process: improve error message when cwd no longer exists

[scott-memco]

Summary

When the current working directory is deleted or unmounted while a Node.js process is running, process.cwd() throws:

Error: ENOENT: no such file or directory, uv_cwd
    at process.wrappedCwd [as cwd] (node:internal/bootstrap/switches/does_own_process_state:142:28)

The error references uv_cwd (a libuv internal) but never mentions process.cwd() or explains that the directory was deleted. This is confusing to debug, especially when triggered deep in dependency code.

Changes

lib/internal/bootstrap/switches/does_own_process_state.js

Wraps the rawMethods.cwd() call in wrappedCwd() to catch ENOENT and throw a descriptive error:

• Sets message to: "The current working directory does not exist. It may have been deleted or unmounted. Change to an existing directory and try again."
• Sets syscall to process.cwd instead of uv_cwd
• Preserves err.code (ENOENT) so existing programmatic checks still work
• Re-throws non-ENOENT errors unchanged

Before:

Error: ENOENT: no such file or directory, uv_cwd

After:

Error: The current working directory does not exist. It may have been deleted or unmounted. Change to an existing directory and try again.

test/parallel/test-process-cwd-enoent.js (new)

Regression test that:

1. Creates a temp directory
2. Spawns a child process that chdirs into it, deletes it, and calls process.cwd()
3. Asserts the error has code: 'ENOENT', syscall: 'process.cwd', and a message mentioning "current working directory"
4. Skipped on Windows (Windows does not allow deleting cwd of a running process)

Fixes: #57045

Made with Cursor

[nodejs-github-bot]

Review requested:

• @nodejs/startup

[addaleax]

This seems like it duplicates 3518af0

[codecov]

Codecov Report

❌ Patch coverage is 88.23529% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.72%. Comparing base (a879b39) to head (cdeae2e).
⚠️ Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
...ernal/bootstrap/switches/does_own_process_state.js	88.23%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #61736   +/-   ##
=======================================
  Coverage   89.72%   89.72%           
=======================================
  Files         675      675           
  Lines      204525   204540   +15     
  Branches    39303    39305    +2     
=======================================
+ Hits       183508   183525   +17     
+ Misses      13296    13287    -9     
- Partials     7721     7728    +7     

Files with missing lines	Coverage Δ
...ernal/bootstrap/switches/does_own_process_state.js	94.33% <88.23%> (-0.80%)	⬇️

... and 27 files with indirect coverage changes

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