FUNCTION::ERRNO\_STR(3stap) Errno Tapset FUNCTION::ERRNO\_STR(3stap)

# [NAME](#NAME)

function::errno\_str - Symbolic string associated with error code

# [SYNOPSIS](#SYNOPSIS)

```


    errno_str:string(err:long)
```

# [ARGUMENTS](#ARGUMENTS)

*err*

The error number received

# [DESCRIPTION](#DESCRIPTION)

This function returns the symbolic string associated with the giver error code, such as ENOENT for the number 2, or E#3333 for an out-of-range value such as 3333.

# [SEE ALSO0](#SEE_ALSO0)

[*tapset::errno*(3stap)](/man/enterprise-packages/systemtap/tapset::errno.3stap)

September 2026 SystemTap Tapset Reference Ver

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Document: function::errno_str(3stap) from systemtap 5.6-r1 (Chainguard OS)
Source: https://sourceware.org/git/systemtap.git