fix pid 0 test

2 files changed, 10 insertions, 3 deletions

diff --git a/psutil/_psbsd.py b/psutil/_psbsd.py
index 3cd392a0..8b980b2d 100644
--- a/psutil/_psbsd.py
+++ b/psutil/_psbsd.py
@@ -348,6 +348,8 @@ class Process(object):
 
     @wrap_exceptions
     def cmdline(self):
+        if OPENBSD and self.pid == 0:
+            return None  # ...else it crashes
         return cext.proc_cmdline(self.pid)
 
     @wrap_exceptions
@@ -491,6 +493,8 @@ class Process(object):
             """Return process current working directory."""
             # sometimes we get an empty string, in which case we turn
             # it into None
+            if OPENBSD and self.pid == 0:
+                return None  # ...else raises EINVAL
             return cext.proc_cwd(self.pid) or None
 
         @wrap_exceptions
diff --git a/test/test_psutil.py b/test/test_psutil.py
index b79dc084..9ca4d175 100644
--- a/test/test_psutil.py
+++ b/test/test_psutil.py
@@ -2388,7 +2388,7 @@ class TestProcess(unittest.TestCase):
 
     def test_pid_0(self):
         # Process(0) is supposed to work on all platforms except Linux
-        if 0 not in psutil.pids():
+        if 0 not in psutil.pids() and not OPENBSD:
             self.assertRaises(psutil.NoSuchProcess, psutil.Process, 0)
             return
 
@@ -2429,8 +2429,11 @@ class TestProcess(unittest.TestCase):
         except psutil.AccessDenied:
             pass
 
-        self.assertIn(0, psutil.pids())
-        self.assertTrue(psutil.pid_exists(0))
+        p.as_dict()
+
+        if not OPENBSD:
+            self.assertIn(0, psutil.pids())
+            self.assertTrue(psutil.pid_exists(0))
 
     def test_Popen(self):
         # Popen class test