Struct Process

pub struct Process(/* private fields */);

System process.

Some extra methods can be found in the OS extensions

Implementations

impl Process

pub fn pid(&self) -> Pid

Returns the process pid.

pub fn parent_pid(&self) -> impl Future<Output = ProcessResult<Pid>>

Returns future which resolves into the process parent pid.

pub fn parent(&self) -> impl Future<Output = ProcessResult<Process>>

Returns future which resolves into the parent Process.

pub fn name(&self) -> impl Future<Output = ProcessResult<String>>

Returns future which resolves into the process name.

pub fn exe(&self) -> impl Future<Output = ProcessResult<PathBuf>>

Returns future which resolves into the process executable as an absolute path.

pub fn command(&self) -> impl Future<Output = ProcessResult<Command>>

Returns future which resolves into the process command line.

Example

let process = process::current().await?;
let command = process.command().await?;
println!("Command line arguments:");
for arg in &command {
    println!("{:?}", arg);
}

pub fn cwd(&self) -> impl Future<Output = ProcessResult<PathBuf>>

Returns future which resolves into the process current working directory.

Compatibility

For Windows this method is not implemented yet and will always return an error, see #105.

pub fn status(&self) -> impl Future<Output = ProcessResult<Status>>

Returns future which resolves into the current process status.

pub fn create_time(&self) -> impl Future<Output = ProcessResult<Time>>

Returns future which resolves into the process creation time, expressed as a Time amount since the UNIX epoch.

pub fn cpu_time(&self) -> impl Future<Output = ProcessResult<CpuTime>>

Returns future which resolves into the accumulated process time.

pub fn cpu_usage(&self) -> impl Future<Output = ProcessResult<CpuUsage>>

Returns future which resolves into the CPU usage measurement.

Returned CpuUsage struct represents instantaneous CPU usage and does not represent any reasonable value by itself. It is suggested to wait for a while with help of any async timer (for accuracy recommended delay should be at least 100 ms), call this method once again and subtract former CpuUsage from the new one.

Same to any *nix system, calculated CPU usage might exceed 100 % if the process is running multiple threads on different CPU cores.

Example

let process = process::current().await?;
let measurement_1 = process.cpu_usage().await?;
// Or any other async timer at your choice
futures_timer::Delay::new(Duration::from_millis(100)).await;
let measurement_2 = process.cpu_usage().await?;

println!("CPU usage: {} %", (measurement_2 - measurement_1).get::<ratio::percent>());

pub fn memory(&self) -> impl Future<Output = ProcessResult<Memory>>

Returns future which resolves into the memory information about this process.

pub fn is_running(&self) -> impl Future<Output = ProcessResult<bool>>

Returns future which checks if this Process is still running.

pub fn suspend(&self) -> impl Future<Output = ProcessResult<()>>

Suspend the current process.

Before the signal send, it checks whether process PID has been reused, and if it is a case, NoSuchProcess error will be returned.

Compatibility

For *nix systems it sends the SIGSTOP signal to process.

pub fn resume(&self) -> impl Future<Output = ProcessResult<()>>

Resume the current process.

Before the signal send, it checks whether process PID has been reused, and if it is a case, NoSuchProcess error will be returned.

Compatibility

For *nix systems it sends the SIGCONT signal to process.

pub fn terminate(&self) -> impl Future<Output = ProcessResult<()>>

Terminate the current process.

Before the signal send, it checks whether process PID has been reused, and if it is a case, NoSuchProcess error will be returned.

Compatibility

For *nix systems it sends the SIGTERM signal to process.

For Windows it is an alias for the Process::kill

pub fn kill(&self) -> impl Future<Output = ProcessResult<()>>

Kills the current process.

Before the signal send, it checks whether process PID has been reused, and if it is a case, NoSuchProcess error will be returned.

Compatibility

For *nix systems it sends the SIGKILL signal to process.

TerminateProcess function is used for Windows, it initiates the termination but does not awaits for completion.

Trait Implementations

impl Debug for Process

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

Formats the value using the given formatter.

impl Hash for Process

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Process

fn eq(&self, other: &Process) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for Process

impl StructuralPartialEq for Process