.\" $Id: libssh2_channel_read_ex.3,v 1.3 2007/02/02 16:09:12 bagder Exp $
.\"
.TH libssh2_channel_read_ex 3 "14 Dec 2006" "libssh2 0.15" "libssh2 manual"
.SH NAME
libssh2_channel_read_ex - read data from a channel stream
.SH SYNOPSIS
#include <libssh2.h>

int libssh2_channel_read_ex(LIBSSH2_CHANNEL *channel, int stream_id,
                            char *buf, size_t buflen);

int libssh2_channel_read(LIBSSH2_CHANNEL *channel, char *buf,
                         size_t buflen);

int libssh2_channel_read_stderr(LIBSSH2_CHANNEL *channel, char *buf,
                                size_t buflen);
.SH DESCRIPTION
Attempt to read data from an active 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 read from. 

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

\fIbuf\fP - pointer to storage buffer to read data into

\fIbuflen\fP - size of the buf storage

\fIlibssh2_channel_read(3)\fP and \fIlibssh2_channel_read_stderr(3)\fP are
macros.
.SH RETURN VALUE
Actual number of bytes read or negative on failure. Since version 0.15 it
returns LIBSSH2CHANNEL_EAGAIN when it would otherwise block.
.SH "SEE ALSO"