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Top Forums Shell Programming and Scripting to pick the latest file modified in a directory Post 302537076 by michaelrozar17 on Thursday 7th of July 2011 04:10:04 AM
Old 07-07-2011
Quote:
Originally Posted by vishwakar
I wan to pick the latest modified file name and redirect it to a file ..

Code:
ls -tr | tail -1 >file

but this is printing file ins side the filename ,

can anyone help me out
Because by the time the command ls -tr is run the re-directed filename becomes the latest one and hence the same file-name gets stored in the same file. Try
Code:
echo $(ls -tr | tail -1) > newfile.txt

But if you run once again you get the file newfile.txt appended to itself. Check by replacing > with >>. If you need a permanent solution then redirect the output file to a file present in different location.

Or could execute in a sub-shell
Code:
(ls -tr|tail -1 > newfile.txt)

# Which when run once again has newfile.txt stored in itself.

Last edited by michaelrozar17; 07-07-2011 at 05:17 AM..
 

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COPY(3) 								 1								   COPY(3)

copy - Copies file

SYNOPSIS
bool copy (string $source, string $dest, [resource $context]) DESCRIPTION
Makes a copy of the file $source to $dest. If you wish to move a file, use the rename(3) function. PARAMETERS
o $source - Path to the source file. o $dest - The destination path. If $dest is a URL, the copy operation may fail if the wrapper does not support overwriting of existing files. Warning If the destination file already exists, it will be overwritten. o $context - A valid context resource created with stream_context_create(3). RETURN VALUES
Returns TRUE on success or FALSE on failure. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.3.4 | | | | | | | Changed the $context parameter to actually have | | | an effect. Previously, any $context was ignored. | | | | | 5.3.0 | | | | | | | Added context support. | | | | | 4.3.0 | | | | | | | Both $source and $dest may now be URLs if the | | | "fopen wrappers" have been enabled. See fopen(3) | | | for more details. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 copy(3) example <?php $file = 'example.txt'; $newfile = 'example.txt.bak'; if (!copy($file, $newfile)) { echo "failed to copy $file... "; } ?> SEE ALSO
move_uploaded_file(3), rename(3), The section of the manual about handling file uploads. PHP Documentation Group COPY(3)
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