topic Re: help me in Operating System - HP-UX

help me

eric_88 — Wed, 04 Sep 2002 05:30:11 GMT

hi expert,
I want to decide if the last modify time of file A is early 1 hour than file B,what can i do? how can i compare the time of two files?

Re: help me

Peter Kloetgen — Wed, 04 Sep 2002 05:42:09 GMT

Hi Eric,

you need two commands to find out...

man find

--> have a look to the -newer option, remember that you can use a reference file to compare times.

man touch

--> you can use the touch- command to create a file with a time stamp which you need

This should do it for you.

Allways stay on the bright side of life!

Peter

Re: help me

KapilRaj — Wed, 04 Sep 2002 05:47:21 GMT

ls -l filename|awk '{print $8}' gets the time.
compare them. i could not get any other leads

kaps

Re: help me

Robin Wakefield — Wed, 04 Sep 2002 06:25:04 GMT

Hi Eric,

You could use perl to get the difference in the two dates:

diff=`perl -e '{print ((stat($ARGV[0]))[9]-(stat($ARGV[1]))[9]);}' fileA fileB`

diff will now contain the number of seconds between the mod times of the 2 files.

Rgds, Robin.

Re: help me

H.Merijn Brand (procura — Wed, 04 Sep 2002 07:09:15 GMT

diff=`perl -e '{print ((stat($ARGV[0]))[9]-(stat($ARGV[1]))[9]);}' fileA fileB`
is the diff in seconds. (one hour is 3600 seconds)

Hmmm,

diff=`perl -le 'print+(-M shift)-(-M shift)' fileA fileB`
prints the diff in days (hours and seconds as fraction of days)

1 hour = 0.0416667 day

Playing dirty:

perl -le '$^T=(stat shift)[9];-M shift()>-.0417 and print "Too old"' fileA fileB