File system control functions allow you to control various aspects of the file system:
Table 6-3 File System Control Functions| Function Name | Purpose |
| ustat(2)Get file system statistics | Get file system statistics |
| sync(2) | Update super block |
| mount(2) | Mount a file system |
| statvfs(2), fstatvfs(2) | Get file system information |
| sysfs(2) | Get file system type information |