Don't forget that you will need to provide for stopping and restarting your script at the the time when the log file turns over to a new copy. (On the log file side, the change is often done using "rotate".) Without that, your tail command might be listening to a log that has been renamed from "logfile" to "logfile.0". You'll be listening it logfile.0, the inode that you opened, which is no longer being written to, and nothing is listening to the new day's copy of "logfile".
Just a caution.
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