Commit 1a1a0b03 authored by Paul Chaignon's avatar Paul Chaignon Committed by Andrii Nakryiko
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bpftool: Enable line buffering for stdout 



The output of bpftool prog tracelog is currently buffered, which is
inconvenient when piping the output into other commands. A simple
tracelog | grep will typically not display anything. This patch fixes it
by enabling line buffering on stdout for the whole bpftool binary.

Fixes: 30da46b5 ("tools: bpftool: add a command to dump the trace pipe")
Signed-off-by: default avatarQuentin Monnet <quentin@isovalent.com>
Signed-off-by: default avatarPaul Chaignon <paul@isovalent.com>
Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Acked-by: default avatarYonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20211220214528.GA11706@Mem
parent 0dd668d2

tools/bpf/bpftool/main.c

+2 −0
Original line number Diff line number Diff line
@@ -408,6 +408,8 @@ int main(int argc, char **argv) 
	bool version_requested = false;

	int opt, ret;



	setlinebuf(stdout);



	last_do_help = do_help;

	pretty_output = false;

	json_output = false;