Odpověď na názor

Cituju (napr. http://pubs.opengroup.org/onlinepubs/7908799/xsh/fsync.html)

The fsync() function can be used by an application to indicate that all data for the open file description named by fildes is to be transferred to the storage device associated with the file described by fildes in an implementation-dependent manner. The fsync() function does not return until the system has completed that action or until an error is detected.

The fsync() function forces all currently queued I/O operations associated with the file indicated by file descriptor fildes to the synchronised I/O completion state. All I/O operations are completed as defined for synchronised I/O file integrity completion.

Nevim, jestli k tomuhle je potreba neco dodavat. Podle mne je uplne jasne receno, co je fsync a k cemu slouzi :)