Make salt.utils.minion._check_cmdline work on OSes without /proc.

salt/utils/minion.py

@@ -17,6 +17,7 @@ def running(opts):
     '''
     Return the running jobs on this minion
     '''
+
     ret = []
     proc_dir = os.path.join(opts['cachedir'], 'proc')
     if not os.path.isdir(proc_dir):
@@ -110,13 +111,30 @@ def _read_proc_file(path, opts):
 
 def _check_cmdline(data):
     '''
-    Check the proc filesystem cmdline to see if this process is a salt process
+    In some cases where there are an insane number of processes being created
+    on a system a PID can get recycled or assigned to a non-Salt process.
+    This fn checks to make sure the PID we are checking on is actually
+    a Salt process.
+
+    For non-Linux systems with no procfs style /proc mounted
+    we punt and just return True (assuming that the data has a PID in it)
     '''
-    if salt.utils.is_windows():
-        return True
     pid = data.get('pid')
     if not pid:
         return False
+    if not os.path.isdir('/proc') or salt.utils.is_windows():
+        return True
+    # Some BSDs have a /proc dir, but procfs is not mounted there.  Since
+    # processes are represented by directories in /proc, if there are no
+    # dirs in proc, this is a non-procfs supporting OS.  In this case
+    # like the one above we just return True
+    dirs_in_proc = False
+    for dirpath, dirnames, files in os.walk('/proc'):
+        if dirnames:
+            dirs_in_proc = True
+            break
+    if not dirs_in_proc:
+        return True
     path = os.path.join('/proc/{0}/cmdline'.format(pid))
     if not os.path.isfile(path):
         return False