From patchwork Mon Nov 19 12:54:44 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tzvetomir Stoyanov X-Patchwork-Id: 10759811 Return-Path: Received: from mail-eopbgr790084.outbound.protection.outlook.com ([40.107.79.84]:44928 "EHLO NAM03-CO1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728872AbeKSXSt (ORCPT ); Mon, 19 Nov 2018 18:18:49 -0500 From: Tzvetomir Stoyanov To: "rostedt@goodmis.org" CC: "linux-trace-devel@vger.kernel.org" Subject: [PATCH 32/34] tools/lib/traceevent: Man pages for trace_seq_printf() and trace_seq_vprintf() Date: Mon, 19 Nov 2018 12:54:44 +0000 Message-ID: <20181119125357.19449-33-tstoyanov@vmware.com> References: <20181119125357.19449-1-tstoyanov@vmware.com> In-Reply-To: <20181119125357.19449-1-tstoyanov@vmware.com> Content-Language: en-US MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org List-ID: Content-Length: 2959 Create man pages for trace_seq_printf() and trace_seq_vprintf() as part of the libtraceevent APIs. Signed-off-by: Tzvetomir Stoyanov --- .../libtraceevent-tseq_print.txt | 95 +++++++++++++++++++ 1 file changed, 95 insertions(+) create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-tseq_print.txt diff --git a/tools/lib/traceevent/Documentation/libtraceevent-tseq_print.txt b/tools/lib/traceevent/Documentation/libtraceevent-tseq_print.txt new file mode 100644 index 000000000000..ae1aa44710e7 --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-tseq_print.txt @@ -0,0 +1,95 @@ +libtraceevent(3) +================ + +NAME +---- +trace_seq_printf,trace_seq_vprintf - Print formated string with arguments in a trace sequence. + +SYNOPSIS +-------- +[verse] +-- +*#include * +*#include * + +int *trace_seq_printf*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, _..._); +int *trace_seq_vprintf*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, va_list _args_); +-- + +DESCRIPTION +----------- +Trace sequences are used to allow a function to call several other functions +to create a string of data to use. + +The _trace_seq_printf()_ function puts a formated string _fmt _with +variable arguments _..._ in the trace sequence _s_. + +The _trace_seq_vprintf()_ function puts a formated string _fmt _with +list of arguments _args_ in the trace sequence _s_. + +RETURN VALUE +------------ + +Both _trace_seq_printf()_ and _trace_seq_vprintf()_ functions return non-zero +on success, or 0 in case of an error. + +EXAMPLE +------- +[source,c] +-- +#include +#include +... +struct trace_seq seq; +trace_seq_init(&seq); +... +if (trace_seq_printf(&seq, "example print %d", 10) == 0) { + /* Failed to print in the trace sequence */ +} +... +void my_print(char *format, ...) +{ + va_list ap; + va_start(ap, format); + if (trace_seq_printf(&seq, format, ap) == 0) { + /* Failed to print in the trace sequence */ + } + va_end(ap); +} +... +-- + +FILES +----- +[verse] +-- +*event-parse.h* + Header file to include in order to have access to the library APIs. +*trace-seq.h* + Header file to include in order to have access to trace sequences related 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