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= { path = "../../serde/serde" } +serde_derive = { path = "../../serde/serde_derive" } diff --git a/proc_man_rpc/src/lib.rs b/proc_man_rpc/src/lib.rs new file mode 100644 index 0000000..6356321 --- /dev/null +++ b/proc_man_rpc/src/lib.rs @@ -0,0 +1,129 @@ +#![allow(clippy::result_unit_err)] + +use std::os::mikros::{ + ipc::rpc::{self, IncomingCall}, + Errno, +}; + +pub use proc_man_structs::WaitResult; + +use parking_lot::RwLock; + +static SERVER: RwLock>> = RwLock::new(None); + +const PROTO: u16 = 8; + +pub trait Server: Send + Sync { + fn new_proc(&self, pid: u64, parent: Option) -> Result<(), Errno>; + fn set_stdio(&self, pid: u64, stdio: [Option<(u64, u64)>; 3]) -> Result<(), Errno>; + fn get_stdio(&self, from: u64) -> [Option<(u64, u64)>; 3]; + fn set_cli_args(&self, pid: u64, args: Vec) -> Result<(), Errno>; + fn get_cli_args(&self, from: u64) -> Vec; + fn exit(&self, from: u64, code: u8); + fn wait(&self, from: u64, pid: u64, block: bool) -> Result; +} + +#[derive(Copy, Clone)] +pub struct Client(u64); + +impl Client { + pub fn new(pid: u64) -> Self { + Self(pid) + } + + pub fn new_proc(&self, pid: u64, parent: Option) -> Result<(), Errno> { + postcard::from_bytes( + &rpc::send_call(self.0, PROTO, 7, &postcard::to_stdvec(&(pid, parent)).unwrap()).get_return(), + ) + .unwrap() + } + + pub fn set_stdio(&self, pid: u64, stdio: [Option<(u64, u64)>; 3]) -> Result<(), Errno> { + postcard::from_bytes( + &rpc::send_call(self.0, PROTO, 0, &postcard::to_stdvec(&(pid, stdio)).unwrap()).get_return(), + ) + .unwrap() + } + + pub fn get_stdio(&self) -> [Option<(u64, u64)>; 3] { + postcard::from_bytes( + &rpc::send_call(self.0, PROTO, 1, &[]).get_return(), + ) + .unwrap() + } + + pub fn set_cli_args(&self, pid: u64, args: Vec) -> Result<(), Errno> { + postcard::from_bytes( + &rpc::send_call(self.0, PROTO, 2, &postcard::to_stdvec(&(pid, args)).unwrap()).get_return(), + ) + .unwrap() + } + + pub fn get_cli_args(&self) -> Vec { + postcard::from_bytes( + &rpc::send_call(self.0, PROTO, 3, &[]).get_return(), + ) + .unwrap() + } + + pub fn exit(&self, code: u8) { + postcard::from_bytes( + &rpc::send_call(self.0, PROTO, 4, &postcard::to_stdvec(&code).unwrap()).get_return(), + ) + .unwrap() + } + + pub fn wait(&self, pid: u64, block: bool) -> Result { + postcard::from_bytes( + &rpc::send_call(self.0, PROTO, 5, &postcard::to_stdvec(&(pid, block)).unwrap()).get_return(), + ) + .unwrap() + } +} + +pub fn register_server(server: Box) { + *SERVER.write() = Some(server); + rpc::register_callback(PROTO, callback); +} + +pub fn unregister_server() { + rpc::unregister_callback(PROTO); + *SERVER.write() = None; +} + +fn callback(call: IncomingCall) { + let server_lock = SERVER.read(); + let server = server_lock.as_ref().unwrap(); + if call.func == 0 { + let (pid, stdio )= postcard::from_bytes(call.args()).unwrap(); + let ret = postcard::to_stdvec(&server.set_stdio(pid, stdio)).unwrap(); + call.send_return(&ret); + } else if call.func == 1 { + let ret = postcard::to_stdvec(&server.get_stdio(call.from)).unwrap(); + call.send_return(&ret); + } else if call.func == 2 { + let (pid, args )= postcard::from_bytes(call.args()).unwrap(); + let ret = postcard::to_stdvec(&server.set_cli_args(pid, args)).unwrap(); + call.send_return(&ret); + } else if call.func == 3 { + let ret = postcard::to_stdvec(&server.get_cli_args(call.from)).unwrap(); + call.send_return(&ret); + } else if call.func == 4 { + let code = postcard::from_bytes(call.args()).unwrap(); + let ret = postcard::to_stdvec(&server.exit(call.from, code)).unwrap(); + call.send_return(&ret); + } else if call.func == 5 { + let (pid, block) = postcard::from_bytes(call.args()).unwrap(); + let ret = postcard::to_stdvec(&server.wait(call.from, pid, block)).unwrap(); + call.send_return(&ret); + } else if call.func == 6 { + let (pid, parent) = postcard::from_bytes(call.args()).unwrap(); + let _ = server.new_proc(pid, parent); + //let ret = postcard::to_stdvec(&server.new_proc(pid, parent)).unwrap(); + //call.send_return(&ret); + } else if call.func == 7 { + let (pid, parent) = postcard::from_bytes(call.args()).unwrap(); + let ret = postcard::to_stdvec(&server.new_proc(pid, parent)).unwrap(); + call.send_return(&ret); + } +} diff --git a/proc_man_structs/Cargo.lock b/proc_man_structs/Cargo.lock new file mode 100644 index 0000000..af7e52d --- /dev/null +++ b/proc_man_structs/Cargo.lock @@ -0,0 +1,61 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +version = 3 + +[[package]] +name = "proc-macro2" +version = "1.0.86" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "5e719e8df665df0d1c8fbfd238015744736151d4445ec0836b8e628aae103b77" +dependencies = [ + "unicode-ident", +] + +[[package]] +name = "proc_man_structs" +version = "0.1.0" +dependencies = [ + "serde", +] + +[[package]] +name = "quote" +version = "1.0.37" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = 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+version = "0.1.0" +edition = "2021" + +[dependencies] +serde = { path = "../../serde/serde", features = ["derive"] } + +[patch.crates-io] +serde = { path = "../../serde/serde" } +serde_derive = { path = "../../serde/serde_derive" } diff --git a/proc_man_structs/src/lib.rs b/proc_man_structs/src/lib.rs new file mode 100644 index 0000000..ce79948 --- /dev/null +++ b/proc_man_structs/src/lib.rs @@ -0,0 +1,7 @@ +use serde::{Deserialize, Serialize}; + +#[derive(Serialize, Deserialize)] +pub struct WaitResult { + pub pid: u64, + pub exit_code: u8, +} diff --git a/rust-toolchain.toml b/rust-toolchain.toml new file mode 100644 index 0000000..a5535e3 --- /dev/null +++ b/rust-toolchain.toml @@ -0,0 +1,2 @@ +[toolchain] +channel = "dev-x86_64-unknown-mikros" diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..a708e60 --- /dev/null +++ b/src/main.rs @@ -0,0 +1,126 @@ +use std::{collections::HashMap, os::mikros::{self, ipc, syscalls, Errno}}; + +use parking_lot::RwLock; + +#[derive(Clone, Copy)] +enum ProcessStatus { + Running, + Exited(u8), +} + +struct Process { + stdio: [Option<(u64, u64)>; 3], + cli_args: Vec, + status: ProcessStatus, + parent: Option, + children: Vec, +} + +struct Serv { + processes: RwLock>, +} + +impl proc_man_rpc::Server for Serv { + fn new_proc(&self, pid: u64, parent: Option) -> Result<(), Errno> { + let syslog_pid = syscalls::try_get_registered(2).unwrap(); + let syslog_client = syslog_rpc::Client::new(syslog_pid); + syslog_client.send_text_message("proc_man", format!("Process {pid} created with parent {parent:?}")).unwrap(); + self.processes.write().insert(pid, Process { + stdio: [None; 3], + cli_args: Vec::new(), + status: ProcessStatus::Running, + parent, + children: Vec::new(), + }); + if let Some(parent) = parent { + self.processes.write().get_mut(&parent).unwrap().children.push(pid); + }; + Ok(()) + } + + fn set_stdio(&self, pid: u64, stdio: [Option<(u64, u64)>; 3]) -> Result<(), Errno> { + self.processes.write().get_mut(&pid).ok_or(Errno::ESRCH)?.stdio = stdio; + Ok(()) + } + + fn get_stdio(&self, from: u64) -> [Option<(u64, u64)>; 3] { + self.processes.read().get(&from).map_or([None; 3], |proc| proc.stdio) + } + + fn set_cli_args(&self, pid: u64, args: Vec) -> Result<(), Errno> { + self.processes.write().get_mut(&pid).ok_or(Errno::ESRCH)?.cli_args = args; + Ok(()) + } + + fn get_cli_args(&self, from: u64) -> Vec { + self.processes.read().get(&from).map_or(Vec::new(), |proc| proc.cli_args.clone()) + } + + fn exit(&self, from: u64, code: u8) { + if let Some(proc) = self.processes.write().get_mut(&from) { + proc.status = ProcessStatus::Exited(code); + } + } + + fn wait(&self, from: u64, pid: u64, block: bool) -> Result { + let processes = self.processes.read(); + let proc = processes.get(&from).ok_or(Errno::ESRCH)?; + if pid != 0 && !proc.children.contains(&pid) { + return Err(Errno::ECHILD); + } + std::mem::drop(processes); + if pid == 0 { + loop { + let processes = self.processes.read(); + let proc = processes.get(&from).ok_or(Errno::ESRCH)?; + for &pid in &proc.children { + let proc_status = self.processes.read().get(&pid).unwrap().status; + if let ProcessStatus::Exited(code) = proc_status { + self.processes.write().remove(&pid); + syscalls::clear_exited(pid).unwrap(); + self.processes.write().get_mut(&from).unwrap().children.retain(|&child| child != pid); + return Ok(proc_man_rpc::WaitResult { pid, exit_code: code }); + }; + } + std::mem::drop(processes); + if !block { + return Err(Errno::EAGAIN); + } + ipc::process_messages(); + } + } else { + loop { + let proc_status = self.processes.read().get(&pid).unwrap().status; + if let ProcessStatus::Exited(code) = proc_status { + self.processes.write().remove(&pid); + syscalls::clear_exited(pid).unwrap(); + self.processes.write().get_mut(&from).unwrap().children.retain(|&child| child != pid); + return Ok(proc_man_rpc::WaitResult { pid, exit_code: code }); + }; + if !block { + return Err(Errno::EAGAIN); + } + ipc::process_messages(); + } + } + } + +} + +fn main() { + let syslog_pid = loop { + if let Some(pid) = syscalls::try_get_registered(2) { + break pid; + } + }; + let syslog_client = syslog_rpc::Client::new(syslog_pid); + let serv = Serv { + processes: RwLock::new(HashMap::new()), + }; + proc_man_rpc::register_server(Box::new(serv)); + syscalls::register(3); + syslog_client.send_text_message("proc_man", "Process manager initialized").unwrap(); + loop { + ipc::process_messages(); + } +}