libssh2_banner_set - Man Page

#include <libssh2.h>

int
libssh2_banner_set(LIBSSH2_SESSION *session, const char *banner);

This function is DEPRECATED. Use libssh2_session_banner_set(3) instead!

session - Session instance as returned by libssh2_session_init_ex(3)

banner - A pointer to a user defined banner

Set the banner that will be sent to the remote host when the SSH session is started with libssh2_session_handshake(3)
 This is optional; a banner corresponding to the protocol and libssh2 version will be sent by default.

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.

Marked as deprecated since 1.4.0

LIBSSH2_ERROR_ALLOC -  An internal memory allocation call failed.

libssh2_session_handshake(3)

libssh2_session_banner_set(3).