Newbie writing a simple CGI to take data from a form and append it to a text file containing data from previous submissions. I checked the error log, and I seem to have two problems: I cannot open the text file because permission denied (even though I did chmod 775 on the text file), and "premature end of script headers". Here's the code: 
#!/usr/bin/perl -w

read (STDIN, $x, $ENV{'CONTENT_LENGTH'});

@data = split(/&/, $x);
@data = (@data, '======================');

open(PRES, ">>poll_results.txt") or die "could not open $!";
print PRES @data;
close PRES;

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After that it's just a series of prints to let the user know the form was submitted. (And yes, I remembered to print "Content-type: text/html\n\n", so that's not the source of the script headers error.) What in the world is going on? What's broken about this code?

In reply to Cannot open file for appending by Doe-Eyed Innocent

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