gpsfake 1 12 Feb 2005 gpsfake test harness for gpsd, simulating a GPS gpsfake -h -b -c interval -D debuglevel -g -l -m monitor -o options -p -s speed -v logfile gpsfake is a test harness for gpsd and its clients. It opens a pty (pseudo-TTY), launches a gpsd instance that thinks the slave side of the pty is its GPS device, and repeatedly feeds the contents of a test logfile through the master side to the GPS. gpsfake does not require root privileges, and can be run concurrently with a production gpsd instance without causing problems. The logfile may be of NMEA, SiRF-II packets, or Zodiac packets. Leading lines beginning with # will be treated as comments and ignored. The gpsd instance is run in foreground. The thread sending fake GPS data to the daemon uis run in background. The -b option enables a twirling-baton progress indicator on standard error. At termination, it reports elaped time. The -c option sets the delay between sentences in seconds. Fractional values of seconds are legal. The -g option runs gpsd under the control of gdb, the GNU debugger. The thread that will send data to the daemon instance waits until it sees the pidfile created, so you may do any setup necessary at the gdb command prompt before typing "run" to begin feeding the log to the daemon. The -l option makes the program dump a line or packet number just before each sentence is fed to the daemon. If the sentence is textual (e.g. NMEA, the text is dumped as well). The -m option specifies a monitor program inside which the daemon should be run. This option is intended to be used with valgrind1 and similar programs. The -o option specifies options to pass to the daemon. Passing "-n" is often useful. The -D option passes a -D option to the daemon: thus -D 4 is shorthand for -o "-D 4". The -p option dumps the NMEA and GPSD notifications generated by the log to standard output. The logfile is interpreted once only. (This option is intended to facilitate regression testing.) The -s option sets the baud rate for the slave tty. The default is 4800. The -v option enables more progress messages to standard error. The -h option makes gpsfake print a usage message and exit. The argument must be the name of a file containing the data to be cycled at the device. gpsfake will print a notification each time it cycles. gpsd8, xgps1, libgps3, libgpsd3, gpsprof1, gnuplot1. Eric S. Raymond esr@thyrsus.com. There is a project page for gpsd here.