strange file in /tmp

[Suvayu Ali]

Hi everyone,

I was trying to clean my /tmp with tmpwatch and noticed a really large
file sitting there, and I have no clue what could have generated that.
Anyone has any ideas?

$ lt /tmp/magick-XXWa5SP9.pam
-rw-rw-r--. 1 <me> <me> 13G Oct 29 01:47 /tmp/magick-XXWa5SP9.pam

$ file /tmp/magick-XXWa5SP9.pam
/tmp/magick-XXWa5SP9.pam: Netpbm PAM image file

$ stat /tmp/magick-XXWa5SP9.pam
  File: `/tmp/magick-XXWa5SP9.pam'
  Size: 13651351424	Blocks: 26662808   IO Block: 4096   regular file
Device: 802h/2050d	Inode: 91061       Links: 1
Access: (0664/-rw-rw-r--)  Uid: (  <my_uid>/  <me>)   Gid: (  <my_gid>/  <me>)
Access: 2010-10-29 01:47:17.261127261 -0700
Modify: 2010-10-29 01:47:16.963020730 -0700
Change: 2010-10-29 01:47:16.963020730 -0700

[Mike Klinke]

Have you been using ImageMagick (convert, display) for image manipulation? 
It uses /tmp as a temporary location while processing images.

Regards, Mike Klinke

[Suvayu Ali]

Hi,

On Saturday 30 October 2010 08:28 AM, Mike Klinke wrote:
> Have you been using ImageMagick (convert, display) for image
> manipulation? It uses /tmp as a temporary location while processing
> images.

Yes I use display quite a bit and I was trying out compare yesterday,
but that was with 2 files less than 30kb. Could that have generated a
13G file?
> Regards, Mike Klinke

Thanks for the response.

[stan]

On Sat, 30 Oct 2010 10:29:26 -0700
Suvayu Ali  wrote:
> Hi,
>
> On Saturday 30 October 2010 08:28 AM, Mike Klinke wrote:
> > Have you been using ImageMagick (convert, display) for image
> > manipulation? It uses /tmp as a temporary location while processing
> > images.
>
> Yes I use display quite a bit and I was trying out compare yesterday,
> but that was with 2 files less than 30kb. Could that have generated a
> 13G file?

Easy way to check.  Delete the file (it is in /tmp, after all) and then
run ImageMagick again on the same two files while watching /tmp.

[Suvayu Ali]

On 30 October 2010 11:17, stan  wrote:
> Easy way to check.  Delete the file (it is in /tmp, after all) and then
> run ImageMagick again on the same two files while watching /tmp.

I tried those, doesn't seem to reproduce the file (or any file for
that matter). As far as I recall I tried two things which I don't
usually do,

$ convert image1.png image2.png output.png

and from a remote host,

$ cat image.png | ssh <localhost> display

The 2nd one although brought up an ImageMagick window, didn't display
the image file both times.

I have a hunch if ImageMagick is the author of the tempfile, it is
probably the 2nd thing I tried.

Thanks for the suggestions everyone.

[Cameron Simpson]

On 30Oct2010 18:53, suvayu ali  wrote:
| On 30 October 2010 11:17, stan  wrote:
| > Easy way to check.  Delete the file (it is in /tmp, after all) and then
| > run ImageMagick again on the same two files while watching /tmp.
| 
| I tried those, doesn't seem to reproduce the file (or any file for
| that matter). As far as I recall I tried two things which I don't
| usually do,
| 
| $ convert image1.png image2.png output.png
| 
| and from a remote host,
| 
| $ cat image.png | ssh <localhost> display
| 
| The 2nd one although brought up an ImageMagick window, didn't display
| the image file both times.

You might need to say "display -", not just "display".

[Suvayu Ali]

On Sunday 31 October 2010 08:02 PM, Cameron Simpson wrote:
> | and from a remote host,
> |
> | $ cat image.png | ssh<localhost>  display
> |
> | The 2nd one although brought up an ImageMagick window, didn't display
> | the image file both times.
>
> You might need to say "display -", not just "display".

That works! Thanks a lot. :)

[Peter G.]

suvayu ali wrote:
> Hi everyone,
>
> I was trying to clean my /tmp with tmpwatch and noticed a really large
> file sitting there, and I have no clue what could have generated that.
> Anyone has any ideas?
>
> $ lt /tmp/magick-XXWa5SP9.pam
> -rw-rw-r--. 1 <me> <me> 13G Oct 29 01:47 /tmp/magick-XXWa5SP9.pam

Just a wild guess:

magick spelled with a ck can likely only be one thing, ImageMagick (or 
GraphicsMagick), unless you are involved in the study of Olde Englyshe.