libssh2_channel_free - Man Page

#include <libssh2.h>

int
libssh2_channel_free(LIBSSH2_CHANNEL *channel);

channel - Channel stream to free.

Release all resources associated with a channel stream. If the channel has not yet been closed with libssh2_channel_close(3) , it will be called automatically so that the remote end may know that it can safely free its own resources.

Return 0 on success or negative on failure.  It returns LIBSSH2_ERROR_EAGAIN when it would otherwise block. While LIBSSH2_ERROR_EAGAIN is a negative number, it is not really a failure per se.

libssh2_channel_close(3)