FUNCTION::USER\_STRIN(3stap) String and data retrieving fun FUNCTION::USER\_STRIN(3stap)

# [NAME](#NAME)

function::user\_string\_n\_nofault - Retrieves string of given length from user space

# [SYNOPSIS](#SYNOPSIS)

```


    user_string_n_nofault(addr:long,n:long)
```

# [ARGUMENTS](#ARGUMENTS)

*addr*

the user space address to retrieve the string from

*n*

the maximum length of the string (if not null terminated)

# [DESCRIPTION](#DESCRIPTION)

Returns the C string of a maximum given length from a given user space address. Returns the empty string when userspace data is not accessible at the given address.

# [SEE ALSO0](#SEE_ALSO0)

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

September 2026 SystemTap Tapset Reference Ver

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