Finding out the last modified time for files

Shell Programming and Scripting
1

I need to find out the last modified time for the files which are older than 6 months. If I use ls -l, the files which are older than 6 months, I am just getting the day, month and year instead of exact time. I am using Korn shell, and SUN OS.

Thanks in Advance,
Kiran

2

If you have stat on your machine, you can use that.

From man stat

       The valid format sequences for files (without --filesystem):

 %X - Time of last access as seconds since Epoch %x -  Time
              of  last  access %Y - Time of last modification as seconds since
              Epoch %y - Time of last modification %Z - Time of last change as
              seconds since Epoch %z - Time of last change

There is another way out as well. Use the approach given in this post - script to view files based on date

vino

3

Kumariak,
I would suggest using a version of the "find" command. I suggest a man page is a good place to start, i.e. man find<cr>.

regards

4

Otherwise you'll have to use perl or something similar to get a full filetime - this gets the mtime of the file:

#!/usr/bin/perl
#^ PROGRAM DESCRIPTION
#^ -------------------
#^ This program prints the modification times of files.
#^ It uses the following format:  inodetime.pl filename
#^ It will accept:  inodetime.pl filename1 filename2 filename3
#^                  inodetime.pl /tmp/file*
#^ The format of the output is: YYYYMMDDhhmmss filename
#^ example:
#^           $ filetime.pl /tmp/t*
#^           19961115105425 /tmp/test.sql
#^           19970116113616 /tmp/tststat.pl
#^

############################################
# Get the (next) input from the command line
############################################
while ($curfile = $ARGV[0])
{
   #################################################
   # Do following code block only if $curfile exists
   #################################################
   if (-e $curfile)
   {

      # stat structure into variables

      ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
      $atime,$mtime,$ctime,$blksize,$blocks)
      = stat("$curfile");

      # time structure into variables

      local($sec,$min,$hr,$day,$mon,$yr,$wday,@dntcare) = localtime($mtime);
      $yr = ($yr>=70) ? $yr+1900 : $yr+2000;
      $yr="$yr";
      $mon = (++$mon < 10) ? "0$mon" : "$mon";
      $day = ($day < 10) ? "0$day" : "$day";
      $hr  = ($hr < 10) ? "0$hr" : "$hr";
      $min = ($min < 10) ? "0$min" : "$min";
      $sec = ($sec < 10) ? "0$sec" : "$sec";

      # Rearrange in the YYYYMMDDhhmmss format and assign to $dte variable

      $dte = join('',$yr,$mon,$day,$hr,$min,$sec);

      # Print modification date and filename

      print ("$dte\n");
      }

   # Shift to next position in command line

   shift (@ARGV);
}