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<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
This file is Copyright (c) 2010 by the GPSD project
SPDX-License-Identifier: BSD-2-clause
-->
<!DOCTYPE refentry PUBLIC
"-//OASIS//DTD DocBook XML V4.1.2//EN"
"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
<refentry id='gpspipe.1'>
<refentryinfo>
<date>17 Jun 2018</date>
</refentryinfo>
<refmeta>
<refentrytitle>gpspipe</refentrytitle>
<manvolnum>1</manvolnum>
<refmiscinfo class="source">The GPSD Project</refmiscinfo>
<refmiscinfo class="manual">GPSD Documentation</refmiscinfo>
</refmeta>
<refnamediv id='name'>
<refname>gpspipe</refname>
<refpurpose>tool to connect to gpsd and retrieve sentences</refpurpose>
</refnamediv>
<refsynopsisdiv id='synopsis'>
<cmdsynopsis>
<command>gpspipe</command>
<arg choice='opt'>-2</arg>
<arg choice='opt'>-d</arg>
<arg choice='opt'>-D <replaceable>debug-level</replaceable>
</arg>
<arg choice='opt'>-h</arg>
<arg choice='opt'>-l</arg>
<arg choice='opt'>-n <replaceable>count</replaceable>
</arg>
<arg choice='opt'>-o <replaceable>filename</replaceable>
</arg>
<arg choice='opt'>-p</arg>
<arg choice='opt'>-r</arg>
<arg choice='opt'>-R</arg>
<arg choice='opt'>-S</arg>
<arg choice='opt'>-s <replaceable>serial-device</replaceable>
</arg>
<arg choice='opt'>-t</arg>
<arg choice='opt'>-T <replaceable>timestamp-format</replaceable>
</arg>
<arg choice='opt'>-u</arg>
<arg choice='opt'>-v</arg>
<arg choice='opt'>-w</arg>
<arg choice='opt'>-x</arg>
<group>
<replaceable>server</replaceable>
<group>
<replaceable>:port</replaceable>
<group>
<replaceable>:device</replaceable>
</group>
</group>
</group>
</cmdsynopsis>
</refsynopsisdiv>
<refsect1 id='description'>
<title>DESCRIPTION</title>
<para>
<application>gpspipe</application> is a tool to connect
to <application>gpsd</application> and output the received
sentences to stdout. This makes the program useful as a pipe from
<application>gpsd</application> to another program or file. </para>
<para>
<application>gpspipe</application> does not require root
privileges, and can be run concurrently with other tools connecting
to the local <application>gpsd</application> without causing problems.</para>
<para>The output will consist of one or both of the raw NMEA or native
<application>gpsd</application> sentences. Each line can be optionally
time stamped. There is also an option to exit gracefully after a
given count of packets.</para>
<para>Optionally a server, TCP/IP port number and remote device can be given.
If omitted, <application>gpspipe</application> connects to localhost on
the default port (2947) and watches all devices opened by
<application>gpsd</application>.</para>
<para>
<application>gpspipe</application> may be run as a daemon, but
requires the -o flag for writing the output to a file.</para>
</refsect1>
<refsect1 id='options'>
<title>OPTIONS</title>
<para>-2 sets the split24 flag on AIS reports. Note: this option
is experimental and may be changed or removed in a future release.</para>
<para>-d causes <application>gpspipe</application> to run as a daemon.</para>
<para>-h makes <application>gpspipe</application> print
a usage message and exit.</para>
<para>-l causes <application>gpspipe</application> 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.</para>
<para>-n [count] causes [count] sentences to be output.
<application>gpspipe</application> will then exit gracefully.</para>
<para>-o option causes the collected data to be written to the
specified file. Use of this option is mandatory
if <application>gpspipe</application> is run as a daemon.</para>
<para>-p enables dumping of profiling information in JSON.</para>
<para>-P enables dumping of PPS drift JSON in NMEA and raw modes.</para>
<para>-r causes raw NMEA sentences to be output.</para>
<para>-R causes super-raw (gps binary) data to be output. This overrides
NMEA and gpsd output modes.</para>
<para>-s option causes the collected data to be written to the
specified serial device with settings 4800 8N1. Thus
<application>gpspipe</application> can be used with -s and -r options
to emulate a serial port hardwired to a GPS that
<application>gpsd</application> is managing.</para>
<para>-S sets the scaled flag.</para>
<para>-t adds a timestamp to each sentence output.</para>
<para>-T sets the format of the timestamp. See
<citerefentry>
<refentrytitle>strftime</refentrytitle>
<manvolnum>3</manvolnum>
</citerefentry>
for the available placeholders. Setting this option implies -t.
Default setting is "%F %T"</para>
<para>-u usec resolution time stamp, implies -t. Use -uu to output sec.usec.</para>
<para>-v causes <application>gpspipe</application> 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.</para>
<para>-V prints the version, then exits.</para>
<para>-w causes native <application>gpsd</application>sentences to be
output.</para>
<para>-x [seconds] Exit after delay of [seconds].</para>
<para>At least one of -R, -r or -w must be specified.</para>
</refsect1>
<refsect1 id='exampletitle'>
<title>EXAMPLES</title>
<para>When <application>gpsd is running</application>
<command>gpspipe
-r -n 100</command> will send one hundred raw NMEA sentences to
standard output, then exit.</para>
<para>When <application>gpsd is running</application> <command>gpspipe
-x 5 -w|sed -n '/TPV/{p;q}'</command> will wait at most 5 seconds for a
TPV message, print it to stdout, then exit.</para>
</refsect1>
<refsect1 id='see_also'>
<title>SEE ALSO</title>
<para>
<citerefentry>
<refentrytitle>gpsd</refentrytitle>
<manvolnum>8</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>gps</refentrytitle>
<manvolnum>1</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>libgps</refentrytitle>
<manvolnum>3</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>libgpsmm</refentrytitle>
<manvolnum>3</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>gpsprof</refentrytitle>
<manvolnum>1</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>gpsfake</refentrytitle>
<manvolnum>1</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>gpsctl</refentrytitle>
<manvolnum>1</manvolnum>
</citerefentry>,
<citerefentry>
<refentrytitle>gpscat</refentrytitle>
<manvolnum>1</manvolnum>
</citerefentry>.
<citerefentry>
<refentrytitle>gpsmon</refentrytitle>
<manvolnum>1</manvolnum>
</citerefentry>.
</para>
</refsect1>
<refsect1 id='maintainer'>
<title>AUTHOR</title>
<para>Gary E. Miller <email>gem@rellim.com</email>.</para>
</refsect1>
</refentry>
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