File creation time in seconds


 
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# 1  
Old 04-24-2010
Java File creation time in seconds

Hi All,

Cany any one help me in solving this..
Problem statement: I have a requirement to find the time from which there are no files created in a given directory. For this I am assuming that I need to get the file creation time in seconds, then the current time in seconds using `date +%s`. Then calculating the time by subtracting file creation time from date.

Please, help me in getting the file creation time in seconds..


Thanks in advance..
# 2  
Old 04-24-2010
Hi.

If a file is created in a directory, then the timestamp of the directory is updated.

You can get the timestamp of that (seconds since epoch) using the perl stat function, something like:

Code:
perl -e '$epoch = (stat("."))[9]; print "$epoch";'

(. is the current directory)

Subtracting that from date '+%s' would give the difference in seconds.
# 3  
Old 04-24-2010
Java

Hi,

I am new to Perl scripting can you suggest me if there is an option using unix shell scripting ..
or can you please help me with an example script
# 4  
Old 04-24-2010
scottn's code is fine for what you want

You may want to revisit your assumption: for performance reasons, file metadata is not always updated every time an open file is written to. Depending upon a lot of factors the directory could be stale and your test would think no file writes had occurred, when in fact they have.

See the attached white paper.
# 5  
Old 04-24-2010
Java

Thank You for helping me..
# 6  
Old 04-24-2010
Quote:
Originally Posted by chary
Hi,

I am new to Perl scripting can you suggest me if there is an option using unix shell scripting ..
or can you please help me with an example script
It always smells of homework when someone, when given a "solution" that is perfectly simple asks to have it by a specific means.

I'm not familiar with the controls of an Airbus A340, but I still use one to fly to where I want to get to!

Last edited by Scott; 04-24-2010 at 09:59 PM..
# 7  
Old 04-24-2010
Code:
filesec()
{
   perl -e '$epoch = (stat("$ARGV[0]"))[9]; print "$epoch";'  "$1"

}

find /somepath -type d | 
while read fname 
do
     now=$(date "+%s" )
     filetime=$( filesec "$fname")
     echo "Directory $fname last updated $(( $now - $filetime ))"
done

-- this code won't work on Solaris, Solaris date does not like %s

scottn - It may be homework, but I kinda doubt it. We get this question a lot.
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