[clug] Weird 500 error - script not executing?

Owen Cook rcook at pcug.org.au
Sat Jul 9 04:57:09 GMT 2005

On Sat, 9 Jul 2005, Paul Wayper wrote:

> [...] Premature end of script headers: subs.cgi; referer 
> http://localhost/[...]/email.cgi
> The script is set executable by all, and I can run it and it gives the 
> outputs I expect.  It's being posted to by the referer, which is in the 
> same directory and runs fine.  I've put warn statements in the script and 
> it doesn't seem to execute them - it's as if something stops the script 
> running before it actually executes the script at all.  I've tried renaming 
> the file in desperation, to no effect.
> What other ways could apache call the script that would differ from the 
> command line?  What else could cause this problem?

1. does the shebang line point to where perl is
2. have you run the script through a dos2unix script in case you have
inherited dos carriage returns

There are three other reasons but not on the top of my head, but try
especially number 2


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