Struct Mounts 

pub struct Mounts { /* private fields */ }

The mount table, parsed once.

Resolving a path against this is string work, so a whole listing can be described from a single read rather than re-reading /proc/self/mountinfo per row.

Implementations

impl Mounts

pub fn current() -> Self

Read the current mount table. An unreadable one yields an empty table, which reports everything as unknown rather than as wrong.

pub fn cached() -> Arc<Self>

The mount table as of at most [MOUNTS_TTL] ago, shared between callers.

For the callers that ask per row. /proc/self/mountinfo is generated by the kernel on each open, so reading it is the expensive part of an answer — four fifths of it — and a listing of five thousand rows asked the same unchanged question five thousand times, once per row and again on every frame that drew them. Sharing one read across the burst is what makes a per-row question affordable.

pub fn parse(mountinfo: &str) -> Self

pub fn fstype_for(&self, path: &Path) -> Option<&str>

The filesystem covering path.

The deepest mount wins, and among mounts at the same point the last one wins: mountinfo lists them in mount order, so a later entry shadows an earlier one. An NFS share automounted at a path appears after the autofs entry covering the same path, and it is the NFS entry that describes what a read will actually do.

pub fn describe(&self, path: &Path) -> Source

How path is reached.

pub fn is_network(&self, path: &Path) -> bool

Trait Implementations

impl Clone for Mounts

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Mounts

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Mounts

fn default() -> Self

Returns the “default value” for a type.