.devcontainer/devcontainer.json

@@ -18,8 +18,7 @@
       "extensions": [
         "golang.go",
         "ms-azuretools.vscode-docker",
-        "ms-vscode.makefile-tools",
+        "ms-vscode.makefile-tools"
-        "ms-vscode.cpptools-extension-pack"
       ]
     }
   }

.gitignore

@@ -1,3 +1 @@
-/cmd/wingmate/wingmate
+/cmd/wingmate/wingmate
-/cmd/pidproxy/pidproxy
-/cmd/exec/exec

Makefile

@@ -1,6 +1,6 @@
-DESTDIR = /usr/local/bin
 
-all: wingmate dummy oneshot spawner starter pidproxy exec
+
+all: wingmate dummy oneshot spawner starter pidproxy
 
 wingmate:
 	$(MAKE) -C cmd/wingmate all
@@ -8,9 +8,6 @@ wingmate:
 pidproxy:
 	$(MAKE) -C cmd/pidproxy all
 
-exec:
-	$(MAKE) -C cmd/exec all
-
 dummy:
 	$(MAKE) -C cmd/experiment/dummy all
 
@@ -26,18 +23,7 @@ starter:
 clean:
 	$(MAKE) -C cmd/wingmate clean
 	$(MAKE) -C cmd/pidproxy clean
-	$(MAKE) -C cmd/exec clean
 	$(MAKE) -C cmd/experiment/dummy clean
 	$(MAKE) -C cmd/experiment/oneshot clean
 	$(MAKE) -C cmd/experiment/spawner clean
 	$(MAKE) -C cmd/experiment/starter clean
-
-install:
-	install -d ${DESTDIR}
-	$(MAKE) -C cmd/wingmate DESTDIR=${DESTDIR} install
-	$(MAKE) -C cmd/pidproxy DESTDIR=${DESTDIR} install
-	$(MAKE) -C cmd/exec DESTDIR=${DESTDIR} install
-	$(MAKE) -C cmd/experiment/dummy DESTDIR=${DESTDIR} install
-	$(MAKE) -C cmd/experiment/oneshot DESTDIR=${DESTDIR} install
-	$(MAKE) -C cmd/experiment/spawner DESTDIR=${DESTDIR} install
-	$(MAKE) -C cmd/experiment/starter DESTDIR=${DESTDIR} install

cmd/exec/Makefile

@@ -1,8 +0,0 @@
-all:
-	go build -v
-
-clean:
-	go clean -i -cache -testcache
-
-install:
-	install exec ${DESTDIR}/wmexec

cmd/exec/ent.go

@@ -1,11 +0,0 @@
-//go:build !(cgo && linux)
-
-package main
-
-func getUid(user string) (uint64, error) {
-	panic("not implemented")
-}
-
-func getGid(group string) (uint64, error) {
-	panic("not implemented")
-}

cmd/exec/ent_lin.go

@@ -1,51 +0,0 @@
-//go:build cgo && linux
-
-package main
-
-/*
-#include<errno.h>
-#include<string.h>
-#include<sys/types.h>
-#include<pwd.h>
-#include<grp.h>
-
-static uid_t getuid(const char* username) {
-	struct passwd local, *rv;
-	errno = 0;
-	rv = getpwnam(username);
-	if (errno != 0) {
-		return 0;
-	}
-
-	memcpy(&local, rv, sizeof(struct passwd));
-	return local.pw_uid;
-}
-static gid_t getgid(const char* groupname) {
-	struct group local, *rv;
-	errno = 0;
-	rv = getgrnam(groupname);
-	if (errno != 0) {
-		return 0;
-	}
-
-	memcpy(&local, rv, sizeof(struct group));
-	return local.gr_gid;
-}
-*/
-import "C"
-
-func getUid(user string) (uint64, error) {
-	u, err := C.getuid(C.CString(user))
-	if err != nil {
-		return 0, err
-	}
-	return uint64(u), nil
-}
-
-func getGid(group string) (uint64, error) {
-	g, err := C.getgid(C.CString(group))
-	if err != nil {
-		return 0, err
-	}
-	return uint64(g), nil
-}

cmd/exec/exec.go

@@ -1,133 +0,0 @@
-package main
-
-import (
-	"errors"
-	"fmt"
-	"log"
-	"os"
-	"os/exec"
-	"strconv"
-	"strings"
-
-	"gitea.suyono.dev/suyono/wingmate"
-	"github.com/spf13/cobra"
-	"github.com/spf13/viper"
-	"golang.org/x/sys/unix"
-)
-
-const (
-	setsidFlag = "setsid"
-	EnvSetsid  = "SETSID"
-	userFlag   = "user"
-	EnvUser    = "USER"
-)
-
-var (
-	rootCmd = &cobra.Command{
-		Use:  "wmexec",
-		RunE: execCmd,
-	}
-
-	childArgs []string
-)
-
-func main() {
-	var (
-		found    bool
-		i        int
-		arg      string
-		selfArgs []string
-	)
-
-	rootCmd.PersistentFlags().BoolP(setsidFlag, "s", false, "set to true to run setsid() before exec")
-	viper.BindPFlag(EnvSetsid, rootCmd.PersistentFlags().Lookup(setsidFlag))
-
-	rootCmd.PersistentFlags().StringP(userFlag, "u", "", "\"user:[group]\"")
-	viper.BindPFlag(EnvUser, rootCmd.PersistentFlags().Lookup(userFlag))
-
-	viper.SetEnvPrefix(wingmate.EnvPrefix)
-	viper.BindEnv(EnvUser)
-	viper.BindEnv(EnvSetsid)
-	viper.SetDefault(EnvSetsid, false)
-	viper.SetDefault(EnvUser, "")
-
-	found = false
-	for i, arg = range os.Args {
-		if arg == "--" {
-			found = true
-			if len(os.Args) <= i+1 {
-				log.Println("invalid argument")
-				os.Exit(1)
-			}
-			selfArgs = os.Args[1:i]
-			childArgs = os.Args[i+1:]
-			break
-		}
-	}
-	if !found {
-		log.Println("invalid argument")
-		os.Exit(1)
-	}
-
-	if len(childArgs) == 0 {
-		log.Println("invalid argument")
-		os.Exit(1)
-	}
-
-	rootCmd.SetArgs(selfArgs)
-	if err := rootCmd.Execute(); err != nil {
-		log.Println(err)
-		os.Exit(1)
-	}
-}
-
-func execCmd(cmd *cobra.Command, args []string) error {
-	if viper.GetBool(EnvSetsid) {
-		_, _ = unix.Setsid()
-	}
-
-	var (
-		uid  uint64
-		gid  uint64
-		err  error
-		path string
-	)
-
-	ug := viper.GetString(EnvUser)
-	if len(ug) > 0 {
-		user, group, ok := strings.Cut(ug, ":")
-		if ok {
-			if gid, err = strconv.ParseUint(group, 10, 32); err != nil {
-				if gid, err = getGid(group); err != nil {
-					return fmt.Errorf("cgo getgid: %w", err)
-				}
-			}
-			if err = unix.Setgid(int(gid)); err != nil {
-				return fmt.Errorf("setgid: %w", err)
-			}
-		}
-
-		uid, err = strconv.ParseUint(user, 10, 32)
-		if err != nil {
-			if uid, err = getUid(user); err != nil {
-				return fmt.Errorf("cgo getuid: %w", err)
-			}
-		}
-		if err = unix.Setuid(int(uid)); err != nil {
-			return fmt.Errorf("setuid: %w", err)
-		}
-
-	}
-
-	if path, err = exec.LookPath(childArgs[0]); err != nil {
-		if !errors.Is(err, exec.ErrDot) {
-			return fmt.Errorf("lookpath: %w", err)
-		}
-	}
-
-	if err = unix.Exec(path, childArgs, os.Environ()); err != nil {
-		return fmt.Errorf("exec: %w", err)
-	}
-
-	return nil
-}

cmd/experiment/dummy/Makefile

@@ -2,7 +2,4 @@ all:
 	go build -v
 
 clean:
-	go clean -i -cache -testcache
+	go clean -i -cache -testcache
-
-install:
-	install dummy ${DESTDIR}/wmdummy

cmd/experiment/oneshot/Makefile

@@ -2,7 +2,4 @@ all:
 	go build -v
 
 clean:
-	go clean -i -cache -testcache
+	go clean -i -cache -testcache
-
-install:
-	install oneshot ${DESTDIR}/wmoneshot

cmd/experiment/spawner/Makefile

@@ -2,7 +2,4 @@ all:
 	go build -v
 
 clean:
-	go clean -i -cache -testcache
+	go clean -i -cache -testcache
-
-install:
-	install spawner ${DESTDIR}/wmspawner

cmd/experiment/starter/Makefile

@@ -2,7 +2,4 @@ all:
 	go build -v
 
 clean:
-	go clean -i -cache -testcache
+	go clean -i -cache -testcache
-
-install:
-	install starter ${DESTDIR}/wmstarter

cmd/pidproxy/Makefile

@@ -2,7 +2,4 @@ all:
 	go build -v
 
 clean:
-	go clean -i -cache -testcache
+	go clean -i -cache -testcache
-
-install:
-	install pidproxy ${DESTDIR}/wmpidproxy

cmd/pidproxy/pidproxy.go

@@ -4,7 +4,6 @@ import (
 	"log"
 	"os"
 	"os/exec"
-	"os/signal"
 	"strconv"
 	"syscall"
 	"time"
@@ -42,6 +41,11 @@ func main() {
 	viper.BindEnv(EnvStartSecs)
 	viper.SetDefault(EnvStartSecs, EnvDefaultStartSecs)
 
+	if len(os.Args) <= 2 {
+		log.Println("invalid argument")
+		os.Exit(1)
+	}
+
 	rootCmd.PersistentFlags().StringP(pidFileFlag, "p", "", "location of pid file")
 	rootCmd.MarkFlagRequired(pidFileFlag)
 	viper.BindPFlag(pidFileFlag, rootCmd.PersistentFlags().Lookup(pidFileFlag))
@@ -50,11 +54,11 @@ func main() {
 	for i, arg = range os.Args {
 		if arg == "--" {
 			found = true
+			selfArgs = os.Args[1:i]
 			if len(os.Args) <= i+1 {
 				log.Println("invalid argument")
 				os.Exit(1)
 			}
-			selfArgs = os.Args[1:i]
 			childArgs = os.Args[i+1:]
 			break
 		}
@@ -64,11 +68,6 @@ func main() {
 		os.Exit(1)
 	}
 
-	if len(childArgs) == 0 {
-		log.Println("invalid argument")
-		os.Exit(1)
-	}
-
 	rootCmd.SetArgs(selfArgs)
 
 	if err := rootCmd.Execute(); err != nil {
@@ -91,16 +90,7 @@ func pidProxy(cmd *cobra.Command, args []string) error {
 	var (
 		err error
 		pid int
-		sc  chan os.Signal
-		t   *time.Timer
 	)
-
-	sc = make(chan os.Signal, 1)
-	signal.Notify(sc, unix.SIGTERM)
-
-	t = time.NewTimer(time.Second)
-
-check:
 	for {
 		if pid, err = readPid(pidfile); err != nil {
 			return err
@@ -110,20 +100,8 @@ check:
 			return err
 		}
 
-		select {
+		time.Sleep(time.Second)
-		case <-t.C:
-		case <-sc:
-			if pid, err = readPid(pidfile); err != nil {
-				return err
-			}
-
-			if err = unix.Kill(pid, unix.SIGTERM); err != nil {
-				return err
-			}
-			break check
-		}
 	}
-	return nil
 }
 
 func readPid(pidFile string) (int, error) {

cmd/wingmate/Makefile

@@ -2,8 +2,4 @@ all:
 	go build -v
 
 clean:
-	go clean -i -cache -testcache
+	go clean -i -cache -testcache
-
-install:
-	install wingmate ${DESTDIR}/wingmate
-	

config/config.go

@@ -7,7 +7,6 @@ import (
 
 	"gitea.suyono.dev/suyono/wingmate"
 	"github.com/spf13/viper"
-	"golang.org/x/sys/unix"
 )
 
 const (
@@ -49,11 +48,8 @@ func Read() (*Config, error) {
 	if len(dirent) > 0 {
 		for _, d := range dirent {
 			if d.Type().IsRegular() {
-				svcPath := filepath.Join(svcdir, d.Name())
+				serviceAvailable = true
-				if err = unix.Access(svcPath, unix.X_OK); err == nil {
+				outConfig.ServicePaths = append(outConfig.ServicePaths, filepath.Join(svcdir, d.Name()))
-					serviceAvailable = true
-					outConfig.ServicePaths = append(outConfig.ServicePaths, svcPath)
-				}
 			}
 		}
 	}

config/config_test.go

@@ -1,130 +0,0 @@
-package config
-
-import (
-	"os"
-	"path"
-	"testing"
-
-	"gitea.suyono.dev/suyono/wingmate"
-	"github.com/spf13/viper"
-	"github.com/stretchr/testify/assert"
-)
-
-func TestRead(t *testing.T) {
-
-	type testEntry struct {
-		name     string
-		testFunc func(t *testing.T)
-	}
-
-	var (
-		configDir string
-		err       error
-	)
-
-	const serviceDir = "service"
-
-	setup := func(t *testing.T) {
-		if configDir, err = os.MkdirTemp("", "wingmate-*-test"); err != nil {
-			t.Fatal("setup", err)
-		}
-		viper.Set(EnvConfigPath, configDir)
-	}
-
-	tear := func(t *testing.T) {
-		if err = os.RemoveAll(configDir); err != nil {
-			t.Fatal("tear", err)
-		}
-	}
-
-	mkSvcDir := func(t *testing.T) {
-		if err := os.MkdirAll(path.Join(configDir, serviceDir), 0755); err != nil {
-			t.Fatal("create dir", err)
-		}
-	}
-
-	touchFile := func(t *testing.T, name string, perm os.FileMode) {
-		f, err := os.OpenFile(name, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, perm)
-		if err != nil {
-			t.Fatal("create file", err)
-		}
-		_ = f.Close()
-	}
-
-	_ = wingmate.NewLog(os.Stderr)
-	tests := []testEntry{
-		{
-			name: "positive",
-			testFunc: func(t *testing.T) {
-				mkSvcDir(t)
-				touchFile(t, path.Join(configDir, serviceDir, "one.sh"), 0755)
-				touchFile(t, path.Join(configDir, serviceDir, "two.sh"), 0755)
-
-				cfg, err := Read()
-				assert.Nil(t, err)
-				assert.ElementsMatch(
-					t,
-					cfg.ServicePaths,
-					[]string{
-						path.Join(configDir, serviceDir, "one.sh"),
-						path.Join(configDir, serviceDir, "two.sh"),
-					},
-				)
-			},
-		},
-		{
-			name: "with directory",
-			testFunc: func(t *testing.T) {
-				const subdir1 = "subdir1"
-				mkSvcDir(t)
-				assert.Nil(t, os.Mkdir(path.Join(configDir, serviceDir, subdir1), 0755))
-				touchFile(t, path.Join(configDir, serviceDir, subdir1, "one.sh"), 0755)
-				touchFile(t, path.Join(configDir, serviceDir, "two.sh"), 0755)
-				cfg, err := Read()
-				assert.Nil(t, err)
-				assert.ElementsMatch(
-					t,
-					cfg.ServicePaths,
-					[]string{
-						path.Join(configDir, serviceDir, "two.sh"),
-					},
-				)
-			},
-		},
-		{
-			name: "wrong mode",
-			testFunc: func(t *testing.T) {
-				mkSvcDir(t)
-				touchFile(t, path.Join(configDir, serviceDir, "one.sh"), 0755)
-				touchFile(t, path.Join(configDir, serviceDir, "two.sh"), 0644)
-
-				cfg, err := Read()
-				assert.Nil(t, err)
-				assert.ElementsMatch(
-					t,
-					cfg.ServicePaths,
-					[]string{
-						path.Join(configDir, serviceDir, "one.sh"),
-					},
-				)
-			},
-		},
-		{
-			name: "empty",
-			testFunc: func(t *testing.T) {
-				mkSvcDir(t)
-
-				_, err := Read()
-				assert.NotNil(t, err)
-			},
-		},
-	}
-
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			setup(t)
-			tt.testFunc(t)
-			tear(t)
-		})
-	}
-}

docker/alpine/Dockerfile

@@ -2,16 +2,19 @@ FROM golang:1.21-alpine as builder
 
 ADD . /root/wingmate
 WORKDIR /root/wingmate/
-RUN apk add make build-base && CGO_ENABLED=1 make all && make DESTDIR=/usr/local/bin/wingmate install
+RUN apk add make && make all
 
 
 
 FROM alpine:3.18
 
-RUN apk add tzdata && ln -s /usr/share/zoneinfo/Australia/Sydney /etc/localtime && \
+RUN apk add tzdata && ln -s /usr/share/zoneinfo/Australia/Sydney /etc/localtime
-    adduser -h /home/user1 -D -s /bin/sh user1 && \
+COPY --from=builder /root/wingmate/cmd/wingmate/wingmate /usr/local/bin/wingmate
-    adduser -h /home/user2 -D -s /bin/sh user2
+COPY --from=builder /root/wingmate/cmd/experiment/dummy/dummy /usr/local/bin/wmdummy
-COPY --from=builder /usr/local/bin/wingmate/ /usr/local/bin/
+COPY --from=builder /root/wingmate/cmd/experiment/starter/starter /usr/local/bin/wmstarter
+COPY --from=builder /root/wingmate/cmd/experiment/oneshot/oneshot /usr/local/bin/wmoneshot
+COPY --from=builder /root/wingmate/cmd/experiment/spawner/spawner /usr/local/bin/wmspawner
+COPY --from=builder /root/wingmate/cmd/pidproxy/pidproxy /usr/local/bin/wmpidproxy
 ADD --chmod=755 docker/alpine/entry.sh /usr/local/bin/entry.sh
 ADD --chmod=755 docker/alpine/etc /etc
 

docker/alpine/etc/wingmate/service/one.sh

@@ -1,4 +1,4 @@
 #!/bin/sh
 
 export DUMMY_PATH=/usr/local/bin/wmdummy
-exec /usr/local/bin/wmexec --setsid --user user1:user1 -- /usr/local/bin/wmstarter
+exec /usr/local/bin/wmstarter

docker/alpine/etc/wingmate/service/spawner.sh

@@ -2,4 +2,4 @@
 
 export WINGMATE_ONESHOT_PATH=/usr/local/bin/wmoneshot
 export WINGMATE_DUMMY_PATH=/usr/local/bin/wmdummy
-exec /usr/local/bin/wmexec --user 1001 -- /usr/local/bin/wmspawner
+exec /usr/local/bin/wmspawner

docker/bookworm/Dockerfile

@@ -2,16 +2,19 @@ FROM golang:1.21-bookworm as builder
 
 ADD . /root/wingmate
 WORKDIR /root/wingmate/
-RUN make all && make DESTDIR=/usr/local/bin/wingmate install
+RUN make all
 
 
 
 FROM debian:bookworm
 
-RUN ln -sf /usr/share/zoneinfo/Australia/Sydney /etc/localtime && \
+RUN ln -sf /usr/share/zoneinfo/Australia/Sydney /etc/localtime
-    apt update && apt install -y procps && \
+COPY --from=builder /root/wingmate/cmd/wingmate/wingmate /usr/local/bin/wingmate
-    useradd -m -s /bin/bash user1
+COPY --from=builder /root/wingmate/cmd/experiment/dummy/dummy /usr/local/bin/wmdummy
-COPY --from=builder /usr/local/bin/wingmate/ /usr/local/bin/
+COPY --from=builder /root/wingmate/cmd/experiment/starter/starter /usr/local/bin/wmstarter
+COPY --from=builder /root/wingmate/cmd/experiment/oneshot/oneshot /usr/local/bin/wmoneshot
+COPY --from=builder /root/wingmate/cmd/experiment/spawner/spawner /usr/local/bin/wmspawner
+COPY --from=builder /root/wingmate/cmd/pidproxy/pidproxy /usr/local/bin/wmpidproxy
 ADD --chmod=755 docker/bookworm/entry.sh /usr/local/bin/entry.sh
 ADD --chmod=755 docker/bookworm/etc /etc
 

docker/bookworm/etc/wingmate/service/one.sh

@@ -1,4 +1,4 @@
 #!/usr/bin/bash
 
 export DUMMY_PATH=/usr/local/bin/wmdummy
-exec /usr/local/bin/wmexec --setsid --user user1:user1 -- /usr/local/bin/wmstarter
+exec /usr/local/bin/wmstarter

docker/bookworm/etc/wingmate/service/spawner.sh

@@ -2,4 +2,4 @@
 
 export WINGMATE_ONESHOT_PATH=/usr/local/bin/wmoneshot
 export WINGMATE_DUMMY_PATH=/usr/local/bin/wmdummy
-exec /usr/local/bin/wmexec --user 1200 -- /usr/local/bin/wmspawner
+exec /usr/local/bin/wmspawner

go.mod

@@ -28,7 +28,6 @@ require (
 	github.com/spf13/cast v1.6.0 // indirect
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
-	github.com/stretchr/objx v0.5.1 // indirect
 	github.com/subosito/gotenv v1.6.0 // indirect
 	go.uber.org/atomic v1.11.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect

go.sum

@@ -201,15 +201,12 @@ github.com/spf13/viper v1.17.0/go.mod h1:BmMMMLQXSbcHK6KAOiFLz0l5JHrU89OdIRHvsk0
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
 github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
-github.com/stretchr/objx v0.5.1 h1:4VhoImhV/Bm0ToFkXFi8hXNXwpDRZ/ynw3amt82mzq0=
-github.com/stretchr/objx v0.5.1/go.mod h1:/iHQpkQwBD6DLUmQ4pE+s1TXdob1mORJ4/UFdrifcy0=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
-github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 github.com/subosito/gotenv v1.6.0 h1:9NlTDc1FTs4qu0DDq7AEtTPNw6SVm7uBMsUCUjABIf8=

init/init.go

@@ -1,7 +1,6 @@
 package init
 
 import (
-	"os"
 	"sync"
 	"time"
 )
@@ -35,19 +34,17 @@ func (i *Init) Start() {
 		wg             *sync.WaitGroup
 		signalTrigger  chan any
 		sighandlerExit chan any
-		sigchld        chan os.Signal
 	)
 
 	signalTrigger = make(chan any)
 	sighandlerExit = make(chan any)
-	sigchld = make(chan os.Signal, 1)
 
 	wg = &sync.WaitGroup{}
 	wg.Add(1)
-	go i.waiter(wg, signalTrigger, sighandlerExit, sigchld)
+	go i.waiter(wg, signalTrigger, sighandlerExit)
 
 	wg.Add(1)
-	go i.sighandler(wg, signalTrigger, sighandlerExit, sigchld)
+	go i.sighandler(wg, signalTrigger, sighandlerExit)
 
 	for _, s := range i.config.Services() {
 		wg.Add(1)

init/sighandler.go

@@ -9,7 +9,7 @@ import (
 	"golang.org/x/sys/unix"
 )
 
-func (i *Init) sighandler(wg *sync.WaitGroup, trigger chan<- any, selfExit <-chan any, sigchld chan<- os.Signal) {
+func (i *Init) sighandler(wg *sync.WaitGroup, trigger chan<- any, selfExit <-chan any) {
 	defer wg.Done()
 
 	defer func() {
@@ -35,10 +35,7 @@ signal:
 					isOpen = false
 				}
 			case unix.SIGCHLD:
-				select {
+				// do nothing
-				case sigchld <- s:
-				default:
-				}
 			}
 
 		case <-selfExit:

init/waiter.go

@@ -2,20 +2,20 @@ package init
 
 import (
 	"errors"
-	"os"
 	"sync"
+	"time"
 
 	"gitea.suyono.dev/suyono/wingmate"
 	"golang.org/x/sys/unix"
 )
 
-func (i *Init) waiter(wg *sync.WaitGroup, runningFlag <-chan any, sigHandlerFlag chan<- any, sigchld <-chan os.Signal) {
+func (i *Init) waiter(wg *sync.WaitGroup, runningFlag <-chan any, sigHandlerFlag chan<- any) {
 	var (
-		ws               unix.WaitStatus
+		ws unix.WaitStatus
-		err              error
+		// pid     int
-		running          bool
+		err     error
-		flagged          bool
+		running bool
-		waitingForSignal bool
+		flagged bool
 	)
 	defer wg.Done()
 
@@ -25,27 +25,14 @@ func (i *Init) waiter(wg *sync.WaitGroup, runningFlag <-chan any, sigHandlerFlag
 
 	running = true
 	flagged = true
-	waitingForSignal = true
 wait:
 	for {
 		if running {
-			if waitingForSignal {
+			select {
-				select {
+			case <-runningFlag:
-				case <-runningFlag:
+				wingmate.Log().Info().Msg("waiter received shutdown signal...")
-					wingmate.Log().Info().Msg("waiter received shutdown signal...")
+				running = false
-					running = false
+			default:
-				case <-sigchld:
-					waitingForSignal = false
-				}
-
-			} else {
-				select {
-				case <-runningFlag:
-					wingmate.Log().Info().Msg("waiter received shutdown signal...")
-					running = false
-				default:
-				}
-
 			}
 		}
 
@@ -63,7 +50,7 @@ wait:
 			}
 
 			wingmate.Log().Warn().Msgf("Wait4 returns error: %+v", err)
-			waitingForSignal = true
+			time.Sleep(time.Millisecond * 100)
 		}
 	}
 }