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28 
29 #include "utils/signals/misc.hpp"
30 
31 extern "C" {
32 #include <signal.h>
33 #include <unistd.h>
34 }
35 
36 #include <cstdlib>
37 
38 #include <atf-c++.hpp>
39 
40 #include "utils/defs.hpp"
41 #include "utils/fs/path.hpp"
42 #include "utils/process/child.ipp"
43 #include "utils/signals/exceptions.hpp"
44 
45 namespace fs = utils::fs;
46 namespace process = utils::process;
47 namespace signals = utils::signals;
48 
49 
50 namespace {
51 
52 
53 static void program_reset_raise(void) UTILS_NORETURN;
54 
55 
56 /// Body of a subprocess that tests the signal::reset function.
57 ///
58 /// This function programs a signal to be ignored, then uses signal::reset to
59 /// bring it back to its default handler and then delivers the signal to self.
60 /// The default behavior of the signal is for the process to die, so this
61 /// function should never return correctly (and thus the child process should
62 /// always die due to a signal if all goes well).
63 static void
64 program_reset_raise(void)
65 {
66     struct ::sigaction sa;
67     sa.sa_handler = SIG_IGN;
68     sigemptyset(&sa.sa_mask);
69     sa.sa_flags = 0;
70     if (::sigaction(SIGUSR1, &sa, NULL) == -1)
71         std::exit(EXIT_FAILURE);
72 
73     signals::reset(SIGUSR1);
74     ::kill(::getpid(), SIGUSR1);
75 
76     // Should not be reached, but we do not assert this condition because we
77     // want to exit cleanly if the signal does not abort our execution to let
78     // the parent easily know what happened.
79     std::exit(EXIT_SUCCESS);
80 }
81 
82 
83 }  // anonymous namespace
84 
85 
86 ATF_TEST_CASE_WITHOUT_HEAD(reset__ok);
87 ATF_TEST_CASE_BODY(reset__ok)
88 {
89     // TODO(jmmv): We should have a child type that inherits both stdout and
90     // stderr so that we do not have to specify files.
91     std::auto_ptr< process::child > child = process::child::fork_files(
92         program_reset_raise, fs::path("stdout.txt"), fs::path("stderr.txt"));
93     process::status status = child->wait();
94     ATF_REQUIRE(status.signaled());
95     ATF_REQUIRE_EQ(SIGUSR1, status.termsig());
96 }
97 
98 
99 ATF_TEST_CASE_WITHOUT_HEAD(reset__invalid);
100 ATF_TEST_CASE_BODY(reset__invalid)
101 {
102     ATF_REQUIRE_THROW(signals::system_error, signals::reset(-1));
103 }
104 
105 
106 ATF_INIT_TEST_CASES(tcs)
107 {
108     ATF_ADD_TEST_CASE(tcs, reset__ok);
109     ATF_ADD_TEST_CASE(tcs, reset__invalid);
110 }
111