Handle lack of /dev/tty

2 files changed, 20 insertions, 11 deletions

diff --git a/NEWS b/NEWS
index c6f5ddc..1ab3c35 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,12 @@
 NEWS file for ttystatus
 =======================
 
+Version 0.24.1, released 2015-10-01
+---------------------------------
+
+* Fix handling the case of the process not having a terminal to talk
+  to. Reported by Juergen Nickelsen.
+
 Version 0.24, released 2015-09-30
 ---------------------------------
 
diff --git a/ttystatus/tty.py b/ttystatus/tty.py
index 094cee9..f37b825 100644
--- a/ttystatus/tty.py
+++ b/ttystatus/tty.py
@@ -53,12 +53,14 @@ class PhysicalTerminal(object):
 
         width = 80
 
-        try:
-            s = struct.pack('HHHH', 0, 0, 0, 0)
-            x = fcntl.ioctl(self._terminal.fileno(), termios.TIOCGWINSZ, s)
-            width = struct.unpack('HHHH', x)[1]
-        except IOError:
-            pass
+        if self._terminal is not None:
+            try:
+                s = struct.pack('HHHH', 0, 0, 0, 0)
+                x = fcntl.ioctl(
+                    self._terminal.fileno(), termios.TIOCGWINSZ, s)
+                width = struct.unpack('HHHH', x)[1]
+            except IOError:
+                pass
 
         return width
 
@@ -69,8 +71,9 @@ class PhysicalTerminal(object):
 
         '''
 
-        try:
-            self._terminal.write(raw_data)
-            self._terminal.flush()
-        except IOError:
-            pass
+        if self._terminal is not None:
+            try:
+                self._terminal.write(raw_data)
+                self._terminal.flush()
+            except IOError:
+                pass