GPSPIPE(1) GPSD Documentation GPSPIPE(1)NAMEgpspipe - tool to connect to gpsd and retrieve sentences
SYNOPSISgpspipe [-h] [-d] [-l] [-o filename] [-n count] [-r] [-R]
[-s serial-device] [-t] [-T timestamp-format] [-u] [-p] [-w]
[-S] [-2] [-v] [-D debug-level] [server [:port [:device]]]
DESCRIPTIONgpspipe is a tool to connect to gpsd and output the received sentences
to stdout. This makes the program useful as a pipe from gpsd to another
program or file.
gpspipe does not require root privileges, and can be run concurrently
with other tools connecting to the local gpsd without causing problems.
The output will consist of one or both of the raw NMEA or native gpsd
sentences. Each line can be optionally time stamped. There is also an
option to exit gracefully after a given count of packets.
Optionally a server, TCP/IP port number and remote device can be given.
If omitted, gpspipe connects to localhost on the default port (2947)
and watches all devices opened by gpsd.
gpspipe may be run as a daemon, but requires the -o flag for writing
the output to a file.
OPTIONS-h makes gpspipe print a usage message and exit.
-d causes gpspipe to run as a daemon.
-l causes gpspipe to sleep for ten seconds before attempting to connect
to gpsd. This is very useful when running as a daemon, giving gpsd time
to start before attempting a connection.
-r causes raw NMEA sentences to be output.
-R causes super-raw (gps binary) data to be output. This overrides NMEA
and gpsd output modes.
-s option causes the collected data to be written to the specified
serial device with settings 4800 8N1. Thus gpspipe can be used with -s
and -r options to emulate a serial port hardwired to a GPS that gpsd is
managing.
-o option causes the collected data to be written to the specified
file. Use of this option is mandatory if gpspipe is run as a daemon.
-w causes native gpsdsentences to be output.
-S sets the scaled flag.
-2 sets the split24 flag on AIS reports. Note: this option is
experimental and may be changed or removed in a future release.
-t adds a timestamp to each sentence output.
-T sets the format of the timestamp. See strftime(3) for the available
placeholders. Setting this option implies -t. Default setting is "%F
%T"
-u usec resolution time stamp, implies -t. Use -uu to output sec.usec.
-p enables dumping of profiling information in JSON.
-P enables dumping of PPS drift JSON in NMEA and raw modes.
-n [count] causes [count] sentences to be output. gpspipe will then
exit gracefully.
-v causes gpspipe to show a spinning activity indicator on stderr. This
is useful if stdout is redirected into a file or a pipe. By default the
spinner is advanced with every messages written; specifying -v more
than once will double the number of messages required to rotate the
spinner.
-V prints the version, then exits.
At least one of -R, -r or -w must be specified.
EXAMPLE
When gpsd is running gpspipe-r -n 100 will send one hundred raw NMEA
sentences to standard output, then exit.
SEE ALSOgpsd(8), gps(1), libgps(3), libgpsd(3), gpsprof(1), gpsfake(1),
gpsctl(1), gpscat(1). gpsmon(1).
AUTHOR
Gary E. Miller gem@rellim.com.
The GPSD Project 03 Aug 2005 GPSPIPE(1)
