| Written in | C |
|---|---|
| Operating system | NetBSD |
| Type | File system driver |
| License | BSD license |
Pass-to-Userspace Framework File System (puffs) is a NetBSD kernel subsystem developed for running filesystems in userspace. It was added to NetBSD in the 5.0 release, and was ported to DragonFly BSD in the 3.2 release.