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emqx
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fix: don't crash when OTP_VERSION file is missing

This commit is contained in:
Zhongwen Deng 2023-01-28 11:53:54 +08:00
parent 5783127c30
commit 6162f90610
1 changed files with 5 additions and 3 deletions
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8
apps/emqx/src/emqx_vm.erl
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@ -400,7 +400,7 @@ compat_windows(Fun) ->
end end
end. end.
%% @doc Return on which Eralng/OTP the current vm is running. %% @doc Return on which Erlang/OTP the current vm is running.
%% NOTE: This API reads a file, do not use it in critical code paths. %% NOTE: This API reads a file, do not use it in critical code paths.
get_otp_version() -> get_otp_version() ->
read_otp_version(). read_otp_version().
@ -417,6 +417,8 @@ read_otp_version() ->
%% running tests etc. %% running tests etc.
OtpMajor = erlang:system_info(otp_release), OtpMajor = erlang:system_info(otp_release),
OtpVsnFile = filename:join([ReleasesDir, OtpMajor, "OTP_VERSION"]), OtpVsnFile = filename:join([ReleasesDir, OtpMajor, "OTP_VERSION"]),
{ok, Vsn} = file:read_file(OtpVsnFile), case file:read_file(OtpVsnFile) of
Vsn {ok, Vsn} -> Vsn;
{error, enoent} -> list_to_binary(OtpMajor)
end
end. end.