The only time the mtime AND ctime will be the same but the contents has changed is if the file has changed within the same time (the same second, or whatever is the resolution the file system uses) as the last check. You can safely ignore anything that hasn't changed for 2 checks.

update: slightly stronger wording: ctime AND mtime

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re^3: (OT) indexing pdf archive content in a multiuser environment- how do i know when the content changed? by Joost
in thread (OT) indexing pdf archive content in a multiuser environment- how do i know when the content changed? by leocharre

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