Log File updated time Post: 302926380

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Top Forums Shell Programming and Scripting Log File updated time Post 302926380 by junior-helper on Sunday 23rd of November 2014 10:30:31 PM

11-23-2014

Registered User

Quote:

rolling or not

If you mean stuff gets appended to the file or not, then you should try below code. It works by reading the file size, sleeping 30 min, reading the file size again and comparing the two values.

Quote:

not modified

It's also quite possible that the content of a file is changed, but the file size remains the same.
Obviously, in this case you cannot rely on the file size and should compare the modification times.
The code below can be easily adapted to do so.
Hint: You use the %Y format sequence in the stat command instead of %s (Check man stat or stat --help for details)

Code:

#!/bin/bash

fileloc="/tmp"
filename="test.txt"
fullpath="$fileloc"/"$filename"
interval=1800 # seconds (30 minutes)

if [ -f "$fullpath" ]; then
 echo "File Exists"
 size=$(stat -c'%s' "$fullpath")

 # infinite loop
  while true; do
   sleep $interval
   newsize=$(stat -c'%s' "$fullpath")
    if [ $size -ne $newsize ]; then

     echo "Sending mail."
      printf "Size of %s changed.
Size 30 minutes ago: %d bytes.
Current size: %d bytes." "$fullpath" "$size" "$newsize" |\
      mailx -s "Size changed!" someone@example.net

     size=$newsize
    fi
  done

else
  echo "File not exist"
fi

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LEARN ABOUT PHP

filesize

FILESIZE(3)								 1							       FILESIZE(3)

filesize - Gets file size

SYNOPSIS

       int filesize (string  $filename)

DESCRIPTION

	Gets the size for the given file.

PARAMETERS

	      o $filename
		- Path to the file.

RETURN VALUES

	Returns the size of the file in bytes, or FALSE (and generates an error of level E_WARNING) in case of an error.

       Note

	       Because PHP's integer type is signed and many platforms use 32bit integers, some filesystem functions may return unexpected results
	      for files which are larger than 2GB.

EXAMPLES

       Example #1

	      filesize(3) example

	      <?php

	      // outputs e.g.  somefile.txt: 1024 bytes

	      $filename = 'somefile.txt';
	      echo $filename . ': ' . filesize($filename) . ' bytes';

	      ?>

ERRORS
/EXCEPTIONS
	Upon failure, an E_WARNING is emitted.

NOTES

       Note

	      The results of this function are cached. See clearstatcache(3) for more details.

       Tip

	      As of PHP 5.0.0, this function can also be used with some URL wrappers. Refer to "Supported Protocols  and  Wrappers"  to  determine
	      which wrappers support stat(3) family of functionality.

SEE ALSO

       file_exists(3).

PHP Documentation Group 													       FILESIZE(3)