CHMOD directory

zzz

I need to create a file and store it into a directory. Currently directory CHMOD 755 and I need it to be 777 to write new file in. Upon completed operation I need to chmod directory back to 755.

I've tried doing:

chmod($myDir, 0777);

but it's still 755. Is there a different way to CHMOD directory as opposed to file?

bpat1434

what is the value of $myDir? Is it the [man]realpath/man of the directory, or is it a relative path? Does the WebServer have permissions to edit that folder?

The biggest hurdle I see here is that the WebServer user (www, or Apache, or even "nobody") doesn't have permissions to modify that folder. Perhaps it's owned by someone else, or whatever, but it sounds like maybe the Apache user isn't able to modify the directory because of permissions. I personally don't see this issue as I run PHP as a CGI with suPHP so all my scripts run as my user which means permissions such as 0755 are fine for uploads, and the like.

Why do you need to constantly change permissions? Is it not possible to leave the directory at 0777 all the time?

zzz

It's a relative path:

$myDir = "../../dir/targetDir/";

Directory is created by another script and chmod set to 755.

I'd like to keep it 755 vs. 777 for security reasons... I think...

bpat1434

Hmm.....Try running this:

<?php

$myDir = '../../dir/targetDir/';

if(chmod(realpath($myDir), 0777)) { echo 'Successfully changed dir to 0777 permissions!'; }

echo '<br />Safe Mode is: ' . ini_get('safe_mode');

echo '<br />';

clearstatcache();
echo 'Permissions: ' . substr(sprintf('%o', fileperms('/tmp')), -4);

echo '<br />';

if(chmod(realpath($myDir), 0755)) { echo 'Successfully changed dir to 0755 permissions!'; }

echo '<br />';

clearstatcache();
echo 'Permissions: ' . substr(sprintf('%o', fileperms('/tmp')), -4);
?>

What does that output?

zzz

I ran your code and here's the output I get:

Safe Mode is:
Permissions: 1777

Permissions: 1777

I also ran this:

if( ini_get('safe_mode') ){
	echo 'safe MODE';
}else{
	echo 'regular MODE';
}

and the output was: regular MODE

bpat1434

you neeed to change the path from /tmp to $myDir in the fileperms call....

zzz

My bad, should've noticed that.

$myDir = 'test'; 

if(chmod(realpath($myDir), 0777)) { echo 'Successfully changed dir to 0777 permissions!'; } 

echo '<br />Safe Mode is: ' . ini_get('safe_mode'); 

echo '<br />'; 

clearstatcache(); 
echo 'Permissions: ' . substr(sprintf('%o', fileperms($myDir)), -4); 

echo '<br />'; 

if(chmod(realpath($myDir), 0755)) { echo 'Successfully changed dir to 0755 permissions!'; } 

echo '<br />'; 

clearstatcache(); 
echo 'Permissions: ' . substr(sprintf('%o', fileperms($myDir)), -4);

After the changes the output is:

Safe Mode is:
Permissions: 0755

Permissions: 0755

I tried creating dir in this location: mkdir("./test2", 0700); but to no avail. Buffled.

zzz

I decided to create a dir above web level and keep it chmod 777 and store all my files there. It'll address my security paranoya and appears to be a much easier solution. But after trying I can not seem to be able to display images stored in that directory...

Back to the drawing board.