.\" $Id: libssh2_channel_write_ex.3,v 1.6 2009/03/16 23:25:14 bagder Exp $
.\"
.TH libssh2_channel_write_ex 3 "1 Jun 2007" "libssh2 0.15" "libssh2 manual"
.SH NAME
libssh2_channel_write_ex - write data to a channel stream blocking
.SH SYNOPSIS
#include <libssh2.h>

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, size_t buflen);

ssize_t
libssh2_channel_write_stderr(LIBSSH2_CHANNEL *channel, char *buf, size_t buflen);
.SH DESCRIPTION
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 \fIstream_id\fP. The SSH2 protocol currently
defines a stream ID of 1 to be the stderr substream.

\fIchannel\fP - active channel stream to write to. 

\fIstream_id\fP - substream ID number (e.g. 0 or SSH_EXTENDED_DATA_STDERR) 

\fIbuf\fP - pointer to buffer to write

\fIbuflen\fP - size of the data to write

\fIlibssh2_channel_write(3)\fP and \fIlibssh2_channel_write_stderr(3)\fP are
macros.
.SH RETURN VALUE
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 per se.
.SH ERRORS
\fILIBSSH2_ERROR_ALLOC\fP - An internal memory allocation call failed.

\fILIBSSH2_ERROR_SOCKET_SEND\fP - Unable to send data on socket.

\fILIBSSH2_ERROR_CHANNEL_CLOSED\fP - The channel has been closed.

\fILIBSSH2_ERROR_CHANNEL_EOF_SENT\fP - The channel has been requested to be
closed.
.SH SEE ALSO
.BR libssh2_channel_open_ex(3)
.BR libssh2_channel_read_ex(3)