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       libssh2_trace_sethandler - set a trace output handler


       #include <libssh2.h>

       typedef void (*libssh2_trace_handler_func)(LIBSSH2_SESSION *session,
                                                  void* context,
                                                  const char *data,
                                                  size_t length);

       int libssh2_trace_sethandler(LIBSSH2_SESSION *session,
                                    void* context,
                                    libssh2_trace_handler_func callback);


       libssh2_trace_sethandler  installs  a  trace  output  handler  for your
       application.  By default, when tracing has been switched on via a  call
       to  libssh2_trace(),  all output is written to stderr.  By calling this
       method   and   passing   a   function   pointer   that   matches    the
       libssh2_trace_handler_func  prototype,  libssh2  will  call  back as it
       generates trace output.  This can be used to capture the  trace  output
       and  put it into a log file or diagnostic window.  This function has no
       effect unless libssh2 was built to support this option, and  a  typical
       "release build" might not.

       context  can  be used to pass arbitrary user defined data back into the
       callback when invoked.


       Added in libssh2 version 1.2.3