There's a handy module called SelfLoader in the perl core, which lets you hide functions in the DATA section and load them on demand: 
#!/usr/bin/perl
#sloader
use SelfLoader;
foobar();

__DATA__
sub foobar {
    print "foobar!\n";
}

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Alas, there seems to be a bug with it. If you call the script above from another script via exec and close STDIN, as in 
#!/usr/bin/perl
#sloader-exec
close(STDIN);
exec "./sloader";

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it fails: 
main doesn't contain an __DATA__ token at ./sloader line 5
Anyone seen this before?

In reply to SelfLoader chokes on closed STDIN by saintmike

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