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=-14.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 65EB0C04AB4 for ; Fri, 17 May 2019 19:39:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3775E217D9 for ; Fri, 17 May 2019 19:39:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558121981; bh=AOPLlfTF5bFrJs/B1xmT1jKuM+zLXIf7IqkNNlNJg5U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=xTbKi4FWStqE+G2Xxc4ta2i3nBt5BdKLQpTG1EdcRpvrhYz4YS8YwXMxOuMLSydrY 73LpKYYmZZD6l/5ntn/gahHykuHwsj88GtkYlMHE+8nIxfP0BfVpenB3qZ6Ad/UHt3 iQL+HYy6pM+fm47gaNz+I8UOhG3hMTNGip1idOpk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729848AbfEQTjg (ORCPT ); Fri, 17 May 2019 15:39:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:55884 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729566AbfEQTjg (ORCPT ); Fri, 17 May 2019 15:39:36 -0400 Received: from quaco.ghostprotocols.net (unknown [190.15.121.82]) (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 47C6221744; Fri, 17 May 2019 19:39:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558121975; bh=AOPLlfTF5bFrJs/B1xmT1jKuM+zLXIf7IqkNNlNJg5U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AQVpjBZqPaO866hvWATS3r4bVLbi46l3P5oX9QplJosTPjcCqkCrAmhnepORvcbMs reMyAW8lni/4L3cDkird7kOGtwOfVLISwufdGYIq+iHwBDWT+w2NTQE+V2/EbOJ0G9 6qljHZ2fFgBnsi4sB1ewUwylDXNdTCpX/xyjKXBA= From: Arnaldo Carvalho de Melo To: Ingo Molnar , Thomas Gleixner Cc: Jiri Olsa , Namhyung Kim , Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Tzvetomir Stoyanov , Andrew Morton , Jiri Olsa , linux-trace-devel@vger.kernel.org, Steven Rostedt , Arnaldo Carvalho de Melo Subject: [PATCH 44/73] tools lib traceevent: Man page for tep_parse_header_page() Date: Fri, 17 May 2019 16:35:42 -0300 Message-Id: <20190517193611.4974-45-acme@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190517193611.4974-1-acme@kernel.org> References: <20190517193611.4974-1-acme@kernel.org> 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 From: Tzvetomir Stoyanov Create man page for tep_parse_header_page() libtraceevent API. Signed-off-by: Tzvetomir Stoyanov Cc: Andrew Morton Cc: Jiri Olsa Cc: Namhyung Kim Cc: linux-trace-devel@vger.kernel.org Link: http://lore.kernel.org/linux-trace-devel/20190503091119.23399-25-tstoyanov@vmware.com Link: http://lkml.kernel.org/r/20190510200110.093108279@goodmis.org Signed-off-by: Steven Rostedt (VMware) Signed-off-by: Arnaldo Carvalho de Melo --- .../libtraceevent-parse_head.txt | 82 +++++++++++++++++++ 1 file changed, 82 insertions(+) create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-parse_head.txt diff --git a/tools/lib/traceevent/Documentation/libtraceevent-parse_head.txt b/tools/lib/traceevent/Documentation/libtraceevent-parse_head.txt new file mode 100644 index 000000000000..c90f16c7d8e6 --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-parse_head.txt @@ -0,0 +1,82 @@ +libtraceevent(3) +================ + +NAME +---- +tep_parse_header_page - Parses the data stored in the header page. + +SYNOPSIS +-------- +[verse] +-- +*#include * + +int *tep_parse_header_page*(struct tep_handle pass:[*]_tep_, char pass:[*]_buf_, unsigned long _size_, int _long_size_); +-- + +DESCRIPTION +----------- +The _tep_parse_header_page()_ function parses the header page data from _buf_, +and initializes the _tep_, trace event parser context, with it. The buffer +_buf_ is with _size_, and is supposed to be copied from +tracefs/events/header_page. + +Some old kernels do not have header page info, in this case the +_tep_parse_header_page()_ function can be called with _size_ equal to 0. The +_tep_ context is initialized with default values. The _long_size_ can be used in +this use case, to set the size of a long integer to be used. + +RETURN VALUE +------------ +The _tep_parse_header_page()_ function returns 0 in case of success, or -1 +in case of an error. + +EXAMPLE +------- +[source,c] +-- +#include +... +struct tep_handle *tep = tep_alloc(); +... +char *buf; +int size; +buf = read_file("/sys/kernel/tracing/events/header_page", &size); +if (tep_parse_header_page(tep, buf, size, sizeof(unsigned long)) != 0) { + /* Failed to parse the header page */ +} +... +-- + +FILES +----- +[verse] +-- +*event-parse.h* + Header file to include in order to have access to the library APIs. +*-ltraceevent* + Linker switch to add when building a program that uses the library. +-- + +SEE ALSO +-------- +_libtraceevent(3)_, _trace-cmd(1)_ + +AUTHOR +------ +[verse] +-- +*Steven Rostedt* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +LICENSE +------- +libtraceevent is Free Software licensed under the GNU LGPL 2.1 + +RESOURCES +--------- +https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git -- 2.20.1