fix #925: [OSX/BSD/SUNOS] ZombieProcess may be erroneously raised for…

… PID 0

HISTORY.rst

@@ -41,6 +41,7 @@ Bug tracker at https://github.com/giampaolo/psutil/issues
   original one, hopefully helping the gc to free resources.
 - #923: [OSX] free memory is wrong (does not match vm_stat command).
 - #924: [OSX] Process.exe() for PID 0 erroneously raise ZombieProcess.
+- #925: [OSX/BSD/SUNOS] ZombieProcess may be erroneously raised for PID 0.
 
 
 4.3.1 - 2016-09-01

psutil/_psbsd.py

@@ -411,6 +411,11 @@ def wrapper(self, *args, **kwargs):
         try:
             return fun(self, *args, **kwargs)
         except OSError as err:
+            if self.pid == 0:
+                if 0 in pids():
+                    raise AccessDenied(self.pid, self._name)
+                else:
+                    raise
             if err.errno == errno.ESRCH:
                 if not pid_exists(self.pid):
                     raise NoSuchProcess(self.pid, self._name)

psutil/_psosx.py

@@ -243,6 +243,11 @@ def wrapper(self, *args, **kwargs):
         try:
             return fun(self, *args, **kwargs)
         except OSError as err:
+            if self.pid == 0:
+                if 0 in pids():
+                    raise AccessDenied(self.pid, self._name)
+                else:
+                    raise
             if err.errno == errno.ESRCH:
                 if not pid_exists(self.pid):
                     raise NoSuchProcess(self.pid, self._name)

psutil/_pssunos.py

@@ -323,6 +323,11 @@ def wrapper(self, *args, **kwargs):
         try:
             return fun(self, *args, **kwargs)
         except EnvironmentError as err:
+            if self.pid == 0:
+                if 0 in pids():
+                    raise AccessDenied(self.pid, self._name)
+                else:
+                    raise
             # ENOENT (no such file or directory) gets raised on open().
             # ESRCH (no such process) can get raised on read() if
             # process is gone in meantime.

psutil/tests/test_process.py

@@ -1427,6 +1427,12 @@ def test_pid_0(self):
                 elif name == "name":
                     assert name, name
 
+        if hasattr(p, 'rlimit'):
+            try:
+                p.rlimit(psutil.RLIMIT_FSIZE)
+            except psutil.AccessDenied:
+                pass
+
         p.as_dict()
 
         if not OPENBSD: