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Node.js fs/promises Error Codes: ENOENT, EEXIST, ENOTEMPTY, EISDIR, Recursive mkdir and Atomic Writes

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Self-Hosting & Infra beginner 5 min read $0.01 Updated 2026-10-20

Executed on Node 22: error code and syscall for missing files, existing and nested directories, non-empty rmdir, reading a directory, writing into a missing directory, wx exclusive create and rename into a missing folder, plus recursive mkdir, rm force and invalid UTF-8 reads.

Decode the errno code on every file error, create nested directories safely, remove paths that may not exist, write exclusively, avoid exists-then-use races and replace files atomically with rename.

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