struct child_process child_process;
        struct filter_params *params = (struct filter_params *)data;
        int write_err, status;
-       const char *argv[] = { "sh", "-c", params->cmd, NULL };
+       const char *argv[] = { params->cmd, NULL };
 
        memset(&child_process, 0, sizeof(child_process));
        child_process.argv = argv;
+       child_process.use_shell = 1;
        child_process.in = -1;
        child_process.out = fd;
 
 
        status = finish_command(&child_process);
        if (status)
-               error("external filter %s failed %d", params->cmd, -status);
+               error("external filter %s failed %d", params->cmd, status);
        return (write_err || status);
 }
 
        static struct git_attr *attr_filter;
 
        if (!attr_crlf) {
-               attr_crlf = git_attr("crlf", 4);
-               attr_ident = git_attr("ident", 5);
-               attr_filter = git_attr("filter", 6);
+               attr_crlf = git_attr("crlf");
+               attr_ident = git_attr("ident");
+               attr_filter = git_attr("filter");
                user_convert_tail = &user_convert;
                git_config(read_convert_config, NULL);
        }