---
title: vfs_isrdwr
framework: Kernel
role: symbol
role_heading: Function
platforms: [macOS 10.4+]
path: kernel/1523454-vfs_isrdwr
---

# vfs_isrdwr

Determine if a filesystem is mounted with writes enabled.

## Declaration

```occ
int vfs_isrdwr(mount_t mp);
```

## Parameters

- `mp`: Mount to test.

## Return Value

Return Value Nonzero if filesystem is mounted read-write, else 0.