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Top Forums Shell Programming and Scripting Error while checking file existance Post 302734039 by ravigupta2u on Wednesday 21st of November 2012 11:51:00 AM
Old 11-21-2012
Error while checking file existance

Kindly help on below script:
Code:
<<

i='find ...'

if [ -f $i ] then
 echo 'File Exists'
else
  echo 'File Does Not Exist'

>>

If i has some file name then it runs properly but if i has nothing ( blank value) then it throws an error. I dont exactly remember right now but error seems like: "test:..parameter..."

To me it looks like if variablei does not have any file name if statements gets fail.

Could you please suggest me the right way to check if i has some file name and existence of file.

Thanks in advance

Moderator's Comments:
Mod Comment Please use code tags next time for your code and data.

Last edited by vbe; 11-21-2012 at 01:22 PM..
 

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OUTPUT_ADD_REWRITE_VAR(3)						 1						 OUTPUT_ADD_REWRITE_VAR(3)

output_add_rewrite_var - Add URL rewriter values

SYNOPSIS
bool output_add_rewrite_var (string $name, string $value) DESCRIPTION
This function adds another name/value pair to the URL rewrite mechanism. The name and value will be added to URLs (as GET parameter) and forms (as hidden input fields) the same way as the session ID when transparent URL rewriting is enabled with session.use_trans_sid. Please note that absolute URLs (http://example.com/..) aren't rewritten. This function's behavior is controlled by the url_rewriter.tags php.ini parameter. Note Calling this function will implicitly start output buffering if it is not active already. PARAMETERS
o $name - The variable name. o $value - The variable value. RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 output_add_rewrite_var(3) example <?php output_add_rewrite_var('var', 'value'); // some links echo '<a href="file.php">link</a> <a href="http://example.com">link2</a>'; // a form echo '<form action="script.php" method="post"> <input type="text" name="var2" /> </form>'; print_r(ob_list_handlers()); ?> The above example will output: <a href="file.php?var=value">link</a> <a href="http://example.com">link2</a> <form action="script.php" method="post"> <input type="hidden" name="var" value="value" /> <input type="text" name="var2" /> </form> Array ( [0] => URL-Rewriter ) SEE ALSO
output_reset_rewrite_vars(3), ob_flush(3), ob_list_handlers(3). PHP Documentation Group OUTPUT_ADD_REWRITE_VAR(3)
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