Cargo.lock

@@ -17,21 +17,6 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
-[[package]]
-name = "aho-corasick"
-version = "1.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b2969dcb958b36655471fc61f7e416fa76033bdd4bfed0678d8fee1e2d07a1f0"
-dependencies = [
- "memchr",
-]
-
-[[package]]
-name = "anyhow"
-version = "1.0.75"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a4668cab20f66d8d020e1fbc0ebe47217433c1b6c8f2040faf858554e394ace6"
-
 [[package]]
 name = "autocfg"
 version = "1.1.0"
@@ -110,12 +95,6 @@ version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d77f7ec81a6d05a3abb01ab6eb7590f6083d08449fe5a1c8b1e620283546ccb7"
 
-[[package]]
-name = "lazy_static"
-version = "1.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
-
 [[package]]
 name = "libc"
 version = "0.2.150"
@@ -244,35 +223,6 @@ dependencies = [
  "bitflags 1.3.2",
 ]
 
-[[package]]
-name = "regex"
-version = "1.10.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "380b951a9c5e80ddfd6136919eef32310721aa4aacd4889a8d39124b026ab343"
-dependencies = [
- "aho-corasick",
- "memchr",
- "regex-automata",
- "regex-syntax",
-]
-
-[[package]]
-name = "regex-automata"
-version = "0.4.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5f804c7828047e88b2d32e2d7fe5a105da8ee3264f01902f796c8e067dc2483f"
-dependencies = [
- "aho-corasick",
- "memchr",
- "regex-syntax",
-]
-
-[[package]]
-name = "regex-syntax"
-version = "0.8.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"
-
 [[package]]
 name = "rustc-demangle"
 version = "0.1.23"
@@ -321,26 +271,6 @@ dependencies = [
  "unicode-ident",
 ]
 
-[[package]]
-name = "thiserror"
-version = "1.0.50"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f9a7210f5c9a7156bb50aa36aed4c95afb51df0df00713949448cf9e97d382d2"
-dependencies = [
- "thiserror-impl",
-]
-
-[[package]]
-name = "thiserror-impl"
-version = "1.0.50"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "266b2e40bc00e5a6c09c3584011e08b06f123c00362c92b975ba9843aaaa14b8"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
 [[package]]
 name = "tokio"
 version = "1.34.0"
@@ -466,11 +396,7 @@ checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
 name = "wingmate-rs"
 version = "0.1.0"
 dependencies = [
- "anyhow",
- "lazy_static",
  "nix",
- "regex",
- "thiserror",
  "tokio",
  "tokio-util",
 ]

Cargo.toml

@@ -6,10 +6,6 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-anyhow = "1.0.75"
-lazy_static = "1.4.0"
 nix = {version = "0.27.1", features = ["process", "signal", "fs"]}
-regex = "1.10.2"
-thiserror = "1.0.50"
 tokio = { version = "1.34.0", features = ["full"] }
 tokio-util = "0.7.10"

docker/Dockerfile

@@ -1,7 +1,7 @@
 FROM ubuntu:22.04
 
 ADD target/debug/init /usr/local/bin/init
-ADD docker/etc/ /etc/
+ADD docker/ /
 
 RUN chmod ugo+x /etc/wingmate/services/one && chmod ugo+x /etc/wingmate/services/two.sh && \
     chmod ugo-x /etc/wingmate/services/three.sh

docker/etc/wingmate/crontab

@@ -1,3 +0,0 @@
-17 * * * * sleep 1
-*/12 * * * * sleep 1
-12,17,27 * * * * sleep 1

docker/etc/wingmate/services/one

@@ -1 +1,3 @@
-you cannot run this file
+#!/bin/bash
+
+exec sleep 1

src/bin/init.rs

@@ -4,10 +4,5 @@ use wingmate_rs::init;
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn error::Error>> {
-    if let Err(e) = init::start().await {
+    init::start().await
-        eprintln!("{}", e);
-        return Err(e.into());
-    }
-
-    Ok(())
 }

src/init.rs

@@ -2,31 +2,10 @@ mod daemon;
 mod config;
 pub(crate) mod error;
 
-use std::env;
+use std::error as std_err;
-use anyhow::Context;
 
-const WINGMATE_CONFIG_PATH: &'static str = "WINGMATE_CONFIG_PATH";
+pub async fn start() -> Result<(), Box<dyn std_err::Error>> {
-
+    let _config = config::Config::find(vec![String::from("/etc/wingmate")])?;
-pub async fn start() -> Result<(), error::WingmateInitError> {
+    dbg!(_config);
-    let mut vec_search: Vec<String> = Vec::new();
+    daemon::start().await
-
-    match env::var(WINGMATE_CONFIG_PATH) {
-        Ok(paths) => {
-            for p in paths.split(':') {
-                vec_search.push(String::from(p));
-            }
-        },
-        Err(e) => {
-            if let env::VarError::NotUnicode(_) = e {
-                return Err(e).context(format!("reading {} env var", WINGMATE_CONFIG_PATH))
-                    .map_err(|e| {error::WingmateInitError::Other { source: e }} );
-            } else {
-                vec_search.push(String::from("/etc/wingmate"));
-            }
-        }
-    }
-
-    let config = config::Config::find(vec_search)?;
-    dbg!(&config);
-    daemon::start(config).await
 }

src/init/config.rs

@@ -1,24 +1,8 @@
 use std::fs;
-use std::env;
 use std::path::PathBuf;
-use std::io::{BufReader, BufRead};
+use std::error as std_error;
 use crate::init::error as wingmate_error;
 use nix::unistd::{access, AccessFlags};
-use lazy_static::lazy_static;
-use regex::Regex;
-use anyhow::Context;
-
-const CRON_REGEX_STR: &'static str = r"^\s*(?P<minute>\S+)\s+(?P<hour>\S+)\s+(?P<dom>\S+)\s+(?P<month>\S+)\s+(?P<dow>\S+)\s+(?P<command>\S.*\S)\s*$";
-const MINUTE: &'static str = "minute";
-const HOUR: &'static str = "hour";
-const DAY_OF_MONTH_ABBRV: &'static str = "dom";
-const DAY_OF_MONTH: &'static str = "day of month";
-const MONTH: &'static str = "month";
-const DAY_OF_WEEK_ABBRV: &'static str = "dow";
-const DAY_OF_WEEK: &'static str = "day of week";
-const COMMAND: &'static str = "command";
-const WINGMATE_SHELL_ENV: &'static str = "WINGMATE_SHELL";
-
 
 #[derive(Debug)]
 pub enum Command {
@@ -26,40 +10,19 @@ pub enum Command {
     Direct(String)
 }
 
-#[derive(Debug)]
-pub enum CronTimeFieldSpec {
-    Any,
-    Exact(u8),
-    MultiOccurrence(Vec<u8>),
-    Every(u8)
-}
-
-#[derive(Debug)]
-pub struct Crontab {
-    pub minute: CronTimeFieldSpec,
-    pub hour: CronTimeFieldSpec,
-    pub day_of_month: CronTimeFieldSpec,
-    pub month: CronTimeFieldSpec,
-    pub day_of_week: CronTimeFieldSpec,
-    pub command: String,
-}
-
 #[derive(Debug)]
 pub struct Config {
     pub services: Vec<Command>,
-    pub cron: Vec<Crontab>,
-    shell_path: Option<String>,
 }
 
 impl Config {
-    pub fn find(search_path: Vec<String>) -> Result<Config, wingmate_error::WingmateInitError> {
+    pub fn find(search_path: Vec<String>) -> Result<Config, Box<dyn std_error::Error>> {
         if search_path.is_empty() {
-            return Err(wingmate_error::WingmateInitError::InvalidConfigSearchPath.into());
+            return Err(wingmate_error::InvalidConfigSearchPathError.into());
         }
 
         let mut svc_commands: Vec<Command> = Vec::new();
-        let mut cron : Vec<Crontab> = Vec::new();
+        for p in search_path {
-        'search: for p in search_path {
             let mut buf = PathBuf::new();
             buf.push(p);
             if let Ok(m) = fs::metadata(buf.as_path()) {
@@ -71,20 +34,22 @@ impl Config {
                                 let ep = dirent.path();
                                 if let Ok(_) = access(ep.as_path(), AccessFlags::X_OK) {
                                     // execute directly
-                                    svc_commands.push(Command::Direct(String::from(ep.to_string_lossy())));
+                                    svc_commands.push(Command::Direct(String::from(ep.as_path().to_string_lossy())));
                                 } else {
                                     // call with shell
-                                    svc_commands.push(Command::ShellPrefixed(String::from(ep.to_string_lossy())));
+                                    svc_commands.push(Command::ShellPrefixed(String::from(ep.as_path().to_string_lossy())));
                                 }
                             }
                         }
                     }
 
-                    cron = Self::read_crontab(&mut buf).map_err(|e| { wingmate_error::WingmateInitError::Cron { source: e }})?;
+                    let cron = buf.join("cron");
-
+                    if let Ok(cron_iter) = fs::read_dir(cron.as_path()) {
-                    //TODO: need to include cron in the condition
+                        for entry in cron_iter {
-                    if !svc_commands.is_empty() || !cron.is_empty() {
+                            if let Ok(_dirent) = entry {
-                        break 'search;
+                                // read the cron file
+                            }
+                        }
                     }
                 } else {
                     // reserve for future use; when we have a centralized config file
@@ -92,193 +57,11 @@ impl Config {
             }
         }
 
-        if svc_commands.is_empty() && cron.is_empty() {
+        if svc_commands.is_empty() {
-            return Err(wingmate_error::WingmateInitError::NoServiceOrCron.into());
+            return Err(wingmate_error::NoServiceOrCronFoundError.into());
         }
 
-        let mut config = Config { 
+        let config = Config { services: svc_commands };
-            services: svc_commands,
-            cron,
-            shell_path: None,
-        };
-        config.find_shell().map_err(|e| { wingmate_error::WingmateInitError::FindShell { source: e } })?;
-
         Ok(config)
     }
-
-    fn read_crontab(path: &mut PathBuf) -> Result<Vec<Crontab>, wingmate_error::CronParseError> {
-        lazy_static! {
-            static ref CRON_REGEX: Regex = Regex::new(CRON_REGEX_STR).unwrap();
-        }
-
-        let cron_path = path.join("crontab");
-        let mut ret_vec: Vec<Crontab> = Vec::new();
-
-        if let Ok(f) = fs::File::open(cron_path.as_path()) {
-            for line in BufReader::new(f).lines() {
-                if let Ok(l) = line {
-                    let cap = CRON_REGEX.captures(&l).ok_or::<wingmate_error::CronParseError>(
-                        wingmate_error::CronParseError::InvalidSyntax(String::from(&l))
-                    )?;
-                    
-                    let mut match_str = cap.name(MINUTE).ok_or::<wingmate_error::CronParseError>(
-                        wingmate_error::CronParseError::FieldMatch { cron_line: String::from(&l), field_name: String::from(MINUTE) }
-                    )?;
-                    let minute = Self::to_cron_time_field_spec(&match_str).map_err(|e| { 
-                        wingmate_error::CronParseError::Parse {
-                            source: e,
-                            cron_line: String::from(&l),
-                            matched: String::from(match_str.as_str()),
-                            field_name: String::from(MINUTE)
-                        }
-                    })?;
-    
-                    match_str = cap.name(HOUR).ok_or::<wingmate_error::CronParseError>(
-                        wingmate_error::CronParseError::FieldMatch { cron_line: String::from(&l), field_name: String::from(HOUR) }
-                    )?;
-                    let hour = Self::to_cron_time_field_spec(&match_str).map_err(|e| { 
-                        wingmate_error::CronParseError::Parse {
-                            source: e,
-                            cron_line: String::from(&l),
-                            matched: String::from(match_str.as_str()),
-                            field_name: String::from(HOUR)
-                        }
-                    })?;
-    
-                    match_str = cap.name(DAY_OF_MONTH_ABBRV).ok_or::<wingmate_error::CronParseError>(
-                        wingmate_error::CronParseError::FieldMatch { cron_line: String::from(&l), field_name: String::from(DAY_OF_MONTH) }
-                    )?;
-                    let dom = Self::to_cron_time_field_spec(&match_str).map_err(|e| {
-                        wingmate_error::CronParseError::Parse {
-                            source: e,
-                            cron_line: String::from(&l),
-                            matched: String::from(match_str.as_str()),
-                            field_name: String::from(DAY_OF_MONTH)
-                        }
-                    })?;
-    
-                    match_str = cap.name(MONTH).ok_or::<wingmate_error::CronParseError>(
-                        wingmate_error::CronParseError::FieldMatch { cron_line: String::from(&l), field_name: String::from(MONTH) }
-                    )?;
-                    let month = Self::to_cron_time_field_spec(&match_str).map_err(|e| {
-                        wingmate_error::CronParseError::Parse {
-                            source: e,
-                            cron_line: String::from(&l),
-                            matched: String::from(match_str.as_str()),
-                            field_name: String::from(MONTH)
-                        }
-                    })?;
-    
-                    match_str = cap.name(DAY_OF_WEEK_ABBRV).ok_or::<wingmate_error::CronParseError>(
-                        wingmate_error::CronParseError::FieldMatch { cron_line: String::from(&l), field_name: String::from(DAY_OF_WEEK) }
-                    )?;
-                    let dow = Self::to_cron_time_field_spec(&match_str).map_err(|e| {
-                        wingmate_error::CronParseError::Parse {
-                            source: e,
-                            cron_line: String::from(&l),
-                            matched: String::from(match_str.as_str()),
-                            field_name: String::from(DAY_OF_WEEK)
-                        }
-                    })?;
-    
-                    match_str = cap.name(COMMAND).ok_or::<wingmate_error::CronParseError>(
-                        wingmate_error::CronParseError::FieldMatch { cron_line: String::from(&l), field_name: String::from(COMMAND) }
-                    )?;
-    
-                    ret_vec.push(Crontab {
-                        minute,
-                        hour,
-                        day_of_month: dom,
-                        month,
-                        day_of_week: dow,
-                        command: String::from(match_str.as_str())
-                    })
-                }
-            }
-        }
-
-        Ok(ret_vec)
-    }
-
-    fn to_cron_time_field_spec(match_str: &regex::Match) -> Result<CronTimeFieldSpec, anyhow::Error> {
-        let field = match_str.as_str();
-
-        if field == "*" {
-            return Ok(CronTimeFieldSpec::Any);
-        } else if field.starts_with("*/") {
-            let every = field[2..].parse::<u8>().context("parsing on field matching \"every\" pattern")?;
-            return Ok(CronTimeFieldSpec::Every(every));
-        } else if field.contains(",") {
-            let multi: Vec<&str> = field.split(",").collect();
-            let mut multi_occurrence: Vec<u8> = Vec::new();
-
-            for m in multi {
-                let ur = m.parse::<u8>().context("parsing on field matching \"multi occurrence\" pattern")?;
-                multi_occurrence.push(ur);
-            }
-
-            return Ok(CronTimeFieldSpec::MultiOccurrence(multi_occurrence));
-        } else {
-            let n = field.parse::<u8>().context("parsing on field matching \"exact\" pattern")?;
-            return Ok(CronTimeFieldSpec::Exact(n));
-        }
-    }
-
-    fn find_shell(&mut self) -> Result<(), wingmate_error::FindShellError> {
-
-        let  shell: String;
-        match env::var(WINGMATE_SHELL_ENV) {
-            Ok(sh) => {
-                shell = sh;
-            },
-            Err(e) => {
-                match e {
-                    env::VarError::NotPresent => {
-                        shell = String::from("sh");
-                    },
-                    env::VarError::NotUnicode(_) => {
-                        return Err(e).context(format!("reading {} env var", WINGMATE_SHELL_ENV))
-                            .map_err(|e| { wingmate_error::FindShellError::Other { source: e } })
-                    }
-                }
-            }
-        }
-
-        let env_path  = env::var("PATH").context("getting PATH env variable")
-            .map_err(|e| { wingmate_error::FindShellError::Other { source: e } })?;
-        let vec_path: Vec<&str> = env_path.split(':').collect();
-
-        for p in vec_path {
-            let mut search_path = PathBuf::new();
-            search_path.push(p);
-
-            let shell_path = search_path.join(&shell);
-            if let Ok(_) = fs::metadata(shell_path.as_path()) {
-                self.shell_path = Some(String::from(shell_path.to_string_lossy()));
-                return Ok(());
-            }
-        }
-
-        Err(wingmate_error::FindShellError::ShellNotFound)
-    }
-
-    pub fn get_service_iter(&self) -> std::slice::Iter<Command> {
-        self.services.iter()
-    }
-
-    pub fn get_shell(&self) -> Option<String> {
-        if let Some(shell) = &self.shell_path {
-            return Some(shell.clone());
-        }
-        None
-    }
-}
-
-impl Clone for Command {
-    fn clone(&self) -> Self {
-        match self {
-            Command::Direct(d) => Command::Direct(String::from(d)),
-            Command::ShellPrefixed(s) => Command::ShellPrefixed(String::from(s))
-        }
-    }
 }

src/init/daemon.rs

@@ -3,14 +3,12 @@ mod waiter;
 mod starter;
 mod constants;
 
+use std::error;
 use tokio::task::JoinSet;
 use tokio_util::sync::CancellationToken;
 use std::sync::{Arc, Mutex};
-use crate::init::config;
-use crate::init::error as wmerr;
-use crate::init::error::WingmateInitError;
 
-pub async fn start(cfg: config::Config) -> Result<(), WingmateInitError> {
+pub async fn start() -> Result<(), Box<dyn error::Error>> {
     let sync_flag = Arc::new(Mutex::new(false));
     let sig_sync_flag = sync_flag.clone();
 
@@ -20,13 +18,13 @@ pub async fn start(cfg: config::Config) -> Result<(), WingmateInitError> {
     let cancel = CancellationToken::new();
     let starter_cancel = cancel.clone();
 
-    let mut set: JoinSet<Result<(), wmerr::WingmateInitError>> = JoinSet::new();
+    let mut set: JoinSet<Result<(), Box<dyn error::Error + Send + Sync>>> = JoinSet::new();
     set.spawn(async move {
         sighandler::sighandler(sig_sync_flag, cancel, sighandler_cancel).await
     });
 
     //TODO: start the process starter
-    starter::start_services(&mut set, &cfg, starter_cancel)?;
+    starter::start_process(&mut set, starter_cancel);
 
     //TODO: spawn_blocking for waiter
     set.spawn_blocking(move || {
@@ -39,20 +37,12 @@ pub async fn start(cfg: config::Config) -> Result<(), WingmateInitError> {
             Ok(v) => {
                 if let Err(ev) = v {
                     dbg!(&ev);
-                    match ev {
+                    return Err(ev as Box<dyn error::Error>);
-                        WingmateInitError::SpawnError { source, message } => {
-                            eprintln!("{}", WingmateInitError::SpawnError { source, message });
-                        },
-                        _ => {
-                            return Err(ev);
-                        }
-                    }
-                    // return Err(ev as Box<dyn error::Error>);
                 }
             },
             Err(e) => {
                 dbg!(&e);
-                return Err(WingmateInitError::Join { source: e });
+                return Err(e.into());
             },
         }
     }

src/init/daemon/sighandler.rs

@@ -1,13 +1,13 @@
+use std::error;
 use tokio::signal::unix::{signal, SignalKind};
 use tokio::select;
 use std::sync::{Arc, Mutex};
 use tokio_util::sync::CancellationToken;
-use crate::init::error::WingmateInitError;
 
-pub async fn sighandler(flag: Arc<Mutex<bool>>, cancel: CancellationToken, exit: CancellationToken) -> Result<(), WingmateInitError> {
+pub async fn sighandler(flag: Arc<Mutex<bool>>, cancel: CancellationToken, exit: CancellationToken) -> Result<(), Box<dyn error::Error + Send + Sync>> {
-    let mut sigint = signal(SignalKind::interrupt()).map_err(|e| { WingmateInitError::Signal { source: e } })?; 
+    let mut sigint = signal(SignalKind::interrupt())?; 
-    let mut sigterm = signal(SignalKind::terminate()).map_err(|e| { WingmateInitError::Signal { source: e } })?;
+    let mut sigterm = signal(SignalKind::terminate())?;
-    let mut sigchld = signal(SignalKind::child()).map_err(|e| { WingmateInitError::Signal { source: e } })?;
+    let mut sigchld = signal(SignalKind::child())?;
 
     'signal: loop {
         select! {

src/init/daemon/starter.rs

@@ -1,49 +1,26 @@
 use tokio::task::JoinSet;
-use tokio::process::{Command, Child};
+use tokio::process::Command;
 use tokio_util::sync::CancellationToken;
 use tokio::select;
 use tokio::io::Result as tokio_result;
 use tokio::time::sleep;
 use std::time::Duration;
 use std::process::ExitStatus;
+use std::error;
 use nix::sys::signal::{kill, Signal};
 use nix::errno::Errno;
 use nix::unistd::Pid;
-use anyhow::Context;
-use crate::init::config;
-use crate::init::error::WingmateInitError;
 
 
-pub fn start_services(ts: &mut JoinSet<Result<(), WingmateInitError>>, cfg: &config::Config, cancel: CancellationToken)
+pub fn start_process(ts: &mut JoinSet<Result<(), Box<dyn error::Error + Send + Sync>>>, cancel: CancellationToken) {
-    -> Result<(), WingmateInitError> {
+    for _j in 0..5 {
-
-    for svc_ in cfg.get_service_iter() {
-        let mut shell: String = String::new();
-        if let config::Command::ShellPrefixed(_) = svc_ {
-            shell = cfg.get_shell().ok_or::<WingmateInitError>(WingmateInitError::NoShellAvailable)?;
-        }
-        let svc = svc_.clone();
         let cancel = cancel.clone();
         ts.spawn(async move {
             'autorestart: loop {
-                let mut child: Child;
+                let mut child = Command::new("sleep").arg("1")
-                let svc = svc.clone();
+                    .spawn()
-                match svc {
+                    .expect("failed to spawn");
-                    config::Command::Direct(c) => {
+
-                        let exp_str = c.clone();
-                        child = Command::new(c).spawn().map_err(|e| {
-                            WingmateInitError::SpawnError { source: e, message: exp_str }
-                        })?;
-                    },
-                    config::Command::ShellPrefixed(s) => {
-                        let shell = shell.clone();
-                        let exp_str = s.clone();
-                        let exp_shell = shell.clone();
-                        child = Command::new(shell).arg(s).spawn().map_err(|e| {
-                            WingmateInitError::SpawnError { source: e, message: format!("{} {}", exp_shell, exp_str) }
-                        })?;
-                    } 
-                }
 
                 select! {
                     _ = cancel.cancelled() => {
@@ -56,7 +33,7 @@ pub fn start_services(ts: &mut JoinSet<Result<(), WingmateInitError>>, cfg: &con
                                         },
                                         result = child.wait() => {
                                             if let Err(e) = result_match(result) {
-                                                return Err(WingmateInitError::ChildExit { source: e });
+                                                return Err(e);
                                             }
                                             break 'autorestart;
                                         }
@@ -64,7 +41,7 @@ pub fn start_services(ts: &mut JoinSet<Result<(), WingmateInitError>>, cfg: &con
                                 },
                                 Err(e) => {
                                     if e != Errno::ESRCH {
-                                        return Err(WingmateInitError::ChildNotFound);
+                                        return Err(e.into());
                                     } else {
                                         break 'autorestart;
                                     }
@@ -76,33 +53,32 @@ pub fn start_services(ts: &mut JoinSet<Result<(), WingmateInitError>>, cfg: &con
                     },
                     result = child.wait() => {
                         if let Err(e) = result_match(result) {
-                            return Err(WingmateInitError::ChildExit { source: e });
+                            return Err(e);
                         }
                     },
                 }
             }
-            dbg!("starter: task completed");
+            println!("starter: task completed");
             Ok(())
         });
 
     }
-    dbg!("starter: spawning completed");
+    println!("starter: spawning completed");
-
-    Ok(())
 }
 
-fn result_match(result: tokio_result<ExitStatus>) -> Result<(), anyhow::Error> {
+fn result_match(result: tokio_result<ExitStatus>) -> Result<(), Box<dyn error::Error + Send + Sync>> {
     if let Err(e) = result {
         if let Some(eos) = e.raw_os_error() {
             if eos != nix::Error::ECHILD as i32 {
-                return Err(e).context("unexpected child exit status");
+                return Err(e.into());
             }
         } else {
-            return Err(e).context("unexpected child error");
+            return Err(e.into());
         }
     }
 
-    dbg!("starter: sleep exited");
+    //TODO: remove me! this is for debug + tracing purpose
+    println!("starter: sleep exited");
 
     Ok(())
 }

src/init/daemon/waiter.rs

@@ -37,6 +37,7 @@ pub fn wait_all(flag: Arc<Mutex<bool>>, stop_sighandler: CancellationToken) {
                 }
             },
         }
+        // dbg!("sanity");
     }
 
 }

src/init/error.rs

@@ -1,92 +1,25 @@
-use thiserror::Error;
+use std::fmt;
+use std::error;
 
-#[derive(Error,Debug)]
+#[derive(Debug, Clone)]
-pub enum WingmateInitError {
+pub struct InvalidConfigSearchPathError;
-    #[error("invalid config search path")]
-    InvalidConfigSearchPath,
 
-    #[error("no service or cron found")]
+impl fmt::Display for InvalidConfigSearchPathError {
-    NoServiceOrCron,
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-    
+        write!(f, "invalid config search path")
-    #[error("failed to spawn: {}", message)]
-    SpawnError {
-        #[source]
-        source: std::io::Error,
-        message: String,
-    },
-
-    #[error("parsing cron")]
-    Cron {
-        #[source]
-        source: CronParseError,        
-    },
-
-    #[error("looking for shell")]
-    FindShell {
-        #[source]
-        source: FindShellError,
-    },
-
-    #[error("child exited")]
-    ChildExit {
-        #[source]
-        source: anyhow::Error,
-    },
-
-    #[error("cannot find the child process")]
-    ChildNotFound,
-
-    #[error("failed to setup signal handler")]
-    Signal {
-        #[source]
-        source: std::io::Error,
-    },
-
-    #[error("no shell available")]
-    NoShellAvailable,
-
-    #[error("problem when join task")]
-    Join {
-        #[source]
-        source: tokio::task::JoinError,
-    },
-
-    #[error("tripped over")]
-    Other {
-        #[source]
-        source: anyhow::Error,
     }
 }
 
-#[derive(Error,Debug)]
+impl error::Error for InvalidConfigSearchPathError {}
-pub enum CronParseError {
-    #[error("invalid cron syntax: {}", .0)]
-    InvalidSyntax(String),
 
-    #[error("cannot capture {} in \"{}\"", field_name, cron_line)]
-    FieldMatch {
-        cron_line: String,
-        field_name: String,
-    },
 
-    #[error("failed to parse {} \"{}\" in \"{}\"", field_name, matched, cron_line)]
+#[derive(Debug,Clone)]
-    Parse {
+pub struct NoServiceOrCronFoundError;
-        #[source]
+
-        source: anyhow::Error,
+impl fmt::Display for NoServiceOrCronFoundError {
-        cron_line: String,
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        matched: String,
+        write!(f, "no service or cron found")
-        field_name: String,
     }
 }
 
-#[derive(Error,Debug)]
+impl error::Error for NoServiceOrCronFoundError {}
-pub enum FindShellError {
-    #[error("shell not found")]
-    ShellNotFound,
-
-    #[error("when finding shell")]
-    Other {
-        #[source]
-        source: anyhow::Error
-    }
-}