2004-03-21 17:13:43

by Chip Salzenberg

[permalink] [raw]
Subject: [[email protected]: Bug#239230: nfs-kernel-server: exportfs fails to export a dir with a ``#'' (pound sign) in name even when ``#'' is given as \043]

This is an interesting one. I hope the bug is entirely in user space....

----- Forwarded message from Stoyan Genov <[email protected]> -----

Subject: Bug#239230: nfs-kernel-server: exportfs fails to export a dir with a ``#'' (pound sign) in name even when ``#'' is given as \043
From: Stoyan Genov <[email protected]>
To: Debian Bug Tracking System <[email protected]>
Date: Sun, 21 Mar 2004 18:54:14 -0500
X-Mailer: reportbug 2.48

Package: nfs-kernel-server
Version: 1:1.0.6-1
Severity: normal

According to exports(5):
[snip]
Blank lines are ignored. A pound sign ("#") introduces a comment to
the end of the line. Entries may be continued across newlines using a
backslash. If an export name contains spaces it should be quoted using
double quotes. You can also specify spaces or other unusual character
in the export name using a backslash followed by the character code as
three octal digits.
[snip]

However:

fin-rst:~# uname -a
Linux fin-rst 2.6.3-1-686 #2 Tue Feb 24 20:24:38 EST 2004 i686 GNU/Linux
fin-rst:~# ls -ld '/weird-dir-#'
drwxr-xr-x 2 root root 48 Mar 20 20:21 /weird-dir-#
fin-rst:~# grep -v '^#' /etc/exports
/weird-dir-\043 *(ro)
fin-rst:~# exportfs -r
exportfs: /etc/exports [4]: No 'sync' or 'async' option specified for export "*:/weird-dir-#".
Assuming default behaviour ('sync').
NOTE: this default has changed from previous versions

fin-rst:~# showmount -e localhost
Export list for localhost:
/weird-dir- (everyone)
^
-----------| note that the # is missing

fin-rst:~# mount 'localhost:/weird-dir-#' /mnt
mount: localhost:/weird-dir-# failed, reason given by server: Permission denied

In my humble opinion, either the documentation must be fixed to
explicitly state you cannot export a directory with a pound sign in its
name, or the parser of /etc/exports be fixed ( latter is better :-) )

Best Regards,
Stoyan Genov


-- System Information:
Debian Release: testing/unstable
APT prefers testing
APT policy: (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.6.3-1-686
Locale: LANG=C, LC_CTYPE=C

Versions of packages nfs-kernel-server depends on:
ii debconf 1.4.16 Debian configuration management sy
ii libc6 2.3.2.ds1-11 GNU C Library: Shared libraries an
ii libwrap0 7.6-ipv6.1-3 Wietse Venema's TCP wrappers libra
ii nfs-common 1:1.0.6-1 NFS support files common to client
ii sysvinit 2.85-9 System-V like init.

-- debconf information excluded




----- End forwarded message -----

--
Chip Salzenberg - a.k.a. - <[email protected]>
"I wanted to play hopscotch with the impenetrable mystery of existence,
but he stepped in a wormhole and had to go in early." // MST3K


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2004-03-22 09:54:03

by Olaf Kirch

[permalink] [raw]
Subject: Re: [[email protected]: Bug#239230: nfs-kernel-server: exportfs fails to export a dir with a ``#'' (pound sign) in name even when ``#'' is given as \043]

On Sun, Mar 21, 2004 at 12:13:25PM -0500, Chip Salzenberg wrote:
> Blank lines are ignored. A pound sign ("#") introduces a comment to
> the end of the line.

So
/weird-dir-# *(ro)
is parsed as
/weird-dir-
which is an export to the whole wide world with default options.

He should try /weird-dir-\#

Olaf
--
Olaf Kirch | Stop wasting entropy - start using predictable
[email protected] | tempfile names today!
---------------+


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2004-03-22 11:29:29

by Frank van Maarseveen

[permalink] [raw]
Subject: Re: [[email protected]: Bug#239230: nfs-kernel-server: exportfs fails to export a dir with a ``#'' (pound sign) in name even when ``#'' is given as \043]

On Mon, Mar 22, 2004 at 10:53:58AM +0100, Olaf Kirch wrote:
> On Sun, Mar 21, 2004 at 12:13:25PM -0500, Chip Salzenberg wrote:
> > Blank lines are ignored. A pound sign ("#") introduces a comment to
> > the end of the line.
>
> He should try /weird-dir-\#

IMO it is better to recognize comment only when the '#' is preceded by
white space (or start of line), similar to what /bin/sh does.


--
Frank


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