---
name: "ustrerror"
section: "3alleg"
platform: "linux"
package: "liballegro-doc"
version: "2:4.2.2-2.2"
release: "Debian 6.0 (Squeeze)"
platforms: ["linux"]
url: "https://new.carta.tech/ustrerror"
---

# ustrerror(3alleg)

Returns a string describing errno. Allegro game programming library.

## NAME

ustrerror - Returns a string describing errno. Allegro game programming library.

## SYNOPSIS

**#include \<allegro.h\>**

**const char \*ustrerror(int err);**

## DESCRIPTION

This function returns a string that describes the error code \`err', which normally comes from the variable \`errno'. Example:

```
   PACKFILE *input_file = pack_fopen("badname", "r");
   if (input_file == NULL)
      allegro_message("%s\nSorry!\n", ustrerror(errno));
```

## RETURN VALUE

Returns a pointer to a static string that should not be modified or freed. If you make subsequent calls to ustrerror(), the string will be overwritten.

## SEE ALSO

[**uconvert**(3alleg)](/uconvert/3alleg.md), [**allegro\_error**(3alleg)](/allegro_error/3alleg.md)