Concurrent Execution of Single Executable on Linux Fails #4644
Description
Execution of a single executable (e.g., /p:PublishSingleFile=true) by multiple users on Linux results in an extraction failure.
General
I first came across this while testing my build against CentOS 7, but I suspect this isn't limited to just CentOS 7. Upon first execution, it appears the application files are extracted to /var/tmp/.net//
The permissions of the /var/tmp/.net directory are 0700 and owned by the first user that ran it. As a result, if an additional user runs the same executable the extraction fails due to the permissions of /var/tmp/.net:
[test@localhost ~]$ /opt/myapp/myapp
Failure processing application bundle.
Failed to create directory [/var/tmp/.net/myapp/] for extracting bundled files
A fatal error was encountered. Could not extract contents of the bundle
The executable was built using .NET Core SDK 3.1.201.
This is easily reproducible by building the following as a single executable, and then trying to run it from multiple user accounts:
using System;
using System.Threading.Tasks;
namespace testApp
{
class Program
{
async static Task Main(string[] args)
{
await Task.Delay(1000000);
}
}
}
Upon reading the "Single-File" design in 3.0 vs. 5.0, I do see that the goal is to no longer use the extraction based approach, so I suspect we wouldn't see that with 5.0p2. That said, I doubt this is a desired behavior in 3.1 (LTS).