Symfony version(s) affected

6.2.7

Description

Error message:

• Error: Call to undefined function Symfony\Component\Console\shell_exec() in /{path_to_project}/vendor/symfony/console/Application.php:989
• https://github.com/symfony/console/blob/cbad09eb8925b6ad4fb721c7a179344dc4a19d45/Application.php#L989

Terminal:hasSttyAvailable() checks for availability of exec

• https://github.com/symfony/console/blob/cbad09eb8925b6ad4fb721c7a179344dc4a19d45/Terminal.php#L120-L134

However, all calls inside the condition are then run using shell_exec and that fails when it is disabled.

• https://github.com/symfony/console/blob/cbad09eb8925b6ad4fb721c7a179344dc4a19d45/Application.php#L988-L996

One might argue that it does not make much sense to have one function enabled and the other disabled, but apparently it can happen and then it fails.

Or am I missing something? :)

How to reproduce

Have a system, that has:

• exec enabled
• shell_exec disabled
• symfony/console installed
• symfony/events installed (otherwise checks for dispatcher fail and a different route in the code is taken that will not manifest the problem)

Then try to run the symfony console from command line.

Possible Solution

Either check availability of shell_exec in Terminal::hasSttyAvailable() or change all calls to use exec.

Additional Context

The check has been introduced here:

• [Console] Do not check for "stty" using "exec" if that function is disabled #37466