14 Dec 2018
gpspipe
1
The GPSD Project
GPSD Documentation
gpspipe
tool to connect to gpsd and retrieve sentences
gpspipe
-2
-?
-d
-D debug-level
-h
-l
-n count
-o filename
-p
-P
-r
-R
-S
-s serial-device
-t
-T timestamp-format
-u
-v
-V
-w
-x seconds
-Z
server
:port
:device
DESCRIPTION
gpspipe 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
-2 sets the split24 flag on AIS reports. Note: this option
is experimental and may be changed or removed in a future release.
-? makes gpspipe print
a usage message and exit.
-d causes gpspipe to run as a daemon.
-D [debug-level] set debug level..
-h makes gpspipe print
a usage message and exit.
-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.
-n [count] causes [count] sentences to be output.
gpspipe will then exit gracefully.
-o [filename] 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.
-p enables dumping of profiling information in JSON.
-P enables dumping of PPS drift JSON in NMEA and raw modes.
-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.
-S sets the scaled flag. This is for AIS and subframe data, but
currently appears to do nothing.
-t adds a UTC 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.
-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.
-w causes native gpsd sentences to be
output.
-x [seconds] Exit after delay of [seconds].
-Z sets the timestamp format iso8601: implies '-t'
At least one of -R, -r or -w must be specified.
You must use -o if you use -d.
EXAMPLES
When gpsd is running,
gpspipe
-r -n 100 will send one hundred raw NMEA sentences to
standard output, then exit.
When gpsd is running, gpspipe
-x 5 -w|sed -n '/TPV/{p;q}' will wait at most 5 seconds for a
TPV message, print it to stdout, then exit.
SEE ALSO
gpsd
8
,
gps
1
,
libgps
3
,
libgpsmm
3
,
gpsprof
1
,
gpsfake
1
,
gpsctl
1
,
gpscat
1
.
gpsmon
1
.
AUTHOR
Gary E. Miller gem@rellim.com.