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Could detect some violations of this rule. This rule applies only to untrusted file name strings, and ROSE cannot tell which strings are trusted and which are not. The best heuristic is to note if there is any verification of the file name before or after the fopen() call. If there is any verification, then the file opening should be preceded by an lstat() call and succeeded by an fstat() call. Although that does not enforce the rule completely, it does indicate that the coder is aware of the lstat-fopen-fstat idiom

Protect against file name injection

4921, 4922, 4923