debian man page for libssh2_channel_read_ex

libssh2_channel_read_ex(3)					  libssh2 manual					libssh2_channel_read_ex(3)

NAME
       libssh2_channel_read_ex - read data from a channel stream

SYNOPSIS
       #include <libssh2.h>

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

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

       ssize_t libssh2_channel_read_stderr(LIBSSH2_CHANNEL *channel, char *buf, size_t buflen);

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 stream_id. The SSH2 protocol currently defines a stream  ID	of  1  to  be  the
       stderr substream.

       channel - active channel stream to read from.

       stream_id - substream ID number (e.g. 0 or SSH_EXTENDED_DATA_STDERR)

       buf - pointer to storage buffer to read data into

       buflen - size of the buf storage

       libssh2_channel_read(3) and libssh2_channel_read_stderr(3) are macros.

RETURN VALUE
       Actual  number  of  bytes  read	or  negative  on  failure.  It	returns  LIBSSH2_ERROR_EAGAIN  when  it  would otherwise block. While LIB-
       SSH2_ERROR_EAGAIN is a negative number, it isn't really a failure per se.

       Note that a return value of zero (0) can in fact be a legitimate value and only signals that no payload data was read. It is not an error.

ERRORS
       LIBSSH2_ERROR_SOCKET_SEND - Unable to send data on socket.

       LIBSSH2_ERROR_CHANNEL_CLOSED - The channel has been closed.

SEE ALSO
       libssh2_poll_channel_read(3)

libssh2 0.15							    1 Jun 2007						libssh2_channel_read_ex(3)