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Top Forums Shell Programming and Scripting File modification time comparison Post 302408375 by Arunprasad on Monday 29th of March 2010 10:17:38 AM
Old 03-29-2010
Java File modification time comparison

Hi All,

I have two files (given below) each exists under different paths. I want to compare the modification time stamp of file1.txt is lessthan the modification time of file2.txt.

Quote:
-rw-r----- 1 athang staff 166 Feb 15 00:03 file1.txt
-rw-r----- 1 athang staff 306 Feb 15 00:03 file2.txt
Code:
  month1=`ls -l file1.txt | awk '{ print $6}'`
  date1=`ls -file1.txt | awk '{ print $7}'`
  time1=`ls -lfile1.txt | awk '{ print $8}' | cut -f 1 -d ":"`

  month2=`ls -l file2.txt | awk '{ print $6}'`
  date2=`ls -l file2.txt | awk '{ print $7}'`
  time2=`ls -l file2.txt | awk '{ print $8}' | cut -f 1 -d ":"`

i thought of perform the comparision by checking the month1 is lesser than month2, but what i have here is String (in which i dont know anyway to perform lessthan operations). I can use a case statement and assign the 1,2 ... 12, like case $month1; Jan) month1final=1 and case $month2; Jan) month2final=1 .. etc. then now i can do lessthan operation.

Is there any simple solution to compare the modification time of two files. Please provide your thoughts. Let me know if i am not clear.
 

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DIFF(1) 						      General Commands Manual							   DIFF(1)

NAME
diff - print differences between two files SYNOPSIS
diff [-c | -e | -C n] [-br]file1 file2 OPTIONS
-C n Produce output that contains n lines of context -b Ignore white space when comparing -c Produce output that contains three lines of context -e Produce an ed-script to convert file1 into file2 -r Apply diff recursively to files and directories of EXAMPLES
diff file1 file2 # Print differences between 2 files diff -C 0 file1 file2 # Same as above diff -C 3 file1 file2 # Output three lines of context with every diff -c file1 file2 # Same diff /etc /dev # Compares recursively the directories /etc and /dev diff passwd /etc # Compares ./passwd to /etc/passwd DESCRIPTION
the same name, when file1 and file2 are both directories" difference encountered" Diff compares two files and generates a list of lines telling how the two files differ. Lines may not be longer than 128 characters. If the two arguments on the command line are both directories, diff recursively steps through all subdirectories comparing files of the same name. If a file name is found only in one directory, a diagnostic message is written to stdout. A file that is of either block special, character special or FIFO special type, cannot be compared to any other file. On the other hand, if there is one directory and one file given on the command line, diff tries to compare the file with the same name as file in the directory directory. SEE ALSO
cdiff(1), cmp(1), comm(1), patch(1). DIFF(1)
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