diff --git a/src/app/cli/include-cli_simple_launcher.php b/src/app/cli/include-launcher.php
similarity index 83%
rename from src/app/cli/include-cli_simple_launcher.php
rename to src/app/cli/include-launcher.php
index f836351..7a79024 100644
--- a/src/app/cli/include-cli_simple_launcher.php
+++ b/src/app/cli/include-launcher.php
@@ -1,5 +1,5 @@
 <?php
-# script à inclure pour implémenter _cli_simple_launcher.php
+# script à inclure pour implémenter _launcher.php
 # les constantes suivantes doivent être définies AVANT de chager ce script:
 # - NULIB_APP_app_params : paramètres du projet
 
@@ -7,7 +7,10 @@ use nur\sery\os\path;
 use nur\sery\wip\app\app2;
 
 if ($argc <= 1) die("invalid arguments");
-app2::init(NULIB_APP_app_params);
+app2::init([
+  "projdir" => __DIR__ . '/..',
+  "appcode" => \app\config\bootstrap::APPCODE,
+]);
 $app = $argv[1];
 if (class_exists($app)) {
   # la configuration est celle actuellement chargée
diff --git a/src/app/cli/template-bg-launcher.php b/src/app/cli/template-bg-launcher.php
new file mode 100755
index 0000000..bf4000a
--- /dev/null
+++ b/src/app/cli/template-bg-launcher.php
@@ -0,0 +1,19 @@
+#!/usr/bin/php
+<?php
+require __DIR__.'/../vendor/autoload.php';
+# Lancer une application en tâche de fond
+
+# TODO Faire une copie de ce script dans un répertoire de l'application web
+# (par défaut c'est le répertoire bin/) et modifier les paramètres si nécessaire
+
+use nur\sery\tools\BgLauncherApp;
+use nur\sery\wip\app\app2;
+
+# chemin vers le lanceur PHP
+const NULIB_APP_app_launcher = __DIR__.'/../_cli/_launcher.php';
+
+app2::init([
+  "projdir" => __DIR__ . '/..',
+  "appcode" => \app\config\bootstrap::APPCODE,
+]);
+BgLauncherApp::run();
diff --git a/src/app/cli/template-cli_simple_wrapper.sh b/src/app/cli/template-wrapper.sh
similarity index 92%
rename from src/app/cli/template-cli_simple_wrapper.sh
rename to src/app/cli/template-wrapper.sh
index 5bbee98..9c92553 100755
--- a/src/app/cli/template-cli_simple_wrapper.sh
+++ b/src/app/cli/template-wrapper.sh
@@ -2,7 +2,7 @@
 # -*- coding: utf-8 mode: sh -*- vim:sw=4:sts=4:et:ai:si:sta:fenc=utf-8
 # s'assurer que le script PHP est lancé avec l'utilisateur www-data
 
-# Faire une copie de ce script dans un répertoire de l'application web
+# TODO Faire une copie de ce script dans un répertoire de l'application web
 # (par défaut c'est le répertoire _cli/) et paramétrer les variables suivantes:
 # ce sont tous des chemins relatif au répertoire qui contient ce script
 
@@ -10,7 +10,7 @@
 PROJPATH=..
 
 # Chemin relatif vers le lanceur PHP
-LAUNCHERPATH=_cli_simple_launcher.php
+LAUNCHERPATH=_launcher.php
 
 # Chemin relatif des scripts PHP wrappés
 WRAPPEDPATH=
diff --git a/src/app/launcher.php b/src/app/launcher.php
index c3d69cf..b85530e 100644
--- a/src/app/launcher.php
+++ b/src/app/launcher.php
@@ -10,6 +10,7 @@ use nur\sery\StateException;
 use nur\sery\str;
 use nur\sery\wip\app\app;
 
+#XXX sera obsolète quand cli\bg_launcher sera mis en prod
 class launcher {
   /**
    * transformer une liste d'argument de la forme
diff --git a/src/tools/BgLauncherApp.php b/src/tools/BgLauncherApp.php
index f3bf360..b689824 100644
--- a/src/tools/BgLauncherApp.php
+++ b/src/tools/BgLauncherApp.php
@@ -36,7 +36,7 @@ class BgLauncherApp extends Application {
 
   static function show_infos(RunFile $runfile, ?int $level=null): void {
     msg::print($runfile->getDesc(), $level);
-    msg::print(yaml::with(["data" => $runfile->read()]), -1);
+    msg::print(yaml::with(["data" => $runfile->read()]), ($level ?? 0) - 1);
   }
 
   function main() {
@@ -60,7 +60,7 @@ class BgLauncherApp extends Application {
     switch ($this->action) {
     case self::ACTION_START:
       $appClass::_manage_runfile(count($args), $args, $runfile);
-      if ($runfile->warnIfLocked()) return;
+      if ($runfile->warnIfLocked()) self::exit(app2::EC_LOCKED);
       array_splice($args, 0, 0, [
         PHP_BINARY,
         path::abspath(NULIB_APP_app_launcher),
@@ -70,7 +70,7 @@ class BgLauncherApp extends Application {
       break;
     case self::ACTION_STOP:
       bg_launcher::_stop($runfile);
-      self::show_infos($runfile);
+      self::show_infos($runfile, -1);
       break;
     case self::ACTION_INFOS:
       self::show_infos($runfile);
diff --git a/src/tools/SteamTrainApp.php b/src/tools/SteamTrainApp.php
index 20725a1..fe00715 100644
--- a/src/tools/SteamTrainApp.php
+++ b/src/tools/SteamTrainApp.php
@@ -21,14 +21,14 @@ EOT,
     ["-c", "--count", "args" => 1,
       "help" => "spécifier le nombre d'étapes",
     ],
-    ["-s", "--install-signal-handler", "value" => true,
-      "help" => "installer un gestionnaire de signaux",
+    ["-n", "--no-install-signal-handler", "value" => false,
+      "help" => "ne pas installer le gestionnaire de signaux",
     ],
   ];
 
   protected $count = 100;
 
-  protected bool $installSignalHandler = false;
+  protected bool $installSignalHandler = true;
 
   function main() {
     if ($this->installSignalHandler) app2::install_signal_handler();
diff --git a/wip/app/RunFile.php b/wip/app/RunFile.php
index b429d63..81550ba 100644
--- a/wip/app/RunFile.php
+++ b/wip/app/RunFile.php
@@ -5,6 +5,7 @@ use nur\sery\A;
 use nur\sery\cl;
 use nur\sery\file\SharedFile;
 use nur\sery\os\path;
+use nur\sery\os\sh;
 use nur\sery\output\msg;
 use nur\sery\php\time\DateTime;
 use nur\sery\php\time\Elapsed;
@@ -70,6 +71,16 @@ class RunFile {
     ];
   }
 
+  function reset(bool $delete=false) {
+    $file = $this->file;
+    if ($delete) {
+      $file->close();
+      unlink($file->getFile());
+    } else {
+      $file->ftruncate();
+    }
+  }
+
   function read(): array {
     $data = $this->file->unserialize();
     if (!is_array($data)) $data = $this->initData();
@@ -274,6 +285,59 @@ class RunFile {
     });
   }
 
+  private static function kill(int $pid, int $signal, ?string &$reason=null): bool {
+    if (!posix_kill($pid, $signal)) {
+      switch (posix_get_last_error()) {
+      case PCNTL_ESRCH:
+        $reason = "process inexistant";
+        break;
+      case PCNTL_EPERM:
+        $reason = "process non accessible";
+        break;
+      case PCNTL_EINVAL:
+        $reason = "signal invalide";
+        break;
+      }
+      return false;
+    }
+    return true;
+  }
+
+  function wfKill(?string &$reason=null): bool {
+    $data = $this->read();
+    $pid = $this->_getCid($data);
+    $stopped = false;
+    $timeout = 10;
+    $delay = 300000;
+    while (--$timeout >= 0) {
+      if (!self::kill($pid, SIGTERM, $reason)) return false;
+      usleep($delay);
+      $delay = 1000000; // attendre 1 seconde à partir de la deuxième fois
+      if (!$this->_isRunning($data)) {
+        $stopped = true;
+        break;
+      }
+    }
+    if (!$stopped) {
+      $timeout = 3;
+      $delay = 300000;
+      while (--$timeout >= 0) {
+        if (!self::kill($pid, SIGKILL, $reason)) return false;
+        usleep($delay);
+        $delay = 1000000; // attendre 1 seconde à partir de la deuxième fois
+        if (!$this->_isRunning($data)) {
+          $stopped = true;
+          break;
+        }
+      }
+    }
+    if ($stopped) {
+      sh::_waitpid($pid, $exitcode);
+      $this->wfReaped($exitcode);
+    }
+    return $stopped;
+  }
+
   /**
    * vérifier si on est dans le cas où la tâche devrait tourner mais en réalité
    * ce n'est pas le cas
diff --git a/wip/app/cli/Application.php b/wip/app/cli/Application.php
index 6851ef7..4fb105c 100644
--- a/wip/app/cli/Application.php
+++ b/wip/app/cli/Application.php
@@ -14,6 +14,7 @@ use nur\sery\ValueException;
 use nur\sery\wip\app\app2;
 use nur\sery\wip\app\RunFile;
 use nur\sery\wip\web\content\v;
+use nur\yaml;
 
 /**
  * Class Application: application de base
@@ -82,11 +83,21 @@ abstract class Application {
   /** @var bool faut-il installer le gestionnaire de signaux? */
   const INSTALL_SIGNAL_HANDLER = false;
 
+  private static function _error(string $message, int $ec=1): int {
+    fwrite(STDERR, "ERROR: $message\n");
+    return $ec;
+  }
+
   static function _manage_runfile(int $argc, array $argv, RunFile $runfile): void {
     if ($argc <= 1 || $argv[1] !== "//") return;
     array_splice($argv, 1, 1);
     $ec = 0;
     switch ($argv[1] ?? "infos") {
+    case "kill":
+    case "k":
+      if ($runfile->isRunning()) $runfile->wfKill();
+      else $ec = self::_error("not running");
+      break;
     case "release-lock":
     case "release":
     case "rl":
@@ -104,9 +115,17 @@ abstract class Application {
         $ec = 1;
       }
       break;
+    case "dump":
+    case "d":
+      yaml::dump($runfile->read());
+      break;
+    case "reset":
+    case "z":
+      if (!$runfile->isRunning()) $runfile->reset();
+      else $ec = self::_error("cannot reset while running");
+      break;
     default:
-      fwrite(STDERR, "$argv[1]: unexpected command\n");
-      $ec = app2::EC_BAD_COMMAND;
+      $ec = self::_error("$argv[1]: unexpected command", app2::EC_BAD_COMMAND);
     }
     exit($ec);
   }
diff --git a/wip/app/cli/bg_launcher.php b/wip/app/cli/bg_launcher.php
index c0148a9..3948e99 100644
--- a/wip/app/cli/bg_launcher.php
+++ b/wip/app/cli/bg_launcher.php
@@ -32,66 +32,16 @@ class bg_launcher {
     }
   }
 
-  private static function kill(int $pid, int $signal): bool {
-    if (!posix_kill($pid, $signal)) {
-      switch (posix_get_last_error()) {
-      case PCNTL_ESRCH:
-        msg::afailure("process inexistant");
-        break;
-      case PCNTL_EPERM:
-        msg::afailure("process non accessible");
-        break;
-      case PCNTL_EINVAL:
-        msg::afailure("signal invalide");
-        break;
-      }
-      return false;
-    }
-    return true;
-  }
-
   static function _stop(Runfile $runfile): bool {
     $data = $runfile->read();
     $pid = $runfile->_getCid($data);
-    $stopped = false;
-    msg::action("term $pid");
-    $timeout = 10;
-    $delay = 300000;
-    while (--$timeout >= 0) {
-      if (!self::kill($pid, SIGTERM)) {
-        msg::afailure();
-        return false;
-      }
-      usleep($delay);
-      $delay = 1000000; // attendre 1 seconde à partir de la deuxième fois
-      if (!$runfile->_isRunning($data)) {
-        msg::asuccess();
-        $stopped = true;
-        break;
-      }
+    msg::action("stop $pid");
+    if ($runfile->wfKill($reason)) {
+      msg::asuccess();
+      return true;
+    } else {
+      msg::afailure($reason);
+      return false;
     }
-    if (!$stopped) {
-      msg::action("kill $pid");
-      $timeout = 3;
-      $delay = 300000;
-      while (--$timeout >= 0) {
-        if (!self::kill($pid, SIGKILL)) {
-          msg::afailure();
-          return false;
-        }
-        usleep($delay);
-        $delay = 1000000; // attendre 1 seconde à partir de la deuxième fois
-        if (!$runfile->_isRunning($data)) {
-          msg::asuccess();
-          $stopped = true;
-          break;
-        }
-      }
-    }
-    if ($stopped) {
-      sh::_waitpid($pid, $exitcode);
-      $runfile->wfReaped($exitcode);
-    }
-    return $stopped;
   }
 }