diff options
Diffstat (limited to 'recipes-navigation/gpsd/gpsd/gpsd_ubx_settime.sh')
| -rwxr-xr-x | recipes-navigation/gpsd/gpsd/gpsd_ubx_settime.sh | 78 |
1 files changed, 53 insertions, 25 deletions
diff --git a/recipes-navigation/gpsd/gpsd/gpsd_ubx_settime.sh b/recipes-navigation/gpsd/gpsd/gpsd_ubx_settime.sh index 5644d57..f74e7b0 100755 --- a/recipes-navigation/gpsd/gpsd/gpsd_ubx_settime.sh +++ b/recipes-navigation/gpsd/gpsd/gpsd_ubx_settime.sh @@ -1,36 +1,63 @@ #!/bin/bash # PPS= 1484247472.29561104 clock= 1484247990.00000000 offset= 517.704388959 +# DEBUG=1 to set debug +NAME=gpsd_ubx_settime +shopt -s expand_aliases +alias LG="logger -t $NAME" +function kill_it +{ + cmd=$1 + pid=$2 + sig=$3 + ((DEBUG)) && LG -p user.info "terminating $cmd(${pid}) with SIG${sig}" + kill -SIG${sig} ${pid} + result=$? + ((DEBUG)) && LG -p user.info "kill -SIG${sig} ${pid} result is $result" +} trap "stty echo icanon" exit OIFS=$IFS IFS=$'\n' -if ! /usr/sbin/gpsd_ubx_fixed ; then - logger -s -p user.warn "GPS does not have a fix yet. Try again later." +if ! /usr/sbin/gpsd_ubx_fixed </dev/null ; then + LG -s -p user.warn "GPS does not have a fix yet. Try again later." exit 1 fi -# This shell script is shaped by two things: -# Lousy performance of sed and grep when used with gpsmon -# Need to terminate -# Terminate gpsmon after 10 seconds if it is our child -( - sleep 10 - ppid=$$ - gpsmonpid=$(ps -o pid,ppid,comm -e | egrep "[[:space:]]${ppid}[[:space:]]+gpsmon$" | sed -r 's/^[[:space:]]*([0-9]*)[[:space:]]+.*/\1/') - if ((${#gpsmonpid})) ; then - logger -p user.info "terminating gpscat(${gpsmonpid}) with SIGTERM" - kill ${gpsmonpid} - else - exit 0 - fi - sleep 2 - gpsmonpid=$(ps -o pid,ppid,comm -e | egrep "[[:space:]]${ppid}[[:space:]]+gpsmon$" | sed -r 's/^[[:space:]]*([0-9]*)[[:space:]]+.*/\1/') - if ((${#gpsmonpid})) ; then - logger -p user.info "terminating gpscat(${gpsmonpid}) with SIGKILL" - kill -9 ${gpsmonpid} - fi -) & - + + +# Terminate gpsmon after 10 seconds if it is our child +# gpsmon has issues with terminals and stalling on terminal +# read of the console. +( + sleep 10 + ppid=$BASHPID + pgid=$(ps --no-heading -o pgid -p $ppid) + + if ((${#pgid} == 0)) ; then + LG -p user.err "Could not find a pgid for $ppid" + ps -fjp $ppid | LG -p user.error + fi + + gpsmonpid=$(pgrep -lg $pgid | egrep '[[:space:]]gpsmon$' | sed 's/[[:space:]].*//') + ((DEBUG)) && LG -p user.info "$pgid is pgid $gpsmonpid is gpsmonpid" + # Find the gpsmonpid that is our grandchild + ((didkill=0)) + + # for loop is in case gpsmonpid has children. + for p in ${gpsmonpid} ; do + if ((${#p})) ; then + kill_it gpsmon $p TERM + ((didkill=p)) + break + fi + done + if ((didkill == 0)) ; then + exit 0 + fi + # Do a sigkill to be sure. + sleep 2 + kill_it gpsmon $didkill KILL +) & epoch=$(gpsmon -a 2>&1 | ( while read ln ; do if [[ $ln =~ ^[[:space:]]*PPS=.*clock=[[:space:]]*([0-9]*)\. ]] ; then @@ -39,9 +66,10 @@ epoch=$(gpsmon -a 2>&1 | ( while read ln ; do fi done )) if [[ $epoch =~ ^[0-9]+$ ]] ; then + LG -p user.warn "Updating time to epoch time, ${epoch}." date +%s -s @${epoch} >/dev/null else - logger user.err "gpsmon output is bad." + LG -p user.err "gpsmon output is bad." exit 1 fi exit 0 |