Struct ProcDir 

pub struct ProcDir { /* private fields */ }

An open /proc/<pid> directory handle that pins the process.

Opening the directory and reading the status/cmdline files through the same dirfd (openat/fstatat) removes the pid-reuse TOCTOU between independent path lookups: once the directory is open, the kernel keeps it bound to that specific process, so a pid recycled between a probe and a read cannot misattribute identity (finding 13).

Implementations

impl ProcDir

pub fn open(pid: i32) -> Result<Self, CoreError>

Open the /proc/<pid> directory.

Errors

• EACCES: Permission denied.
• ENOENT: The process does not exist (or is gone).

pub fn open_at(proc_root: impl AsRef<Path>, pid: i32) -> Result<Self, CoreError>

Open the /proc/<pid> directory under an explicit procfs root.

pub fn uid(&self) -> Result<u32, CoreError>

Owning UID of the pinned process.

pub fn stat(&self) -> Result<Stat, CoreError>

Identity metadata of the pinned process.

pub fn status(&self) -> Result<ProcStatus, CoreError>

Read /proc/<pid>/status through the pinned handle.

pub fn cmdline(&self) -> Result<String, CoreError>

Read /proc/<pid>/cmdline through the pinned handle.