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=-6.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY,USER_AGENT_GIT autolearn=ham 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 D55ACC3A5A9 for ; Mon, 4 May 2020 08:07:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B389C21655 for ; Mon, 4 May 2020 08:07:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ay4MxUsF" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728117AbgEDIHB (ORCPT ); Mon, 4 May 2020 04:07:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48998 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1728037AbgEDIHB (ORCPT ); Mon, 4 May 2020 04:07:01 -0400 Received: from mail-lj1-x242.google.com (mail-lj1-x242.google.com [IPv6:2a00:1450:4864:20::242]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 559CDC061A0E for ; Mon, 4 May 2020 01:06:59 -0700 (PDT) Received: by mail-lj1-x242.google.com with SMTP id y4so8709994ljn.7 for ; Mon, 04 May 2020 01:06:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=54kqlyiEHU3saXdXJWDUYlIeqajHtDZEJ7PXfnW9Atc=; b=ay4MxUsFiXODjEngfiOuF3KAmq1m9pfhNBQ9z0Ljs0AqN7/FVtY4qNpT64JoUWsZ/h cNrbYpbvs8aBl2aTpCMbmdLZPHUv+HwlfH9UrwsJocVJkRKDaxHd8R+7cVDBAD4hNgOy 1+I1lEFaCltf+1Wc8GM83mOWOPOo3dZ64UZ9elcWuHGdQmQYfMsGuO3ZJHKZIbJViaP4 Y2p583Ry5d4j2xyI2O3EOJNQ8iPAjGTzakkhnGfesOU4ZPUrpKrHE3+6JhWHIr5SwE9n vVQzByQ25h4OkzMsQS4zYTzhUCQKZjCDI+b6zyNuiyy4RawlNTXKThRusj2H2uwOPwKx vu1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=54kqlyiEHU3saXdXJWDUYlIeqajHtDZEJ7PXfnW9Atc=; b=Ciod4wowNiugv/RSJXKXjZJEWNFmyc71Kvl3qFZqJ/b8Mm2/ZoQqi4iQdPxX0dkooS tA5sovfbbwFoomE/3p4LJ/Ft7Xxczp5+oWCcp7HqjNvfCl1eKJYxq36xDhxVzRMXeRqk vo+sJwBJNUYsKCd7Jh9FRJRN4C1AdcWqxa4sKToKCoiJE8jnUpR4Yxy5tW57PQ7JG/kE rW1sgwCS3p8LwvqNus3oyhr4gM41AyQg3vaqa0x8GA0B6oqLdbHhr+EGbh5CwwtjsHr8 G0hCCLn1g34wYhASRQkyews1iAodPM6In6qT0eSEl4JWqam+2BaGlzn7dB1OHdTda0Q7 53pQ== X-Gm-Message-State: AGi0PuZ8cCW73ubVXJTbTkQcM6boztSjDaHsbro88AdXkytECoRfoRMy YifP0l2e8FIxC010B/vDlHNGBEhm0Qg= X-Google-Smtp-Source: APiQypL71srQ6ip3ZeYTHiLS6/kcOs7y/xWrVUbDjmWqXHvg0aiagbaaAnTRs1dar3SZdWluGAJTCg== X-Received: by 2002:a2e:6a08:: with SMTP id f8mr10021904ljc.8.1588579617830; Mon, 04 May 2020 01:06:57 -0700 (PDT) Received: from oberon.zico.biz ([83.222.187.186]) by smtp.gmail.com with ESMTPSA id r20sm7580115ljj.44.2020.05.04.01.06.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 04 May 2020 01:06:57 -0700 (PDT) From: "Tzvetomir Stoyanov (VMware)" To: rostedt@goodmis.org Cc: linux-trace-devel@vger.kernel.org Subject: [PATCH] trace-cmd: Add option "-s" to list subcommand, to display available event systems Date: Mon, 4 May 2020 11:06:55 +0300 Message-Id: <20200504080655.115448-1-tz.stoyanov@gmail.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-trace-devel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-devel@vger.kernel.org Extend "trace-cmd list" command to show available event systems. Printing the systems is triggered by the "-s" flag, or if no flags are specified (part of "show all" output). Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=207485 Reported-by: Steven Rostedt (VMware) Signed-off-by: Tzvetomir Stoyanov (VMware) --- tracecmd/trace-list.c | 47 ++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 46 insertions(+), 1 deletion(-) diff --git a/tracecmd/trace-list.c b/tracecmd/trace-list.c index f046304d..c9abcd73 100644 --- a/tracecmd/trace-list.c +++ b/tracecmd/trace-list.c @@ -5,6 +5,7 @@ */ #include +#include #include "tracefs.h" #include "trace-local.h" @@ -306,6 +307,42 @@ static void show_buffers(void) } +static void show_systems(void) +{ + struct dirent *dent; + char *path; + DIR *dir; + + path = tracefs_get_tracing_file("events"); + dir = opendir(path); + + if (!dir) + die("Can not read events directory"); + + while ((dent = readdir(dir))) { + const char *name = dent->d_name; + struct stat st; + char *spath; + int ret; + + if (strcmp(name, ".") == 0 || + strcmp(name, "..") == 0) + continue; + + if (asprintf(&spath, "%s/%s", path, name) < 0) + continue; + ret = stat(spath, &st); + if (!ret && S_ISDIR(st.st_mode)) + printf("%s\n", name); + + free(spath); + } + + printf("\n"); + closedir(dir); + tracefs_put_tracing_file(path); +} + static void show_plugin_options(void) { struct tep_handle *pevent; @@ -366,6 +403,7 @@ void trace_list(int argc, char **argv) int plug = 0; int plug_op = 0; int flags = 0; + int systems = 0; int show_all = 1; int i; const char *arg; @@ -427,6 +465,10 @@ void trace_list(int argc, char **argv) funcre = arg; show_all = 0; break; + case 's': + systems = 1; + show_all = 0; + break; case '-': if (strcmp(argv[i], "--debug") == 0) { tracecmd_set_debug(true); @@ -465,8 +507,11 @@ void trace_list(int argc, char **argv) if (clocks) show_clocks(); - + if (systems) + show_systems(); if (show_all) { + printf("event systems:\n"); + show_systems(); printf("events:\n"); show_events(NULL, 0); printf("\ntracers:\n"); -- 2.26.2