From: Reiner Steib <4.uce.03.r.s@nurfuerspam.de>
Cc: Jesper Harder <harder@ifa.au.dk>, Richard Stallman <rms@gnu.org>
Subject: Re: Possible problem with Gnus
Date: Wed, 12 May 2004 11:59:42 +0200 [thread overview]
Message-ID: <v9fza60xv5.fsf@marauder.physik.uni-ulm.de> (raw)
In-Reply-To: m3sme7hqmx.fsf@multivac.cwru.edu
On Tue, May 11 2004, Paul Jarc wrote:
> Reiner Steib <4.uce.03.r.s@nurfuerspam.de> wrote:
>> E.g. xdvi is launched as "xdvi -safer %s".
>
> What if the attachment's filename contains characters that would be
> dangerous for the shell? Does Gnus use the filename in the message,
> or generate its own?
Gnus creates a new temporary directory[1]. The filename is rewritten
using `mm-file-name-rewrite-functions'[1,2] in order to avoid
dangerous characters.
(Cc-ing Jesper Harder, who improved `mm-file-name-rewrite-functions'
recently.) I wonder if e.g. »`« and »&« should be removed too.
Jesper, could you explain why those are not deleted in
`mm-file-name-delete-gotchas'? Testing... Okay, Gnus already seems
to do proper quoting:
[2. application/postscript; dan`ls`erous.ps]
-> »Displaying gv -safer /tmp/ste/emm.11740F6T/dan\`ls\`erous.ps...«.
Bye, Reiner.
[1] See the function `mm-display-external' in `mm-decode.el':
--8<---------------cut here---------------start------------->8---
(let* ((dir (mm-make-temp-file
(expand-file-name "emm." mm-tmp-directory) 'dir))
(filename (or
(mail-content-type-get
(mm-handle-disposition handle) 'filename)
(mail-content-type-get
(mm-handle-type handle) 'name)))
[...]
file buffer)
;; We create a private sub-directory where we store our files.
(set-file-modes dir 448)
(if filename
(setq file (expand-file-name
(gnus-map-function mm-file-name-rewrite-functions
(file-name-nondirectory filename))
dir))
(setq file (mm-make-temp-file (expand-file-name "mm." dir))))
--8<---------------cut here---------------end--------------->8---
[2]
,----[ (info "(emacs-mime)Files and Directories") ]
| `mm-file-name-rewrite-functions'
| A list of functions used for rewriting file names of MIME parts.
| Each function is applied successively to the file name.
| Ready-made functions include
|
| `mm-file-name-delete-control'
| Delete all control characters.
|
| `mm-file-name-delete-gotchas'
| Delete characters that could have unintended consequences
| when used with flawed shell scripts, i.e. `|', `>' and `<';
| and `-', `.' as the first character.
`----
--
,,,
(o o)
---ooO-(_)-Ooo--- PGP key available via WWW http://rsteib.home.pages.de/
next prev parent reply other threads:[~2004-05-12 9:59 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-09 23:07 Gnus for next release Miles Bader
2004-05-09 23:19 ` John Wiegley
2004-05-09 23:29 ` Stefan Monnier
2004-05-09 23:54 ` Miles Bader
2004-05-10 7:34 ` Frank Schmitt
2004-05-10 8:31 ` David Kastrup
2004-05-10 10:04 ` Reiner Steib
2004-05-11 12:22 ` Possible problem with Gnus Richard Stallman
2004-05-11 12:40 ` David Kastrup
2004-05-12 19:40 ` Richard Stallman
2004-05-11 13:48 ` Stefan Monnier
2004-05-11 16:07 ` Reiner Steib
2004-05-11 16:31 ` Paul Jarc
2004-05-12 9:59 ` Reiner Steib [this message]
2004-05-12 14:15 ` Paul Jarc
2004-05-12 15:48 ` Jesper Harder
2004-05-12 16:39 ` Reiner Steib
2004-05-12 15:36 ` Jesper Harder
2004-05-11 17:51 ` Stefan Monnier
2004-05-12 9:59 ` Reiner Steib
2004-05-12 10:34 ` David Kastrup
2004-05-13 15:45 ` Richard Stallman
2004-05-13 17:25 ` David Kastrup
2004-05-13 17:59 ` Stefan Monnier
2004-05-13 19:07 ` David Kastrup
2004-05-14 21:01 ` Richard Stallman
2004-05-14 21:18 ` David Kastrup
2004-05-15 18:33 ` Richard Stallman
2004-05-23 3:46 ` Andy Tai
2004-05-23 3:48 ` Andy Tai
2004-05-10 17:54 ` Gnus for next release Richard Stallman
2004-05-10 18:23 ` David Kastrup
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