---
id: "errno_name"
kind: "datatype"
status: "draft"
is_pii: false
categories: ["software"]
langs: ["common"]
quality: 80
url: "https://registry.apicrafter.io/datatype/errno_name"
---

# POSIX errno name (`errno_name`)

> **Draft.** Draft records have not been reviewed yet and may be incomplete or wrong; do not treat them as authoritative for legal or compliance decisions.

Symbolic name of a system error number from the C header errno.h, such as ENOENT. System calls and library functions on Unix-like systems set errno to one of these values. Programs and logs record the name because the number behind a name differs between systems. All names start with the letter E.

- Personal data (PII): no
- Categories: Software development (software)
- Countries: global
- Languages: Common to most languages (common)
- Classification: categorical

## Detection

Regular expression (Python `re`):

```
^E[A-Z0-9]{2,}$
```

## Examples

- `ENOENT` — No such file or directory
- `EACCES` — Permission denied
- `ETIMEDOUT` — Connection timed out
- `E2BIG` — Argument list too long
- `enoent` (invalid example) — Lowercase

## Translations

- ru: Имя кода ошибки errno (POSIX)

## Sources

- doc: <https://man7.org/linux/man-pages/man3/errno.3.html>

## Quality

Score 80/100. Missing: mapping (Wikidata, Schema.org, ...), detector coverage.

JSON: <https://registry.apicrafter.io/api/v1/datatypes/errno_name.json> · Edit: <https://github.com/apicrafter/metacrafter-registry/edit/main/data/datatypes/any/software/errno_name.yaml>