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Don't be doubly paranoid
if (! -x $filename) {
die "File $filename does not exist"
}
open(FILE, "predict -f=$filename|") ||
die "Cannot open: $fiename"
- The 'open' does the check for existance.
- The file may be deleted between the two checks.
- There can be bugs in how 'predict' works.
By the way, watch out!
-'$filename' may contain special metacharacters.
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