To replace an important file with a new version, first get the new file onto the system in its entirety. Now a quick two step dance happens. At a minimum, rename the existing file to something else

That's not how you use rename() if you want it to be atomic, you just rename the new file over the old file. There is never a moment when the file doesn't exist. Second, you should read up on journaling filesystems, the chance for corruption is much lower and in many cases the filesystems can indeed guarantee that there will be no corruption even in the case of sudden power loss.

In reply to Re^4: Read in hostfile, modify, output by Anonymous Monk
in thread Read in hostfile, modify, output by razmeth

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