1 // Copyright 2010 The Kyua Authors. 2 // All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are 6 // met: 7 // 8 // * Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // * Redistributions in binary form must reproduce the above copyright 11 // notice, this list of conditions and the following disclaimer in the 12 // documentation and/or other materials provided with the distribution. 13 // * Neither the name of Google Inc. nor the names of its contributors 14 // may be used to endorse or promote products derived from this software 15 // without specific prior written permission. 16 // 17 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 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/process/status.hpp" 44 #include "utils/signals/exceptions.hpp" 45 46 namespace fs = utils::fs; 47 namespace process = utils::process; 48 namespace signals = utils::signals; 49 50 51 namespace { 52 53 54 static void program_reset_raise(void) UTILS_NORETURN; 55 56 57 /// Body of a subprocess that tests the signals::reset function. 58 /// 59 /// This function programs a signal to be ignored, then uses signal::reset to 60 /// bring it back to its default handler and then delivers the signal to self. 61 /// The default behavior of the signal is for the process to die, so this 62 /// function should never return correctly (and thus the child process should 63 /// always die due to a signal if all goes well). 64 static void 65 program_reset_raise(void) 66 { 67 struct ::sigaction sa; 68 sa.sa_handler = SIG_IGN; 69 sigemptyset(&sa.sa_mask); 70 sa.sa_flags = 0; 71 if (::sigaction(SIGUSR1, &sa, NULL) == -1) 72 std::exit(EXIT_FAILURE); 73 74 signals::reset(SIGUSR1); 75 ::kill(::getpid(), SIGUSR1); 76 77 // Should not be reached, but we do not assert this condition because we 78 // want to exit cleanly if the signal does not abort our execution to let 79 // the parent easily know what happened. 80 std::exit(EXIT_SUCCESS); 81 } 82 83 84 /// Body of a subprocess that executes the signals::reset_all function. 85 /// 86 /// The process exits with success if the function worked, or with a failure if 87 /// an error is reported. No signals are tested. 88 static void 89 run_reset_all(void) 90 { 91 const bool ok = signals::reset_all(); 92 std::exit(ok ? EXIT_SUCCESS : EXIT_FAILURE); 93 } 94 95 96 } // anonymous namespace 97 98 99 ATF_TEST_CASE_WITHOUT_HEAD(reset__ok); 100 ATF_TEST_CASE_BODY(reset__ok) 101 { 102 std::auto_ptr< process::child > child = process::child::fork_files( 103 program_reset_raise, fs::path("/dev/stdout"), fs::path("/dev/stderr")); 104 process::status status = child->wait(); 105 ATF_REQUIRE(status.signaled()); 106 ATF_REQUIRE_EQ(SIGUSR1, status.termsig()); 107 } 108 109 110 ATF_TEST_CASE_WITHOUT_HEAD(reset__invalid); 111 ATF_TEST_CASE_BODY(reset__invalid) 112 { 113 ATF_REQUIRE_THROW(signals::system_error, signals::reset(-1)); 114 } 115 116 117 ATF_TEST_CASE_WITHOUT_HEAD(reset_all); 118 ATF_TEST_CASE_BODY(reset_all) 119 { 120 std::auto_ptr< process::child > child = process::child::fork_files( 121 run_reset_all, fs::path("/dev/stdout"), fs::path("/dev/stderr")); 122 process::status status = child->wait(); 123 ATF_REQUIRE(status.exited()); 124 ATF_REQUIRE_EQ(EXIT_SUCCESS, status.exitstatus()); 125 } 126 127 128 ATF_INIT_TEST_CASES(tcs) 129 { 130 ATF_ADD_TEST_CASE(tcs, reset__ok); 131 ATF_ADD_TEST_CASE(tcs, reset__invalid); 132 ATF_ADD_TEST_CASE(tcs, reset_all); 133 } 134