Multiple fixes to make nsjail work correctly:
1. Use absolute paths for python3 and bun binaries (/usr/bin/python3,
/usr/bin/bun) since nsjail's execve doesn't use PATH
2. Update cwd to use temp directory when code is written there, so
nsjail can find the script files (was using /debugger as cwd before)
3. Bind-mount /tmp from host instead of using tmpfs, so the temp
directories with scripts are accessible inside the sandbox
4. Add /debugger directory mount so Python debugger server script
is accessible inside nsjail
5. Add PATH environment variable to nsjail config
All debugger tests now pass with ENABLE_NSJAIL=true.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
The nsjail debugger mode was failing with "chdir('/tmp'): No such file
or directory" because without a config file, nsjail uses minimal mounts
that don't include /tmp or other necessary directories.
Added nsjail.debug.config.proto with proper mounts:
- /bin, /lib, /lib64, /usr, /etc (system directories)
- /tmp as tmpfs (for script execution)
- /dev/null, /dev/random, /dev/urandom (device nodes)
- /root as tmpfs (for bun cache)
Also updated:
- entrypoint-extra.sh: Pass --nsjail-config when ENABLE_NSJAIL=true
- DockerfileExtra: Copy nsjail config, update ports to 3003
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Ruben Fiszel