aboutsummaryrefslogtreecommitdiffstats
path: root/lib/common_test/src/test_server_node.erl
diff options
context:
space:
mode:
Diffstat (limited to 'lib/common_test/src/test_server_node.erl')
-rw-r--r--lib/common_test/src/test_server_node.erl758
1 files changed, 758 insertions, 0 deletions
diff --git a/lib/common_test/src/test_server_node.erl b/lib/common_test/src/test_server_node.erl
new file mode 100644
index 0000000000..3419f3f5d0
--- /dev/null
+++ b/lib/common_test/src/test_server_node.erl
@@ -0,0 +1,758 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2002-2014. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%% http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+-module(test_server_node).
+-compile(r12).
+
+%%%
+%%% The same compiled code for this module must be possible to load
+%%% in R12B and later.
+%%%
+
+%% Test Controller interface
+-export([is_release_available/1]).
+-export([start_tracer_node/2,trace_nodes/2,stop_tracer_node/1]).
+-export([start_node/5, stop_node/1]).
+-export([kill_nodes/0, nodedown/1]).
+%% Internal export
+-export([node_started/1,trc/1,handle_debug/4]).
+
+-include("test_server_internal.hrl").
+-record(slave_info, {name,socket,client}).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%% %%%
+%%% All code in this module executes on the test_server_ctrl process %%%
+%%% except for node_started/1 and trc/1 which execute on a new node. %%%
+%%% %%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+is_release_available(Rel) when is_atom(Rel) ->
+ is_release_available(atom_to_list(Rel));
+is_release_available(Rel) ->
+ case os:type() of
+ {unix,_} ->
+ Erl = find_release(Rel),
+ case Erl of
+ none -> false;
+ _ -> filelib:is_regular(Erl)
+ end;
+ _ ->
+ false
+ end.
+
+nodedown(Sock) ->
+ Match = #slave_info{name='$1',socket=Sock,client='$2',_='_'},
+ case ets:match(slave_tab,Match) of
+ [[Node,_Client]] -> % Slave node died
+ gen_tcp:close(Sock),
+ ets:delete(slave_tab,Node),
+ slave_died;
+ [] ->
+ ok
+ end.
+
+
+
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%% Start trace node
+%%%
+start_tracer_node(TraceFile,TI) ->
+ Match = #slave_info{name='$1',_='_'},
+ SlaveNodes = lists:map(fun([N]) -> [" ",N] end,
+ ets:match(slave_tab,Match)),
+ TargetNode = node(),
+ Cookie = TI#target_info.cookie,
+ {ok,LSock} = gen_tcp:listen(0,[binary,{reuseaddr,true},{packet,2}]),
+ {ok,TracePort} = inet:port(LSock),
+ Prog = quote_progname(pick_erl_program(default)),
+ Cmd = lists:concat([Prog, " -sname tracer -hidden -setcookie ", Cookie,
+ " -s ", ?MODULE, " trc ", TraceFile, " ",
+ TracePort, " ", TI#target_info.os_family]),
+ spawn(fun() -> print_data(open_port({spawn,Cmd},[stream])) end),
+%! open_port({spawn,Cmd},[stream]),
+ case gen_tcp:accept(LSock,?ACCEPT_TIMEOUT) of
+ {ok,Sock} ->
+ gen_tcp:close(LSock),
+ receive
+ {tcp,Sock,Result} when is_binary(Result) ->
+ case unpack(Result) of
+ error ->
+ gen_tcp:close(Sock),
+ {error,timeout};
+ {ok,started} ->
+ trace_nodes(Sock,[TargetNode | SlaveNodes]),
+ {ok,Sock};
+ {ok,Error} -> Error
+ end;
+ {tcp_closed,Sock} ->
+ gen_tcp:close(Sock),
+ {error,could_not_start_tracernode}
+ after ?ACCEPT_TIMEOUT ->
+ gen_tcp:close(Sock),
+ {error,timeout}
+ end;
+ Error ->
+ gen_tcp:close(LSock),
+ {error,{could_not_start_tracernode,Error}}
+ end.
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%% Start a tracer on each of these nodes and set flags and patterns
+%%%
+trace_nodes(Sock,Nodes) ->
+ Bin = term_to_binary({add_nodes,Nodes}),
+ ok = gen_tcp:send(Sock, [1|Bin]),
+ receive_ack(Sock).
+
+
+receive_ack(Sock) ->
+ receive
+ {tcp,Sock,Bin} when is_binary(Bin) ->
+ case unpack(Bin) of
+ error -> receive_ack(Sock);
+ {ok,_} -> ok
+ end;
+ _ ->
+ receive_ack(Sock)
+ end.
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%% Stop trace node
+%%%
+stop_tracer_node(Sock) ->
+ Bin = term_to_binary(id(stop)),
+ ok = gen_tcp:send(Sock, [1|Bin]),
+ receive {tcp_closed,Sock} -> gen_tcp:close(Sock) end,
+ ok.
+
+
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% trc([TraceFile,Nodes]) -> ok
+%%
+%% Start tracing on the given nodes
+%%
+%% This function executes on the new node
+%%
+trc([TraceFile, PortAtom, Type]) ->
+ {Result,Patterns} =
+ case file:consult(TraceFile) of
+ {ok,TI} ->
+ Pat = parse_trace_info(lists:flatten(TI)),
+ {started,Pat};
+ Error ->
+ {Error,[]}
+ end,
+ Port = list_to_integer(atom_to_list(PortAtom)),
+ case catch gen_tcp:connect("localhost", Port, [binary,
+ {reuseaddr,true},
+ {packet,2}]) of
+ {ok,Sock} ->
+ BinResult = term_to_binary(Result),
+ ok = gen_tcp:send(Sock,[1|BinResult]),
+ trc_loop(Sock,Patterns,Type);
+ _else ->
+ ok
+ end,
+ erlang:halt().
+trc_loop(Sock,Patterns,Type) ->
+ receive
+ {tcp,Sock,Bin} ->
+ case unpack(Bin) of
+ error ->
+ ttb:stop(),
+ gen_tcp:close(Sock);
+ {ok,{add_nodes,Nodes}} ->
+ add_nodes(Nodes,Patterns,Type),
+ Bin = term_to_binary(id(ok)),
+ ok = gen_tcp:send(Sock, [1|Bin]),
+ trc_loop(Sock,Patterns,Type);
+ {ok,stop} ->
+ ttb:stop(),
+ gen_tcp:close(Sock)
+ end;
+ {tcp_closed,Sock} ->
+ ttb:stop(),
+ gen_tcp:close(Sock)
+ end.
+add_nodes(Nodes,Patterns,_Type) ->
+ ttb:tracer(Nodes,[{file,{local, test_server}},
+ {handler, {{?MODULE,handle_debug},initial}}]),
+ ttb:p(all,[call,timestamp]),
+ lists:foreach(fun({TP,M,F,A,Pat}) -> ttb:TP(M,F,A,Pat);
+ ({CTP,M,F,A}) -> ttb:CTP(M,F,A)
+ end,
+ Patterns).
+
+parse_trace_info([{TP,M,Pat}|Pats]) when TP=:=tp; TP=:=tpl ->
+ [{TP,M,'_','_',Pat}|parse_trace_info(Pats)];
+parse_trace_info([{TP,M,F,Pat}|Pats]) when TP=:=tp; TP=:=tpl ->
+ [{TP,M,F,'_',Pat}|parse_trace_info(Pats)];
+parse_trace_info([{TP,M,F,A,Pat}|Pats]) when TP=:=tp; TP=:=tpl ->
+ [{TP,M,F,A,Pat}|parse_trace_info(Pats)];
+parse_trace_info([CTP|Pats]) when CTP=:=ctp; CTP=:=ctpl; CTP=:=ctpg ->
+ [{CTP,'_','_','_'}|parse_trace_info(Pats)];
+parse_trace_info([{CTP,M}|Pats]) when CTP=:=ctp; CTP=:=ctpl; CTP=:=ctpg ->
+ [{CTP,M,'_','_'}|parse_trace_info(Pats)];
+parse_trace_info([{CTP,M,F}|Pats]) when CTP=:=ctp; CTP=:=ctpl; CTP=:=ctpg ->
+ [{CTP,M,F,'_'}|parse_trace_info(Pats)];
+parse_trace_info([{CTP,M,F,A}|Pats]) when CTP=:=ctp; CTP=:=ctpl; CTP=:=ctpg ->
+ [{CTP,M,F,A}|parse_trace_info(Pats)];
+parse_trace_info([]) ->
+ [];
+parse_trace_info([_other|Pats]) -> % ignore
+ parse_trace_info(Pats).
+
+handle_debug(Out,Trace,TI,initial) ->
+ handle_debug(Out,Trace,TI,0);
+handle_debug(_Out,end_of_trace,_TI,N) ->
+ N;
+handle_debug(Out,Trace,_TI,N) ->
+ print_trc(Out,Trace,N),
+ N+1.
+
+print_trc(Out,{trace_ts,P,call,{M,F,A},C,Ts},N) ->
+ io:format(Out,
+ "~w: ~s~n"
+ "Process : ~w~n"
+ "Call : ~w:~w/~w~n"
+ "Arguments : ~p~n"
+ "Caller : ~w~n~n",
+ [N,ts(Ts),P,M,F,length(A),A,C]);
+print_trc(Out,{trace_ts,P,call,{M,F,A},Ts},N) ->
+ io:format(Out,
+ "~w: ~s~n"
+ "Process : ~w~n"
+ "Call : ~w:~w/~w~n"
+ "Arguments : ~p~n~n",
+ [N,ts(Ts),P,M,F,length(A),A]);
+print_trc(Out,{trace_ts,P,return_from,{M,F,A},R,Ts},N) ->
+ io:format(Out,
+ "~w: ~s~n"
+ "Process : ~w~n"
+ "Return from : ~w:~w/~w~n"
+ "Return value : ~p~n~n",
+ [N,ts(Ts),P,M,F,A,R]);
+print_trc(Out,{drop,X},N) ->
+ io:format(Out,
+ "~w: Tracer dropped ~w messages - too busy~n~n",
+ [N,X]);
+print_trc(Out,Trace,N) ->
+ Ts = element(size(Trace),Trace),
+ io:format(Out,
+ "~w: ~s~n"
+ "Trace : ~p~n~n",
+ [N,ts(Ts),Trace]).
+ts({_, _, Micro} = Now) ->
+ {{Y,M,D},{H,Min,S}} = calendar:now_to_local_time(Now),
+ io_lib:format("~4.4.0w-~2.2.0w-~2.2.0w ~2.2.0w:~2.2.0w:~2.2.0w,~6.6.0w",
+ [Y,M,D,H,Min,S,Micro]).
+
+
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%% Start slave/peer nodes (initiated by test_server:start_node/5)
+%%%
+start_node(SlaveName, slave, Options, From, TI) when is_list(SlaveName) ->
+ start_node_slave(list_to_atom(SlaveName), Options, From, TI);
+start_node(SlaveName, slave, Options, From, TI) ->
+ start_node_slave(SlaveName, Options, From, TI);
+start_node(SlaveName, peer, Options, From, TI) when is_atom(SlaveName) ->
+ start_node_peer(atom_to_list(SlaveName), Options, From, TI);
+start_node(SlaveName, peer, Options, From, TI) ->
+ start_node_peer(SlaveName, Options, From, TI);
+start_node(_SlaveName, _Type, _Options, _From, _TI) ->
+ not_implemented_yet.
+
+%%
+%% Peer nodes are always started on the same host as test_server_ctrl
+%%
+%% (Socket communication is used since in early days the test target
+%% and the test server controller node could be on different hosts and
+%% the target could not know the controller node via erlang
+%% distribution)
+%%
+start_node_peer(SlaveName, OptList, From, TI) ->
+ SuppliedArgs = start_node_get_option_value(args, OptList, []),
+ Cleanup = start_node_get_option_value(cleanup, OptList, true),
+ HostStr = test_server_sup:hoststr(),
+ {ok,LSock} = gen_tcp:listen(0,[binary,
+ {reuseaddr,true},
+ {packet,2}]),
+ {ok,WaitPort} = inet:port(LSock),
+ NodeStarted = lists:concat([" -s ", ?MODULE, " node_started ",
+ HostStr, " ", WaitPort]),
+
+ % Support for erl_crash_dump files..
+ CrashFile = filename:join([TI#target_info.test_server_dir,
+ "erl_crash_dump."++cast_to_list(SlaveName)]),
+ CrashArgs = lists:concat([" -env ERL_CRASH_DUMP \"",CrashFile,"\" "]),
+ FailOnError = start_node_get_option_value(fail_on_error, OptList, true),
+ Pa = TI#target_info.test_server_dir,
+ Prog0 = start_node_get_option_value(erl, OptList, default),
+ Prog = quote_progname(pick_erl_program(Prog0)),
+ Args =
+ case string:str(SuppliedArgs,"-setcookie") of
+ 0 -> "-setcookie " ++ TI#target_info.cookie ++ " " ++ SuppliedArgs;
+ _ -> SuppliedArgs
+ end,
+ Cmd = lists:concat([Prog,
+ " -detached ",
+ TI#target_info.naming, " ", SlaveName,
+ " -pa \"", Pa,"\"",
+ NodeStarted,
+ CrashArgs,
+ " ", Args]),
+ Opts = case start_node_get_option_value(env, OptList, []) of
+ [] -> [];
+ Env -> [{env, Env}]
+ end,
+ %% peer is always started on localhost
+ %%
+ %% Bad environment can cause open port to fail. If this happens,
+ %% we ignore it and let the testcase handle the situation...
+ catch open_port({spawn, Cmd}, [stream|Opts]),
+
+ Tmo = 60000 * test_server:timetrap_scale_factor(),
+
+ case start_node_get_option_value(wait, OptList, true) of
+ true ->
+ Ret = wait_for_node_started(LSock,Tmo,undefined,Cleanup,TI,self()),
+ case {Ret,FailOnError} of
+ {{{ok, Node}, Warning},_} ->
+ gen_server:reply(From,{{ok,Node},HostStr,Cmd,[],Warning});
+ {_,false} ->
+ gen_server:reply(From,{Ret, HostStr, Cmd});
+ {_,true} ->
+ gen_server:reply(From,{fail,{Ret, HostStr, Cmd}})
+ end;
+ false ->
+ Nodename = list_to_atom(SlaveName ++ "@" ++ HostStr),
+ I = "=== Not waiting for node",
+ gen_server:reply(From,{{ok, Nodename}, HostStr, Cmd, I, []}),
+ Self = self(),
+ spawn_link(
+ fun() ->
+ wait_for_node_started(LSock,Tmo,undefined,
+ Cleanup,TI,Self),
+ receive after infinity -> ok end
+ end),
+ ok
+ end.
+
+%%
+%% Slave nodes are started on a remote host if
+%% - the option remote is given when calling test_server:start_node/3
+%%
+start_node_slave(SlaveName, OptList, From, TI) ->
+ SuppliedArgs = start_node_get_option_value(args, OptList, []),
+ Cleanup = start_node_get_option_value(cleanup, OptList, true),
+
+ CrashFile = filename:join([TI#target_info.test_server_dir,
+ "erl_crash_dump."++cast_to_list(SlaveName)]),
+ CrashArgs = lists:concat([" -env ERL_CRASH_DUMP \"",CrashFile,"\" "]),
+ Pa = TI#target_info.test_server_dir,
+ Args = lists:concat([" -pa \"", Pa, "\" ", SuppliedArgs, CrashArgs]),
+
+ Prog0 = start_node_get_option_value(erl, OptList, default),
+ Prog = pick_erl_program(Prog0),
+ Ret =
+ case start_which_node(OptList) of
+ {error,Reason} -> {{error,Reason},undefined,undefined};
+ Host0 -> do_start_node_slave(Host0,SlaveName,Args,Prog,Cleanup)
+ end,
+ gen_server:reply(From,Ret).
+
+
+do_start_node_slave(Host0, SlaveName, Args, Prog, Cleanup) ->
+ Host =
+ case Host0 of
+ local -> test_server_sup:hoststr();
+ _ -> cast_to_list(Host0)
+ end,
+ Cmd = Prog ++ " " ++ Args,
+ case slave:start(Host, SlaveName, Args, no_link, Prog) of
+ {ok,Nodename} ->
+ case Cleanup of
+ true -> ets:insert(slave_tab,#slave_info{name=Nodename});
+ false -> ok
+ end,
+ {{ok,Nodename}, Host, Cmd, [], []};
+ Ret ->
+ {Ret, Host, Cmd}
+ end.
+
+
+wait_for_node_started(LSock,Timeout,Client,Cleanup,TI,CtrlPid) ->
+ case gen_tcp:accept(LSock,Timeout) of
+ {ok,Sock} ->
+ gen_tcp:close(LSock),
+ receive
+ {tcp,Sock,Started0} when is_binary(Started0) ->
+ case unpack(Started0) of
+ error ->
+ gen_tcp:close(Sock),
+ {error, connection_closed};
+ {ok,Started} ->
+ Version = TI#target_info.otp_release,
+ VsnStr = TI#target_info.system_version,
+ {ok,Nodename, W} =
+ handle_start_node_return(Version,
+ VsnStr,
+ Started),
+ case Cleanup of
+ true ->
+ ets:insert(slave_tab,#slave_info{name=Nodename,
+ socket=Sock,
+ client=Client});
+ false -> ok
+ end,
+ gen_tcp:controlling_process(Sock,CtrlPid),
+ test_server_ctrl:node_started(Nodename),
+ {{ok,Nodename},W}
+ end;
+ {tcp_closed,Sock} ->
+ gen_tcp:close(Sock),
+ {error, connection_closed}
+ after Timeout ->
+ gen_tcp:close(Sock),
+ {error, timeout}
+ end;
+ {error,Reason} ->
+ gen_tcp:close(LSock),
+ {error, {no_connection,Reason}}
+ end.
+
+
+
+handle_start_node_return(Version,VsnStr,{started, Node, Version, VsnStr}) ->
+ {ok, Node, []};
+handle_start_node_return(Version,VsnStr,{started, Node, OVersion, OVsnStr}) ->
+ Str = io_lib:format("WARNING: Started node "
+ "reports different system "
+ "version than current node! "
+ "Current node version: ~p, ~p "
+ "Started node version: ~p, ~p",
+ [Version, VsnStr,
+ OVersion, OVsnStr]),
+ Str1 = lists:flatten(Str),
+ {ok, Node, Str1}.
+
+
+%%
+%% This function executes on the new node
+%%
+node_started([Host,PortAtom]) ->
+ %% Must spawn a new process because the boot process should not
+ %% hang forever!!
+ spawn(fun() -> node_started(Host,PortAtom) end).
+
+%% This process hangs forever, just waiting for the socket to be
+%% closed and terminating the node
+node_started(Host,PortAtom) ->
+ {_, Version} = init:script_id(),
+ VsnStr = erlang:system_info(system_version),
+ Port = list_to_integer(atom_to_list(PortAtom)),
+ case catch gen_tcp:connect(Host,Port, [binary,
+ {reuseaddr,true},
+ {packet,2}]) of
+
+ {ok,Sock} ->
+ Started = term_to_binary({started, node(), Version, VsnStr}),
+ ok = gen_tcp:send(Sock, [1|Started]),
+ receive _Anyting ->
+ gen_tcp:close(Sock),
+ erlang:halt()
+ end;
+ _else ->
+ erlang:halt()
+ end.
+
+
+
+
+
+% start_which_node(Optlist) -> hostname
+start_which_node(Optlist) ->
+ case start_node_get_option_value(remote, Optlist) of
+ undefined ->
+ local;
+ true ->
+ case find_remote_host() of
+ {error, Other} ->
+ {error, Other};
+ RHost ->
+ RHost
+ end
+ end.
+
+find_remote_host() ->
+ HostList=test_server_ctrl:get_hosts(),
+ case lists:delete(test_server_sup:hoststr(), HostList) of
+ [] ->
+ {error, no_remote_hosts};
+ [RHost|_Rest] ->
+ RHost
+ end.
+
+start_node_get_option_value(Key, List) ->
+ start_node_get_option_value(Key, List, undefined).
+
+start_node_get_option_value(Key, List, Default) ->
+ case lists:keysearch(Key, 1, List) of
+ {value, {Key, Value}} ->
+ Value;
+ false ->
+ Default
+ end.
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% stop_node(Name) -> ok | {error,Reason}
+%%
+%% Clean up - test_server will stop this node
+stop_node(Name) ->
+ case ets:lookup(slave_tab,Name) of
+ [#slave_info{}] ->
+ ets:delete(slave_tab,Name),
+ ok;
+ [] ->
+ {error, not_a_slavenode}
+ end.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% kill_nodes() -> ok
+%%
+%% Brutally kill all slavenodes that were not stopped by test_server
+kill_nodes() ->
+ case ets:match_object(slave_tab,'_') of
+ [] -> [];
+ List ->
+ lists:map(fun(SI) -> kill_node(SI) end, List)
+ end.
+
+kill_node(SI) ->
+ Name = SI#slave_info.name,
+ ets:delete(slave_tab,Name),
+ case SI#slave_info.socket of
+ undefined ->
+ catch rpc:call(Name,erlang,halt,[]);
+ Sock ->
+ gen_tcp:close(Sock)
+ end,
+ Name.
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%% cast_to_list(X) -> string()
+%%% X = list() | atom() | void()
+%%% Returns a string representation of whatever was input
+
+cast_to_list(X) when is_list(X) -> X;
+cast_to_list(X) when is_atom(X) -> atom_to_list(X);
+cast_to_list(X) -> lists:flatten(io_lib:format("~w", [X])).
+
+
+%%% L contains elements of the forms
+%%% {prog, String}
+%%% {release, Rel} where Rel = String | latest | previous
+%%% this
+%%%
+pick_erl_program(default) ->
+ cast_to_list(lib:progname());
+pick_erl_program(L) ->
+ P = random_element(L),
+ case P of
+ {prog, S} ->
+ S;
+ {release, S} ->
+ find_release(S);
+ this ->
+ cast_to_list(lib:progname())
+ end.
+
+%% This is an attempt to distinguish between spaces in the program
+%% path and spaces that separate arguments. The program is quoted to
+%% allow spaces in the path.
+%%
+%% Arguments could exist either if the executable is excplicitly given
+%% ({prog,String}) or if the -program switch to beam is used and
+%% includes arguments (typically done by cerl in OTP test environment
+%% in order to ensure that slave/peer nodes are started with the same
+%% emulator and flags as the test node. The return from lib:progname()
+%% could then typically be '/<full_path_to>/cerl -gcov').
+quote_progname(Progname) ->
+ do_quote_progname(string:tokens(Progname," ")).
+
+do_quote_progname([Prog]) ->
+ "\""++Prog++"\"";
+do_quote_progname([Prog,Arg|Args]) ->
+ case os:find_executable(Prog) of
+ false ->
+ do_quote_progname([Prog++" "++Arg | Args]);
+ _ ->
+ %% this one has an executable - we assume the rest are arguments
+ "\""++Prog++"\""++
+ lists:flatten(lists:map(fun(X) -> [" ",X] end, [Arg|Args]))
+ end.
+
+random_element(L) ->
+ lists:nth(rand:uniform(length(L)), L).
+
+find_release(latest) ->
+ "/usr/local/otp/releases/latest/bin/erl";
+find_release(previous) ->
+ "kaka";
+find_release(Rel) ->
+ find_release(os:type(), Rel).
+
+find_release({unix,sunos}, Rel) ->
+ case os:cmd("uname -p") of
+ "sparc" ++ _ ->
+ "/usr/local/otp/releases/otp_beam_solaris8_" ++ Rel ++ "/bin/erl";
+ _ ->
+ none
+ end;
+find_release({unix,linux}, Rel) ->
+ Candidates = find_rel_linux(Rel),
+ case lists:dropwhile(fun(N) ->
+ not filelib:is_regular(N)
+ end, Candidates) of
+ [] -> none;
+ [Erl|_] -> Erl
+ end;
+find_release(_, _) -> none.
+
+find_rel_linux(Rel) ->
+ case suse_release() of
+ none -> [];
+ SuseRel -> find_rel_suse(Rel, SuseRel)
+ end.
+
+find_rel_suse(Rel, SuseRel) ->
+ Root = "/usr/local/otp/releases/sles",
+ case SuseRel of
+ "11" ->
+ %% Try both SuSE 11, SuSE 10 and SuSe 9 in that order.
+ find_rel_suse_1(Rel, Root++"11") ++
+ find_rel_suse_1(Rel, Root++"10") ++
+ find_rel_suse_1(Rel, Root++"9");
+ "10" ->
+ %% Try both SuSE 10 and SuSe 9 in that order.
+ find_rel_suse_1(Rel, Root++"10") ++
+ find_rel_suse_1(Rel, Root++"9");
+ "9" ->
+ find_rel_suse_1(Rel, Root++"9");
+ _ ->
+ []
+ end.
+
+find_rel_suse_1(Rel, RootWc) ->
+ case erlang:system_info(wordsize) of
+ 4 ->
+ find_rel_suse_2(Rel, RootWc++"_32");
+ 8 ->
+ find_rel_suse_2(Rel, RootWc++"_64") ++
+ find_rel_suse_2(Rel, RootWc++"_32")
+ end.
+
+find_rel_suse_2(Rel, RootWc) ->
+ RelDir = filename:dirname(RootWc),
+ Pat = filename:basename(RootWc ++ "_" ++ Rel) ++ ".*",
+ case file:list_dir(RelDir) of
+ {ok,Dirs} ->
+ case lists:filter(fun(Dir) ->
+ case re:run(Dir, Pat) of
+ nomatch -> false;
+ _ -> true
+ end
+ end, Dirs) of
+ [] ->
+ [];
+ [R|_] ->
+ [filename:join([RelDir,R,"bin","erl"])]
+ end;
+ _ ->
+ []
+ end.
+
+%% suse_release() -> VersionString | none.
+%% Return the major SuSE version number for this platform or
+%% 'none' if this is not a SuSE platform.
+suse_release() ->
+ case file:open("/etc/SuSE-release", [read]) of
+ {ok,Fd} ->
+ try
+ suse_release(Fd)
+ after
+ file:close(Fd)
+ end;
+ {error,_} -> none
+ end.
+
+suse_release(Fd) ->
+ case io:get_line(Fd, '') of
+ eof -> none;
+ Line when is_list(Line) ->
+ case re:run(Line, "^VERSION\\s*=\\s*(\\d+)\s*",
+ [{capture,all_but_first,list}]) of
+ nomatch ->
+ suse_release(Fd);
+ {match,[Version]} ->
+ Version
+ end
+ end.
+
+unpack(Bin) ->
+ {One,Term} = split_binary(Bin, 1),
+ case binary_to_list(One) of
+ [1] ->
+ case catch {ok,binary_to_term(Term)} of
+ {'EXIT',_} -> error;
+ {ok,_}=Res -> Res
+ end;
+ _ -> error
+ end.
+
+id(I) -> I.
+
+print_data(Port) ->
+ receive
+ {Port, {data, Bytes}} ->
+ io:put_chars(Bytes),
+ print_data(Port);
+ {Port, eof} ->
+ Port ! {self(), close},
+ receive
+ {Port, closed} ->
+ true
+ end,
+ receive
+ {'EXIT', Port, _} ->
+ ok
+ after 1 -> % force context switch
+ ok
+ end
+ end.