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Full Discussion: converting 6 digit column to dates format
Top Forums UNIX for Dummies Questions & Answers converting 6 digit column to dates format Post 85382 by vino on Wednesday 5th of October 2005 06:00:47 AM
Old 10-05-2005
Change the date for /tmp/BASE as you need

gerry.txt is the file containing the 6-digit date format

Code:
#! /bin/sh
# gerry.sh
# input  071205
# output Dec 07 2005
#

# Base date is Oct 19, 2005.
touch -d "Oct 19 05" /tmp/BASE 

while read line
do
        DAY=${line%????}
        line=${line#$DAY}
        MON=${line%??}
        YR=${line#??}

        case "$MON" in
        "01") mon=Jan ;;
        "02") mon=Feb ;;
        "03") mon=Mar ;;
        "04") mon=Apr ;;
        "05") mon=May ;;
        "06") mon=Jun ;;
        "07") mon=Jul ;;
        "08") mon=Aug ;;
        "09") mon=Sep ;;
        "10") mon=Oct ;;
        "11") mon=Nov ;;
        "12") mon=Dec ;;
        esac

        touch -d "$mon $DAY $YR" /tmp/FILEOLD
        if [ "/tmp/FILEOLD" -nt "/tmp/BASE" ] ; then
        echo "$mon $DAY $YR is newer"
        else
        echo "$mon $DAY $YR is older"
        fi ;
done < gerry.txt

rm -f /tmp/BASE /tmp/FILEOLD

vino
 

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LEARN ABOUT CENTOS

dp

DP(8)								     [nmh-1.5]								     DP(8)

NAME

       dp - parse dates 822-style

SYNOPSIS

       /usr/lib/mh/dp [-form formatfile] [-format string] [-width columns] [-version] [-help] dates ...

DESCRIPTION

       Dp  is  a  program that parses dates according to the ARPA Internet standard.  It also understands many non-standard formats, such as those
       produced by TOPS-20 sites and some UNIX sites using ctime(3).  It is useful for seeing how nmh will interpret a date.

       The dp program treats each argument as a single date, and prints the date out in the official 822-format.  Hence, it  is  usually  best	to
       enclose each argument in quotes for the shell.

       To  override  the  output  format  used by dp, the -format string or -format file switches are used.  This permits individual fields of the
       address to be extracted with ease.  The string is simply a format string and the file is simply a format file.  See  mh-format(5)  for  the
       details.

       Here is the default format string used by dp:

	    %<(nodate{text})error: %{text}%|%(putstr(pretty{text}))%>

       which  says  that  if an error was detected, print the error, a `:', and the date in error.  Otherwise, output the 822-proper format of the
       date.

FILES

       $HOME/.mh_profile	  The user profile

PROFILE COMPONENTS

       None

SEE ALSO

       ap(8), Standard for the Format of ARPA Internet Text Messages (RFC-822)

DEFAULTS

       `-format' default as described above
       `-width' default to the width of the terminal

CONTEXT

       None

BUGS

       The argument to the -format switch must be interpreted as a single token by the shell that invokes dp.  Therefore, one must  usually  place
       the argument to this switch inside quotes.

MH.6.8								   11 June 2012 							     DP(8)
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