From patchwork Tue Nov 27 15:43:03 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tzvetomir Stoyanov X-Patchwork-Id: 10759983 Return-Path: Received: from mail-eopbgr700081.outbound.protection.outlook.com ([40.107.70.81]:24265 "EHLO NAM04-SN1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726381AbeK1CmI (ORCPT ); Tue, 27 Nov 2018 21:42:08 -0500 From: Tzvetomir Stoyanov To: "rostedt@goodmis.org" CC: "linux-trace-devel@vger.kernel.org" Subject: [PATCH v3 43/46] tools/lib/traceevent: Man pages for trace_seq_do_fprintf() and trace_seq_do_printf() Date: Tue, 27 Nov 2018 15:43:03 +0000 Message-ID: <20181127154153.11315-44-tstoyanov@vmware.com> References: <20181127154153.11315-1-tstoyanov@vmware.com> In-Reply-To: <20181127154153.11315-1-tstoyanov@vmware.com> Content-Language: en-US MIME-Version: 1.0 Sender: linux-trace-devel-owner@vger.kernel.org List-ID: Content-Length: 2873 Create man pages for trace_seq_do_fprintf() and trace_seq_do_printf() as part of the libtraceevent APIs. Signed-off-by: Tzvetomir Stoyanov --- .../libtraceevent-tseq_doprint.txt | 89 +++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-tseq_doprint.txt diff --git a/tools/lib/traceevent/Documentation/libtraceevent-tseq_doprint.txt b/tools/lib/traceevent/Documentation/libtraceevent-tseq_doprint.txt new file mode 100644 index 000000000000..441afae8ca0c --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-tseq_doprint.txt @@ -0,0 +1,89 @@ +libtraceevent(3) +================ + +NAME +---- +trace_seq_do_fprintf,trace_seq_do_printf - Print the trace sequence buffer to a file. + +SYNOPSIS +-------- +[verse] +-- +*#include * +*#include * + +int *trace_seq_do_printf*(struct trace_seq pass:[*]_s_); +int *trace_seq_do_fprintf*(struct trace_seq pass:[*]_s_, FILE pass:[*]_fp_); +-- + +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_do_printf()_ function prints the buffer of trace sequence _s_ to +the standard output stdout. + +The _trace_seq_do_fprintf()_ function prints the buffer of trace sequence _s_ +to the given file _fp_. + +RETURN VALUE +------------ +Both _trace_seq_do_printf()_ and _trace_seq_do_fprintf()_ functions return the +number of printed characters, or -1 in case of an error. + +EXAMPLE +------- +[source,c] +-- +#include +#include +... +struct trace_seq seq; +trace_seq_init(&seq); +... +if (trace_seq_do_printf(&seq) < 0 ) [ + /* Failed to print the buffer of the trace sequence to the standard output */ +} +... +FILE *fp = fopen("trace.txt", "w"); +if (trace_seq_do_fprintf(&seq, fp) < 0 ) [ + /* Failed to print the buffer of the trace sequence to the trace.txt file */ +} +... +-- + +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