---
name: "function::user_string_n"
section: "3stap"
platform: "linux"
package: "systemtap-doc"
version: "5.1-5"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/function::user_string_n"
---

# function::user\_string\_n(3stap)

Retrieves string of given length from user space

## NAME

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

## SYNOPSIS

```
1) user_string_n:string(addr:long,n:long)
```

```
2) user_string_n:string(addr:long,n:long,err_msg:string)
```

## ARGUMENTS

*addr*

the user space address to retrieve the string from

*n*

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

*err\_msg*

the error message to return when data isn't available

## DESCRIPTION

1\) Returns the C string of a maximum given length from a given user space address. Reports an error on the rare cases when userspace data is not accessible at the given address.

2\) Returns the C string of a maximum given length from a given user space address. Returns the given error message string on the rare cases when userspace data is not accessible at the given address.

## SEE ALSO0

[*tapset::uconversions*(3stap)](/tapset::uconversions/3stap.md)

## SEE ALSO0

[*tapset::uconversions*(3stap)](/tapset::uconversions/3stap.md)