GPSD如何设置固定波特率

修改/etc/init.d/gpsd&＃xff0c;支持/etc/init.d/gpsd start/stop/restart

#!/bin/sh
### BEGIN INIT INFO
# Provides: gpsd
# Required-Start: $remote_fs $syslog $network
# Should-Start: bluetooth dbus udev
# Required-Stop: $remote_fs $syslog $network
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# X-Start-Before: ntp
# Short-Description: GPS33 (Global Positioning System) daemon
# Description: The gpsd service daemon is able to monitor one or
# more GPS devices connected to a host computer, making
# all data on the location and movements of the sensors
# available to be queried on TCP port 2947.
### END INIT INFO# Author: Bernd Zeimetz
#
# Please remove the "Author" lines above and replace them
# with your own name if you copy and modify this script.# Do NOT "set -e"# PATH should only include /usr/* if it runs after the mountnfs.sh script
RUNDIR&＃61;/run/gpsd
PATH&＃61;/sbin:/usr/sbin:/bin:/usr/bin
DESC&＃61;"GPS2 (Global Positioning System) daemon"
NAME&＃61;gpsd
DAEMON&＃61;/usr/sbin/$NAME
PIDFILE&＃61;$RUNDIR/$NAME.pid
SCRIPTNAME&＃61;/etc/init.d/$NAME# Exit if the package is not installed
[ -x "$DAEMON" ] || exit 0# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAMEif [ -z "$GPSD_SOCKET" ] && [ -z "$DEVICES" ]; thenGPSD_SOCKET&＃61;/var/run/gpsd.sock
fiif [ -n "$GPSD_SOCKET" ]; thenGPSD_OPTIONS&＃61;"$GPSD_OPTIONS -F $GPSD_SOCKET"
fi# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh# Define LSB log_* functions.
# Depend on lsb-base (>&＃61; 3.0-6) to ensure that this file is present.
. /lib/lsb/init-functions#
# Function that starts the daemon/service
#
do_start()
{# Return# 0 if daemon has been started# 1 if daemon was already running# 2 if daemon could not be startedbaudrate&＃61;115200mkdir -p $RUNDIR || return 2start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \|| return 1while [ $baudrate -ne 9600 ]dobaudrate&＃61;&＃96;stty speed 9600 -F $DEVICES&＃96;done start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -- \$GPSD_OPTIONS -P $PIDFILE $DEVICES \|| return 2
}#
# Function that stops the daemon/service
#
do_stop()
{# Return# 0 if daemon has been stopped# 1 if daemon was already stopped# 2 if daemon could not be stopped# other if a failure occurredstart-stop-daemon --stop --quiet --retry&＃61;TERM/30/KILL/5 --pidfile $PIDFILE --name $NAMERETVAL&＃61;"$?"[ "$RETVAL" &＃61; 2 ] && return 2# Many daemons don&＃39;t delete their pidfiles when they exit.rm -f $PIDFILEreturn "$RETVAL"
}#
# Function that sends a SIGHUP to the daemon/service
#
do_reload() {## If the daemon can reload its configuration without# restarting (for example, when it is sent a SIGHUP),# then implement that here.#start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAMEreturn 0
}case "$1" instart)if [ "$START_DAEMON" &＃61; "true" ]; then[ "$VERBOSE" !&＃61; no ] && log_daemon_msg "Starting $DESC" "$NAME"do_startcase "$?" in0|1) [ "$VERBOSE" !&＃61; no ] && log_end_msg 0 ;;2) [ "$VERBOSE" !&＃61; no ] && log_end_msg 1 ;;esacelse[ "$VERBOSE" !&＃61; no ] && \log_daemon_msg "Not starting $DESC" "$NAME" && \log_end_msg 0fi;;stop)[ "$VERBOSE" !&＃61; no ] && log_daemon_msg "Stopping $DESC" "$NAME"do_stopcase "$?" in0|1) [ "$VERBOSE" !&＃61; no ] && log_end_msg 0 ;;2) [ "$VERBOSE" !&＃61; no ] && log_end_msg 1 ;;esac;;status)status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?;;reload|force-reload)log_daemon_msg "Reloading $DESC" "$NAME"do_reloadlog_end_msg $?;;restart)## If the "reload" option is implemented then remove the# &＃39;force-reload&＃39; alias#log_daemon_msg "Restarting $DESC" "$NAME"do_stopcase "$?" in0|1)do_startcase "$?" in0) log_end_msg 0 ;;1) log_end_msg 1 ;; # Old process is still running*) log_end_msg 1 ;; # Failed to startesac;;*)# Failed to stoplog_end_msg 1;;esac;;*)echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2exit 3;;
esac:

修改systemd文件 /lib/systemd/system/gpsd.service支持service gpsd start/stop/restart

[Unit]
Description&＃61;GPS (Global Positioning System) Daemon
Requires&＃61;gpsd.socket
# Needed with chrony SOCK refclock
After&＃61;chronyd.service[Service]
Type&＃61;forking
EnvironmentFile&＃61;-/etc/default/gpsd
ExecStartPre&＃61;/bin/stty speed 115200 -F $DEVICES
ExecStart&＃61;/usr/sbin/gpsd $GPSD_OPTIONS $DEVICES[Install]
Also&＃61;gpsd.socket