linux-kernel - [tip:perf/core] perf trace: Enclose the errno strings with ()

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Date:   Thu, 20 Dec 2018 10:25:29 -0800
From:   tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     wangnan0@...wei.com, lclaudio@...hat.com, mingo@...nel.org,
        acme@...hat.com, hpa@...or.com, jolsa@...nel.org,
        linux-kernel@...r.kernel.org, namhyung@...nel.org,
        tglx@...utronix.de, adrian.hunter@...el.com
Subject: [tip:perf/core] perf trace: Enclose the errno strings with ()

Commit-ID:  2c83dfae021306d528b21dceb8d128ca16524c5a
Gitweb:     https://git.kernel.org/tip/2c83dfae021306d528b21dceb8d128ca16524c5a
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Mon, 17 Dec 2018 12:06:34 -0300
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Tue, 18 Dec 2018 16:15:18 -0300

perf trace: Enclose the errno strings with ()

To match strace, now both emit the same line for calls like:

 access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)

Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Wang Nan <wangnan0@...wei.com>
Link: https://lkml.kernel.org/n/tip-krxl6klsqc9qyktoaxyih942@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/builtin-trace.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 226e994ac638..35d8fbe47ee4 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -2024,10 +2024,10 @@ errno_print: {
 		const char *emsg = str_error_r(-ret, bf, sizeof(bf)),
 			   *e = errno_to_name(evsel, -ret);
 
-		fprintf(trace->output, "-1 %s %s", e, emsg);
+		fprintf(trace->output, "-1 %s (%s)", e, emsg);
 	}
 	} else if (ret == 0 && sc->fmt->timeout)
-		fprintf(trace->output, "0 Timeout");
+		fprintf(trace->output, "0 (Timeout)");
 	else if (ttrace->ret_scnprintf) {
 		char bf[1024];
 		struct syscall_arg arg = {