wrong time?

Jeff Sadowski jeff.sadowski at gmail.com
Tue May 6 15:53:15 EDT 2008


My solution

#!/bin/sh
#/etc/timecheck.sh
#
twodigit()
{
 if [ $1 -lt 10 ];then
  echo 0$1
 else
  echo $1
 fi
}

#MM=two digit month
#DD=two digit day
#HH=two digit hour in 24 hour
#mm=two digit minute
#YYYY=four digit year
seconds_since_epoch_to_MMDDHHmmYYYY()
{
year=0000
month=0
day=0
hour=0
minute=0

epochyear=1970

#just a close proximity I can be a bit off
#(a number of days) since most certs are
#good for a year period.

let secondsinminute=61
let secondsinhour=60*$secondsinminute
let secondsinday=24*$secondsinhour
let secondsinmonth=30*$secondsinday
let secondsinyear=12*$secondsinmonth

let years=$1/$secondsinyear
let year=$epochyear+$years

let subtractyears=$years*$secondsinyear
let monthsleft=$1-$subtractyears
let months=$monthsleft/$secondsinmonth
let month=$months+1

let subtractmonths=$months*$secondsinmonth
let daysleft=$monthsleft-$subtractmonths
let days=$daysleft/$secondsinday
let day=$days+1

#Since again I don't need to be exact the
#only month that has less than 30 days needs
#checked

if [ $month -eq 2 ];then
if [ $day -gt 28 ];then
day=28
fi
fi

let subtractdays=$days*$secondsinday
let hoursleft=$daysleft-$subtractdays
let hours=$hoursleft/$secondsinhour
let hour=$hours

let subtracthours=$hours*$secondsinhour
let minutesleft=$hoursleft-$subtracthours
let minutes=$minutesleft/$secondsinminute
let minute=$minutes

let subtractminutes=$minutes*$secondsinminute
let secondsleft=$minutesleft-$subtractminutes
if [ $secondsleft -gt 59 ];then
 second=59
else
 second=$secondsleft
fi
echo -n `twodigit $month``twodigit $day`
echo `twodigit $hour``twodigit $minute`$year
}

TMPFILE=/var/volatile/wpastuff

wpa_supplicant -Dmarvell -iwlan0 \
-c/etc/wpa_supplicant.conf \
-w 1>$TMPFILE 2>/dev/null &
#wait for wpa_supplicant to try and connect
sleep 5
killall wpa_supplicant
while [ "`ps|grep wpa_supplicant \
|grep -v grep`" != "" ];do
 sleep 1
done

vars=`cat $TMPFILE |grep now \
|cut -d "(" -f2|cut -d ")" -f1`
if [ "$vars" != "" ];then
 for var in $vars ;do
  let $var
 done
 let diff=$not_after-$not_before
 let halfdiff=$diff/2
 let now=$not_before+$halfdiff
 date `seconds_since_epoch_to_MMDDHHmmYYYY $now`
fi



On Mon, May 5, 2008 at 4:07 PM, Jeff Sadowski <jeff.sadowski at gmail.com> wrote:
> I have a mobile linux device that has no RTC as such if I start the
>  device to connect without setting the clock first I get
>
>  wpa_supplicant -Dmarvell -iwlan0 -c/etc/wpa_supplicant.conf -w
>  ioctl[SIOCSIWPMKSA]: Invalid argument
>  Trying to associate with 00:0b:0e:26:d2:80 (SSID='ABBA1X' freq=2437 MHz)
>  Associated with 00:0b:0e:26:d2:80
>  CTRL-EVENT-EAP-STARTED EAP authentication started
>  CTRL-EVENT-EAP-METHOD EAP vendor 0 method 25 (PEAP) selected
>  X509: Certificate not valid (now=1210001377 not_before=1156333193
>  not_after=1187869193)
>  CTRL-EVENT-TERMINATING - signal 2 received
>
>  I would like to have the device set the time automatically but only if
>  it has to.
>  Is there a way to have it try and connect first without really connecting?
>  Just have it spit the above information to a script so that it can
>  determin it needs to set the time to half way between
>  not_before=1156333193 and not_after=1187869193
>
>  Or better yet is there a way to have wpa_supplicant set the time as it
>  is connecting?
>


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