=== modified file 'mydumper.c'
--- mydumper.c	2011-05-25 12:05:42 +0000
+++ mydumper.c	2015-02-16 09:53:01 +0000
@@ -1162,11 +1162,11 @@
 
 	while (written < data->len) {
 		if (!compress_output)
-			r = write(fileno(file), data->str + written, data->len);
+			r = write(fileno(file), data->str + written, data->len - written);
 		else
-			r = gzwrite((gzFile)file, data->str + written, data->len);
+			r = gzwrite((gzFile)file, data->str + written, data->len - written);
 		
-		if (r < 0) {
+		if (r <= 0) {
 			g_critical("Couldn't write data to a file: %s", strerror(errno));
 			errors++;
 			return FALSE;