load_file() problem

[stacy2939287]

I'm running as mysql root user on my system.

I can select load_file('/etc/passwd'); no problem

But when I try to select load_file('/var/lib/mysql/mysql'); I get NULL as a result why? this file is good, I can cat it as root and view the mysql user data, why cant mysql load_file it? Its permissions are the default:

-rw-rw---- 1 mysql mysql 444 2009-08-04 19:08 user.MYD

It's owner is by default the user mysql and has read permission, so why doesn't mysql like to load_file it? Is mysql somehow blocking access to this file and if so how can I bypass that? Doing stuff like mysql/../mysql in the path doesn't work, and using hex encoding didn't work either?

[Atli]

Hey.

You say you are trying to load a file called "/var/lib/mysql/mysql" but your ls output lists a file named "user.MYD". Could you simply have typed in the wrong path?

If not, consider this, from the manual:

The file must be readable by all and its size less than max_allowed_packet bytes.

It says "readable by all". Perhaps you need to CHMOD the file to 664? (Or otherwise readable by everybody.)

The max_allowed_packet directive could of course also be messing with your code. Worth checking.

[mlavannis]

You need to grant the MySQL FILE privilege to the user. Note that this is a GLOBAL permission. It allows the user to access all files that MySQL has permissions to.

You can set it with the command:

GRANT FILE ON *.* TO person@'<host>';