libssh2_sftp_fsync - synchronize file to disk

       Added in libssh2 1.4.4 and OpenSSH 6.3.

       This function causes the remote server to synchronize the file data and metadata to disk (like fsync(2)).

       For this to work requires fsync@openssh.com support on the server.

       handle - SFTP File Handle as returned by libssh2_sftp_open_ex(3)

LIBSSH2_ERROR_ALLOC - An internal memory allocation call failed.

       LIBSSH2_ERROR_SOCKET_SEND - Unable to send data on socket.

       LIBSSH2_ERROR_SFTP_PROTOCOL  -  An  invalid SFTP protocol response was received on the socket, or an SFTP
       operation caused an errorcode to be returned by the server. In particular, this can be  returned  if  the
       SSH  server  does  not  support  the  fsync operation: the SFTP subcode LIBSSH2_FX_OP_UNSUPPORTED will be
       returned in this case.

       libssh2_sftp_fsync - synchronize file to disk

       Returns   0   on   success   or   negative   on  failure.  If  used  in  non-blocking  mode,  it  returns
       LIBSSH2_ERROR_EAGAIN when it would otherwise block. While LIBSSH2_ERROR_EAGAIN is a negative  number,  it
       is not really a failure per se.

fsync(2)

libssh2                                            8 Apr 2013                              libssh2_sftp_fsync(3)

       #include <libssh2.h>
       #include <libssh2_sftp.h>

       int
       libssh2_sftp_fsync(LIBSSH2_SFTP_HANDLE *handle)