On Sunday, 18 January 2015 at 11:21:52 UTC, Marc Schütz wrote:
It's not different, and if you're still doing the O_EXCL open afterwards, it's safe. I just assumed you were going to use the generated filename without a further check. This is then unsafe, no matter how the UUID is generated, and depending on the RNG that's been used, they can be quite predictable. Granted, the risk is low, but still...
tmpfile is more predictable: it generates sequential file names.
