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PHP mkdir 0777 fail chmod 0777 works

Posted by: admin July 12, 2020 Leave a comment

Questions:

using PHP 5.2.14, this is what happens

[[email protected] public_html]$ php -r "mkdir('directory', 0777);"
[[email protected] public_html]$ ls -lt
drwxrwxr-x  2 rankranger rankranger 4096 Dec  8 17:28 directory

[[email protected] public_html]$ php -r "chmod('directory', 0777);"
[[email protected] public_html]$ ls -lt
drwxrwxrwx  2 rankranger rankranger 4096 Dec  8 17:28 directory

Did not find any related bugs in the php bug list, any idea?

How to&Answers:
$old = umask(0);
mkdir($dir,0777);
umask($old);

Read this,
http://php.net/manual/en/function.mkdir.php

Additional, Check the top directory that you make new directory.

Example)

pwd
/data/log

$dir="/data/log/query";
$old = umask(0); 
mkdir($dir,0777); 
umask($old); 

/data/log must 0777.

Answer:

This is not a bug. See http://php.net/umask – you probably have an umask of 0002. The permission of what you create is yourmode & ~umask, so it takes the write-bit for everyone away from 0777.

Answer:

Working as documented. mkdir respects umask, chmod doesn’t.