[PATCH 5.4 086/111] perf inject: Fix repipe usage

[Greg Kroah-Hartman]

From: Adrian Hunter <adrian.hunter@xxxxxxxxx>

[ Upstream commit 026334a3bb6a3919b42aba9fc11843db2b77fd41 ]

Since commit 14d3d54052539a1e ("perf session: Try to read pipe data from
file") 'perf inject' has started printing "PERFILE2h" when not processing
pipes.

The commit exposed perf to the possiblity that the input is not a pipe
but the 'repipe' parameter gets used. That causes the printing because
perf inject sets 'repipe' to true always.

The 'repipe' parameter of perf_session__new() is used by 2 functions:

	- perf_file_header__read_pipe()
	- trace_report()

In both cases, the functions copy data to STDOUT_FILENO when 'repipe' is
true.

Fix by setting 'repipe' to true only if the output is a pipe.

Fixes: e558a5bd8b74aff4 ("perf inject: Work with files")
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Andrew Vagin <avagin@xxxxxxxxxx>
Link: http://lore.kernel.org/lkml/20210401103605.9000-1-adrian.hunter@xxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 tools/perf/builtin-inject.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index 372ecb3e2c06..0d524ef3606d 100644
--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -835,7 +835,7 @@ int cmd_inject(int argc, const char **argv)
 	inject.tool.ordered_events = inject.sched_stat;
 
 	data.path = inject.input_name;
-	inject.session = perf_session__new(&data, true, &inject.tool);
+	inject.session = perf_session__new(&data, inject.output.is_pipe, &inject.tool);
 	if (IS_ERR(inject.session))
 		return PTR_ERR(inject.session);
 
-- 
2.30.2