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Top Forums Shell Programming and Scripting unix script to check whether particular file exists and to find its size Post 302164191 by namishtiwari on Monday 4th of February 2008 06:07:04 AM
Old 02-04-2008
Quote:
Originally Posted by Balachandar
please tell me in my case how i can modify the code
if [[ -e $filename ]];then
echo "file exists"
fi

or to check if its a file not a dir then

if [[ -f $filename ]];then
echo "its a simple file"
fi

if you are taking as command line arguements replace $filename with $1,if it is the firsta rguement.

filesize=`ls -l sample_file |awk '{print $5 }'`
echo $filesize
 

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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)
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