safely save and restore signal handler

calls to `signal.signal` not on the main thread would raise a
`ValueError`. Resolving by catching that exception and continuing

1 files changed, 8 insertions, 2 deletions

diff --git a/fuse.py b/fuse.py
index e4b79e2..7a03d61 100644
--- a/fuse.py
+++ b/fuse.py
@@ -387,12 +387,18 @@ class FUSE(object):
                 op = partial(self._wrapper, getattr(self, name))
                 setattr(fuse_ops, name, prototype(op))
 
-        old_handler = signal(SIGINT, SIG_DFL)
+        try:
+            old_handler = signal(SIGINT, SIG_DFL)
+        except ValueError:
+            old_handler = SIG_DFL
 
         err = _libfuse.fuse_main_real(len(args), argv, pointer(fuse_ops),
                                       sizeof(fuse_ops), None)
 
-        signal(SIGINT, old_handler)
+        try:
+            signal(SIGINT, old_handler)
+        except ValueError:
+            pass
 
         del self.operations     # Invoke the destructor
         if err: