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tools: bpftool: preserve JSON for batch mode when dumping insns to file

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Print a "null" JSON object to standard output when bpftool is used to
print program instructions to a file, so as to avoid breaking JSON
output on batch mode.

This null object was added for most commands in a previous commit, but
this specific case had been omitted.

Fixes: 004b45c0e5 ("tools: bpftool: provide JSON output for all possible commands")
Signed-off-by: Quentin Monnet <[email protected]>
Acked-by: Jakub Kicinski <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
This commit is contained in:
Quentin Monnet 2018-02-14 22:42:54 -08:00 • committed by Daniel Borkmann
commit 52c84d36b7
1 changed files with 3 additions and 0 deletions
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3
tools/bpf/bpftool/prog.c
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@ -774,6 +774,9 @@ static int do_dump(int argc, char **argv)
n < 0 ? strerror(errno) : "short write");
goto err_free;
}
if (json_output)
jsonw_null(json_wtr);
} else {
if (member_len == &info.jited_prog_len) {
const char *name = NULL;