libssh2_channel_write_ex - write data to a channel stream blocking
ssize_t libssh2_channel_write_ex(LIBSSH2_CHANNEL *channel, int
stream_id, char *buf, size_t buflen);
ssize_t libssh2_channel_write(LIBSSH2_CHANNEL *channel, char *buf,
ssize_t libssh2_channel_write_stderr(LIBSSH2_CHANNEL *channel, char
*buf, size_t buflen);
Write data to a channel stream. All channel streams have one standard
I/O substream (stream_id == 0), and may have up to 2^32 extended data
streams as identified by the selected stream_id. The SSH2 protocol
currently defines a stream ID of 1 to be the stderr substream.
channel - active channel stream to write to.
stream_id - substream ID number (e.g. 0 or SSH_EXTENDED_DATA_STDERR)
buf - pointer to buffer to write
buflen - size of the data to write
libssh2_channel_write(3) and libssh2_channel_write_stderr(3) are
Actual number of bytes written or negative on failure.
LIBSSH2_ERROR_EAGAIN when it would otherwise block. While
LIBSSH2_ERROR_EAGAIN is a negative number, it isn’t really a failure
LIBSSH2_ERROR_ALLOC - An internal memory allocation call failed.
LIBSSH2_ERROR_SOCKET_SEND - Unable to send data on socket.
LIBSSH2_ERROR_CHANNEL_CLOSED - The channel has been closed.
LIBSSH2_ERROR_CHANNEL_EOF_SENT - The channel has been requested to be