lkml.org 
[lkml]   [2022]   [Jan]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 5.10 188/563] bpftool: Enable line buffering for stdout
    Date
    From: Paul Chaignon <paul@isovalent.com>

    [ Upstream commit 1a1a0b0364ad291bd8e509da104ac8b5b1afec5d ]

    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: 30da46b5dc3a ("tools: bpftool: add a command to dump the trace pipe")
    Signed-off-by: Quentin Monnet <quentin@isovalent.com>
    Signed-off-by: Paul Chaignon <paul@isovalent.com>
    Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
    Acked-by: Yonghong Song <yhs@fb.com>
    Link: https://lore.kernel.org/bpf/20211220214528.GA11706@Mem
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    tools/bpf/bpftool/main.c | 2 ++
    1 file changed, 2 insertions(+)

    diff --git a/tools/bpf/bpftool/main.c b/tools/bpf/bpftool/main.c
    index c58a135dc355e..1854d6b978604 100644
    --- a/tools/bpf/bpftool/main.c
    +++ b/tools/bpf/bpftool/main.c
    @@ -396,6 +396,8 @@ int main(int argc, char **argv)
    };
    int opt, ret;

    + setlinebuf(stdout);
    +
    last_do_help = do_help;
    pretty_output = false;
    json_output = false;
    --
    2.34.1


    \
     
     \ /
      Last update: 2022-01-25 04:10    [W:2.945 / U:0.044 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site