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Top Forums Shell Programming and Scripting Calculate age of a file | calculate time difference Post 302495800 by worm on Friday 11th of February 2011 08:57:22 AM
Old 02-11-2011
Calculate age of a file | calculate time difference

Hello,

I'm trying to create a shell script (#!/bin/sh) which should tell me the age of a file in minutes...

I have a process, which delivers me all 15 minutes a new file and I want to have a monitoring script, which sends me an email, if the present file is older than 20 minutes.

To do so, I have created two variables:
Code:
CURRTIME=`date +"%H%M"`
FILETIME=`ls -l $APSYS_DAT/currency.txt | awk '{print $8}' | awk -F: '{print $1 $2}'`

Now, I could calculate: echo $CURRTIME - $FILETIME | bc

But it doesnt calculate it as time... 1305-1255 gives me 50 and not 10 minutes.

How can I calculate with time?

Thanks for your help!

Best regards

Rolf

Last edited by Franklin52; 02-14-2011 at 05:06 AM.. Reason: Please use code tags, thank you
 

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LEAVE(1)						    BSD General Commands Manual 						  LEAVE(1)

NAME
leave -- remind you when you have to leave SYNOPSIS
leave [[+]hhmm] DESCRIPTION
leave waits until the specified time (within the next 12 hours), then reminds you that you have to leave by writing to the TTY that you exe- cuted leave on. You are reminded 5 minutes and 1 minute before the actual time, at the time, and every minute thereafter. When you log off, leave exits just before it would have printed the next message. OPTIONS
hhmm The time of day is in the form hhmm where hh is a time in hours (on a 12 or 24 hour clock), and mm are minutes. However, all times are converted to a 12 hour clock, and assumed to be in the next 12 hours. An attempt to set an alarm for farther into the future will be truncated to within the next 12 hours. + If the time is preceded by '+', the alarm will go off in hours and minutes from the current time. If no argument is given, leave prompts with "When do you have to leave?". A reply of newline causes leave to exit, otherwise the reply is assumed to be a time. This form is suitable for inclusion in a ~/.login or ~/.profile. SEE ALSO
calendar(1), csh(1), sh(1) HISTORY
The leave command appeared in 3.0BSD. BUGS
In the modern age with X(7) and window multiplexing programs like window(1) and screen(1), the leave command's reminders and admonitions might not be seen if the user has the window where leave was started minimized or obscured. This all begs for a more general user notifications system to be implemented. BSD
January 19, 2002 BSD
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