fsync

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().

int

fsync

(

int fd

)

Parameters

fd int: a file descriptor

Return Value

Type: int

0 on success, or -1 if an error occurred. The return value can be used exactly like the return value from fsync().