bugfix: error checking in e2lib.write_file()

Signed-off-by: Gordon Hecker <gh@emlix.com>

diff --git a/generic/e2lib.lua b/generic/e2lib.lua
index ef67d10f65ec6773a67edab0168e1e7c2eaa7871..48ac73add31adf70c1d74be21f2a2465d32fe72b 100644 (file)
--- a/generic/e2lib.lua
+++ b/generic/e2lib.lua
@@ -1791,13 +1791,14 @@ end
 -- @return bool
 -- @return nil, or an error string
 function e2lib.write_file(file, data)
-  local f = io.open(file, "w")
+  local f, msg = io.open(file, "w")
   if not f then
-    return false, "open failed"
+    return false, string.format("open failed: %s", msg)
   end
-  local rc = f:write(data)
+  local rc, msg = f:write(data)
   if not rc then
-    return false, "write failed"
+    f:close()
+    return false, string.format("write failed: %s", msg)
   end
   f:close()
   return true, nil