added error handling

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@8743 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/bin/keymap/Keymap.cpp

@@ -220,13 +220,18 @@ Keymap::Dump()
 }
 
 
-void
+status_t
 Keymap::LoadCurrent()
 {
-	key_map *keys;
+	key_map *keys = NULL;
 	get_key_map(&keys, &fChars);
+	if (!keys) {
+		fprintf(stderr, "error while getting current keymap!\n");
+		return B_ERROR;
+	}
 	memcpy(&fKeys, keys, sizeof(fKeys));
 	delete keys;
+	return B_OK;
 }
 
 /*

src/apps/bin/keymap/Keymap.h

@@ -23,7 +23,7 @@
 class Keymap 
 {
 public:
-	void LoadCurrent();
+	status_t LoadCurrent();
 	status_t Load(entry_ref &ref);
 	status_t Save(entry_ref &ref);
 	status_t LoadSource(FILE *f);

src/apps/bin/keymap/key_map.cpp

@@ -46,7 +46,8 @@ int main(int argc, char **argv)
 				break;
 			if (operation == 'd') {
 				Keymap keymap;
-				keymap.LoadCurrent();
+				if (keymap.LoadCurrent() != B_OK)
+					return 1;
 				keymap.Dump();
 				return 0;
 			} else if (operation == 'r') {