I think, since you're opening the file for write, that trying to read it in isn't really going to work.
If you run it with warnings, as a standalone file, you're more liable to see that this:
#!/usr/bin/perl -w
open(INIT, ">doit");
while (<INIT>) {
printf "%s\n", $_;
}
close INIT;
when run gives:
Filehandle INIT opened only for output at init.cgi line 3.
How about this for an even shorter solution? -- since Perl reads the entire file into memory before compilation, by runtime, the file is no longer necessary. Hence, you can do it like this:
#!/usr/bin/perl -w
unlink $0; # Delete myself!
print "Still here!\n"; # Prove that script executes okay
# Rest of code follows ...
Now:
% init.cgi
Still here!
% ls init.cgi
ls: init.cgi: No such file or directory
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