Commit 68f0f1af0f2cc75615d89234494dca043e99a73d
2009-12-17T16:57:37
utimens: work around Linux ctime bug Force a ctime update by using stat() before any utimensat call with mtime of UTIME_OMIT. But avoid extra stat()s in later calls, by doing extra work on the first instance in order to cache whether the bug is actually present. * lib/utimens.c (detect_ctime_bug): New helper function. (update_timespec): Differentiate between workaround needed for this bug vs. what is needed for systems that lack utimensat. (fdutimens, lutimens): Work around bug. Signed-off-by: Eric Blake <ebb9@byu.net>