Handle an invalid cwd properly.

Fixes #370.

qutebrowser/app.py

@@ -598,9 +598,9 @@ class Application(QApplication):
         log.destroy.debug("sys.path: {}".format(sys.path))
         log.destroy.debug("sys.argv: {}".format(sys.argv))
         log.destroy.debug("frozen: {}".format(hasattr(sys, 'frozen')))
-        args, cwd = self._get_restart_args(pages)
         # Open a new process and immediately shutdown the existing one
         try:
+            args, cwd = self._get_restart_args(pages)
             if cwd is None:
                 subprocess.Popen(args)
             else:

qutebrowser/misc/ipc.py

@@ -152,11 +152,11 @@ class IPCServer(QObject):
                 return
             try:
                 args = json_data['args']
-                cwd = json_data['cwd']
             except KeyError:
                 log.ipc.error("Ignoring invalid IPC data.")
-                log.ipc.debug("no args/cwd: {}".format(decoded.strip()))
+                log.ipc.debug("no args: {}".format(decoded.strip()))
                 return
+            cwd = json_data.get('cwd', None)
             app = objreg.get('app')
             app.process_args(args, via_ipc=True, cwd=cwd)
 
@@ -211,7 +211,13 @@ def send_to_running_instance(cmdlist):
     connected = socket.waitForConnected(100)
     if connected:
         log.ipc.info("Opening in existing instance")
-        json_data = {'args': cmdlist, 'cwd': os.getcwd()}
+        json_data = {'args': cmdlist}
+        try:
+            cwd = os.getcwd()
+        except OSError:
+            pass
+        else:
+            json_data['cwd'] = cwd
         line = json.dumps(json_data) + '\n'
         data = line.encode('utf-8')
         log.ipc.debug("Writing: {}".format(data))

qutebrowser/utils/urlutils.py

@@ -136,9 +136,12 @@ def fuzzy_url(urlstr, cwd=None):
     if cwd:
         path = os.path.join(cwd, os.path.expanduser(urlstr))
     else:
+        try:
             path = os.path.abspath(os.path.expanduser(urlstr))
+        except OSError:
+            path = None
     stripped = urlstr.strip()
-    if os.path.exists(path):
+    if path is not None and os.path.exists(path):
         log.url.debug("URL is a local file")
         url = QUrl.fromLocalFile(path)
     elif is_url(stripped):

qutebrowser/utils/version.py

@@ -64,7 +64,7 @@ def _git_str():
         try:
             gitpath = os.path.join(os.path.dirname(os.path.realpath(__file__)),
                                    os.path.pardir, os.path.pardir)
-        except NameError:
+        except (NameError, OSError):
             log.misc.exception("Error while getting git path")
         else:
             commit = _git_str_subprocess(gitpath)