Now can reliably run multiple processes and kill them externall at will.

.ozai.json

@@ -1,14 +1,14 @@
 {
   "Processes": {
     "tester1": {
-      "Name": "tester",
+      "Name": "tester1",
       "Command": "tester",
-      "Args": ["-count", "10", "-id", "1"]
+      "Args": ["-count", "100", "-id", "1"]
     },
     "tester2": {
-      "Name": "tester",
+      "Name": "tester2",
       "Command": "tester",
-      "Args": ["-count", "5", "-id", "2"]
+      "Args": ["-count", "500", "-id", "2"]
     }
   }
 }

config/settings.go

@@ -5,16 +5,20 @@ import (
   "log"
   "os"
   "io"
+  "os/exec"
   "encoding/json"
 )
 
-type command struct {
+type Process struct {
   Command string
   Args []string
+  Name string
+  Ready chan string
+  ExecCmd *exec.Cmd
 }
 
 type config struct {
-  Processes map[string]command
+  Processes map[string]Process
   ConfigPath string
 }
 

main.go

@@ -6,6 +6,7 @@ import (
   "log"
   "io"
   "time"
+  "math/rand"
   "os"
   "errors"
   "sync"
@@ -16,12 +17,39 @@ func LaunchLogger(in io.Reader, out io.Writer, err error) {
   if err != nil { log.Fatal(err) }
 
   go func() {
-    if _, err := io.Copy(out, in); err != nil {
-      log.Fatal(err)
-    }
+    if _, err := io.Copy(out, in)
+
+    err != nil { log.Printf("LOGGER: %v", err) }
   }()
 }
 
+func LaunchProcess(proc *config.Process, wg sync.WaitGroup) {
+  defer wg.Done()
+
+  for {
+    proc.ExecCmd = exec.Command(proc.Command, proc.Args...)
+    if errors.Is(proc.ExecCmd.Err, exec.ErrDot) {
+      proc.ExecCmd.Err = nil
+    }
+
+    fmt.Println("STARTING", proc.Name)
+
+    stderr, err := proc.ExecCmd.StderrPipe();
+    LaunchLogger(stderr, os.Stdout, err)
+
+    stdout, err := proc.ExecCmd.StdoutPipe();
+    LaunchLogger(stdout, os.Stdout, err)
+
+    proc.ExecCmd.Start()
+    fmt.Println("WAITING for", proc.Name)
+
+    fmt.Println("SENDING READY on channel")
+    proc.Ready<- "ready"
+    proc.ExecCmd.Wait()
+    fmt.Println("PROCESS", proc.Name, "EXITED")
+  }
+}
+
 func main() {
   config.Load()
 
@@ -33,34 +61,21 @@ func main() {
     fmt.Println("PROCESS:", name)
     wg.Add(1)
 
-    go func() {
-      defer wg.Done()
+    proc.Ready = make(chan string)
+    go LaunchProcess(&proc, wg)
 
+    go func() {
       for {
-        fmt.Println("STARTING", name)
-        cmd := exec.Command(proc.Command, proc.Args...)
-        if errors.Is(cmd.Err, exec.ErrDot) {
-          cmd.Err = nil
-        }
-
-        stderr, err := cmd.StderrPipe();
-        LaunchLogger(stderr, os.Stdout, err)
-
-        stdout, err := cmd.StdoutPipe();
-        LaunchLogger(stdout, os.Stdout, err)
-
-        cmd.Run()
-        fmt.Println("WAITING for", name)
-
-        go func() {
-          fmt.Println("killer runs")
-          time.Sleep(4 * time.Second)
-          fmt.Println("!!!!!!!!!!!!!!!!!!! TIME TO DIE!!!!!")
-          cmd.Process.Signal(os.Interrupt)
-        }()
-
-        cmd.Wait()
-        fmt.Println("PROC", name, "EXITED SEND QUIT")
+        fmt.Println("!!!!!!!!!!!!!!!!!!!!!!!!!! killer runs")
+        is_ready := <-proc.Ready
+
+        fmt.Println("is_ready returned", is_ready)
+        sleep_for := rand.Int() % 10 + 1
+        time.Sleep(time.Duration(sleep_for) * time.Second)
+        fmt.Println("!!!!!!!!!!!!!!!!!!! TIME TO DIE!!!!!")
+
+        err := proc.ExecCmd.Process.Kill()
+        if err != nil { log.Printf("killer says: %v", err) }
       }
     }()
   }

tools/cmd/tester/main.go

@@ -7,11 +7,12 @@ import (
   "sync"
 )
 
-func Worker(name string, done chan<- int, stop <-chan int) {
-  for i := 0; i < 10; i++ {
+func Worker(name string, count int, done chan<- int, stop <-chan int) {
+  for i := 0; i < count; i++ {
     select {
     case <-stop:
       fmt.Println("Worker stopped:", name)
+      done<- 1
       return
     default:
       time.Sleep(1 * time.Second)
@@ -26,15 +27,14 @@ func Supervisor(id int, count int) {
   stop := make(chan int)
   var wg sync.WaitGroup
 
-  for i := 0; i < count; i++ {
+  for i := 0; i < 5; i++ {
     wg.Add(1)
     go func() {
       defer wg.Done()
 
       for {
         workerDone := make(chan int)
-        go Worker(fmt.Sprintf("%d:%d", id, i), workerDone, stop)
-
+        go Worker(fmt.Sprintf("%d:%d", id, i), count, workerDone, stop)
 
         select {
         case <-workerDone:
@@ -48,11 +48,13 @@ func Supervisor(id int, count int) {
     }()
   }
 
+  /*
   go func() {
     // test shutdown
     time.Sleep(10000 * time.Millisecond)
     close(stop)
   }()
+  */
 
   wg.Wait()
 }