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Perl system() to run a script

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# 1  
Old 08-27-2013
Tools Perl system() to run a script


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`;

But that is working:

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

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


Last edited by madispuk; 08-27-2013 at 07:52 AM..
# 2  
Old 08-27-2013
Did it work when you run it outside the perl script on the shell ?
# 3  
Old 08-27-2013
Yes. I even tried to run it as an apache (and it works):
su -s /bin/sh apache -c "[COMMAND]"
# 4  
Old 08-27-2013
I dont think you need backticks. Just try with

$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  
Old 08-27-2013
Exit code:

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

which csso
points to
which echo
points to

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

Last edited by madispuk; 08-27-2013 at 08:23 AM..
# 6  
Old 08-27-2013
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  
Old 08-27-2013
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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