---
name: "function::user_string2_n_warn"
section: "3stap"
platform: "linux"
package: "systemtap-doc"
version: "2.6-0.2"
release: "Debian 8 (Jessie)"
platforms: ["linux"]
url: "https://new.carta.tech/function::user_string2_n_warn"
---

# function::user\_string2\_n\_warn(3stap)

Retrieves string from user space with alternative warning string

## NAME

function::user\_string2\_n\_warn - Retrieves string from user space with alternative warning string

## SYNOPSIS

```
    user_string2_n_warn:string(addr:long,n:long,warn_msg:string)
```

## ARGUMENTS

*addr*

the user space address to retrieve the string from

*n*

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

*warn\_msg*

the warning message to return when data isn't available

## DESCRIPTION

Returns up to n characters of a C string from a given user space memory address. Reports the given warning message on the rare cases when userspace data is not accessible and warns (but does not abort) about the failure.