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Full Discussion: Help in writing a KSH script to filter the latest record?
Top Forums Shell Programming and Scripting Help in writing a KSH script to filter the latest record? Post 302392677 by Scrutinizer on Friday 5th of February 2010 05:41:46 AM
Old 02-05-2010
If the dates are not sorted and if you have GNU date than you could this I suppose:
Code:
#!/bin/ksh
typeset -A A
typeset -A D
while IFS="|" read city field2 tdate field4 key ; do
  newdate=$(date -d "$tdate" '+%s')
  if [ $newdate -gt "${D[$key]}" ]; then
    A[$key]="$city|$field2|$tdate|$field4|$key"
    D[$key]=$newdate
  fi
done < infile126
for i in "${A[@]}"; do
  echo "$i"
done|sort -t'|' -k5,5

 

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LEARN ABOUT OPENSOLARIS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a    Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.11							    30 Jan 2004 							 script(1)
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