libssh2_sftp_fsync man page
libssh2_sftp_fsync — synchronize file to disk
#include <libssh2.h> #include <libssh2_sftp.h> int libssh2_sftp_fsync(LIBSSH2_SFTP_HANDLE *handle)
This function causes the remote server to synchronize the file data and metadata to disk (like fsync(2)).
For this to work requires email@example.com support on the server.
handle - SFTP File Handle as returned by libssh2_sftp_open_ex(3)
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 isn't really a failure per se.
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.
Added in libssh2 1.4.4 and OpenSSH 6.3.