From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7C519C19F35 for ; Tue, 10 Aug 2021 20:48:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5A939610A3 for ; Tue, 10 Aug 2021 20:48:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233271AbhHJUst (ORCPT ); Tue, 10 Aug 2021 16:48:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:44240 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230181AbhHJUsr (ORCPT ); Tue, 10 Aug 2021 16:48:47 -0400 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4471361058; Tue, 10 Aug 2021 20:48:25 +0000 (UTC) Received: from rostedt by gandalf.local.home with local (Exim 4.94.2) (envelope-from ) id 1mDYfg-003hAH-6e; Tue, 10 Aug 2021 16:48:24 -0400 From: Steven Rostedt To: linux-trace-devel@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Tom Zanussi , Daniel Bristot de Oliveira , Masami Hiramatsu , Namhyung Kim , linux-rt-users , Clark Williams , "Steven Rostedt (VMware)" Subject: [PATCH 5/9] libtracefs: Add API tracefs_list_dup() Date: Tue, 10 Aug 2021 16:48:14 -0400 Message-Id: <20210810204818.880714-6-rostedt@goodmis.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210810204818.880714-1-rostedt@goodmis.org> References: <20210810204818.880714-1-rostedt@goodmis.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Steven Rostedt (VMware)" Add an API tracefs_list_dup() that will duplicate an existing list. Signed-off-by: Steven Rostedt (VMware) --- include/tracefs.h | 1 + src/tracefs-utils.c | 26 ++++++++++++++++++++++++++ 2 files changed, 27 insertions(+) diff --git a/include/tracefs.h b/include/tracefs.h index f1e4ffa0d65f..6fb66c44afc7 100644 --- a/include/tracefs.h +++ b/include/tracefs.h @@ -67,6 +67,7 @@ void tracefs_list_free(char **list); char **tracefs_list_add(char **list, const char *string); int tracefs_list_size(char **list); int tracefs_list_pop(char **list); +char **tracefs_list_dup(char **list); /** * tracefs_trace_on_get_fd - Get a file descriptor of "tracing_on" in given instance diff --git a/src/tracefs-utils.c b/src/tracefs-utils.c index 63bb413298fe..8c92d6c54ab1 100644 --- a/src/tracefs-utils.c +++ b/src/tracefs-utils.c @@ -489,3 +489,29 @@ int tracefs_list_size(char **list) list--; return (int)*(unsigned long *)list; } + +/** + * tracefs_list_dup - create a duplicate list + * @list: The list to duplicate + * + * Allocates a new list that can be modified and freed separately. + * + * Returns a new allocated list that must be freed with + * tracefs_list_free(), or NULL on error. + */ +char **tracefs_list_dup(char **list) +{ + char **new = NULL; + char **tmp; + int i; + + for (i = 0; list[i]; i++) { + tmp = tracefs_list_add(new, list[i]); + if (!tmp) { + free(new); + return NULL; + } + new = tmp; + } + return new; +} -- 2.30.2