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Jan Scheer
5258dec9a8
* tail: fix race condition (fix #3765) There exists a race condition (RC) that can occur if changes to a path happen after the initial print loop in `uu_tail()`, but before the path is added to the notify-Watcher thread in `follow()`. To minimize the window where the RC can occur, this moves starting the Watcher thread and adding paths to it from `follow()` to the initial print loop in `uu_tail()`. Additionally, to make sure the RC cannot happen in "gnu/tests/tail-2/F-headers.sh", the error message that is used as a trigger in this test, is delayed until the path is added to the Watcher thread. * build-gnu: remove workarounds for tail Remove workarounds for "tests/tail-2/F-headers.sh" which are (presumably) no longer needed because of the race condition fix. * build-gnu: remove workarounds for tail Remove workarounds for "tests/tail-2/F-headers.sh" which are (presumably) no longer needed because of the race condition fix. * tail: refactor to minimize chances of RC Move "adding paths to Watcher thread" to its own loop and run this loop before the initial tail-print-loop in order to minimize the window for race conditions.