linux-kernel - [tip:perf/core] tools lib traceevent: Man page for tep

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Message-ID: <tip-c127ef56761e41ad3eb4cb6eaaf1805e04c9a46e@git.kernel.org>
Date:   Sat, 18 May 2019 02:05:48 -0700
From:   tip-bot for Tzvetomir Stoyanov <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     mingo@...nel.org, jolsa@...hat.com, acme@...hat.com,
        akpm@...ux-foundation.org, tstoyanov@...are.com,
        tglx@...utronix.de, hpa@...or.com, rostedt@...dmis.org,
        linux-kernel@...r.kernel.org, namhyung@...nel.org
Subject: [tip:perf/core] tools lib traceevent: Man page for tep_strerror()

Commit-ID:  c127ef56761e41ad3eb4cb6eaaf1805e04c9a46e
Gitweb:     https://git.kernel.org/tip/c127ef56761e41ad3eb4cb6eaaf1805e04c9a46e
Author:     Tzvetomir Stoyanov <tstoyanov@...are.com>
AuthorDate: Fri, 10 May 2019 15:56:16 -0400
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 15 May 2019 16:36:48 -0300

tools lib traceevent: Man page for tep_strerror()

Create man page for tep_strerror() libtraceevent API.

Signed-off-by: Tzvetomir Stoyanov <tstoyanov@...are.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: linux-trace-devel@...r.kernel.org
Link: http://lore.kernel.org/linux-trace-devel/20190503091119.23399-10-tstoyanov@vmware.com
Link: http://lkml.kernel.org/r/20190510200107.371692630@goodmis.org
[ Added "always" to state it doesn't matter if it is POSIX or GNU ]
Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 .../Documentation/libtraceevent-strerror.txt       | 85 ++++++++++++++++++++++
 1 file changed, 85 insertions(+)

diff --git a/tools/lib/traceevent/Documentation/libtraceevent-strerror.txt b/tools/lib/traceevent/Documentation/libtraceevent-strerror.txt
new file mode 100644
index 000000000000..ee4062a00c9f
--- /dev/null
+++ b/tools/lib/traceevent/Documentation/libtraceevent-strerror.txt
@@ -0,0 +1,85 @@
+libtraceevent(3)
+================
+
+NAME
+----
+tep_strerror - Returns a string describing regular errno and tep error number.
+
+SYNOPSIS
+--------
+[verse]
+--
+*#include <event-parse.h>*
+
+int *tep_strerror*(struct tep_handle pass:[*]_tep_, enum tep_errno _errnum_, char pass:[*]_buf_, size_t _buflen_);
+
+--
+DESCRIPTION
+-----------
+The _tep_strerror()_ function converts tep error number into a human
+readable string.
+The _tep_ argument is trace event parser context. The _errnum_ is a regular
+errno, defined in errno.h, or a tep error number. The string, describing this
+error number is copied in the _buf_ argument. The _buflen_ argument is
+the size of the _buf_.
+
+It as a thread safe wrapper around strerror_r(). The library function has two
+different behaviors - POSIX and GNU specific. The _tep_strerror()_ API always
+behaves as the POSIX version - the error string is copied in the user supplied
+buffer.
+
+RETURN VALUE
+------------
+The _tep_strerror()_ function returns 0, if a valid _errnum_ is passed and the
+string is copied into _buf_. If _errnum_ is not a valid error number,
+-1 is returned and _buf_ is not modified.
+
+EXAMPLE
+-------
+[source,c]
+--
+#include <event-parse.h>
+...
+struct tep_handle *tep = tep_alloc();
+...
+char buf[32];
+char *pool = calloc(1, 128);
+if (tep == NULL) {
+	tep_strerror(tep, TEP_ERRNO__MEM_ALLOC_FAILED, buf, 32);
+	printf ("The pool is not initialized, %s", buf);
+}
+...
+--
+
+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* <rostedt@...dmis.org>, author of *libtraceevent*.
+*Tzvetomir Stoyanov* <tz.stoyanov@...il.com>, author of this man page.
+--
+REPORTING BUGS
+--------------
+Report bugs to  <linux-trace-devel@...r.kernel.org>
+
+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