Dec 30 11:02 NN-MKpwsiu50nui4b9XByy5C

  Result: only ctime and mtime changed - as expected.

- mailx's 'save n /home/jb/mbox/mbox' created/acted upon a file mbox

  Initial mbox file creation by mail client's save command:
  $ ls -lc mbox/mbox 
  -rw-rw-r-- 1 jb jb 773 Dec 30 11:07 mbox/mbox
  $ ls -l mbox/mbox 
  -rw-rw-r-- 1 jb jb 773 Dec 30 11:07 mbox/mbox
  $ ls -lu mbox/mbox 
  -rw-rw-r-- 1 jb jb 773 Dec 30 11:07 mbox/mbox

  After mbox appended with mail message by mail client's save command:
  $ ls -lc mbox/mbox 
  -rw-rw-r-- 1 jb jb 1546 Dec 30 11:11 mbox/mbox
  $ ls -l mbox/mbox 
  -rw-rw-r-- 1 jb jb 1546 Dec 30 11:11 mbox/mbox
  $ ls -lu mbox/mbox 
  -rw-rw-r-- 1 jb jb 1546 Dec 30 11:11 mbox/mbox

  $ ls -al .crypt-raw/
  total 28
  drwx------   2 jb jb  4096 Dec 30 11:07 .
  drwx------. 56 jb jb 12288 Dec 30 11:12 ..
  -rw-rw-r--   1 jb jb  1076 Dec 29 21:58 .encfs6.xml
  -rw-rw-r--   1 jb jb  1554 Dec 30 11:11 KvMcK-a1xgrvB36y5ebYEv7q
  -rw-rw-r--   1 jb jb    15 Dec 30 11:02 NN-MKpwsiu50nui4b9XByy5C

  Result: ctime, mtime, and atime changed - NOT as expected.

Conclusion:
On Linux, with file systems mounted with default mount option 'relatime',
on an encrypted file system (encfs) mailx deviates from conventional rules of
file times modifications.
This will cause some applications (like mutt mail client) that rely on mbox's
file times attributes to not work properly.

Corinna,
you have Red Hat's e-mail address, but I do not know if you are a dev or
a user.
We have an option to file Fedora Bugzilla bugs for procmail and mailx and let
the package maintainers take care of it.
What is your suggestion ?
 
JB

Pavarotti - Nessun Dorma 
http://www.youtube.com/watch?v=O0Sx5lbVlQA


-- 
users mailing list
users@xxxxxxxxxxxxxxxxxxxxxxx
To unsubscribe or change subscription options:
https://admin.fedoraproject.org/mailman/listinfo/users
Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines

[Index of Archives]     [Older Fedora Users]     [Fedora Announce]     [Fedora Package Announce]     [EPEL Announce]     [EPEL Devel]     [Fedora Magazine]     [Fedora Summer Coding]     [Fedora Laptop]     [Fedora Cloud]     [Fedora Advisory Board]     [Fedora Education]     [Fedora Security]     [Fedora Scitech]     [Fedora Robotics]     [Fedora Infrastructure]     [Fedora Websites]     [Anaconda Devel]     [Fedora Devel Java]     [Fedora Desktop]     [Fedora Fonts]     [Fedora Marketing]     [Fedora Management Tools]     [Fedora Mentors]     [Fedora Package Review]     [Fedora R Devel]     [Fedora PHP Devel]     [Kickstart]     [Fedora Music]     [Fedora Packaging]     [Fedora SELinux]     [Fedora Legal]     [Fedora Kernel]     [Fedora OCaml]     [Coolkey]     [Virtualization Tools]     [ET Management Tools]     [Yum Users]     [Yosemite News]     [Gnome Users]     [KDE Users]     [Fedora Art]     [Fedora Docs]     [Fedora Sparc]     [Libvirt Users]     [Fedora ARM]

  Powered by Linux