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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017. 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%
+%%
+
+%%
+%% File: os_signal_SUITE.erl
+%% Author: Björn-Egil Dahlberg
+%% Created: 2017-01-13
+%%
+
+-module(os_signal_SUITE).
+
+-include_lib("common_test/include/ct.hrl").
+-export([all/0, suite/0]).
+-export([init_per_testcase/2, end_per_testcase/2]).
+-export([init_per_suite/1, end_per_suite/1]).
+
+-export([set_alarm/1, fork/0, get_exit_code/1]).
+
+% Test cases
+-export([set_unset/1,
+ t_sighup/1,
+ t_sigusr1/1,
+ t_sigusr2/1,
+ t_sigterm/1,
+ t_sigalrm/1,
+ t_sigchld/1,
+ t_sigchld_fork/1]).
+
+-define(signal_server, erl_signal_server).
+
+suite() ->
+ [{ct_hooks,[ts_install_cth]},
+ {timetrap, {minutes, 2}}].
+
+all() ->
+ case os:type() of
+ {win32, _} -> [];
+ _ -> [set_unset,
+ t_sighup,
+ t_sigusr1,
+ t_sigusr2,
+ t_sigterm,
+ t_sigalrm,
+ t_sigchld,
+ t_sigchld_fork]
+ end.
+
+init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
+ Pid = erlang:whereis(?signal_server),
+ true = erlang:unregister(?signal_server),
+ [{signal_server, Pid}|Config].
+
+end_per_testcase(_Func, Config) ->
+ case proplists:get_value(signal_server, Config) of
+ undefined -> ok;
+ Pid ->
+ true = erlang:register(?signal_server, Pid),
+ ok
+ end.
+
+init_per_suite(Config) ->
+ load_nif(Config),
+ Config.
+
+end_per_suite(_Config) ->
+ ok.
+
+%% tests
+
+set_unset(_Config) ->
+ Signals = [sighup, %sigint,
+ sigquit, %sigill,
+ sigabrt,
+ sigalrm, sigterm,
+ sigusr1, sigusr2,
+ sigchld,
+ sigstop, sigtstp],
+ F1 = fun(Sig) -> ok = os:set_signal(Sig,handle) end,
+ F2 = fun(Sig) -> ok = os:set_signal(Sig,default) end,
+ F3 = fun(Sig) -> ok = os:set_signal(Sig,ignore) end,
+ %% set handle
+ ok = lists:foreach(F1, Signals),
+ %% set ignore
+ ok = lists:foreach(F2, Signals),
+ %% set default
+ ok = lists:foreach(F3, Signals),
+ ok.
+
+t_sighup(_Config) ->
+ Pid1 = setup_service(),
+ OsPid = os:getpid(),
+ os:set_signal(sighup, handle),
+ ok = kill("HUP", OsPid),
+ ok = kill("HUP", OsPid),
+ ok = kill("HUP", OsPid),
+ Msgs1 = fetch_msgs(Pid1),
+ io:format("Msgs1: ~p~n", [Msgs1]),
+ [{notify,sighup},
+ {notify,sighup},
+ {notify,sighup}] = Msgs1,
+ %% no proc
+ ok = kill("HUP", OsPid),
+ ok = kill("HUP", OsPid),
+ ok = kill("HUP", OsPid),
+ %% ignore
+ Pid2 = setup_service(),
+ os:set_signal(sighup, ignore),
+ ok = kill("HUP", OsPid),
+ ok = kill("HUP", OsPid),
+ ok = kill("HUP", OsPid),
+ Msgs2 = fetch_msgs(Pid2),
+ io:format("Msgs2: ~p~n", [Msgs2]),
+ [] = Msgs2,
+ %% reset to handle (it's the default)
+ os:set_signal(sighup, handle),
+ ok.
+
+t_sigusr1(_Config) ->
+ Pid1 = setup_service(),
+ OsPid = os:getpid(),
+ os:set_signal(sigusr1, handle),
+ ok = kill("USR1", OsPid),
+ ok = kill("USR1", OsPid),
+ ok = kill("USR1", OsPid),
+ Msgs1 = fetch_msgs(Pid1),
+ io:format("Msgs1: ~p~n", [Msgs1]),
+ [{notify,sigusr1},
+ {notify,sigusr1},
+ {notify,sigusr1}] = Msgs1,
+ %% no proc
+ ok = kill("USR1", OsPid),
+ ok = kill("USR1", OsPid),
+ ok = kill("USR1", OsPid),
+ %% ignore
+ Pid2 = setup_service(),
+ os:set_signal(sigusr1, ignore),
+ ok = kill("USR1", OsPid),
+ ok = kill("USR1", OsPid),
+ ok = kill("USR1", OsPid),
+ Msgs2 = fetch_msgs(Pid2),
+ io:format("Msgs2: ~p~n", [Msgs2]),
+ [] = Msgs2,
+ %% reset to ignore (it's the default)
+ os:set_signal(sigusr1, handle),
+ ok.
+
+t_sigusr2(_Config) ->
+ Pid1 = setup_service(),
+ OsPid = os:getpid(),
+ os:set_signal(sigusr2, handle),
+ ok = kill("USR2", OsPid),
+ ok = kill("USR2", OsPid),
+ ok = kill("USR2", OsPid),
+ Msgs1 = fetch_msgs(Pid1),
+ io:format("Msgs1: ~p~n", [Msgs1]),
+ [{notify,sigusr2},
+ {notify,sigusr2},
+ {notify,sigusr2}] = Msgs1,
+ %% no proc
+ ok = kill("USR2", OsPid),
+ ok = kill("USR2", OsPid),
+ ok = kill("USR2", OsPid),
+ %% ignore
+ Pid2 = setup_service(),
+ os:set_signal(sigusr2, ignore),
+ ok = kill("USR2", OsPid),
+ ok = kill("USR2", OsPid),
+ ok = kill("USR2", OsPid),
+ Msgs2 = fetch_msgs(Pid2),
+ io:format("Msgs2: ~p~n", [Msgs2]),
+ [] = Msgs2,
+ %% reset to ignore (it's the default)
+ os:set_signal(sigusr2, ignore),
+ ok.
+
+t_sigterm(_Config) ->
+ Pid1 = setup_service(),
+ OsPid = os:getpid(),
+ os:set_signal(sigterm, handle),
+ ok = kill("TERM", OsPid),
+ ok = kill("TERM", OsPid),
+ ok = kill("TERM", OsPid),
+ Msgs1 = fetch_msgs(Pid1),
+ io:format("Msgs1: ~p~n", [Msgs1]),
+ [{notify,sigterm},
+ {notify,sigterm},
+ {notify,sigterm}] = Msgs1,
+ %% no proc
+ ok = kill("TERM", OsPid),
+ ok = kill("TERM", OsPid),
+ ok = kill("TERM", OsPid),
+ %% ignore
+ Pid2 = setup_service(),
+ os:set_signal(sigterm, ignore),
+ ok = kill("TERM", OsPid),
+ ok = kill("TERM", OsPid),
+ ok = kill("TERM", OsPid),
+ Msgs2 = fetch_msgs(Pid2),
+ io:format("Msgs2: ~p~n", [Msgs2]),
+ [] = Msgs2,
+ %% reset to handle (it's the default)
+ os:set_signal(sigterm, handle),
+ ok.
+
+t_sigchld(_Config) ->
+ Pid1 = setup_service(),
+ OsPid = os:getpid(),
+ os:set_signal(sigchld, handle),
+ ok = kill("CHLD", OsPid),
+ ok = kill("CHLD", OsPid),
+ ok = kill("CHLD", OsPid),
+ Msgs1 = fetch_msgs(Pid1),
+ io:format("Msgs1: ~p~n", [Msgs1]),
+ [{notify,sigchld},
+ {notify,sigchld},
+ {notify,sigchld}] = Msgs1,
+ %% no proc
+ ok = kill("CHLD", OsPid),
+ ok = kill("CHLD", OsPid),
+ ok = kill("CHLD", OsPid),
+ %% ignore
+ Pid2 = setup_service(),
+ os:set_signal(sigchld, ignore),
+ ok = kill("CHLD", OsPid),
+ ok = kill("CHLD", OsPid),
+ ok = kill("CHLD", OsPid),
+ Msgs2 = fetch_msgs(Pid2),
+ io:format("Msgs2: ~p~n", [Msgs2]),
+ [] = Msgs2,
+ %% reset to handle (it's the default)
+ os:set_signal(sigchld, ignore),
+ ok.
+
+
+t_sigalrm(_Config) ->
+ Pid1 = setup_service(),
+ ok = os:set_signal(sigalrm, handle),
+ ok = os_signal_SUITE:set_alarm(1),
+ receive after 3000 -> ok end,
+ Msgs1 = fetch_msgs(Pid1),
+ [{notify,sigalrm}] = Msgs1,
+ io:format("Msgs1: ~p~n", [Msgs1]),
+ os:set_signal(sigalrm, ignore),
+ Pid2 = setup_service(),
+ ok = os_signal_SUITE:set_alarm(1),
+ receive after 3000 -> ok end,
+ Msgs2 = fetch_msgs(Pid2),
+ [] = Msgs2,
+ io:format("Msgs2: ~p~n", [Msgs2]),
+ Pid3 = setup_service(),
+ os:set_signal(sigalrm, handle),
+ ok = os_signal_SUITE:set_alarm(1),
+ receive after 3000 -> ok end,
+ Msgs3 = fetch_msgs(Pid3),
+ [{notify,sigalrm}] = Msgs3,
+ io:format("Msgs3: ~p~n", [Msgs3]),
+ os:set_signal(sigalrm, ignore),
+ ok.
+
+t_sigchld_fork(_Config) ->
+ Pid1 = setup_service(),
+ ok = os:set_signal(sigchld, handle),
+ {ok,OsPid} = os_signal_SUITE:fork(),
+ receive after 3000 -> ok end,
+ Msgs1 = fetch_msgs(Pid1),
+ io:format("Msgs1: ~p~n", [Msgs1]),
+ [{notify,sigchld}] = Msgs1,
+ {ok,Status} = os_signal_SUITE:get_exit_code(OsPid),
+ io:format("exit status from ~w : ~w~n", [OsPid,Status]),
+ 42 = Status,
+ %% reset to ignore (it's the default)
+ os:set_signal(sigchld, ignore),
+ ok.
+
+
+%% nif stubs
+
+set_alarm(_Secs) -> no.
+fork() -> no.
+get_exit_code(_OsPid) -> no.
+
+%% aux
+
+setup_service() ->
+ Pid = spawn_link(fun msgs/0),
+ true = erlang:register(?signal_server, Pid),
+ Pid.
+
+msgs() ->
+ msgs([]).
+msgs(Ms) ->
+ receive
+ {Pid, fetch_msgs} -> Pid ! {self(), lists:reverse(Ms)};
+ Msg ->
+ msgs([Msg|Ms])
+ end.
+
+fetch_msgs(Pid) ->
+ Pid ! {self(), fetch_msgs},
+ receive {Pid, Msgs} -> Msgs end.
+
+kill(Signal, Pid) ->
+ {0,_} = run("kill", ["-s", Signal, Pid]),
+ receive after 200 -> ok end,
+ ok.
+
+load_nif(Config) ->
+ Path = proplists:get_value(data_dir, Config),
+ case erlang:load_nif(filename:join(Path,"os_signal_nif"), 0) of
+ ok -> ok;
+ {error,{reload,_}} -> ok
+ end.
+
+run(Program0, Args) -> run(".", Program0, Args).
+run(Cwd, Program0, Args) when is_list(Cwd) ->
+ Program = case os:find_executable(Program0) of
+ Path when is_list(Path) ->
+ Path;
+ false ->
+ exit(no)
+ end,
+ Options = [{args,Args},binary,exit_status,stderr_to_stdout,
+ {line,4096}, {cd, Cwd}],
+ try open_port({spawn_executable,Program}, Options) of
+ Port ->
+ run_loop(Port, [])
+ catch
+ error:_ ->
+ exit(no)
+ end.
+
+run_loop(Port, Output) ->
+ receive
+ {Port,{exit_status,Status}} ->
+ {Status,lists:reverse(Output)};
+ {Port,{data,{eol,Bin}}} ->
+ run_loop(Port, [Bin|Output]);
+ _Msg ->
+ run_loop(Port, Output)
+ end.
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