- fread(data_buffer, 1, 18, data_file);
+ /* The code used to use this line, but it doesn't work in Cygwin.
+ *
+ * (void)fread(data_buffer, 1, 18, data_file);
+ *
+ * What's happening is that spool_mbox used to use an fread to jump over the
+ * file header. That fails under Cygwin because the header is locked, but
+ * doing an fseek succeeds. We have to output the leading newline
+ * explicitly, because the one in the file is parted of the locked area.
+ */
+
+ (void)fwrite("\n", 1, 1, mbox_file);
+ (void)fseek(data_file, SPOOL_DATA_START_OFFSET, SEEK_SET);