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Full Discussion: DATE TIME formatting
Homework and Emergencies Emergency UNIX and Linux Support DATE TIME formatting Post 302757031 by RudiC on Thursday 17th of January 2013 03:11:58 AM
Old 01-17-2013
This is not only not easy, but some records will be impossible to translate, be it manually or by program logic - those using two numbers below 13 for day and month in an undefined order. These will be printed to an error file. For the rest, and if your awk versions allows for it, try:
Code:
$ awk  'BEGIN {split("Jan Feb Mar Apr May Jun Jul AUg Sep Oct Nov Dec", months)}
         NR==1 {print;next}
         {n=split ($1,Dt,"[-/ :]")                                            # split all date/time info into up to 7 array elements
          if (!(Dt[1]+0))                     {Mon=Dt[1]; Day=Dt[2]}          # check if there's an alpha month's name; use it, the other element is the day
            else if (!(Dt[2]+0))              {Mon=Dt[2]; Day=Dt[1]}
                   else if (Dt[1]>12)         {Mon=months[Dt[2]]; Day=Dt[1]}  # check if there's one element greater than 12 - must be a day; use it, the other is a month
                          else if (Dt[2]>12)  {Mon=months[Dt[1]]; Day=Dt[2]}
                                 else         {print > "errorfile";next}      # all other records cannot be correctly translated

          if (Dt[7]=="PM") Dt[4]+=12                                          # handling PM may need to be refined
         
          print Day"-"Mon"-"Dt[3], Dt[4]":"Dt[5]":" sprintf ("%02d",Dt[6]+0), $2, $3, $4,$5
         }
         
        ' FS="," file
DATE,PR,ST,ONC,NOD
19-Jul-1979 18:00:00 748 1 43 1
25-Jan-1979 06:00:00 748 1 43 1
20-Jan-1979 06:00:00 748 1 43 1
31-Sep-1979 06:00:00 748 1 43 1
20-Jan-1979 06:00:00 748 1 43 1
31-Sep-1979 06:00:00 748 1 43 1
25-Jul-1979 03:00:00 748 1 43 1

The AM/PM logics may need some refinement, as does the output of the time fields in general. Regard this as an exercise for yourself...

Last edited by RudiC; 01-17-2013 at 04:24 AM..
This User Gave Thanks to RudiC For This Post:
 

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XCALPR(1)						      General Commands Manual							 XCALPR(1)

NAME
xcalpr - print xcal calendar entries SYNTAX
xcalpr [ -c ][ -x ][ -f file ][ -d dir ][ -u user ][ date-spec ] DESCRIPTION
Xcalpr prints the contents of the xcal files. It is intended to be used in situations when you have no access to an X screen. It can also be used to generate entries for the standard UNIX calendar program. With no arguments, it prints any entries that exist for the next seven days. The program also reads the contents of the seven daily files and prints them at the appropriate point in the output stream. Each line in the output is preceded by the day of the week, the day of the month, the month and the year. Xcalpr can be given a date specification to select months and years. If the date spec consists of just a year number, then all the data for that year is printed. For example: xcalpr 1994 will print all the data for 1994. Several years can be specified. If you give the name of a month, then the data for that month in the current year will be printed. If the month is in the past, then the data for that month next year will be printed. For example, if xcalpr oct jan is typed in August, xcalpr will print October in the current year and January next year. You can select a particular year by adding the number after any months that you need printing: xcalpr oct nov 1994 will print October and November in 1994. There are a couple of special `month' names. The name rest will print the data for the rest of the month, starting tomorrow. The rest argument is not recognised if you give a year as a parameter. If tomorrow happens to be the first day of the next month, then all the data for next month will be printed. The name next prints all the data for next month. OPTIONS
The -c option causes xcalpr to output lines suitable for input to the standard UNIX calendar program. The -d switch is followed by a directory name and specifies an alterative location for your Calendar directory. Your home directory is prepended if the name doesn't start with a slash or a dot. The -f option is followed by a file name and xcalpr will write it's output to that file, rather than standard output. The -u option is followed by a user name and dumps their calendar files rather than yours. The -x option makes xcalev operate with Calendar files that are compatible with the xcalendar program. FILES
$HOME/Calendar/* xc<dd><Mon><Year> A data file is day, Month in three letter format and the year. xy<Year> A year directory. xw<Day> A data file for the weekly code, one per day. SEE ALSO
xcal(1), xcalev(1), xcal_cal(1) AUTHOR
Copyright 1993 by Peter Collinson, Hillside Systems All rights reserved. This product includes software developed by the University of California, Berkeley and its contributors. X Version 11 R5 October 1993 XCALPR(1)
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