fsync

fnint fsync(int fd)

A wrapper for the POSIX fsync() function. On Windows, _commit() will be used. On macOS, fcntl(F_FULLFSYNC) will be used. The fsync() function is used to synchronize a file's in-core state with that of the disk.

This wrapper will handle retrying on EINTR.

See the C library manual for more details about fsync().

Parameters

fda file descriptor

Returns

0 on success, or -1 if an error occurred.

The return value can be used exactly like the return value from fsync().