[HPADM] Re: yesterday date manipulations

From: Vic (vicryan_at_pop500.gsfc.nasa.gov)
Date: 12/29/04

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    Date: Wed, 29 Dec 2004 09:21:56 -0500
To: HAUTECOEUR Bruno <HAUTECOB@essilor.fr>, "'hpadm'" <hpux-admin@dutchworks.nl>

    Morning,

    The following perl command will give you any date, past or future.
    Just change the time - or + value to the number of days to offset.
    ___m1= minus 1, ___p1=plus 1

    # Set to Yesterday
    set -- $(perl -e 'print scalar localtime (time -1 * 86400),"\n"' | \
            awk '{print $1" "$2" "$3" "$4" "$5}'); \
            datem1="$*" daym1="$1" monthm1="$2" domm1="$3" \
            timem1="$4" yearm1="$5"

    # here domm1 will equal yesterday's date.....
    # Works for year changeover also

    # Set to today
    set -- $(perl -e 'print scalar localtime' | \
           awk '{print $1" "$2" "$3" "$4" "$5}');\
           today="$*" day="$1" month="$2" dom="$3" time="$4" year="$5"
    # All Tue Dec 28 08:55:53 2004

    # Set to tomorrow
    set -- $(perl -e 'print scalar localtime (time +1 * 86400),"\n"' | \
            awk '{print $1" "$2" "$3" "$4" "$5}'); \
            datep1="$*" dayp1="$1" monthp1="$2" domp1="$3" \
            timep1="$4" yearp1="$5"

    This works great, I use it to get a command line listing of my
    Data Protector schedule 14 days in advance.

    My thanks to whomever posted it to the net some time ago in some
    other forum.

    Vic 

    -- 
James V. Ryan
Bldg. 23, Code 585
Goddard Space Flight Center
Greenbelt, MD  20771, USA
301-286-8869
On 12/29/04 8:00 AM, "HAUTECOEUR Bruno" <HAUTECOB@ESSILOR.fr> wrote:
> 
> Hi admins
> 
> in order to get the "yesterday" date, i use the following syntax:
> 
> `TZ=MET-1METDST+24 date +%d%m%Y`
> 
> This works fine for days from 2 to 30 or 31. But it doesn't work for the 1st
> of the month. 
> 
> Do to know the way to make this work also for the 1st day ?
> 
> Regards
> 
> ________________
> Bruno HAUTECOEUR
> Architecte système Unix
> DSI / Architecture & Systèmes - Essilor International
> Tel: 33 (0)1 72 94 73 20 - Fax: 01 39 26 53 08
> mail: hautecob@essilor.fr
> 
> 
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