@brief SSH channel Exec request from a client.
@param channel the channel
@param command the shell command to be executed
@param userdata Userdata to be passed to the callback function.
@returns 0 if the exec request is accepted
@returns 1 if the request is denied
@brief SSH channel Exec request from a client. @param channel the channel @param command the shell command to be executed @param userdata Userdata to be passed to the callback function. @returns 0 if the exec request is accepted @returns 1 if the request is denied