Test if File Greater Than n Hours

[Michael42]

Hello,

In a Bourne shell script on a Solaris 8 system I am creating a flag file (/tmp/myscript.flag) when a certain action is performed. Though this script runs every 15 minutes I do not want to perform this action until my flag file is older than n hours (n may be: 6, 12 or 24 hours).

How can I test to see if the date/time of my currently running script greater than n hours from my flag file date/time?

Thanks,

Michael42

 

[PHV]

Can't you use a Korn shell ?

 

[Michael42]

PHV,

>> Can't you use a Korn shell ?

I am sorry to say that is not an option for me.

Thanks,

Michael42

 

[PHV]

I'm too lazzy to convert this to Bourne syntax but you may use it as a starting point:

GetDate(){ # GetDate nHours [format]
  typeset -i nHours=$1; format=$2
  eval $(echo $TZ | sed '
s!\([^-0-9]*\)\([-0-9]*\)\(.*\)!typeset -i localOffset=\2;zon1=\1;zon2=\3!')
  TZ=$zon1$((localOffset-nHours))$zon2 date $format
}
n=6 'or 12 or 24
touch -t $(GetDate -$n +%Y%m%d%H%M) /tmp/myscript.tst
[ -n "$(find /tmp/myscript.flag -newer /tmp/myscript.tst)" ] && exit

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ181-2886

 

[stefanwagner]

find uses '-cmin +minutes' to find files where status changed at least minutes ago.

find /your/path/to -name flagfile -cmin +360 > /dev/null && yourAction

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[PHV]

Stefan, I'm not sure the Solaris 8 find command supports all the non standard extensions of the linux/GNU versions ...

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ181-2886

 

[Ygor]

If you have perl installed...

SECS=`perl -e '@q=stat($ARGV[0]); print time-$q[9]' flagfile`
if [ $SECS -lt 10800 ]
then
    echo Less than 3 hours since last run
    exit
fi