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

[tip-bot for Arnaldo Carvalho de Melo]

Commit-ID:  2c83dfae021306d528b21dceb8d128ca16524c5a
Gitweb:     https://git.kernel.org/tip/2c83dfae021306d528b21dceb8d128ca16524c5a
Author:     Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Mon, 17 Dec 2018 12:06:34 -0300
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
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@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Luis ClÃudio GonÃalves <lclaudio@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Link: https://lkml.kernel.org/n/tip-krxl6klsqc9qyktoaxyih942@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 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 = {