Date check script (noob)


 
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# 1  
Date check script (noob)

Hello,

I've been given the task of checking the date of expiration dates and notify when the date is 30 days away from expiration.

As stated in the Title, I'm very new to this, I did a good bit of work over the last two days to only find out I was going down the wrong path.

I'm not expecting anyone to do my work for me, just a nudge in the right direction would be great. I'm sure someone will write it up exactly but.. you get the picture Smilie I want to learn not just copy and paste.

Example:
Code:
>cat list

Valid from: Tue Dec 06 13:35:32 EST 2011 until: Thu Dec 06 13:35:32 EST 2012
Valid from: Tue Dec 06 13:35:34 EST 2011 until: Thu Dec 06 13:35:34 EST 2012
Valid from: Tue Dec 06 13:35:34 EST 2011 until: Thu Dec 06 13:35:34 EST 2011

I can say, NOT knowing every command and all of the ways to use them is an issue but I guess it's something you pick up over time.


I am now on to trying a new approach with this...

Using this command is giving me the exact day number and I'm thinking this might be the best way to do it?
Code:
 >date +%j

So if there was a way I could convert the "until: Thu Dec 06 13:35:34 EST 2011" portion to the +%j format, it might make it easier, no? If I can see that there is less than 30 days difference between the cur_date: xxx and exp_date: xxx it would be a bit easier?


Any help is appreciated,

Thank you

Moderator's Comments:
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# 2  
Please state what Operating System and version you have and what Shell you prefer. With anything to do with "date" the solution will depend on whether you have the GNU version of the "date" command.
In this case it will also depend on whether you can plan for implementation in 30 days time.
# 3  
Hello, sorry about that

SunOS 5.10 Generic_142900-01 sun4v sparc SUNW,Sun-Blade-T6300

Kornshell


# 4  
System design problem.
Any chance of intercepting the process which writes these log entries?
If it can calculate 12 months in advance, can it calculate 11 months in advance (and write a timestamp file in a machine-readable format)?

Last edited by methyl; 12-21-2011 at 03:31 PM..
 

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