https://bugzilla.wikimedia.org/show_bug.cgi?id=25403
Summary: Problems with wfShellExec escaping for imagemagick's
convert
Product: MediaWiki
Version: unspecified
Platform: All
URL: https://www.hackerspace.lu/w/thumb.php?f=LightOff.svg&;
width=64
OS/Version: Linux
Status: NEW
Severity: normal
Priority: Normal
Component: Images and files
AssignedTo: wikibugs-l@lists.wikimedia.org
ReportedBy: da...@hackerspace.lu
CC: gpaum...@wikimedia.org, bryan.tongm...@gmail.com
On our wiki, as well as on many others ([0],[1],[2],..) I've come across this
error report:
SvgHandler::rasterize: convert -background white -thumbnail 64x64\!
'/var/www/hackerspace.lu/www/w/images/4/4f/LightOff.svg'
PNG:'/var/www/hackerspace.lu/www/w/images/thumb/4/4f/LightOff.svg/64px-LightOff.svg.png'
2>&1
wfShellExec: '/var/www/hackerspace.lu/www/w/bin/ulimit4.sh' 180 102400 102400
'convert -background white -thumbnail 64x64\!
'\''/var/www/hackerspace.lu/www/w/images/4/4f/LightOff.svg'\''
PNG:'\''/var/www/hackerspace.lu/www/w/images/thumb/4/4f/LightOff.svg/64px-LightOff.svg.png'\''
2>&1'
thumbnail failed on syndi: error 1 "sh: wmf2eps: command not found
convert: Delegate failed `"wmf2eps" -o "%o" "%i"'.
convert: unable to open image `/tmp/magick-XXjbtgDb': No such file or
directory.
convert: unable to load module
`/usr/lib/ImageMagick-6.3.7/modules-Q16/coders/svg.la': file not found.
convert: UnableToOpenBlob `/tmp/magick-XXjbtgDb': No such file or directory.
convert: missing an image filename
`PNG:/var/www/hackerspace.lu/www/w/images/thumb/4/4f/LightOff.svg/64px-LightOff.svg.png'."
from "convert -background white -thumbnail 64x64\!
'/var/www/hackerspace.lu/www/w/images/4/4f/LightOff.svg'
PNG:'/var/www/hackerspace.lu/www/w/images/thumb/4/4f/LightOff.svg/64px-LightOff.svg.png'
2>&1"
Note that this is independent of the wiki version. The real problem is the last
message coming from convert. The "unable to load module" message is incorrect,
because the svg.la file is present and the path is correct.
I've tried executing the same command on the shell and it works flawlessly when
removing all of the single quotes. I think that convert is somehow interpreting
both arguments, source file and output file as a single argument due to some
erroneous escaping. (Removing one pair of "\'" from every argument works as
well)
I've not dug into the mw source for his though.
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