/lib/udev/gpsd.hotplug is in gpsd 3.4-2ubuntu0.1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 | #!/bin/sh
#
# This script is the gpsd udev handler for add/remove events on matched USB
# devices. It expects to see the following environment variables:
#
# ACTION = either "add" or "remove"
# DEVNAME = the full name of the USB device that was just activated
#
# It will accept from /etc/sysconfig/gpsd the following config variables:
#
# CONTROL_SOCKET = location of the gpsd control socket
# OPTIONS = options to be passed to gpsd on launch
#
# It hands off to gpsdctl for the actual communication with the daemon.
#
# Do not introduce bashims into this script, as we want it to continue to
# work under Ubuntu.
#
# This file is Copyright (c) 2010 by the GPSD project
# BSD terms apply: see the file COPYING in the distribution root for details.
PATH=/usr/sbin:$PATH
export PATH
if [ -r /etc/default/gpsd ]; then
. /etc/default/gpsd
elif [ -r /etc/sysconfig/gpsd ]; then
. /etc/sysconfig/gpsd
GPSD_OPTIONS=$OPTIONS
GPSD_SOCKET=$CONTROL_SOCKET
fi
if [ -n "$GPSD_OPTIONS" ]; then
export GPSD_OPTIONS
fi
if [ -n "$GPSD_SOCKET" ]; then
export GPSD_SOCKET
fi
if [ -n "$USBAUTO" ]; then
[ "$USBAUTO" = "true" ] || exit 0
fi
if [ "$ACTION" = "remove" ] ; then
if echo $DEVLINKS | grep -q /dev/gps; then
:
else
exit 0
fi
fi
logger -t "gpsd.hotplug" -p daemon.info "$ACTION" "$DEVNAME"
if [ -z "$DEVNAME" ]
then
logger -t gpsd.hotplug -p daemon.err "no device"
exit 0
fi
# In recent versions of udev, the gpsd script runs in series with
# the task that creates the real /dev/ttyUSBn device
# node. Unfortunately, the gpsd script runs BEFORE the creation of
# the node, and the node is not created until after you kill the
# gpsd script, because the gpsd script waits forever for the node
# to appear.
#
# This is a race condition, and is best fixed by running the
# actual wait/hotplug portion in the background.
{
#logger -t gpsd.hotplug -p daemon.info "waiting for" $DEVNAME
while [ -x $DEVNAME ]
do
sleep 1
done
#logger -t gpsd.hotplug -p daemon.info $DEVNAME "is active"
gpsdctl $ACTION $DEVNAME
} &
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