[tip:perf/core] tools lib traceevent: Use str_error_r()

From: tip-bot for Arnaldo Carvalho de Melo
Date: Wed Jul 13 2016 - 03:13:52 EST


Commit-ID: c3cec9e68f12d0046f991378391172958b5315d9
Gitweb: http://git.kernel.org/tip/c3cec9e68f12d0046f991378391172958b5315d9
Author: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Fri, 8 Jul 2016 15:21:37 -0300
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 12 Jul 2016 15:20:28 -0300

tools lib traceevent: Use str_error_r()

To make it portable to non-glibc systems, that follow the XSI variant
instead of the GNU specific one that gets in place when _GNU_SOURCE is
defined.

Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-c1gn8x978qfop65m510wy43o@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/lib/traceevent/event-parse.c | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index a8b6357..3a7bd17 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -31,6 +31,7 @@
#include <errno.h>
#include <stdint.h>
#include <limits.h>
+#include <linux/string.h>

#include <netinet/ip6.h>
#include "event-parse.h"
@@ -6131,12 +6132,7 @@ int pevent_strerror(struct pevent *pevent __maybe_unused,
const char *msg;

if (errnum >= 0) {
- msg = strerror_r(errnum, buf, buflen);
- if (msg != buf) {
- size_t len = strlen(msg);
- memcpy(buf, msg, min(buflen - 1, len));
- *(buf + min(buflen - 1, len)) = '\0';
- }
+ str_error_r(errnum, buf, buflen);
return 0;
}