# fs.real_path

## Function

Returns the true absolute path as resolved by the operating system, which can be used to eliminate `.`, `..` and resolve symbolic links or Windows junctions.

## Syntax

```bt
fs(path).real_path()
```

## Parameters

No parameters.

## Return value

| Type | Description |
| ------ | ------ |
| String | The real absolute path after parsing. Windows returns the plain drive letter or UNC path text without the `\\?\` prefix. |

## Example

```bt
project = fs('@/src/..').real_path()

// Output: the actual absolute path of the project root
print project
```

## Notes

- The target path must exist; a Chinese error will be thrown when the path does not exist, has no permission to access, or cannot be parsed by the operating system.
- Symbolic links and Windows junctions resolve to the actual target, so security boundary judgments should compare to the real path rather than the raw text.
- The delimiter of the return value follows the current operating system.