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Top Forums Shell Programming and Scripting Substracting days from current date(K shell script) Post 302512779 by aster007 on Monday 11th of April 2011 03:26:37 PM
Old 04-11-2011
Use this script with Number of days as the parameter

datefunction.ksh
Code:
 #!/bin/bash

sec2date (){
    date --utc --date "1970-01-01 $1 sec" "+%Y-%m-%d %T"
}

sec=86400
NDAYS=$1
SEC_DIFF=`expr $sec \* $NDAYS`

CURR_TS=`date "+%Y-%m-%d %T"`

dte1=`date --utc --date "$CURR_TS" +%s`
dte2=$((dte1-SEC_DIFF))

dte2op=$(sec2date $dte2)

echo "Current Timestamp:            $CURR_TS"
echo "Timestamp $1 days before:  $dte2op"
exit 0

Use like "datefunction.ksh 5"
Here 5 is the number of days
 

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BLOCKDIAG(1)						      General Commands Manual						      BLOCKDIAG(1)

NAME
blockdiag - generate block-diagram image file from spec-text file. SYNOPSIS
blockdiag [options] file DESCRIPTION
This manual page documents briefly the blockdiag commands. blockdiag is a program that generate block-diagram image file from spec-text file. OPTIONS
These programs follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included below. For a complete description, see the SEE ALSO. --version show program's version number and exit -h, --help Show summary of options -a, --antialias Pass diagram image to anti-alias filter -c FILE, --config=FILE read configurations from FILE -o FILE write diagram to FILE -f FONT, --font=FONT use FONT to draw diagram --fontmap=FONT use FONTMAP file to draw diagram -s, --separate Separate diagram images for each group -T TYPE Output diagram as TYPE format --nodoctype Do not output doctype definition tags (SVG only) --no-transparency do not make transparent background of diagram (PNG only) SEE ALSO
The programs are documented fully by http://tk0miya.bitbucket.org/blockdiag/build/html/index.html AUTHOR
blockdiag was written by Takeshi Komiya <i.tkomiya@gmail.com> This manual page was written by Kouhei Maeda <mkouhei@palmtb.net>, for the Debian project (and may be used by others). May 9, 2011 BLOCKDIAG(1)
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