CacheClearCommand: open_basedir restriction warning

[kopfsalat]

Symfony version(s) affected

6.4.5

Description

Hi,
we're runnning our Symfony project in a php environment with open_basedir restrictions. Since upgrading to 6.4.5 the behavior of the cache:clear command changed. We now get a "Warning: is_readable(): open_basedir restriction in effect. File(/proc/mounts) is not within the allowed path(s): ..." warning. It gets triggered by the isNfs(string $dir) method in Symfony\Bundle\FrameworkBundle\Command\CacheClearCommand.

I was able to narrow it down to this commit:
[FrameworkBundle] Prevent silenced warning by checking if /proc/mount… (349b3e7)

How to reproduce

To reproduce run symfony in an php environment with config
open_basedir = /var/www/
or likely and run the cache:clear command.

Possible Solution

Since is_readable() produces meaningful output even when restricted by open_basedir config, changing the if statement from

if ('/' === \DIRECTORY_SEPARATOR && is_readable('/proc/mounts') && $files = @file('/proc/mounts'))
to
if ('/' === \DIRECTORY_SEPARATOR && @is_readable('/proc/mounts') && $files = @file('/proc/mounts'))

would suppress the error without having any negative side effects.

Additional Context

No response

[derrabus]

I was able to narrow it down to this commit: 349b3e7

For reference, that's #53785 by @shyim.

Please send a PR.