[Labs-l] Shell scripts and CGI on Tools

Mon Sep 22 18:57:00 UTC 2014

.sh scripts are evil and should never be run via the web. .sh are backend
tools. I would look into either php or python. If you use python I can lend
a hand. Otherwise Look at file permissions 403 typcially means that the
webservice cannot read the file

On Mon, Sep 22, 2014 at 2:36 PM, <nejuje6tpztluvolq at nym.hush.com> wrote:

> Hello,
>
> I've been trying to get this to work for days and am running out of ideas.
>
> Attempting to accomplish something simple: Run a /bin/sh script via CGI
>
> The script is called server.sh and contains this:
>
>     #!/bin/sh
>     echo "Hello World<br>"
>
> It resides in /data/project/ext-lnk-discover/public_html/cgi-bin/server.sh
>
> The .lighttpd.conf is
>
>     debug.log-request-handling = "enable"
>     static-file.exclude-extensions += ( ".sh" )
>     $HTTP["url"] =~ "^cgi-bin" {
>             cgi.assign = ( "" => "" )
>     }
>
>
> http://tools.wmflabs.org/ext-lnk-discover/cgi-bin/server.sh
>
> returns "403 Forbidden"
>
> The Lighttpd error.log is long, located in
> /data/project/ext-lnk-discover/error.log, but the last two lines:
>
> 2014-09-22 18:10:19: (mod_compress.c.683) -- handling file as static file
> 2014-09-22 18:10:19: (mod_staticfile.c.389) -- NOT handling file as static
> file, extension forbidden
>
> This would suggest .sh extension is the problem, but I changed the name to
> .fcgi or whatever doesn't matter get the same error.
>
> Maybe I need to use FCGI? New .lighttpd.conf:
>
>    fastcgi.server += ( "/" =>
>      ((
>        "socket" => "/tmp/ext-lnk-discover-server.sock",
>        "bin-path" =>
> "/data/project/ext-lnk-discover/public_html/cgi-bin/server.sh",
>        "check-local" => "disable",
>        "max-procs" => 1,
>       ))
>    )
>
> Error.log now shows:
>
> 2014-09-22 18:21:20: (mod_fastcgi.c.1104) the fastcgi-backend
> /data/project/ext-lnk-discover/public_html/cgi-bin/server.sh failed to
> start:
> 2014-09-22 18:21:20: (mod_fastcgi.c.1108) child exited with status 0
> /data/project/ext-lnk-discover/public_html/cgi-bin/server.sh
> 2014-09-22 18:21:20: (mod_fastcgi.c.1111) If you're trying to run your app
> as a FastCGI backend, make sure you're using the FastCGI-enabled version.
> If this is PHP on Gentoo, add 'fastcgi' to the USE flags.
> 2014-09-22 18:21:20: (mod_fastcgi.c.1399) [ERROR]: spawning fcgi failed.
> 2014-09-22 18:21:20: (server.c.938) Configuration of plugins failed. Going
> down.
>
> (this happens on webserver restart)
>
> ------------
>
> I've tried other scripts: bash, Perl and csh with same results.
>
> I'm beginning to think the problem is security, perhaps a jailed shell on
> the Grid? Any help appreciated!
> Thanks,
> GreenC
>
> _______________________________________________
> Labs-l mailing list
> Labs-l at lists.wikimedia.org
> https://lists.wikimedia.org/mailman/listinfo/labs-l
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.wikimedia.org/pipermail/labs-l/attachments/20140922/0c7b28b7/attachment.html>