Perl system() to run a script


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# 1  
Tools Perl system() to run a script

Hello,

I'm trying to run "csso" (minify css) in a CGI script from the web panel.

That is not working: Returns error 0;

my $cmd = qq`csso stylesheet.css > stylesheet.min.css`;
system($cmd);


But that is working:

my $cmd = qq`echo 'blabla' > stylesheet.min.css`;
system($cmd);


I'm using full paths. It looks like "csso" doesn't have write permissions or something?
CentOS is the operating system.

Thanks.

Last edited by madispuk; 08-27-2013 at 08:52 AM..
# 2  
Did it work when you run it outside the perl script on the shell ?
# 3  
Yes. I even tried to run it as an apache (and it works):
su -s /bin/sh apache -c "[COMMAND]"
# 4  
I dont think you need backticks. Just try with

Code:
$cmd = qq(/path/to/csso stylesheet.css > stylesheet.min.css)

---------- Post updated at 06:06 AM ---------- Previous update was at 06:01 AM ----------

And capture the exit code by assigning system($cmd) to a variable
# 5  
Exit code:
32512

I think it means that it can't find the "csso" command.

which csso
points to
/usr/local/bin/csso
when
which echo
points to
/bin/echo

Maybe /usr/local/bin is not accessible for apache?

Last edited by madispuk; 08-27-2013 at 09:23 AM..
# 6  
system() gives the actual exit code left shifted by 8. So 32512 means the actual exit code is 255. You may need to refer csso man page to refer what this means.
# 7  
No man page and nothing in the docs about error codes. Have to find a new solution.
Thank you very much anyway!
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