Provided by: rt-tests_0.71-1_i386 bug

NAME

       backfire - send a signal from driver to user

DESCRIPTION

       The  backfire  driver  reads  a  numerical  string  that is sent to the
       /dev/backfire device and sends the corresponding signal to the  calling
       user  program.  Reading  from /dev/backfire returns the time of the day
       when the most recent sent request was serviced or 0, if a sent  request
       was not yet received. The time of the day is displayed in seconds since
       1970-01-01 00:00:00 UTC followed by  the  fraction  of  the  second  in
       microseconds separated by a comma.

PURPOSE

       The  backfire  driver  is normally used in combination with the program
       sendme to benchmark the performance  of  the  kernel’s  signal  sending
       capabilities.

EXAMPLES

       head -1 /dev/backfire
       0,0
       trap "echo Got signal 7" 7
       echo 7 >/dev/backfire
       Got signal 7
       head -1 /dev/backfire
       1234567890,123456

AUTHORS

       Carsten Emde <C.Emde@osadl.org>

SEE ALSO

       sendme(8)

                                      0.1                          backfire(4)