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Top Forums Shell Programming and Scripting How to check the varying file size Post 302424367 by Reboot on Tuesday 25th of May 2010 05:09:19 AM
Old 05-25-2010
Quote:
Originally Posted by av_vinay
How to know a file is of fixed file or not over a span of time Actually my requirement is to check the size of the file in a specific directory for 60 seconds, and if it remains the same then I have to move to some other directory.Else I have to stop the execution. Request you to guide me in knowing the varying size of the file.

I got to know to calculate the file size with the following code:

Code:
 
 filesize=`ls -l output.txt |awk '{print $5 }'`
 echo $filesize

how to check it for 60 seconds?.

Thanks.,


You can use something like following :

Code:
# S=`ls -l b |awk '{print $5 }'`;P=0
# while [ $P -lt 60 ]
    do 
     size=`ls -l b |awk '{print $5 }'` 
      echo $size
     if [[ "$size" -ne "$S" ]];then 
          echo "Size has changed... Hence moving the file..."
          mv first_location  final_location
           break
     else  
           sleep 1
     fi
    P=`expr $P + 1`
    S="$size"
    done

SmilieSmilie

Last edited by Reboot; 05-25-2010 at 06:10 AM.. Reason: typo..
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SLEEP(1)						    BSD General Commands Manual 						  SLEEP(1)

NAME
sleep -- suspend execution for an interval of time SYNOPSIS
sleep seconds DESCRIPTION
The sleep command suspends execution for a minimum of seconds. If the sleep command receives a signal, it takes the standard action. IMPLEMENTATION NOTES
The SIGALRM signal is not handled specially by this implementation. The sleep command will accept and honor a non-integer number of specified seconds (with a '.' character as a decimal point). This is a non- portable extension, and its use will nearly guarantee that a shell script will not execute properly on another system. EXIT STATUS
The sleep utility exits 0 on success, and >0 if an error occurs. EXAMPLES
To schedule the execution of a command for x number seconds later (with csh(1)): (sleep 1800; sh command_file >& errors)& This incantation would wait a half hour before running the script command_file. (See the at(1) utility.) To reiteratively run a command (with the csh(1)): while (1) if (! -r zzz.rawdata) then sleep 300 else foreach i (`ls *.rawdata`) sleep 70 awk -f collapse_data $i >> results end break endif end The scenario for a script such as this might be: a program currently running is taking longer than expected to process a series of files, and it would be nice to have another program start processing the files created by the first program as soon as it is finished (when zzz.rawdata is created). The script checks every five minutes for the file zzz.rawdata, when the file is found, then another portion processing is done courteously by sleeping for 70 seconds in between each awk job. SEE ALSO
nanosleep(2), sleep(3) STANDARDS
The sleep command is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible. HISTORY
A sleep command appeared in Version 4 AT&T UNIX. BSD
April 18, 1994 BSD
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