log actual mkdir() failure reason

[oadam]

Configuration:

PhpFastCache version: 6.0.7
PHP version: 7.0.22-0ubuntu0.16.04.1
Operating system: ubuntu

Issue description:

I'm using the files driver in production. Most of the time everything is working fine, but sometimes mkdir fails for an unknown reason (I'm almost sure it's not a permission issue), and phpFastCache logs an unhelpful PLEASE CHMOD /mytmpdir - 511 OR ANY WRITABLE PERMISSION!

Would it be possible to update the file driver so that it returns the actual root cause ? A code similar to this (from https://stackoverflow.com/a/929490/436792) could be used :

if (!@mkdir($dir)) {
    $error = error_get_last();
    // use $error['message'];
}

[Geolim4]

The error is actually quite helpful. It's telling you that PFC can't write on the disk. There's multiple potentials causes:

• No left space on disk
• Not owner of the target directory
• Incorrect chmod

I'm not sure that error_get_last() will return more pertinent information.

Cheers,
Georges

[oadam]

The stack overflow answer has quite a few upvotes... Don't you think `error_get_last()` can contain the exact cause ? Le 10 déc. 2017 12:03, "Georges.L" <notifications@github.com> a écrit : The error is actually quite helpful. It's telling you that PFC can't write on the disk. There's multiple potentials causes: - No left space on disk - Not owner of the target directory - Incorrect chmod I'm not sure that error_get_last() will return more pertinent information. Cheers, Georges — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#554 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABkILaduZY1UKnSn2mXSzfRgnnSFrqqEks5s-7p4gaJpZM4Q8VHK> .

[Geolim4]

If there's an I/O issue, just check the php logs. That's simple, right ?

[oadam]

I agree that the current error message covers 95% of the cases but adding the last error could help the remaining 5% (me included :-) ). Le 10 déc. 2017 12:10, "Olivier Adam" <olivier.adam@m4x.org> a écrit :

…

The stack overflow answer has quite a few upvotes... Don't you think `error_get_last()` can contain the exact cause ? Le 10 déc. 2017 12:03, "Georges.L" ***@***.***> a écrit : The error is actually quite helpful. It's telling you that PFC can't write on the disk. There's multiple potentials causes: - No left space on disk - Not owner of the target directory - Incorrect chmod I'm not sure that error_get_last() will return more pertinent information. Cheers, Georges — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#554 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABkILaduZY1UKnSn2mXSzfRgnnSFrqqEks5s-7p4gaJpZM4Q8VHK> .

[oadam]

I think the io error is suppressed by the use of `@` and won't be present in the logs. Le 10 déc. 2017 12:20, "Georges.L" <notifications@github.com> a écrit :

…

If there's an I/O issue, just check the php logs. That's simple, right ? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#554 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABkILUCNTUaXqsInYTxjwYkN3FJlzvA1ks5s-76ZgaJpZM4Q8VHK> .

[Geolim4]

The "@" should not be used at all in php, it's a very bad practice. Hiding the error does not solve them :)

[oadam]

The current code uses `@mkir` : https://github.com/PHPSocialNetwork/phpfastcache/blob/67960f2864dbf8c7abc00140bc36a392781ef680/src/phpFastCache/Core/Pool/IO/IOHelperTrait.php As you said this is not ideal but adding a get_last_error, as suggested by my stackoverflow link, would make it acceptable. Le 10 déc. 2017 13:50, "Georges.L" <notifications@github.com> a écrit :

…

The "@" should not be used at all in php, it's a very bad practice. Hiding the error does not solve them :) — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#554 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABkILfeKlpbzUXGpdJaltW3tx7QDlRXcks5s-9N2gaJpZM4Q8VHK> .

[Geolim4]

I can indeed work on phpFastCacheIOException because this exception is thrown every time that we got a critical IO Exception.