From: Calin Crisan <ccrisan@gmail.com>
Date: Sun, 29 Sep 2013 09:48:00 +0000 (+0300)
Subject: added motionctl code
X-Git-Url: http://www.vanbest.org/gitweb/?a=commitdiff_plain;h=2bebde8cfd2fff3eff76848aa49f3f184dd3053d;p=motioneye-debian

added motionctl code
---

diff --git a/.gitignore b/.gitignore
index 704a437..9f3f340 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 *.log
 *.pyc
 *.bak
+*.pid
 .project
 .pydevproject
 *.conf
diff --git a/motioneye.py b/motioneye.py
index f3414f2..f62efd4 100644
--- a/motioneye.py
+++ b/motioneye.py
@@ -25,6 +25,7 @@ def _configure_signals():
 
     signal.signal(signal.SIGINT, bye_handler)
     signal.signal(signal.SIGTERM, bye_handler)
+    signal.signal(signal.SIGCHLD, signal.SIG_IGN)
 
 
 def _configure_logging():
@@ -40,9 +41,9 @@ def _start_server():
 
 
 if __name__ == '__main__':
-    _configure_signals()
-    _configure_logging()
-    _start_server()
+#     _configure_signals()
+#     _configure_logging()
+#     _start_server()
     
 #     import config
 #     main_config = config.get_main()
@@ -52,3 +53,6 @@ if __name__ == '__main__':
 #     #config.set_camera(1, data)
 #     config.rem_camera(1)
     
+    import motionctl
+    
+    motionctl.start()
diff --git a/settings.py b/settings.py
index 6eeb272..4e348a6 100644
--- a/settings.py
+++ b/settings.py
@@ -5,8 +5,10 @@ import sys
 
 
 PROJECT_PATH = os.path.dirname(sys.argv[0])
-CONF_PATH = os.path.join(PROJECT_PATH, 'conf')
-RUN_PATH = PROJECT_PATH
+#CONF_PATH = os.path.join(PROJECT_PATH, 'conf')
+CONF_PATH = '/media/data/projects/motioneye/conf/'
+RUN_PATH = '/media/data/projects/motioneye/'
+#RUN_PATH = PROJECT_PATH
 
 DEBUG = True
 LOG_LEVEL = logging.DEBUG
diff --git a/src/motionctl.py b/src/motionctl.py
index 0ee23ec..507f584 100644
--- a/src/motionctl.py
+++ b/src/motionctl.py
@@ -1,19 +1,25 @@
 
+import errno
 import os.path
+import signal
 import subprocess
+import time
 
 import settings
 
 
 def find_program():
     try:
-        return subprocess.check_output('which motion', shell=True)
+        return subprocess.check_output('which motion', shell=True).strip()
     
     except subprocess.CalledProcessError: # not found
         return None
 
 
 def start():
+    if running():
+        raise Exception('motion is already running')
+
     program = find_program()
     if not program:
         raise Exception('motion executable could not be found')
@@ -23,18 +29,84 @@ def start():
     motion_pid_path = os.path.join(settings.RUN_PATH, 'motion.pid')
     
     args = [program,
-        '-c', motion_config_path,
-        '-n',
-        '-p', motion_pid_path]
-    
+            '-c', motion_config_path,
+            '-n']
+
     log_file = open(motion_log_path, 'w')
     
-    subprocess.Popen(args, stdout=log_file, stderr=log_file)
+    process = subprocess.Popen(args, stdout=log_file, stderr=log_file, close_fds=True,
+            cwd=settings.RUN_PATH)
+    
+    # wait 2 seconds to see that the process has successfully started
+    for i in xrange(20):  # @UnusedVariable
+        time.sleep(0.1)
+        exit_code = process.poll()
+        if exit_code is not None and exit_code != 0:
+            raise Exception('motion failed to start')
+
+    pid = process.pid
+    
+    # write the pid to file
+    with open(motion_pid_path, 'w') as f:
+        f.write(str(pid) + '\n')
 
 
 def stop():
-    pass
-
+    if not running():
+        raise Exception('motion is not running')
+    
+    pid = _get_pid()
+    if pid is not None:
+        try:
+            # send the TERM signal once
+            os.kill(pid, signal.SIGTERM)
+            
+            # wait 5 seconds for the process to exit
+            for i in xrange(50):  # @UnusedVariable
+                time.sleep(0.1)
+                os.kill(pid, 0)
+            
+            # send the KILL signal once
+            os.kill(pid, signal.SIGKILL)
+            
+            # wait 2 seconds for the process to exit
+            for i in xrange(20):  # @UnusedVariable
+                time.sleep(0.1)
+                os.kill(pid, 0)
+                
+            # the process still did not exit
+            raise Exception('could not terminate the motion process')
+        
+        except OSError as e:
+            if e.errno != errno.ESRCH:
+                raise
+    
 
 def running():
-    pass
+    pid = _get_pid()
+    if pid is None:
+        return False
+    
+    try:
+        os.kill(pid, 0)
+        
+        # the process is running
+        return True
+    
+    except OSError as e:
+        if e.errno != errno.ESRCH:
+            raise
+
+    return False
+
+
+def _get_pid():
+    motion_pid_path = os.path.join(settings.RUN_PATH, 'motion.pid')
+    
+    # read the pid from file
+    try:
+        with open(motion_pid_path, 'r') as f:
+            return int(f.readline().strip())
+        
+    except IOError, ValueError:
+        return None