| Quellcodebibliothek Statistik Leitseite products/Sources/formale Sprachen/C/Android/bionic/bionic/tests/ (Android Betriebssystem Version 17©) Datei vom 26.5.2026 mit Größe 121 kB |
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Quelle stdio_test.cppSprache: C |
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/* * Copyright (C) 2012 The Android Open Source Project * * 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. */ #include <gtest/gtest.h> #include <errno.h> #include <fcntl.h> #include <limits.h> #include <locale.h> #include <math.h> #include <stdio.h> #include <sys/cdefs.h> #include <sys/socket.h> #include <sys/stat.h> #include <sys/sysinfo.h> #include <sys/types.h> #include <unistd.h> #include <wchar.h> #include <string> #include <thread> #include <vector> #include <android-base/file.h> #include <android-base/silent_death_test.h> #include <android-base/strings.h> #include <android-base/test_utils.h> #include <android-base/unique_fd.h> #include "android-base/stringprintf.h" #include "utils.h" // This #include is actually a test too. We have to duplicate the // definitions of the RENAME_ constants because <linux/fs.h> also contains // pollution such as BLOCK_SIZE which conflicts with lots of user code. // Important to check that we have matching definitions. // There's no _MAX to test that we have all the constants, sadly. #include <linux/fs.h> #if defined(NOFORTIFY) #define STDIO_TEST stdio_nofortify #define STDIO_DEATHTEST stdio_nofortify_DeathTest #else #define STDIO_TEST stdio #define STDIO_DEATHTEST stdio_DeathTest #endif using namespace std::string_literals; using stdio_DeathTest = SilentDeathTest; using stdio_nofortify_DeathTest = SilentDeathTest; static void SetFileTo(const char* path, const char* content) { FILE* fp; ASSERT_NE(nullptr, fp = fopen(path, "w")); ASSERT_NE(EOF, fputs(content, fp)); ASSERT_EQ(0, fclose(fp)); } static void AssertFileIs(const char* path, const char* expected) { FILE* fp; ASSERT_NE(nullptr, fp = fopen(path, "r")); char* line = nullptr; size_t length; ASSERT_NE(EOF, getline(&line, &length, fp)); ASSERT_EQ(0, fclose(fp)); ASSERT_STREQ(expected, line); free(line); } static void AssertFileIs(FILE* fp, const char* expected, bool is_fmemopen = false) { rewind(fp); char line[1024]; memset(line, 0xff, sizeof(line)); ASSERT_EQ(line, fgets(line, sizeof(line), fp)); ASSERT_STREQ(expected, line); if (is_fmemopen) { // fmemopen appends a trailing NUL byte, which probably shouldn't show up as an // extra empty line, but does on every C library I tested... ASSERT_EQ(line, fgets(line, sizeof(line), fp)); ASSERT_STREQ("", line); } // Make sure there isn't anything else in the file. ASSERT_EQ(nullptr, fgets(line, sizeof(line), fp)) << "junk at end of file: " << line; } #define EXPECT_SNPRINTF_N(expected, n, fmt, ...) \ { \ char buf[BUFSIZ]; \ int w = snprintf(buf, sizeof(buf), fmt __VA_OPT__(, ) __VA_ARGS__); \ EXPECT_EQ(n, w); \ EXPECT_STREQ(expected, buf); \ } #define EXPECT_SNPRINTF(expected, fmt, ...) \ EXPECT_SNPRINTF_N(expected, static_cast<int>(strlen(expected)), fmt __VA_OPT__(, ) __VA #define EXPECT_SWPRINTF_N(expected, n, fmt, ...) \ { \ wchar_t buf[BUFSIZ]; \ int w = swprintf(buf, sizeof(buf), fmt __VA_OPT__(, ) __VA_ARGS__); \ EXPECT_EQ(n, w); \ EXPECT_EQ(std::wstring(expected), std::wstring(buf, w)); \ } #define EXPECT_SWPRINTF(expected, fmt, ...) \ EXPECT_SWPRINTF_N(expected, static_cast<int>(wcslen(expected)), fmt __VA_OPT__(, ) __VA TEST(STDIO_TEST, flockfile_18208568_stderr) { flockfile(stderr); // Check that we're using a _recursive_ mutex for flockfile() by calling // something that will take the lock. ASSERT_EQ(0, feof(stderr)); funlockfile(stderr); } TEST(STDIO_TEST, flockfile_18208568_ftrylock) { // Same test but for ftrylockfile(). ASSERT_EQ(0, ftrylockfile(stderr)); ASSERT_EQ(0, feof(stderr)); funlockfile(stderr); } TEST(STDIO_TEST, flockfile_18208568_regular) { // We never had a bug for streams other than stdin/stdout/stderr, but test anyway. FILE* fp = fopen("/dev/null", "w"); ASSERT_TRUE(fp != nullptr); flockfile(fp); // Check that we're using a _recursive_ mutex for flockfile() by calling // something that will take the lock. ASSERT_EQ(0, feof(fp)); funlockfile(fp); fclose(fp); } TEST(STDIO_TEST, ftrylockfile) { FILE* fp = fopen("/dev/null", "w"); // If we lock it on this thread... ASSERT_EQ(0, ftrylockfile(fp)); std::thread([=] { // ...we can't lock it on another thread. ASSERT_EQ(EBUSY, ftrylockfile(fp)); }).join(); fclose(fp); } TEST(STDIO_TEST, tmpfile_fileno_fprintf_rewind_fgets) { FILE* fp = tmpfile(); ASSERT_TRUE(fp != nullptr); int fd = fileno(fp); ASSERT_NE(fd, -1); struct stat sb; int rc = fstat(fd, &sb); ASSERT_NE(rc, -1); ASSERT_EQ(sb.st_mode & 0777, 0600U); rc = fprintf(fp, "hello\n"); ASSERT_EQ(rc, 6); AssertFileIs(fp, "hello\n"); fclose(fp); } TEST(STDIO_TEST, tmpfile64) { FILE* fp = tmpfile64(); ASSERT_TRUE(fp != nullptr); fclose(fp); } TEST(STDIO_TEST, tmpfile_TMPDIR) { TemporaryDir td; setenv("TMPDIR", td.path, 1); FILE* fp = tmpfile(); ASSERT_TRUE(fp != nullptr); std::string fd_path = android::base::StringPrintf("/proc/self/fd/%d", fileno(fp)); char path[PATH_MAX]; ASSERT_GT(readlink(fd_path.c_str(), path, sizeof(path)), 0); // $TMPDIR influenced where our temporary file ended up? ASSERT_TRUE(android::base::StartsWith(path, td.path)) << path; // And we used O_TMPFILE, right? ASSERT_TRUE(android::base::EndsWith(path, " (deleted)")) << path; } TEST(STDIO_TEST, dprintf) { TemporaryFile tf; int rc = dprintf(tf.fd, "hello\n"); ASSERT_EQ(rc, 6); lseek(tf.fd, 0, SEEK_SET); FILE* tfile = fdopen(tf.fd, "r"); ASSERT_TRUE(tfile != nullptr); AssertFileIs(tfile, "hello\n"); fclose(tfile); } TEST(STDIO_TEST, getdelim) { FILE* fp = tmpfile(); ASSERT_TRUE(fp != nullptr); const char* line_written = "This is a test"; int rc = fprintf(fp, "%s", line_written); ASSERT_EQ(rc, static_cast<int>(strlen(line_written))); rewind(fp); char* word_read = nullptr; size_t allocated_length = 0; const char* expected[] = { "This ", " ", "is ", "a ", "test" }; for (size_t i = 0; i < 5; ++i) { ASSERT_FALSE(feof(fp)); ASSERT_EQ(getdelim(&word_read, &allocated_length, ' ', fp), static_cast<int>(strlen(expected[i]))); ASSERT_GE(allocated_length, strlen(expected[i])); ASSERT_STREQ(expected[i], word_read); } // The last read should have set the end-of-file indicator for the stream. ASSERT_TRUE(feof(fp)); clearerr(fp); // getdelim returns -1 but doesn't set errno if we're already at EOF. // It should set the end-of-file indicator for the stream, though. ASSERT_ERRNO_FAILURE(0, -1, getdelim(&word_read, &allocated_length, ' ', fp)); ASSERT_TRUE(feof(fp)); free(word_read); fclose(fp); } TEST(STDIO_TEST, getdelim_invalid) { #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wnonnull" FILE* fp = tmpfile(); ASSERT_TRUE(fp != nullptr); char* buffer = nullptr; size_t buffer_length = 0; // The first argument can't be NULL. ASSERT_ERRNO_FAILURE(EINVAL, -1, getdelim(nullptr, &buffer_length, ' ', fp)); // The second argument can't be NULL. ASSERT_ERRNO_FAILURE(EINVAL, -1, getdelim(&buffer, nullptr, ' ', fp)); fclose(fp); #pragma clang diagnostic pop } TEST(STDIO_TEST, getdelim_directory) { FILE* fp = fopen("/proc", "r"); ASSERT_TRUE(fp != nullptr); char* word_read; size_t allocated_length; ASSERT_EQ(-1, getdelim(&word_read, &allocated_length, ' ', fp)); fclose(fp); } // https://sourceware.org/bugzilla/show_bug.cgi?id=28038 TEST(STDIO_TEST, getdelim_eof_terminator) { FILE* fp = tmpfile(); ASSERT_TRUE(fp != nullptr); char* line = static_cast<char*>(malloc(1)); size_t allocated_length = 1; *line = 'x'; ASSERT_EQ(-1, getdelim(&line, &allocated_length, '\n', fp)); EXPECT_GT(allocated_length, 0u); EXPECT_EQ('\0', line[0]); fclose(fp); free(line); } TEST(STDIO_TEST, fgetln) { #if !defined(__GLIBC__) FILE* fp = tmpfile(); ASSERT_TRUE(fp != nullptr); std::vector<std::string> lines; for (size_t i = 0; i < 5; ++i) { lines.push_back(android::base::StringPrintf("This is test line %zu for fgetln()\n", i)) } for (size_t i = 0; i < lines.size(); ++i) { int rc = fprintf(fp, "%s", lines[i].c_str()); ASSERT_EQ(rc, static_cast<int>(lines[i].size())); } rewind(fp); size_t i = 0; char* line = nullptr; size_t line_length; while ((line = fgetln(fp, &line_length)) != nullptr) { ASSERT_EQ(line_length, lines[i].size()); // "lines" aren't necessarily NUL-terminated, so we need to use memcmp(). ASSERT_EQ(0, memcmp(lines[i].c_str(), line, line_length)); ++i; } ASSERT_EQ(i, lines.size()); // The last read should have set the end-of-file indicator for the stream. ASSERT_TRUE(feof(fp)); clearerr(fp); // fgetln() returns nullptr but doesn't set errno if we're already at EOF. // It should set the end-of-file indicator for the stream, though. ASSERT_ERRNO_FAILURE(0, nullptr, fgetln(fp, &line_length)); ASSERT_TRUE(feof(fp)); fclose(fp); #else GTEST_SKIP() << "no fgetln() in glibc"; #endif } TEST(STDIO_TEST, getline) { FILE* fp = tmpfile(); ASSERT_TRUE(fp != nullptr); std::vector<std::string> lines; for (size_t i = 0; i < 5; ++i) { lines.push_back(android::base::StringPrintf("This is test line %zu for getline()\n", i) } for (size_t i = 0; i < lines.size(); ++i) { int rc = fprintf(fp, "%s", lines[i].c_str()); ASSERT_EQ(rc, static_cast<int>(lines[i].size())); } rewind(fp); char* line_read = nullptr; size_t allocated_length = 0; size_t i = 0; ssize_t read_char_count; while ((read_char_count = getline(&line_read, &allocated_length, fp)) != -1) { ASSERT_EQ(read_char_count, static_cast<int>(lines[i].size())); ASSERT_GE(allocated_length, lines[i].size()); ASSERT_EQ(lines[i], line_read); ++i; } ASSERT_EQ(i, lines.size()); // The last read should have set the end-of-file indicator for the stream. ASSERT_TRUE(feof(fp)); clearerr(fp); // getline returns -1 but doesn't set errno if we're already at EOF. // It should set the end-of-file indicator for the stream, though. ASSERT_ERRNO_FAILURE(0, -1, getline(&line_read, &allocated_length, fp)); ASSERT_TRUE(feof(fp)); free(line_read); fclose(fp); } TEST(STDIO_TEST, getline_invalid) { #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wnonnull" FILE* fp = tmpfile(); ASSERT_TRUE(fp != nullptr); char* buffer = nullptr; size_t buffer_length = 0; // The first argument can't be NULL. ASSERT_ERRNO_FAILURE(EINVAL, -1, getline(nullptr, &buffer_length, fp)); // The second argument can't be NULL. ASSERT_ERRNO_FAILURE(EINVAL, -1, getline(&buffer, nullptr, fp)); fclose(fp); #pragma clang diagnostic pop } TEST(STDIO_TEST, printf_ssize_t) { // http://b/8253769 ASSERT_EQ(sizeof(ssize_t), sizeof(long int)); ASSERT_EQ(sizeof(ssize_t), sizeof(size_t)); // For our 32-bit ABI, we had a ssize_t definition that confuses GCC into saying: // error: format '%zd' expects argument of type 'signed size_t', // but argument 4 has type 'ssize_t {aka long int}' [-Werror=format] ssize_t v = 1; EXPECT_SNPRINTF("1", "%zd", v); EXPECT_SWPRINTF(L"1", L"%zd", v); } // https://code.google.com/p/android/issues/detail?id=64886 TEST(STDIO_TEST, snprintf_a) { EXPECT_SNPRINTF("<0x1.3831e147ae148p+13>", "<%a>", 9990.235); } // https://code.google.com/p/android/issues/detail?id=64886 TEST(STDIO_TEST, swprintf_a) { EXPECT_SWPRINTF(L"<0x1.3831e147ae148p+13>", L"<%a>", 9990.235); } // http://b/152588929 TEST(STDIO_TEST, snprintf_La) { #if defined(__LP64__) union { uint64_t a[2]; long double v; } u; u.a[0] = UINT64_C(0x9b9b9b9b9b9b9b9b); u.a[1] = UINT64_C(0xdfdfdfdfdfdfdfdf); EXPECT_SNPRINTF("<-0x1.dfdfdfdfdfdf9b9b9b9b9b9b9b9bp+8160>", "<%La>", u.v); u.a[0] = UINT64_C(0xffffffffffffffff); u.a[1] = UINT64_C(0x7ffeffffffffffff); EXPECT_SNPRINTF("<0x1.ffffffffffffffffffffffffffffp+16383>", "<%La>", u.v); u.a[0] = UINT64_C(0x0000000000000000); u.a[1] = UINT64_C(0x0000000000000000); EXPECT_SNPRINTF("<0x0p+0>", "<%La>", u.v); #else GTEST_SKIP() << "no ld128"; #endif } // http://b/152588929 TEST(STDIO_TEST, swprintf_La) { #if defined(__LP64__) union { uint64_t a[2]; long double v; } u; u.a[0] = UINT64_C(0x9b9b9b9b9b9b9b9b); u.a[1] = UINT64_C(0xdfdfdfdfdfdfdfdf); EXPECT_SWPRINTF(L"<-0x1.dfdfdfdfdfdf9b9b9b9b9b9b9b9bp+8160>", L"<%La>", u.v); u.a[0] = UINT64_C(0xffffffffffffffff); u.a[1] = UINT64_C(0x7ffeffffffffffff); EXPECT_SWPRINTF(L"<0x1.ffffffffffffffffffffffffffffp+16383>", L"<%La>", u.v); u.a[0] = UINT64_C(0x0000000000000000); u.a[1] = UINT64_C(0x0000000000000000); EXPECT_SWPRINTF(L"<0x0p+0>", L"<%La>", u.v); #else GTEST_SKIP() << "no ld128"; #endif } TEST(STDIO_TEST, snprintf_lc) { wint_t wc = L'a'; EXPECT_SNPRINTF("<a>", "<%lc>", wc); } TEST(STDIO_TEST, swprintf_lc) { wint_t wc = L'a'; EXPECT_SWPRINTF(L"<a>", L"<%lc>", wc); } TEST(STDIO_TEST, snprintf_C) { // Synonym for %lc. wchar_t wc = L'a'; EXPECT_SNPRINTF("<a>", "<%C>", wc); } TEST(STDIO_TEST, swprintf_C) { // Synonym for %lc. wchar_t wc = L'a'; EXPECT_SWPRINTF(L"<a>", L"<%C>", wc); } TEST(STDIO_TEST, snprintf_ls_null) { EXPECT_SNPRINTF("<(null)>", "<%ls>", static_cast<wchar_t*>(nullptr)); } TEST(STDIO_TEST, swprintf_ls_null) { EXPECT_SWPRINTF(L"<(null)>", L"<%ls>", static_cast<wchar_t*>(nullptr)); } TEST(STDIO_TEST, snprintf_ls) { static const wchar_t chars[] = L"Hello\u0666 World"; EXPECT_SNPRINTF("<Hello\xd9\xa6 World>", "<%ls>", chars); } TEST(STDIO_TEST, swprintf_ls) { static const wchar_t chars[] = L"Hello\u0666 World"; EXPECT_SWPRINTF(L"<Hello\u0666 World>", L"<%ls>", chars); } TEST(STDIO_TEST, snprintf_S_nullptr) { // Synonym for %ls. EXPECT_SNPRINTF("<(null)>", "<%S>", static_cast<wchar_t*>(nullptr)); } TEST(STDIO_TEST, swprintf_S_nullptr) { // Synonym for %ls. EXPECT_SWPRINTF(L"<(null)>", L"<%S>", static_cast<wchar_t*>(nullptr)); } TEST(STDIO_TEST, snprintf_S) { // Synonym for %ls. static const wchar_t chars[] = L"Hello\u0666 World"; EXPECT_SNPRINTF("<Hello\xd9\xa6 World>", "<%S>", chars); } TEST(STDIO_TEST, swprintf_S) { // Synonym for %ls. static const wchar_t chars[] = L"Hello\u0666 World"; EXPECT_SWPRINTF(L"<Hello\u0666 World>", L"<%S>", chars); } TEST_F(STDIO_DEATHTEST, snprintf_n) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat" // http://b/14492135 and http://b/31832608. char buf[32]; int i = 1234; EXPECT_EXIT(snprintf(buf, sizeof(buf), "a %n b", &i), testing::KilledBySignal(SIGABRT), "%n not allowed on Android"); #pragma clang diagnostic pop #else GTEST_SKIP() << "glibc does allow %n"; #endif } TEST_F(STDIO_DEATHTEST, swprintf_n) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat" // http://b/14492135 and http://b/31832608. wchar_t buf[32]; int i = 1234; EXPECT_EXIT(swprintf(buf, sizeof(buf), L"a %n b", &i), testing::KilledBySignal(SIGABRT), "%n not allowed on Android"); #pragma clang diagnostic pop #else GTEST_SKIP() << "glibc does allow %n"; #endif } TEST(STDIO_TEST, snprintf_measure) { char buf[1] = {'x'}; ASSERT_EQ(11, snprintf(buf, 0, "Hello %s", "world")); ASSERT_EQ('x', buf[0]); } // Unlike snprintf(), you *can't* use swprintf() to measure. TEST(STDIO_TEST, swprintf_measure) { wchar_t buf[1] = {L'x'}; ASSERT_EQ(-1, swprintf(buf, 0, L"Hello %S", L"world")); ASSERT_EQ(L'x', buf[0]); } // Check snprintf does not overrun buffer when output exceeds specified size TEST(STDIO_TEST, snprintf_no_overrun) { char buf[10] = "123456789"; int w = snprintf(buf, 4, "a%ib", 12345678); EXPECT_EQ(10, w); EXPECT_STREQ("a12", buf); EXPECT_STREQ("56789", &buf[4]); } // Check swprintf does not overrun buffer when output exceeds specified size TEST(STDIO_TEST, swprintf_no_overrun) { wchar_t buf[10] = L"123456789"; int w = swprintf(buf, 4, L"a%ib", 12345678); EXPECT_EQ(-1, w); EXPECT_STREQ(L"a12", buf); EXPECT_STREQ(L"56789", &buf[4]); } TEST(STDIO_TEST, snprintf_smoke) { EXPECT_SNPRINTF("a", "a"); EXPECT_SNPRINTF("%", "%%"); EXPECT_SNPRINTF("01234", "01234"); EXPECT_SNPRINTF("a01234b", "a%sb", "01234"); EXPECT_SNPRINTF("a(null)b", "a%sb", static_cast<char*>(nullptr)); EXPECT_SNPRINTF("aabbcc", "aa%scc", "bb"); EXPECT_SNPRINTF("abc", "a%cc", 'b'); EXPECT_SNPRINTF("a1234b", "a%db", 1234); EXPECT_SNPRINTF("a-8123b", "a%db", -8123); EXPECT_SNPRINTF("a16b", "a%hdb", static_cast<short>(0x7fff0010)); EXPECT_SNPRINTF("a16b", "a%hhdb", static_cast<char>(0x7fffff10)); EXPECT_SNPRINTF("a68719476736b", "a%lldb", 0x1000000000LL); EXPECT_SNPRINTF("a70000b", "a%ldb", 70000L); EXPECT_SNPRINTF("a0xb0001234b", "a%pb", reinterpret_cast<void*>(0xb0001234)); EXPECT_SNPRINTF("a12abz", "a%xz", 0x12ab); EXPECT_SNPRINTF("a12ABz", "a%Xz", 0x12ab); EXPECT_SNPRINTF("a00123456z", "a%08xz", 0x123456); EXPECT_SNPRINTF("a 1234z", "a%5dz", 1234); EXPECT_SNPRINTF("a01234z", "a%05dz", 1234); EXPECT_SNPRINTF("a 1234z", "a%8dz", 1234); EXPECT_SNPRINTF("a1234 z", "a%-8dz", 1234); EXPECT_SNPRINTF("Aabcdef Z", "A%-11sZ", "abcdef"); EXPECT_SNPRINTF("Ahello:1234Z", "A%s:%dZ", "hello", 1234); EXPECT_SNPRINTF("a005:5:05z", "a%03d:%d:%02dz", 5, 5, 5); #if defined(__BIONIC__) EXPECT_SNPRINTF("a5,0x0z", "a%d,%pz", 5, static_cast<void*>(nullptr)); #else // __BIONIC__ EXPECT_SNPRINTF("a5,(nil)z", "a%d,%pz", 5, static_cast<void*>(nullptr)); #endif // __BIONIC__ EXPECT_SNPRINTF("a68719476736,6,7,8z", "a%lld,%d,%d,%dz", 0x1000000000LL, 6, 7, 8); EXPECT_SNPRINTF("a_1.230000_b", "a_%f_b", 1.23f); EXPECT_SNPRINTF("a_3.14_b", "a_%g_b", 3.14); EXPECT_SNPRINTF("print_me_twice print_me_twice", "%1$s %1$s", "print_me_twice"); } TEST(STDIO_TEST, swprintf_smoke) { EXPECT_SWPRINTF(L"a", L"a"); EXPECT_SWPRINTF(L"%", L"%%"); EXPECT_SWPRINTF(L"01234", L"01234"); EXPECT_SWPRINTF(L"a01234b", L"a%sb", "01234"); EXPECT_SWPRINTF(L"a(null)b", L"a%sb", static_cast<char*>(nullptr)); EXPECT_SWPRINTF(L"aabbcc", L"aa%scc", "bb"); EXPECT_SWPRINTF(L"abc", L"a%cc", 'b'); EXPECT_SWPRINTF(L"a1234b", L"a%db", 1234); EXPECT_SWPRINTF(L"a-8123b", L"a%db", -8123); EXPECT_SWPRINTF(L"a16b", L"a%hdb", static_cast<short>(0x7fff0010)); EXPECT_SWPRINTF(L"a16b", L"a%hhdb", static_cast<char>(0x7fffff10)); EXPECT_SWPRINTF(L"a68719476736b", L"a%lldb", 0x1000000000LL); EXPECT_SWPRINTF(L"a70000b", L"a%ldb", 70000L); EXPECT_SWPRINTF(L"a0xb0001234b", L"a%pb", reinterpret_cast<void*>(0xb0001234)); EXPECT_SWPRINTF(L"a12abz", L"a%xz", 0x12ab); EXPECT_SWPRINTF(L"a12ABz", L"a%Xz", 0x12ab); EXPECT_SWPRINTF(L"a00123456z", L"a%08xz", 0x123456); EXPECT_SWPRINTF(L"a 1234z", L"a%5dz", 1234); EXPECT_SWPRINTF(L"a01234z", L"a%05dz", 1234); EXPECT_SWPRINTF(L"a 1234z", L"a%8dz", 1234); EXPECT_SWPRINTF(L"a1234 z", L"a%-8dz", 1234); EXPECT_SWPRINTF(L"Aabcdef Z", L"A%-11sZ", "abcdef"); EXPECT_SWPRINTF(L"Ahello:1234Z", L"A%s:%dZ", "hello", 1234); EXPECT_SWPRINTF(L"a005:5:05z", L"a%03d:%d:%02dz", 5, 5, 5); #if defined(__BIONIC__) EXPECT_SWPRINTF(L"a5,0x0z", L"a%d,%pz", 5, static_cast<void*>(nullptr)); #else // __BIONIC__ EXPECT_SWPRINTF(L"a5,(nil)z", L"a%d,%pz", 5, static_cast<void*>(nullptr)); #endif // __BIONIC__ EXPECT_SWPRINTF(L"a68719476736,6,7,8z", L"a%lld,%d,%d,%dz", 0x1000000000LL, 6, 7, 8); EXPECT_SWPRINTF(L"a_1.230000_b", L"a_%f_b", 1.23f); EXPECT_SWPRINTF(L"a_3.14_b", L"a_%g_b", 3.14); EXPECT_SWPRINTF(L"print_me_twice print_me_twice", L"%1$s %1$s", "print_me_twice"); } template <typename T> static void CheckInfNan(int snprintf_fn(T*, size_t, const T*, ...), int sscanf_fn(const T*, const T*, ...), const T* fmt_string, const T* fmt, const T* fmt_plus, const T* minus_inf, const T* inf_, const T* plus_inf, const T* minus_nan, const T* nan_, const T* plus_nan) { T buf[BUFSIZ]; float f; // NaN. snprintf_fn(buf, sizeof(buf), fmt, nan("")); EXPECT_STREQ(nan_, buf) << fmt; EXPECT_EQ(1, sscanf_fn(buf, fmt, &f)); EXPECT_TRUE(isnan(f)); snprintf_fn(buf, sizeof(buf), fmt, -nan("")); EXPECT_STREQ(minus_nan, buf) << fmt; EXPECT_EQ(1, sscanf_fn(buf, fmt, &f)); EXPECT_TRUE(isnan(f)); snprintf_fn(buf, sizeof(buf), fmt_plus, nan("")); EXPECT_STREQ(plus_nan, buf) << fmt_plus; EXPECT_EQ(1, sscanf_fn(buf, fmt, &f)); EXPECT_TRUE(isnan(f)); snprintf_fn(buf, sizeof(buf), fmt_plus, -nan("")); EXPECT_STREQ(minus_nan, buf) << fmt_plus; EXPECT_EQ(1, sscanf_fn(buf, fmt, &f)); EXPECT_TRUE(isnan(f)); // Inf. snprintf_fn(buf, sizeof(buf), fmt, HUGE_VALF); EXPECT_STREQ(inf_, buf) << fmt; EXPECT_EQ(1, sscanf_fn(buf, fmt, &f)); EXPECT_EQ(HUGE_VALF, f); snprintf_fn(buf, sizeof(buf), fmt, -HUGE_VALF); EXPECT_STREQ(minus_inf, buf) << fmt; EXPECT_EQ(1, sscanf_fn(buf, fmt, &f)); EXPECT_EQ(-HUGE_VALF, f); snprintf_fn(buf, sizeof(buf), fmt_plus, HUGE_VALF); EXPECT_STREQ(plus_inf, buf) << fmt_plus; EXPECT_EQ(1, sscanf_fn(buf, fmt, &f)); EXPECT_EQ(HUGE_VALF, f); snprintf_fn(buf, sizeof(buf), fmt_plus, -HUGE_VALF); EXPECT_STREQ(minus_inf, buf) << fmt_plus; EXPECT_EQ(1, sscanf_fn(buf, fmt, &f)); EXPECT_EQ(-HUGE_VALF, f); // Check case-insensitivity. snprintf_fn(buf, sizeof(buf), fmt_string, "[InFiNiTy]"); EXPECT_EQ(1, sscanf_fn(buf, fmt, &f)) << buf; EXPECT_EQ(HUGE_VALF, f); snprintf_fn(buf, sizeof(buf), fmt_string, "[NaN]"); EXPECT_EQ(1, sscanf_fn(buf, fmt, &f)) << buf; EXPECT_TRUE(isnan(f)); } TEST(STDIO_TEST, snprintf_sscanf_inf_nan) { CheckInfNan(snprintf, sscanf, "%s", "[%a]", "[%+a]", "[-inf]", "[inf]", "[+inf]", "[-nan]", "[nan]", "[+nan]"); CheckInfNan(snprintf, sscanf, "%s", "[%A]", "[%+A]", "[-INF]", "[INF]", "[+INF]", "[-NAN]", "[NAN]", "[+NAN]"); CheckInfNan(snprintf, sscanf, "%s", "[%e]", "[%+e]", "[-inf]", "[inf]", "[+inf]", "[-nan]", "[nan]", "[+nan]"); CheckInfNan(snprintf, sscanf, "%s", "[%E]", "[%+E]", "[-INF]", "[INF]", "[+INF]", "[-NAN]", "[NAN]", "[+NAN]"); CheckInfNan(snprintf, sscanf, "%s", "[%f]", "[%+f]", "[-inf]", "[inf]", "[+inf]", "[-nan]", "[nan]", "[+nan]"); CheckInfNan(snprintf, sscanf, "%s", "[%F]", "[%+F]", "[-INF]", "[INF]", "[+INF]", "[-NAN]", "[NAN]", "[+NAN]"); CheckInfNan(snprintf, sscanf, "%s", "[%g]", "[%+g]", "[-inf]", "[inf]", "[+inf]", "[-nan]", "[nan]", "[+nan]"); CheckInfNan(snprintf, sscanf, "%s", "[%G]", "[%+G]", "[-INF]", "[INF]", "[+INF]", "[-NAN]", "[NAN]", "[+NAN]"); } TEST(STDIO_TEST, swprintf_swscanf_inf_nan) { CheckInfNan(swprintf, swscanf, L"%s", L"[%a]", L"[%+a]", L"[-inf]", L"[inf]", L"[+inf]", L"[-nan]", L"[nan]", L"[+nan]"); CheckInfNan(swprintf, swscanf, L"%s", L"[%A]", L"[%+A]", L"[-INF]", L"[INF]", L"[+INF]", L"[-NAN]", L"[NAN]", L"[+NAN]"); CheckInfNan(swprintf, swscanf, L"%s", L"[%e]", L"[%+e]", L"[-inf]", L"[inf]", L"[+inf]", L"[-nan]", L"[nan]", L"[+nan]"); CheckInfNan(swprintf, swscanf, L"%s", L"[%E]", L"[%+E]", L"[-INF]", L"[INF]", L"[+INF]", L"[-NAN]", L"[NAN]", L"[+NAN]"); CheckInfNan(swprintf, swscanf, L"%s", L"[%f]", L"[%+f]", L"[-inf]", L"[inf]", L"[+inf]", L"[-nan]", L"[nan]", L"[+nan]"); CheckInfNan(swprintf, swscanf, L"%s", L"[%F]", L"[%+F]", L"[-INF]", L"[INF]", L"[+INF]", L"[-NAN]", L"[NAN]", L"[+NAN]"); CheckInfNan(swprintf, swscanf, L"%s", L"[%g]", L"[%+g]", L"[-inf]", L"[inf]", L"[+inf]", L"[-nan]", L"[nan]", L"[+nan]"); CheckInfNan(swprintf, swscanf, L"%s", L"[%G]", L"[%+G]", L"[-INF]", L"[INF]", L"[+INF]", L"[-NAN]", L"[NAN]", L"[+NAN]"); } TEST(STDIO_TEST, snprintf_jd_INTMAX_MAX) { EXPECT_SNPRINTF("9223372036854775807", "%jd", INTMAX_MAX); } TEST(STDIO_TEST, swprintf_jd_INTMAX_MAX) { EXPECT_SWPRINTF(L"9223372036854775807", L"%jd", INTMAX_MAX); } TEST(STDIO_TEST, snprintf_jd_INTMAX_MIN) { EXPECT_SNPRINTF("-9223372036854775808", "%jd", INTMAX_MIN); } TEST(STDIO_TEST, swprintf_jd_INTMAX_MIN) { EXPECT_SWPRINTF(L"-9223372036854775808", L"%jd", INTMAX_MIN); } TEST(STDIO_TEST, snprintf_ju_UINTMAX_MAX) { EXPECT_SNPRINTF("18446744073709551615", "%ju", UINTMAX_MAX); } TEST(STDIO_TEST, swprintf_ju_UINTMAX_MAX) { EXPECT_SWPRINTF(L"18446744073709551615", L"%ju", UINTMAX_MAX); } TEST(STDIO_TEST, snprintf_1$ju_UINTMAX_MAX) { EXPECT_SNPRINTF("18446744073709551615", "%1$ju", UINTMAX_MAX); } TEST(STDIO_TEST, swprintf_1$ju_UINTMAX_MAX) { EXPECT_SWPRINTF(L"18446744073709551615", L"%1$ju", UINTMAX_MAX); } TEST(STDIO_TEST, snprintf_d_ZERO) { EXPECT_SNPRINTF("0", "%d", 0); } TEST(STDIO_TEST, swprintf_d_ZERO) { EXPECT_SWPRINTF(L"0", L"%d", 0); } TEST(STDIO_TEST, snprintf_d_INT_MAX) { EXPECT_SNPRINTF("2147483647", "%d", INT_MAX); } TEST(STDIO_TEST, swprintf_d_INT_MAX) { EXPECT_SWPRINTF(L"2147483647", L"%d", INT_MAX); } TEST(STDIO_TEST, snprintf_d_INT_MIN) { EXPECT_SNPRINTF("-2147483648", "%d", INT_MIN); } TEST(STDIO_TEST, swprintf_d_INT_MIN) { EXPECT_SWPRINTF(L"-2147483648", L"%d", INT_MIN); } TEST(STDIO_TEST, snprintf_ld_LONG_MAX) { #if defined(__LP64__) EXPECT_SNPRINTF("9223372036854775807", "%ld", LONG_MAX); #else EXPECT_SNPRINTF("2147483647", "%ld", LONG_MAX); #endif } TEST(STDIO_TEST, swprintf_ld_LONG_MAX) { #if defined(__LP64__) EXPECT_SWPRINTF(L"9223372036854775807", L"%ld", LONG_MAX); #else EXPECT_SWPRINTF(L"2147483647", L"%ld", LONG_MAX); #endif } TEST(STDIO_TEST, snprintf_ld_LONG_MIN) { #if defined(__LP64__) EXPECT_SNPRINTF("-9223372036854775808", "%ld", LONG_MIN); #else EXPECT_SNPRINTF("-2147483648", "%ld", LONG_MIN); #endif } TEST(STDIO_TEST, swprintf_ld_LONG_MIN) { #if defined(__LP64__) EXPECT_SWPRINTF(L"-9223372036854775808", L"%ld", LONG_MIN); #else EXPECT_SWPRINTF(L"-2147483648", L"%ld", LONG_MIN); #endif } TEST(STDIO_TEST, snprintf_lld_LLONG_MAX) { EXPECT_SNPRINTF("9223372036854775807", "%lld", LLONG_MAX); } TEST(STDIO_TEST, swprintf_lld_LLONG_MAX) { EXPECT_SWPRINTF(L"9223372036854775807", L"%lld", LLONG_MAX); } TEST(STDIO_TEST, snprintf_lld_LLONG_MIN) { EXPECT_SNPRINTF("-9223372036854775808", "%lld", LLONG_MIN); } TEST(STDIO_TEST, swprintf_lld_LLONG_MIN) { EXPECT_SWPRINTF(L"-9223372036854775808", L"%lld", LLONG_MIN); } TEST(STDIO_TEST, snprintf_o_ZERO) { EXPECT_SNPRINTF("0", "%o", 0); } TEST(STDIO_TEST, swprintf_o_ZERO) { EXPECT_SWPRINTF(L"0", L"%o", 0); } TEST(STDIO_TEST, snprintf_o_UINT_MAX) { EXPECT_SNPRINTF("37777777777", "%o", UINT_MAX); } TEST(STDIO_TEST, swprintf_o_UINT_MAX) { EXPECT_SWPRINTF(L"37777777777", L"%o", UINT_MAX); } TEST(STDIO_TEST, snprintf_o_ULONG_MAX) { #if defined(__LP64__) EXPECT_SNPRINTF("1777777777777777777777", "%lo", ULONG_MAX); #else EXPECT_SNPRINTF("37777777777", "%lo", ULONG_MAX); #endif } TEST(STDIO_TEST, swprintf_o_ULONG_MAX) { #if defined(__LP64__) EXPECT_SWPRINTF(L"1777777777777777777777", L"%lo", ULONG_MAX); #else EXPECT_SWPRINTF(L"37777777777", L"%lo", ULONG_MAX); #endif } TEST(STDIO_TEST, snprintf_o_ULLONG_MAX) { EXPECT_SNPRINTF("1777777777777777777777", "%llo", ULLONG_MAX); } TEST(STDIO_TEST, swprintf_o_ULLONG_MAX) { EXPECT_SWPRINTF(L"1777777777777777777777", L"%llo", ULLONG_MAX); } TEST(STDIO_TEST, snprintf_u_ZERO) { EXPECT_SNPRINTF("0", "%u", 0); } TEST(STDIO_TEST, swprintf_u_ZERO) { EXPECT_SWPRINTF(L"0", L"%u", 0); } TEST(STDIO_TEST, snprintf_u_UINT_MAX) { EXPECT_SNPRINTF("4294967295", "%u", UINT_MAX); } TEST(STDIO_TEST, swprintf_u_UINT_MAX) { EXPECT_SWPRINTF(L"4294967295", L"%u", UINT_MAX); } TEST(STDIO_TEST, snprintf_u_ULONG_MAX) { #if defined(__LP64__) EXPECT_SNPRINTF("18446744073709551615", "%lu", ULONG_MAX); #else EXPECT_SNPRINTF("4294967295", "%lu", ULONG_MAX); #endif } TEST(STDIO_TEST, swprintf_u_ULONG_MAX) { #if defined(__LP64__) EXPECT_SWPRINTF(L"18446744073709551615", L"%lu", ULONG_MAX); #else EXPECT_SWPRINTF(L"4294967295", L"%lu", ULONG_MAX); #endif } TEST(STDIO_TEST, snprintf_u_ULLONG_MAX) { EXPECT_SNPRINTF("18446744073709551615", "%llu", ULLONG_MAX); } TEST(STDIO_TEST, swprintf_u_ULLONG_MAX) { EXPECT_SWPRINTF(L"18446744073709551615", L"%llu", ULLONG_MAX); } TEST(STDIO_TEST, snprintf_x_ZERO) { EXPECT_SNPRINTF("0", "%x", 0); } TEST(STDIO_TEST, swprintf_x_ZERO) { EXPECT_SWPRINTF(L"0", L"%x", 0); } TEST(STDIO_TEST, snprintf_x_UINT_MAX) { EXPECT_SNPRINTF("ffffffff", "%x", UINT_MAX); } TEST(STDIO_TEST, swprintf_x_UINT_MAX) { EXPECT_SWPRINTF(L"ffffffff", L"%x", UINT_MAX); } TEST(STDIO_TEST, snprintf_x_ULONG_MAX) { #if defined(__LP64__) EXPECT_SNPRINTF("ffffffffffffffff", "%lx", ULONG_MAX); #else EXPECT_SNPRINTF("ffffffff", "%lx", ULONG_MAX); #endif } TEST(STDIO_TEST, swprintf_x_ULONG_MAX) { #if defined(__LP64__) EXPECT_SWPRINTF(L"ffffffffffffffff", L"%lx", ULONG_MAX); #else EXPECT_SWPRINTF(L"ffffffff", L"%lx", ULONG_MAX); #endif } TEST(STDIO_TEST, snprintf_x_ULLONG_MAX) { EXPECT_SNPRINTF("ffffffffffffffff", "%llx", ULLONG_MAX); } TEST(STDIO_TEST, swprintf_x_ULLONG_MAX) { EXPECT_SWPRINTF(L"ffffffffffffffff", L"%llx", ULLONG_MAX); } TEST(STDIO_TEST, snprintf_X_ZERO) { EXPECT_SNPRINTF("0", "%X", 0); } TEST(STDIO_TEST, swprintf_X_ZERO) { EXPECT_SWPRINTF(L"0", L"%X", 0); } TEST(STDIO_TEST, snprintf_X_UINT_MAX) { EXPECT_SNPRINTF("FFFFFFFF", "%X", UINT_MAX); } TEST(STDIO_TEST, swprintf_X_UINT_MAX) { EXPECT_SWPRINTF(L"FFFFFFFF", L"%X", UINT_MAX); } TEST(STDIO_TEST, snprintf_X_ULONG_MAX) { #if defined(__LP64__) EXPECT_SNPRINTF("FFFFFFFFFFFFFFFF", "%lX", ULONG_MAX); #else EXPECT_SNPRINTF("FFFFFFFF", "%lX", ULONG_MAX); #endif } TEST(STDIO_TEST, swprintf_X_ULONG_MAX) { #if defined(__LP64__) EXPECT_SWPRINTF(L"FFFFFFFFFFFFFFFF", L"%lX", ULONG_MAX); #else EXPECT_SWPRINTF(L"FFFFFFFF", L"%lX", ULONG_MAX); #endif } TEST(STDIO_TEST, snprintf_X_ULLONG_MAX) { EXPECT_SNPRINTF("FFFFFFFFFFFFFFFF", "%llX", ULLONG_MAX); } TEST(STDIO_TEST, swprintf_X_ULLONG_MAX) { EXPECT_SWPRINTF(L"FFFFFFFFFFFFFFFF", L"%llX", ULLONG_MAX); } TEST(STDIO_TEST, snprintf_e) { EXPECT_SNPRINTF("1.500000e+00", "%e", 1.5); EXPECT_SNPRINTF("1.500000e+00", "%Le", 1.5L); } TEST(STDIO_TEST, swprintf_e) { EXPECT_SWPRINTF(L"1.500000e+00", L"%e", 1.5); EXPECT_SWPRINTF(L"1.500000e+00", L"%Le", 1.5L); } TEST(STDIO_TEST, snprintf_negative_zero_5084292) { EXPECT_SNPRINTF("-0.000000e+00", "%e", -0.0); EXPECT_SNPRINTF("-0.000000E+00", "%E", -0.0); EXPECT_SNPRINTF("-0.000000", "%f", -0.0); EXPECT_SNPRINTF("-0.000000", "%F", -0.0); EXPECT_SNPRINTF("-0", "%g", -0.0); EXPECT_SNPRINTF("-0", "%G", -0.0); EXPECT_SNPRINTF("-0x0p+0", "%a", -0.0); EXPECT_SNPRINTF("-0X0P+0", "%A", -0.0); } TEST(STDIO_TEST, swprintf_negative_zero_5084292) { EXPECT_SWPRINTF(L"-0.000000e+00", L"%e", -0.0); EXPECT_SWPRINTF(L"-0.000000E+00", L"%E", -0.0); EXPECT_SWPRINTF(L"-0.000000", L"%f", -0.0); EXPECT_SWPRINTF(L"-0.000000", L"%F", -0.0); EXPECT_SWPRINTF(L"-0", L"%g", -0.0); EXPECT_SWPRINTF(L"-0", L"%G", -0.0); EXPECT_SWPRINTF(L"-0x0p+0", L"%a", -0.0); EXPECT_SWPRINTF(L"-0X0P+0", L"%A", -0.0); } TEST(STDIO_TEST, snprintf_utf8_15439554) { locale_t cloc = newlocale(LC_ALL, "C.UTF-8", nullptr); locale_t old_locale = uselocale(cloc); // http://b/15439554 char buf[BUFSIZ]; // 1-byte character. snprintf(buf, sizeof(buf), "%dx%d", 1, 2); EXPECT_STREQ("1x2", buf); // 2-byte character. snprintf(buf, sizeof(buf), "%d\xc2\xa2%d", 1, 2); EXPECT_STREQ("1¢2", buf); // 3-byte character. snprintf(buf, sizeof(buf), "%d\xe2\x82\xac%d", 1, 2); EXPECT_STREQ("1€2", buf); // 4-byte character. snprintf(buf, sizeof(buf), "%d\xf0\xa4\xad\xa2%d", 1, 2); EXPECT_STREQ("1��2", buf); uselocale(old_locale); freelocale(cloc); } static void* snprintf_small_stack_fn(void*) { // Make life (realistically) hard for ourselves by allocating our own buffer for the result. char buf[PATH_MAX]; snprintf(buf, sizeof(buf), "/proc/%d", getpid()); return nullptr; } TEST(STDIO_TEST, snprintf_small_stack) { // Is it safe to call snprintf on a thread with a small stack? // (The snprintf implementation puts some pretty large buffers on the stack.) pthread_attr_t a; ASSERT_EQ(0, pthread_attr_init(&a)); ASSERT_EQ(0, pthread_attr_setstacksize(&a, PTHREAD_STACK_MIN)); pthread_t t; ASSERT_EQ(0, pthread_create(&t, &a, snprintf_small_stack_fn, nullptr)); ASSERT_EQ(0, pthread_join(t, nullptr)); } TEST(STDIO_TEST, snprintf_asterisk_overflow) { char buf[128]; ASSERT_EQ(5, snprintf(buf, sizeof(buf), "%.*s%c", 4, "hello world", '!')); ASSERT_EQ(12, snprintf(buf, sizeof(buf), "%.*s%c", INT_MAX/2, "hello world", '!')); ASSERT_EQ(12, snprintf(buf, sizeof(buf), "%.*s%c", INT_MAX-1, "hello world", '!')); ASSERT_EQ(12, snprintf(buf, sizeof(buf), "%.*s%c", INT_MAX, "hello world", '!')); ASSERT_EQ(12, snprintf(buf, sizeof(buf), "%.*s%c", -1, "hello world", '!')); // INT_MAX-1, INT_MAX, INT_MAX+1. ASSERT_EQ(12, snprintf(buf, sizeof(buf), "%.2147483646s%c", "hello world", '!')); ASSERT_EQ(12, snprintf(buf, sizeof(buf), "%.2147483647s%c", "hello world", '!')); ASSERT_ERRNO_FAILURE(ENOMEM, -1, snprintf(buf, sizeof(buf), "%.2147483648s%c", "hello } TEST(STDIO_TEST, swprintf_asterisk_overflow) { wchar_t buf[128]; ASSERT_EQ(5, swprintf(buf, sizeof(buf), L"%.*s%c", 4, "hello world", '!')); ASSERT_EQ(12, swprintf(buf, sizeof(buf), L"%.*s%c", INT_MAX / 2, "hello world", '!')); ASSERT_EQ(12, swprintf(buf, sizeof(buf), L"%.*s%c", INT_MAX - 1, "hello world", '!')); ASSERT_EQ(12, swprintf(buf, sizeof(buf), L"%.*s%c", INT_MAX, "hello world", '!')); ASSERT_EQ(12, swprintf(buf, sizeof(buf), L"%.*s%c", -1, "hello world", '!')); // INT_MAX-1, INT_MAX, INT_MAX+1. ASSERT_EQ(12, swprintf(buf, sizeof(buf), L"%.2147483646s%c", "hello world", '!')); ASSERT_EQ(12, swprintf(buf, sizeof(buf), L"%.2147483647s%c", "hello world", '!')); ASSERT_ERRNO_FAILURE(ENOMEM, -1, swprintf(buf, sizeof(buf), L"%.2147483648s%c", "hell } // Inspired by https://github.com/landley/toybox/issues/163. TEST(STDIO_TEST, printf_NULL) { char* null = nullptr; EXPECT_SNPRINTF("<(n>", "<%*.*s>", 2, 2, null); EXPECT_SNPRINTF("<(null)>", "<%*.*s>", 2, 8, null); EXPECT_SNPRINTF("< (n>", "<%*.*s>", 8, 2, null); EXPECT_SNPRINTF("< (null)>", "<%*.*s>", 8, 8, null); } TEST(STDIO_TEST, wprintf_NULL) { char* null = nullptr; EXPECT_SWPRINTF(L"<(n>", L"<%*.*s>", 2, 2, null); EXPECT_SWPRINTF(L"<(null)>", L"<%*.*s>", 2, 8, null); EXPECT_SWPRINTF(L"< (n>", L"<%*.*s>", 8, 2, null); EXPECT_SWPRINTF(L"< (null)>", L"<%*.*s>", 8, 8, null); } TEST(STDIO_TEST, fprintf) { TemporaryFile tf; FILE* tfile = fdopen(tf.fd, "r+"); ASSERT_TRUE(tfile != nullptr); ASSERT_EQ(7, fprintf(tfile, "%d %s", 123, "abc")); AssertFileIs(tfile, "123 abc"); fclose(tfile); } TEST(STDIO_TEST, fprintf_failures_7229520) { // http://b/7229520 FILE* fp; int fd_rdonly = open("/dev/null", O_RDONLY); ASSERT_NE(-1, fd_rdonly); // Unbuffered case where the fprintf(3) itself fails. ASSERT_NE(nullptr, fp = tmpfile()); setbuf(fp, nullptr); ASSERT_EQ(4, fprintf(fp, "epic")); ASSERT_NE(-1, dup2(fd_rdonly, fileno(fp))); ASSERT_EQ(-1, fprintf(fp, "fail")); ASSERT_EQ(0, fclose(fp)); // Buffered case where we won't notice until the fclose(3). // It's likely this is what was actually seen in http://b/7229520, // and that expecting fprintf to fail is setting yourself up for // disappointment. Remember to check fclose(3)'s return value, kids! ASSERT_NE(nullptr, fp = tmpfile()); ASSERT_EQ(4, fprintf(fp, "epic")); ASSERT_NE(-1, dup2(fd_rdonly, fileno(fp))); ASSERT_EQ(4, fprintf(fp, "fail")); ASSERT_EQ(-1, fclose(fp)); } TEST(STDIO_TEST, popen_r) { FILE* fp = popen("cat /proc/version", "r"); ASSERT_TRUE(fp != nullptr); char buf[16]; char* s = fgets(buf, sizeof(buf), fp); buf[13] = '\0'; ASSERT_STREQ("Linux version", s); ASSERT_EQ(0, pclose(fp)); } TEST(STDIO_TEST, popen_socketpair) { FILE* fp = popen("cat", "r+"); ASSERT_TRUE(fp != nullptr); fputs("hello\nworld\n", fp); fflush(fp); char buf[16]; ASSERT_NE(nullptr, fgets(buf, sizeof(buf), fp)); EXPECT_STREQ("hello\n", buf); ASSERT_NE(nullptr, fgets(buf, sizeof(buf), fp)); EXPECT_STREQ("world\n", buf); ASSERT_EQ(0, pclose(fp)); } TEST(STDIO_TEST, popen_socketpair_shutdown) { FILE* fp = popen("uniq -c", "r+"); ASSERT_TRUE(fp != nullptr); fputs("a\na\na\na\nb\n", fp); fflush(fp); ASSERT_EQ(0, shutdown(fileno(fp), SHUT_WR)); char buf[16]; ASSERT_NE(nullptr, fgets(buf, sizeof(buf), fp)); EXPECT_STREQ(" 4 a\n", buf); ASSERT_NE(nullptr, fgets(buf, sizeof(buf), fp)); EXPECT_STREQ(" 1 b\n", buf); ASSERT_EQ(0, pclose(fp)); } TEST(STDIO_TEST, popen_return_value_0) { FILE* fp = popen("true", "r"); ASSERT_TRUE(fp != nullptr); int status = pclose(fp); EXPECT_TRUE(WIFEXITED(status)); EXPECT_EQ(0, WEXITSTATUS(status)); } TEST(STDIO_TEST, popen_return_value_1) { FILE* fp = popen("false", "r"); ASSERT_TRUE(fp != nullptr); int status = pclose(fp); EXPECT_TRUE(WIFEXITED(status)); EXPECT_EQ(1, WEXITSTATUS(status)); } TEST(STDIO_TEST, popen_return_value_signal) { // Use a realtime signal to avoid creating a tombstone when running. std::string cmd = android::base::StringPrintf("kill -%d $$", SIGRTMIN); FILE* fp = popen(cmd.c_str(), "r"); ASSERT_TRUE(fp != nullptr); int status = pclose(fp); EXPECT_TRUE(WIFSIGNALED(status)); EXPECT_EQ(SIGRTMIN, WTERMSIG(status)); } TEST(STDIO_TEST, getc) { FILE* fp = fopen("/proc/version", "r"); ASSERT_TRUE(fp != nullptr); ASSERT_EQ('L', getc(fp)); ASSERT_EQ('i', getc(fp)); ASSERT_EQ('n', getc(fp)); ASSERT_EQ('u', getc(fp)); ASSERT_EQ('x', getc(fp)); fclose(fp); } TEST(STDIO_TEST, putc) { FILE* fp = fopen("/proc/version", "r"); ASSERT_TRUE(fp != nullptr); ASSERT_EQ(EOF, putc('x', fp)); fclose(fp); } TEST(STDIO_TEST, sscanf_swscanf) { struct stuff { char s1[123]; int i1, i2; char cs1[3]; char s2[3]; char c1; double d1; float f1; char s3[123]; void Check() { EXPECT_STREQ("hello", s1); EXPECT_EQ(123, i1); EXPECT_EQ(456, i2); EXPECT_EQ('a', cs1[0]); EXPECT_EQ('b', cs1[1]); EXPECT_EQ('x', cs1[2]); // No terminating NUL. EXPECT_STREQ("AB", s2); // Terminating NUL. EXPECT_EQ('!', c1); EXPECT_DOUBLE_EQ(1.23, d1); EXPECT_FLOAT_EQ(9.0f, f1); EXPECT_STREQ("world", s3); } } s; memset(&s, 'x', sizeof(s)); ASSERT_EQ(9, sscanf(" hello 123 456abAB! 1.23 0x1.2p3 world", "%s %i%i%2c%[A-Z]%c %lf %f %s", s.s1, &s.i1, &s.i2, s.cs1, s.s2, &s.c1, &s.d1, &s.f1, s.s3)); s.Check(); memset(&s, 'x', sizeof(s)); ASSERT_EQ(9, swscanf(L" hello 123 456abAB! 1.23 0x1.2p3 world", L"%s %i%i%2c%[A-Z]%c %lf %f %s", s.s1, &s.i1, &s.i2, s.cs1, s.s2, &s.c1, &s.d1, &s.f1, s.s3)); s.Check(); } template <typename T> static void CheckScanf(int sscanf_fn(const T*, const T*, ...), const T* input, const T* fmt, int expected_count, const char* expected_string) { char buf[256] = {}; ASSERT_EQ(expected_count, sscanf_fn(input, fmt, &buf)) << fmt; ASSERT_STREQ(expected_string, buf) << fmt; } TEST(STDIO_TEST, sscanf_ccl) { // `abc` is just those characters. CheckScanf(sscanf, "abcd", "%[abc]", 1, "abc"); // `a-c` is the range 'a' .. 'c'. CheckScanf(sscanf, "abcd", "%[a-c]", 1, "abc"); CheckScanf(sscanf, "-d", "%[a-c]", 0, ""); CheckScanf(sscanf, "ac-bAd", "%[a--c]", 1, "ac-bA"); // `a-c-e` is equivalent to `a-e`. CheckScanf(sscanf, "abcdefg", "%[a-c-e]", 1, "abcde"); // `e-a` is equivalent to `ae-` (because 'e' > 'a'). CheckScanf(sscanf, "-a-e-b", "%[e-a]", 1, "-a-e-"); // An initial '^' negates the set. CheckScanf(sscanf, "abcde", "%[^d]", 1, "abc"); CheckScanf(sscanf, "abcdefgh", "%[^c-d]", 1, "ab"); CheckScanf(sscanf, "hgfedcba", "%[^c-d]", 1, "hgfe"); // The first character may be ']' or '-' without being special. CheckScanf(sscanf, "[[]]x", "%[][]", 1, "[[]]"); CheckScanf(sscanf, "-a-x", "%[-a]", 1, "-a-"); // The last character may be '-' without being special. CheckScanf(sscanf, "-a-x", "%[a-]", 1, "-a-"); // X--Y is [X--] + Y, not [X--] + [--Y] (a bug in my initial implementation). CheckScanf(sscanf, "+,-/.", "%[+--/]", 1, "+,-/"); } TEST(STDIO_TEST, swscanf_ccl) { // `abc` is just those characters. CheckScanf(swscanf, L"abcd", L"%[abc]", 1, "abc"); // `a-c` is the range 'a' .. 'c'. CheckScanf(swscanf, L"abcd", L"%[a-c]", 1, "abc"); CheckScanf(swscanf, L"-d", L"%[a-c]", 0, ""); CheckScanf(swscanf, L"ac-bAd", L"%[a--c]", 1, "ac-bA"); // `a-c-e` is equivalent to `a-e`. CheckScanf(swscanf, L"abcdefg", L"%[a-c-e]", 1, "abcde"); // `e-a` is equivalent to `ae-` (because 'e' > 'a'). CheckScanf(swscanf, L"-a-e-b", L"%[e-a]", 1, "-a-e-"); // An initial '^' negates the set. CheckScanf(swscanf, L"abcde", L"%[^d]", 1, "abc"); CheckScanf(swscanf, L"abcdefgh", L"%[^c-d]", 1, "ab"); CheckScanf(swscanf, L"hgfedcba", L"%[^c-d]", 1, "hgfe"); // The first character may be ']' or '-' without being special. CheckScanf(swscanf, L"[[]]x", L"%[][]", 1, "[[]]"); CheckScanf(swscanf, L"-a-x", L"%[-a]", 1, "-a-"); // The last character may be '-' without being special. CheckScanf(swscanf, L"-a-x", L"%[a-]", 1, "-a-"); // X--Y is [X--] + Y, not [X--] + [--Y] (a bug in my initial implementation). CheckScanf(swscanf, L"+,-/.", L"%[+--/]", 1, "+,-/"); } template <typename T1, typename T2> static void CheckScanfM(int sscanf_fn(const T1*, const T1*, ...), const T1* input, const T1* fmt, int expected_count, const T2* expected_string) { T2* result = nullptr; ASSERT_EQ(expected_count, sscanf_fn(input, fmt, &result)) << fmt; if (expected_string == nullptr) { ASSERT_EQ(nullptr, result); } else { ASSERT_STREQ(expected_string, result) << fmt; } free(result); } TEST(STDIO_TEST, sscanf_mc) { char* p1 = nullptr; char* p2 = nullptr; ASSERT_EQ(2, sscanf("hello", "%mc%mc", &p1, &p2)); ASSERT_EQ('h', *p1); ASSERT_EQ('e', *p2); free(p1); free(p2); p1 = nullptr; ASSERT_EQ(1, sscanf("hello", "%4mc", &p1)); ASSERT_EQ('h', p1[0]); ASSERT_EQ('e', p1[1]); ASSERT_EQ('l', p1[2]); ASSERT_EQ('l', p1[3]); free(p1); p1 = nullptr; ASSERT_EQ(1, sscanf("hello world", "%30mc", &p1)); ASSERT_EQ('h', p1[0]); ASSERT_EQ('e', p1[1]); ASSERT_EQ('l', p1[2]); ASSERT_EQ('l', p1[3]); ASSERT_EQ('o', p1[4]); free(p1); } TEST(STDIO_TEST, sscanf_mlc) { // This is so useless that clang doesn't even believe it exists... #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat-invalid-specifier" #pragma clang diagnostic ignored "-Wformat-extra-args" wchar_t* p1 = nullptr; wchar_t* p2 = nullptr; ASSERT_EQ(2, sscanf("hello", "%mlc%mlc", &p1, &p2)); ASSERT_EQ(L'h', *p1); ASSERT_EQ(L'e', *p2); free(p1); free(p2); p1 = nullptr; ASSERT_EQ(1, sscanf("hello", "%4mlc", &p1)); ASSERT_EQ(L'h', p1[0]); ASSERT_EQ(L'e', p1[1]); ASSERT_EQ(L'l', p1[2]); ASSERT_EQ(L'l', p1[3]); free(p1); p1 = nullptr; ASSERT_EQ(1, sscanf("hello world", "%30mlc", &p1)); ASSERT_EQ(L'h', p1[0]); ASSERT_EQ(L'e', p1[1]); ASSERT_EQ(L'l', p1[2]); ASSERT_EQ(L'l', p1[3]); ASSERT_EQ(L'o', p1[4]); free(p1); #pragma clang diagnostic pop } TEST(STDIO_TEST, sscanf_ms) { CheckScanfM(sscanf, "hello", "%ms", 1, "hello"); CheckScanfM(sscanf, "hello", "%4ms", 1, "hell"); CheckScanfM(sscanf, "hello world", "%30ms", 1, "hello"); } TEST(STDIO_TEST, sscanf_mls) { CheckScanfM(sscanf, "hello", "%mls", 1, L"hello"); CheckScanfM(sscanf, "hello", "%4mls", 1, L"hell"); CheckScanfM(sscanf, "hello world", "%30mls", 1, L"hello"); } TEST(STDIO_TEST, sscanf_m_ccl) { CheckScanfM(sscanf, "hello", "%m[a-z]", 1, "hello"); CheckScanfM(sscanf, "hello", "%4m[a-z]", 1, "hell"); CheckScanfM(sscanf, "hello world", "%30m[a-z]", 1, "hello"); } TEST(STDIO_TEST, sscanf_ml_ccl) { CheckScanfM(sscanf, "hello", "%ml[a-z]", 1, L"hello"); CheckScanfM(sscanf, "hello", "%4ml[a-z]", 1, L"hell"); CheckScanfM(sscanf, "hello world", "%30ml[a-z]", 1, L"hello"); } TEST(STDIO_TEST, sscanf_ls) { wchar_t w[32] = {}; ASSERT_EQ(1, sscanf("hello world", "%ls", w)); ASSERT_EQ(L"hello", std::wstring(w)); } TEST(STDIO_TEST, sscanf_ls_suppress) { ASSERT_EQ(0, sscanf("hello world", "%*ls %*ls")); } TEST(STDIO_TEST, sscanf_ls_n) { setlocale(LC_ALL, "C.UTF-8"); wchar_t w[32] = {}; int pos = 0; ASSERT_EQ(1, sscanf("\xc4\x80", "%ls%n", w, &pos)); ASSERT_EQ(static_cast<wchar_t>(256), w[0]); ASSERT_EQ(2, pos); } TEST(STDIO_TEST, sscanf_ls_realloc) { // This is so useless that clang doesn't even believe it exists... #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat-invalid-specifier" #pragma clang diagnostic ignored "-Wformat-extra-args" wchar_t* p1 = nullptr; wchar_t* p2 = nullptr; ASSERT_EQ(2, sscanf("1234567890123456789012345678901234567890 world", "%mls %mls", &p1,&nb ASSERT_EQ(L"1234567890123456789012345678901234567890", std::wstring(p1)); ASSERT_EQ(L"world", std::wstring(p2)); #pragma clang diagnostic pop } // https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=202240 TEST(STDIO_TEST, scanf_wscanf_EOF) { EXPECT_EQ(0, sscanf("b", "ab")); EXPECT_EQ(EOF, sscanf("", "a")); EXPECT_EQ(0, swscanf(L"b", L"ab")); EXPECT_EQ(EOF, swscanf(L"", L"a")); } TEST(STDIO_TEST, scanf_invalid_UTF8) { #if 0 // TODO: more tests invented during code review; no regressions, so fix later. char buf[BUFSIZ]; wchar_t wbuf[BUFSIZ]; memset(buf, 0, sizeof(buf)); memset(wbuf, 0, sizeof(wbuf)); EXPECT_EQ(0, sscanf("\xc0" " foo", "%ls %s", wbuf, buf)); #endif } TEST(STDIO_TEST, scanf_no_match_no_termination) { char buf[4] = "x"; EXPECT_EQ(0, sscanf("d", "%[abc]", buf)); EXPECT_EQ('x', buf[0]); EXPECT_EQ(0, swscanf(L"d", L"%[abc]", buf)); EXPECT_EQ('x', buf[0]); wchar_t wbuf[4] = L"x"; EXPECT_EQ(0, swscanf(L"d", L"%l[abc]", wbuf)); EXPECT_EQ(L'x', wbuf[0]); EXPECT_EQ(EOF, sscanf("", "%s", buf)); EXPECT_EQ('x', buf[0]); EXPECT_EQ(EOF, swscanf(L"", L"%ls", wbuf)); EXPECT_EQ(L'x', wbuf[0]); } TEST(STDIO_TEST, scanf_wscanf_wide_character_class) { #if 0 // TODO: more tests invented during code review; no regressions, so fix later. wchar_t buf[BUFSIZ]; // A wide character shouldn't match an ASCII-only class for scanf or wscanf. memset(buf, 0, sizeof(buf)); EXPECT_EQ(1, sscanf("xĀyz", "%l[xy]", buf)); EXPECT_EQ(L"x"s, std::wstring(buf)); memset(buf, 0, sizeof(buf)); EXPECT_EQ(1, swscanf(L"xĀyz", L"%l[xy]", buf)); EXPECT_EQ(L"x"s, std::wstring(buf)); // Even if scanf has wide characters in a class, they won't match... // TODO: is that a bug? memset(buf, 0, sizeof(buf)); EXPECT_EQ(1, sscanf("xĀyz", "%l[xĀy]", buf)); EXPECT_EQ(L"x"s, std::wstring(buf)); // ...unless you use wscanf. memset(buf, 0, sizeof(buf)); EXPECT_EQ(1, swscanf(L"xĀyz", L"%l[xĀy]", buf)); EXPECT_EQ(L"xĀy"s, std::wstring(buf)); // Negation only covers ASCII for scanf... memset(buf, 0, sizeof(buf)); EXPECT_EQ(1, sscanf("xĀyz", "%l[^ab]", buf)); EXPECT_EQ(L"x"s, std::wstring(buf)); // ...but covers wide characters for wscanf. memset(buf, 0, sizeof(buf)); EXPECT_EQ(1, swscanf(L"xĀyz", L"%l[^ab]", buf)); EXPECT_EQ(L"xĀyz"s, std::wstring(buf)); // We already determined that non-ASCII characters are ignored in scanf classes. memset(buf, 0, sizeof(buf)); EXPECT_EQ(1, sscanf("x" "\xc4\x80" // Matches a byte from each wide char in the class. "\xc6\x82" // Neither byte is in the class. "yz", "%l[xy" "\xc5\x80" "\xc4\x81" "]", buf)); EXPECT_EQ(L"x", std::wstring(buf)); // bionic and glibc both behave badly for wscanf, so let's call it right for now... memset(buf, 0, sizeof(buf)); EXPECT_EQ(1, swscanf(L"x" L"\xc4\x80" L"\xc6\x82" L"yz", L"%l[xy" L"\xc5\x80" L"\xc4\x81" L"]", buf)); // Note that this isn't L"xĀ" --- although the *bytes* matched, they're // not put back together as a wide character. EXPECT_EQ(L"x" L"\xc4" L"\x80", std::wstring(buf)); #endif } TEST(STDIO_TEST, cantwrite_EBADF) { // If we open a file read-only... FILE* fp = fopen("/proc/version", "r"); // ...all attempts to write to that file should return failure. // They should also set errno to EBADF. This isn't POSIX, but it's traditional. EXPECT_ERRNO_FAILURE(EBADF, EOF, putc('x', fp)); EXPECT_ERRNO_FAILURE(EBADF, EOF, fprintf(fp, "hello")); EXPECT_ERRNO_FAILURE(EBADF, 0U, fwrite("hello", 1, 2, fp)); EXPECT_ERRNO_FAILURE(EBADF, EOF, fputs("hello", fp)); // glibc gets the wide-character functions wrong. errno = 0; EXPECT_EQ(EOF, fwprintf(fp, L"hello")); #if defined(__BIONIC__) EXPECT_ERRNO(EBADF); #endif errno = 0; EXPECT_EQ(WEOF, fputwc(L'x', fp)); #if defined(__BIONIC__) EXPECT_ERRNO(EBADF); #endif } // Tests that we can only have a consistent and correct fpos_t when using // f*pos functions (i.e. fpos doesn't get inside a multi byte character). TEST(STDIO_TEST, consistent_fpos_t) { ASSERT_STREQ("C.UTF-8", setlocale(LC_CTYPE, "C.UTF-8")); uselocale(LC_GLOBAL_LOCALE); FILE* fp = tmpfile(); ASSERT_TRUE(fp != nullptr); wchar_t mb_one_bytes = L'h'; wchar_t mb_two_bytes = 0x00a2; wchar_t mb_three_bytes = 0x20ac; wchar_t mb_four_bytes = 0x24b62; // Write to file. ASSERT_EQ(mb_one_bytes, static_cast<wchar_t>(fputwc(mb_one_bytes, fp))); ASSERT_EQ(mb_two_bytes, static_cast<wchar_t>(fputwc(mb_two_bytes, fp))); ASSERT_EQ(mb_three_bytes, static_cast<wchar_t>(fputwc(mb_three_bytes, fp))); ASSERT_EQ(mb_four_bytes, static_cast<wchar_t>(fputwc(mb_four_bytes, fp))); rewind(fp); // Record each character position. fpos_t pos1; fpos_t pos2; fpos_t pos3; fpos_t pos4; fpos_t pos5; EXPECT_EQ(0, fgetpos(fp, &pos1)); ASSERT_EQ(mb_one_bytes, static_cast<wchar_t>(fgetwc(fp))); EXPECT_EQ(0, fgetpos(fp, &pos2)); ASSERT_EQ(mb_two_bytes, static_cast<wchar_t>(fgetwc(fp))); EXPECT_EQ(0, fgetpos(fp, &pos3)); ASSERT_EQ(mb_three_bytes, static_cast<wchar_t>(fgetwc(fp))); EXPECT_EQ(0, fgetpos(fp, &pos4)); ASSERT_EQ(mb_four_bytes, static_cast<wchar_t>(fgetwc(fp))); EXPECT_EQ(0, fgetpos(fp, &pos5)); #if defined(__BIONIC__) // Bionic's fpos_t is just an alias for off_t. This is inherited from OpenBSD // upstream. Glibc differs by storing the mbstate_t inside its fpos_t. In // Bionic (and upstream OpenBSD) the mbstate_t is stored inside the FILE // structure. ASSERT_EQ(0, static_cast<off_t>(pos1)); ASSERT_EQ(1, static_cast<off_t>(pos2)); ASSERT_EQ(3, static_cast<off_t>(pos3)); ASSERT_EQ(6, static_cast<off_t>(pos4)); ASSERT_EQ(10, static_cast<off_t>(pos5)); #endif // Exercise back and forth movements of the position. ASSERT_EQ(0, fsetpos(fp, &pos2)); ASSERT_EQ(mb_two_bytes, static_cast<wchar_t>(fgetwc(fp))); ASSERT_EQ(0, fsetpos(fp, &pos1)); ASSERT_EQ(mb_one_bytes, static_cast<wchar_t>(fgetwc(fp))); ASSERT_EQ(0, fsetpos(fp, &pos4)); ASSERT_EQ(mb_four_bytes, static_cast<wchar_t>(fgetwc(fp))); ASSERT_EQ(0, fsetpos(fp, &pos3)); ASSERT_EQ(mb_three_bytes, static_cast<wchar_t>(fgetwc(fp))); ASSERT_EQ(0, fsetpos(fp, &pos5)); ASSERT_EQ(WEOF, fgetwc(fp)); fclose(fp); } // Exercise the interaction between fpos and seek. TEST(STDIO_TEST, fpos_t_and_seek) { ASSERT_STREQ("C.UTF-8", setlocale(LC_CTYPE, "C.UTF-8")); uselocale(LC_GLOBAL_LOCALE); // In glibc-2.16 fseek doesn't work properly in wide mode // (https://sourceware.org/bugzilla/show_bug.cgi?id=14543). One workaround is // to close and re-open the file. We do it in order to make the test pass // with all glibcs. TemporaryFile tf; FILE* fp = fdopen(tf.fd, "w+"); ASSERT_TRUE(fp != nullptr); wchar_t mb_two_bytes = 0x00a2; wchar_t mb_three_bytes = 0x20ac; wchar_t mb_four_bytes = 0x24b62; // Write to file. ASSERT_EQ(mb_two_bytes, static_cast<wchar_t>(fputwc(mb_two_bytes, fp))); ASSERT_EQ(mb_three_bytes, static_cast<wchar_t>(fputwc(mb_three_bytes, fp))); ASSERT_EQ(mb_four_bytes, static_cast<wchar_t>(fputwc(mb_four_bytes, fp))); fflush(fp); fclose(fp); fp = fopen(tf.path, "r"); ASSERT_TRUE(fp != nullptr); // Store a valid position. fpos_t mb_two_bytes_pos; ASSERT_EQ(0, fgetpos(fp, &mb_two_bytes_pos)); // Move inside mb_four_bytes with fseek. long offset_inside_mb = 6; ASSERT_EQ(0, fseek(fp, offset_inside_mb, SEEK_SET)); // Store the "inside multi byte" position. fpos_t pos_inside_mb; ASSERT_EQ(0, fgetpos(fp, &pos_inside_mb)); #if defined(__BIONIC__) ASSERT_EQ(offset_inside_mb, static_cast<off_t>(pos_inside_mb)); #endif // Reading from within a byte should produce an error. ASSERT_ERRNO_FAILURE(EILSEQ, WEOF, fgetwc(fp)); // Reverting to a valid position should work. ASSERT_EQ(0, fsetpos(fp, &mb_two_bytes_pos)); ASSERT_EQ(mb_two_bytes, static_cast<wchar_t>(fgetwc(fp))); // Moving withing a multi byte with fsetpos should work but reading should // produce an error. ASSERT_EQ(0, fsetpos(fp, &pos_inside_mb)); ASSERT_ERRNO_FAILURE(EILSEQ, WEOF, fgetwc(fp)); ASSERT_EQ(0, fclose(fp)); } TEST(STDIO_TEST, fmemopen) { char buf[16]; memset(buf, 0, sizeof(buf)); FILE* fp = fmemopen(buf, sizeof(buf), "r+"); ASSERT_EQ('<', fputc('<', fp)); ASSERT_NE(EOF, fputs("abc>\n", fp)); fflush(fp); // We wrote to the buffer... ASSERT_STREQ("<abc>\n", buf); // And can read back from the file. AssertFileIs(fp, "<abc>\n", true); ASSERT_EQ(0, fclose(fp)); } TEST(STDIO_TEST, fmemopen_nullptr) { FILE* fp = fmemopen(nullptr, 128, "r+"); ASSERT_NE(EOF, fputs("xyz\n", fp)); AssertFileIs(fp, "xyz\n", true); ASSERT_EQ(0, fclose(fp)); } TEST(STDIO_TEST, fmemopen_trailing_NUL_byte) { FILE* fp; char buf[8]; // POSIX: "When a stream open for writing is flushed or closed, a null byte // shall be written at the current position or at the end of the buffer, // depending on the size of the contents." memset(buf, 'x', sizeof(buf)); ASSERT_NE(nullptr, fp = fmemopen(buf, sizeof(buf), "w")); // Even with nothing written (and not in truncate mode), we'll flush a NUL... ASSERT_EQ(0, fflush(fp)); EXPECT_EQ("\0xxxxxxx"s, std::string(buf, buf + sizeof(buf))); // Now write and check that the NUL moves along with our writes... ASSERT_NE(EOF, fputs("hello", fp)); ASSERT_EQ(0, fflush(fp)); EXPECT_EQ("hello\0xx"s, std::string(buf, buf + sizeof(buf))); ASSERT_NE(EOF, fputs("wo", fp)); ASSERT_EQ(0, fflush(fp)); EXPECT_EQ("hellowo\0"s, std::string(buf, buf + sizeof(buf))); ASSERT_EQ(0, fclose(fp)); // "If a stream open for update is flushed or closed and the last write has // advanced the current buffer size, a null byte shall be written at the end // of the buffer if it fits." memset(buf, 'x', sizeof(buf)); ASSERT_NE(nullptr, fp = fmemopen(buf, sizeof(buf), "r+")); // Nothing written yet, so no advance... ASSERT_EQ(0, fflush(fp)); EXPECT_EQ("xxxxxxxx"s, std::string(buf, buf + sizeof(buf))); ASSERT_NE(EOF, fputs("hello", fp)); ASSERT_EQ(0, fclose(fp)); } TEST(STDIO_TEST, fmemopen_size) { FILE* fp; char buf[16]; memset(buf, 'x', sizeof(buf)); // POSIX: "The stream shall also maintain the size of the current buffer // contents; use of fseek() or fseeko() on the stream with SEEK_END shall // seek relative to this size." // "For modes r and r+ the size shall be set to the value given by the size // argument." ASSERT_NE(nullptr, fp = fmemopen(buf, 16, "r")); ASSERT_EQ(0, fseek(fp, 0, SEEK_END)); EXPECT_EQ(16, ftell(fp)); EXPECT_EQ(16, ftello(fp)); ASSERT_EQ(0, fseeko(fp, 0, SEEK_END)); EXPECT_EQ(16, ftell(fp)); EXPECT_EQ(16, ftello(fp)); ASSERT_EQ(0, fclose(fp)); ASSERT_NE(nullptr, fp = fmemopen(buf, 16, "r+")); ASSERT_EQ(0, fseek(fp, 0, SEEK_END)); EXPECT_EQ(16, ftell(fp)); EXPECT_EQ(16, ftello(fp)); ASSERT_EQ(0, fseeko(fp, 0, SEEK_END)); EXPECT_EQ(16, ftell(fp)); EXPECT_EQ(16, ftello(fp)); ASSERT_EQ(0, fclose(fp)); // "For modes w and w+ the initial size shall be zero..." ASSERT_NE(nullptr, fp = fmemopen(nullptr, 16, "w")); ASSERT_EQ(0, fseek(fp, 0, SEEK_END)); EXPECT_EQ(0, ftell(fp)); EXPECT_EQ(0, ftello(fp)); ASSERT_EQ(0, fseeko(fp, 0, SEEK_END)); EXPECT_EQ(0, ftell(fp)); EXPECT_EQ(0, ftello(fp)); ASSERT_EQ(0, fclose(fp)); ASSERT_NE(nullptr, fp = fmemopen(nullptr, 16, "w+")); ASSERT_EQ(0, fseek(fp, 0, SEEK_END)); EXPECT_EQ(0, ftell(fp)); EXPECT_EQ(0, ftello(fp)); ASSERT_EQ(0, fseeko(fp, 0, SEEK_END)); EXPECT_EQ(0, ftell(fp)); EXPECT_EQ(0, ftello(fp)); ASSERT_EQ(0, fclose(fp)); // "...and for modes a and a+ the initial size shall be: // 1. Zero, if buf is a null pointer ASSERT_NE(nullptr, fp = fmemopen(nullptr, 16, "a")); ASSERT_EQ(0, fseek(fp, 0, SEEK_END)); EXPECT_EQ(0, ftell(fp)); EXPECT_EQ(0, ftello(fp)); ASSERT_EQ(0, fseeko(fp, 0, SEEK_END)); EXPECT_EQ(0, ftell(fp)); EXPECT_EQ(0, ftello(fp)); ASSERT_EQ(0, fclose(fp)); ASSERT_NE(nullptr, fp = fmemopen(nullptr, 16, "a+")); ASSERT_EQ(0, fseek(fp, 0, SEEK_END)); EXPECT_EQ(0, ftell(fp)); EXPECT_EQ(0, ftello(fp)); ASSERT_EQ(0, fseeko(fp, 0, SEEK_END)); EXPECT_EQ(0, ftell(fp)); EXPECT_EQ(0, ftello(fp)); ASSERT_EQ(0, fclose(fp)); // 2. The position of the first null byte in the buffer, if one is found memset(buf, 'x', sizeof(buf)); buf[3] = '\0'; ASSERT_NE(nullptr, fp = fmemopen(buf, 16, "a")); ASSERT_EQ(0, fseek(fp, 0, SEEK_END)); EXPECT_EQ(3, ftell(fp)); EXPECT_EQ(3, ftello(fp)); ASSERT_EQ(0, fseeko(fp, 0, SEEK_END)); EXPECT_EQ(3, ftell(fp)); EXPECT_EQ(3, ftello(fp)); ASSERT_EQ(0, fclose(fp)); memset(buf, 'x', sizeof(buf)); buf[3] = '\0'; ASSERT_NE(nullptr, fp = fmemopen(buf, 16, "a+")); ASSERT_EQ(0, fseek(fp, 0, SEEK_END)); EXPECT_EQ(3, ftell(fp)); EXPECT_EQ(3, ftello(fp)); ASSERT_EQ(0, fseeko(fp, 0, SEEK_END)); EXPECT_EQ(3, ftell(fp)); EXPECT_EQ(3, ftello(fp)); ASSERT_EQ(0, fclose(fp)); // 3. The value of the size argument, if buf is not a null pointer and no // null byte is found. memset(buf, 'x', sizeof(buf)); ASSERT_NE(nullptr, fp = fmemopen(buf, 16, "a")); ASSERT_EQ(0, fseek(fp, 0, SEEK_END)); EXPECT_EQ(16, ftell(fp)); EXPECT_EQ(16, ftello(fp)); ASSERT_EQ(0, fseeko(fp, 0, SEEK_END)); EXPECT_EQ(16, ftell(fp)); EXPECT_EQ(16, ftello(fp)); ASSERT_EQ(0, fclose(fp)); memset(buf, 'x', sizeof(buf)); ASSERT_NE(nullptr, fp = fmemopen(buf, 16, "a+")); ASSERT_EQ(0, fseek(fp, 0, SEEK_END)); EXPECT_EQ(16, ftell(fp)); EXPECT_EQ(16, ftello(fp)); ASSERT_EQ(0, fseeko(fp, 0, SEEK_END)); EXPECT_EQ(16, ftell(fp)); EXPECT_EQ(16, ftello(fp)); ASSERT_EQ(0, fclose(fp)); } TEST(STDIO_TEST, fmemopen_SEEK_END) { // fseek SEEK_END is relative to the current string length, not the buffer size. FILE* fp; char buf[8]; memset(buf, 'x', sizeof(buf)); strcpy(buf, "str"); ASSERT_NE(nullptr, fp = fmemopen(buf, sizeof(buf), "w+")); ASSERT_NE(EOF, fputs("string", fp)); EXPECT_EQ(0, fseek(fp, 0, SEEK_END)); EXPECT_EQ(static_cast<long>(strlen("string")), ftell(fp)); EXPECT_EQ(static_cast<off_t>(strlen("string")), ftello(fp)); EXPECT_EQ(0, fclose(fp)); // glibc < 2.22 interpreted SEEK_END the wrong way round (subtracting rather // than adding). ASSERT_NE(nullptr, fp = fmemopen(buf, sizeof(buf), "w+")); ASSERT_NE(EOF, fputs("54321", fp)); EXPECT_EQ(0, fseek(fp, -2, SEEK_END)); EXPECT_EQ('2', fgetc(fp)); EXPECT_EQ(0, fclose(fp)); } TEST(STDIO_TEST, fmemopen_seek_invalid) { char buf[8]; memset(buf, 'x', sizeof(buf)); FILE* fp = fmemopen(buf, sizeof(buf), "w"); ASSERT_TRUE(fp != nullptr); // POSIX: "An attempt to seek ... to a negative position or to a position // larger than the buffer size given in the size argument shall fail." // (There's no mention of what errno should be set to, and glibc doesn't // set errno in any of these cases.) EXPECT_EQ(-1, fseek(fp, -2, SEEK_SET)); EXPECT_EQ(-1, fseeko(fp, -2, SEEK_SET)); EXPECT_EQ(-1, fseek(fp, sizeof(buf) + 1, SEEK_SET)); EXPECT_EQ(-1, fseeko(fp, sizeof(buf) + 1, SEEK_SET)); } TEST(STDIO_TEST, fmemopen_read_EOF) { // POSIX: "A read operation on the stream shall not advance the current // buffer position beyond the current buffer size." char buf[8]; memset(buf, 'x', sizeof(buf)); FILE* fp = fmemopen(buf, sizeof(buf), "r"); ASSERT_TRUE(fp != nullptr); char buf2[BUFSIZ]; ASSERT_EQ(8U, fread(buf2, 1, sizeof(buf2), fp)); // POSIX: "Reaching the buffer size in a read operation shall count as // end-of-file. ASSERT_TRUE(feof(fp)); ASSERT_EQ(EOF, fgetc(fp)); ASSERT_EQ(0, fclose(fp)); } TEST(STDIO_TEST, fmemopen_read_null_bytes) { // POSIX: "Null bytes in the buffer shall have no special meaning for reads." char buf[] = "h\0e\0l\0l\0o"; FILE* fp = fmemopen(buf, sizeof(buf), "r"); ASSERT_TRUE(fp != nullptr); ASSERT_EQ('h', fgetc(fp)); ASSERT_EQ(0, fgetc(fp)); ASSERT_EQ('e', fgetc(fp)); ASSERT_EQ(0, fgetc(fp)); ASSERT_EQ('l', fgetc(fp)); ASSERT_EQ(0, fgetc(fp)); // POSIX: "The read operation shall start at the current buffer position of // the stream." char buf2[8]; memset(buf2, 'x', sizeof(buf2)); ASSERT_EQ(4U, fread(buf2, 1, sizeof(buf2), fp)); ASSERT_EQ('l', buf2[0]); ASSERT_EQ(0, buf2[1]); ASSERT_EQ('o', buf2[2]); ASSERT_EQ(0, buf2[3]); for (size_t i = 4; i < sizeof(buf2); ++i) ASSERT_EQ('x', buf2[i]) << i; ASSERT_TRUE(feof(fp)); ASSERT_EQ(0, fclose(fp)); } TEST(STDIO_TEST, fmemopen_write) { FILE* fp; char buf[8]; // POSIX: "A write operation shall start either at the current position of // the stream (if mode has not specified 'a' as the first character)..." memset(buf, 'x', sizeof(buf)); ASSERT_NE(nullptr, fp = fmemopen(buf, sizeof(buf), "r+")); setbuf(fp, nullptr); // Turn off buffering so we can see what's happening as it happens. ASSERT_EQ(0, fseek(fp, 2, SEEK_SET)); ASSERT_EQ(' ', fputc(' ', fp)); EXPECT_EQ("xx xxxxx", std::string(buf, buf + sizeof(buf))); ASSERT_EQ(0, fclose(fp)); // "...or at the current size of the stream (if mode had 'a' as the first // character)." (See the fmemopen_size test for what "size" means, but for // mode "a", it's the first NUL byte.) memset(buf, 'x', sizeof(buf)); buf[3] = '\0'; ASSERT_NE(nullptr, fp = fmemopen(buf, sizeof(buf), "a+")); setbuf(fp, nullptr); // Turn off buffering so we can see what's happening as it happens. ASSERT_EQ(' ', fputc(' ', fp)); EXPECT_EQ("xxx \0xxx"s, std::string(buf, buf + sizeof(buf))); ASSERT_EQ(0, fclose(fp)); // "If the current position at the end of the write is larger than the // current buffer size, the current buffer size shall be set to the current // position." (See the fmemopen_size test for what "size" means, but to // query it we SEEK_END with offset 0, and then ftell.) memset(buf, 'x', sizeof(buf)); ASSERT_NE(nullptr, fp = fmemopen(buf, sizeof(buf), "w+")); setbuf(fp, nullptr); // Turn off buffering so we can see what's happening as it happens. ASSERT_EQ(0, fseek(fp, 0, SEEK_END)); EXPECT_EQ(0, ftell(fp)); ASSERT_EQ(' ', fputc(' ', fp)); ASSERT_EQ(0, fseek(fp, 0, SEEK_END)); EXPECT_EQ(1, ftell(fp)); ASSERT_NE(EOF, fputs("123", fp)); ASSERT_EQ(0, fseek(fp, 0, SEEK_END)); EXPECT_EQ(4, ftell(fp)); EXPECT_EQ(" 123\0xxx"s, std::string(buf, buf + sizeof(buf))); ASSERT_EQ(0, fclose(fp)); } TEST(STDIO_TEST, fmemopen_write_EOF) { // POSIX: "A write operation on the stream shall not advance the current // buffer size beyond the size given in the size argument." FILE* fp; // Scalar writes... ASSERT_NE(nullptr, fp = fmemopen(nullptr, 4, "w")); setbuf(fp, nullptr); // Turn off buffering so we can see what's happening as it happens. ASSERT_EQ('x', fputc('x', fp)); ASSERT_EQ('x', fputc('x', fp)); ASSERT_EQ('x', fputc('x', fp)); ASSERT_EQ(EOF, fputc('x', fp)); // Only 3 fit because of the implicit NUL. ASSERT_EQ(0, fclose(fp)); // Vector writes... ASSERT_NE(nullptr, fp = fmemopen(nullptr, 4, "w")); setbuf(fp, nullptr); // Turn off buffering so we can see what's happening as it happens. ASSERT_EQ(3U, fwrite("xxxx", 1, 4, fp)); ASSERT_EQ(0, fclose(fp)); } TEST(STDIO_TEST, fmemopen_initial_position) { // POSIX: "The ... current position in the buffer ... shall be initially // set to either the beginning of the buffer (for r and w modes) ..." char buf[] = "hello\0world"; FILE* fp; ASSERT_NE(nullptr, fp = fmemopen(buf, sizeof(buf), "r")); EXPECT_EQ(0L, ftell(fp)); EXPECT_EQ(0, fclose(fp)); ASSERT_NE(nullptr, fp = fmemopen(buf, sizeof(buf), "w")); EXPECT_EQ(0L, ftell(fp)); EXPECT_EQ(0, fclose(fp)); buf[0] = 'h'; // (Undo the effects of the above.) // POSIX: "...or to the first null byte in the buffer (for a modes)." ASSERT_NE(nullptr, fp = fmemopen(buf, sizeof(buf), "a")); EXPECT_EQ(5L, ftell(fp)); EXPECT_EQ(0, fclose(fp)); // POSIX: "If no null byte is found in append mode, the initial position // shall be set to one byte after the end of the buffer." memset(buf, 'x', sizeof(buf)); ASSERT_NE(nullptr, fp = fmemopen(buf, sizeof(buf), "a")); EXPECT_EQ(static_cast<long>(sizeof(buf)), ftell(fp)); EXPECT_EQ(0, fclose(fp)); } TEST(STDIO_TEST, fmemopen_initial_position_allocated) { // POSIX: "If buf is a null pointer, the initial position shall always be // set to the beginning of the buffer." FILE* fp = fmemopen(nullptr, 128, "a+"); ASSERT_TRUE(fp != nullptr); EXPECT_EQ(0L, ftell(fp)); EXPECT_EQ(0L, fseek(fp, 0, SEEK_SET)); EXPECT_EQ(0, fclose(fp)); } TEST(STDIO_TEST, fmemopen_zero_length) { // POSIX says it's up to the implementation whether or not you can have a // zero-length buffer (but "A future version of this standard may require // support of zero-length buffer streams explicitly"). BSD and glibc < 2.22 // agreed that you couldn't, but glibc >= 2.22 allows it for consistency. FILE* fp; char buf[16]; ASSERT_NE(nullptr, fp = fmemopen(buf, 0, "r+")); ASSERT_EQ(EOF, fgetc(fp)); ASSERT_TRUE(feof(fp)); ASSERT_EQ(0, fclose(fp)); ASSERT_NE(nullptr, fp = fmemopen(nullptr, 0, "r+")); ASSERT_EQ(EOF, fgetc(fp)); ASSERT_TRUE(feof(fp)); ASSERT_EQ(0, fclose(fp)); ASSERT_NE(nullptr, fp = fmemopen(buf, 0, "w+")); setbuf(fp, nullptr); // Turn off buffering so we can see what's happening as it happens. ASSERT_EQ(EOF, fputc('x', fp)); ASSERT_EQ(0, fclose(fp)); ASSERT_NE(nullptr, fp = fmemopen(nullptr, 0, "w+")); setbuf(fp, nullptr); // Turn off buffering so we can see what's happening as it happens. ASSERT_EQ(EOF, fputc('x', fp)); ASSERT_EQ(0, fclose(fp)); } TEST(STDIO_TEST, fmemopen_zero_length_buffer_overrun) { char buf[2] = "x"; ASSERT_EQ('x', buf[0]); FILE* fp = fmemopen(buf, 0, "w"); ASSERT_EQ('x', buf[0]); ASSERT_EQ(0, fclose(fp)); } TEST(STDIO_TEST, fmemopen_write_only_allocated) { // POSIX says fmemopen "may fail if the mode argument does not include a '+'". // BSD fails, glibc doesn't. We side with the more lenient. FILE* fp; ASSERT_NE(nullptr, fp = fmemopen(nullptr, 16, "r")); ASSERT_EQ(0, fclose(fp)); ASSERT_NE(nullptr, fp = fmemopen(nullptr, 16, "w")); ASSERT_EQ(0, fclose(fp)); } TEST(STDIO_TEST, fmemopen_fileno) { // There's no fd backing an fmemopen FILE*. FILE* fp = fmemopen(nullptr, 16, "r"); ASSERT_TRUE(fp != nullptr); ASSERT_ERRNO_FAILURE(EBADF, -1, fileno(fp)); ASSERT_EQ(0, fclose(fp)); } TEST(STDIO_TEST, fmemopen_append_after_seek) { // In BSD and glibc < 2.22, append mode didn't force writes to append if // there had been an intervening seek. FILE* fp; char buf[] = "hello\0world"; ASSERT_NE(nullptr, fp = fmemopen(buf, sizeof(buf), "a")); setbuf(fp, nullptr); // Turn off buffering so we can see what's happening as it happens. ASSERT_EQ(0, fseek(fp, 0, SEEK_SET)); ASSERT_NE(EOF, fputc('!', fp)); EXPECT_EQ("hello!\0orld\0"s, std::string(buf, buf + sizeof(buf))); ASSERT_EQ(0, fclose(fp)); memcpy(buf, "hello\0world", sizeof(buf)); ASSERT_NE(nullptr, fp = fmemopen(buf, sizeof(buf), "a+")); setbuf(fp, nullptr); // Turn off buffering so we can see what's happening as it happens. ASSERT_EQ(0, fseek(fp, 0, SEEK_SET)); ASSERT_NE(EOF, fputc('!', fp)); EXPECT_EQ("hello!\0orld\0"s, std::string(buf, buf + sizeof(buf))); ASSERT_EQ(0, fclose(fp)); } TEST(STDIO_TEST, open_memstream) { char* p = nullptr; size_t size = 0; FILE* fp = open_memstream(&p, &size); ASSERT_NE(EOF, fputs("hello, world!", fp)); fclose(fp); ASSERT_STREQ("hello, world!", p); ASSERT_EQ(strlen("hello, world!"), size); free(p); } TEST(STDIO_TEST, open_memstream_EINVAL) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wnonnull" char* p; size_t size; // Invalid buffer. ASSERT_ERRNO_FAILURE(EINVAL, nullptr, open_memstream(nullptr, &size)); // Invalid size. ASSERT_ERRNO_FAILURE(EINVAL, nullptr, open_memstream(&p, nullptr)); #pragma clang diagnostic pop #else GTEST_SKIP() << "glibc is broken"; #endif } TEST(STDIO_TEST, fdopen_add_CLOEXEC) { // This fd doesn't have O_CLOEXEC... int fd = open("/proc/version", O_RDONLY); ASSERT_FALSE(CloseOnExec(fd)); // ...but the new one does. FILE* fp = fdopen(fd, "re"); ASSERT_TRUE(CloseOnExec(fileno(fp))); fclose(fp); } TEST(STDIO_TEST, fdopen_remove_CLOEXEC) { // This fd has O_CLOEXEC... int fd = open("/proc/version", O_RDONLY | O_CLOEXEC); ASSERT_TRUE(CloseOnExec(fd)); // ...but the new one doesn't. FILE* fp = fdopen(fd, "r"); ASSERT_TRUE(CloseOnExec(fileno(fp))); fclose(fp); } TEST(STDIO_TEST, freopen_add_CLOEXEC) { // This FILE* doesn't have O_CLOEXEC... FILE* fp = fopen("/proc/version", "r"); ASSERT_FALSE(CloseOnExec(fileno(fp))); // ...but the new one does. fp = freopen("/proc/version", "re", fp); ASSERT_TRUE(CloseOnExec(fileno(fp))); fclose(fp); } TEST(STDIO_TEST, freopen_remove_CLOEXEC) { // This FILE* has O_CLOEXEC... FILE* fp = fopen("/proc/version", "re"); ASSERT_TRUE(CloseOnExec(fileno(fp))); // ...but the new one doesn't. fp = freopen("/proc/version", "r", fp); ASSERT_FALSE(CloseOnExec(fileno(fp))); fclose(fp); } TEST(STDIO_TEST, freopen_null_filename_add_CLOEXEC) { // This FILE* doesn't have O_CLOEXEC... FILE* fp = fopen("/proc/version", "r"); ASSERT_FALSE(CloseOnExec(fileno(fp))); // ...but the new one does. fp = freopen(nullptr, "re", fp); ASSERT_TRUE(CloseOnExec(fileno(fp))); fclose(fp); } TEST(STDIO_TEST, freopen_null_filename_remove_CLOEXEC) { // This FILE* has O_CLOEXEC... FILE* fp = fopen("/proc/version", "re"); ASSERT_TRUE(CloseOnExec(fileno(fp))); // ...but the new one doesn't. fp = freopen(nullptr, "r", fp); ASSERT_FALSE(CloseOnExec(fileno(fp))); fclose(fp); } TEST(STDIO_TEST, fopen64_freopen64) { FILE* fp = fopen64("/proc/version", "r"); ASSERT_TRUE(fp != nullptr); fp = freopen64("/proc/version", "re", fp); ASSERT_TRUE(fp != nullptr); fclose(fp); } // https://code.google.com/p/android/issues/detail?id=81155 // http://b/18556607 TEST(STDIO_TEST, fread_unbuffered_pathological_performance) { FILE* fp = fopen("/dev/zero", "r"); ASSERT_TRUE(fp != nullptr); // Make this stream unbuffered. setvbuf(fp, nullptr, _IONBF, 0); char buf[65*1024]; memset(buf, 0xff, sizeof(buf)); time_t t0 = time(nullptr); for (size_t i = 0; i < 1024; ++i) { ASSERT_EQ(1U, fread(buf, 64*1024, 1, fp)); } time_t t1 = time(nullptr); fclose(fp); // 1024 64KiB reads should have been very quick. ASSERT_LE(t1 - t0, 1); for (size_t i = 0; i < 64*1024; ++i) { ASSERT_EQ('\0', buf[i]); } for (size_t i = 64*1024; i < 65*1024; ++i) { ASSERT_EQ('\xff', buf[i]); } } TEST(STDIO_TEST, fread_EOF) { std::string digits("0123456789"); FILE* fp = fmemopen(&digits[0], digits.size(), "r"); // Try to read too much, but little enough that it still fits in the FILE's internal buffer. char buf1[4 * 4]; memset(buf1, 0, sizeof(buf1)); ASSERT_EQ(2U, fread(buf1, 4, 4, fp)); ASSERT_STREQ("0123456789", buf1); ASSERT_TRUE(feof(fp)); rewind(fp); // Try to read way too much so stdio tries to read more direct from the stream. char buf2[4 * 4096]; memset(buf2, 0, sizeof(buf2)); ASSERT_EQ(2U, fread(buf2, 4, 4096, fp)); ASSERT_STREQ("0123456789", buf2); ASSERT_TRUE(feof(fp)); fclose(fp); } static void test_fread_from_write_only_stream(size_t n) { FILE* fp = fopen("/dev/null", "w"); std::vector<char> buf(n, 0); ASSERT_ERRNO_FAILURE(EBADF, 0U, fread(&buf[0], n, 1, fp)); ASSERT_TRUE(ferror(fp)); ASSERT_FALSE(feof(fp)); fclose(fp); } TEST(STDIO_TEST, fread_from_write_only_stream_slow_path) { test_fread_from_write_only_stream(1); } TEST(STDIO_TEST, fread_from_write_only_stream_fast_path) { test_fread_from_write_only_stream(64*1024); } TEST(STDIO_TEST, fwrite_to_read_only_stream) { FILE* fp = fopen("/proc/version", "re"); ASSERT_FALSE(ferror(fp)); ASSERT_EQ(0U, fwrite("hello", 1, 5, fp)); ASSERT_TRUE(ferror(fp)); } TEST(STDIO_TEST, fputc_to_read_only_stream) { FILE* fp = fopen("/proc/version", "re"); ASSERT_FALSE(ferror(fp)); ASSERT_EQ(EOF, fputc('x', fp)); ASSERT_TRUE(ferror(fp)); } TEST(STDIO_TEST, fprintf_to_read_only_stream) { FILE* fp = fopen("/proc/version", "re"); ASSERT_FALSE(ferror(fp)); ASSERT_EQ(-1, fprintf(fp, "%s%d", "hello", 123)); ASSERT_TRUE(ferror(fp)); } static void test_fwrite_after_fread(size_t n) { TemporaryFile tf; FILE* fp = fdopen(tf.fd, "w+"); ASSERT_EQ(1U, fwrite("1", 1, 1, fp)); fflush(fp); // We've flushed but not rewound, so there's nothing to read. std::vector<char> buf(n, 0); ASSERT_EQ(0U, fread(&buf[0], 1, buf.size(), fp)); ASSERT_TRUE(feof(fp)); // But hitting EOF doesn't prevent us from writing... errno = 0; ASSERT_EQ(1U, fwrite("2", 1, 1, fp)) << strerror(errno); // And if we rewind, everything's there. rewind(fp); ASSERT_EQ(2U, fread(&buf[0], 1, buf.size(), fp)); ASSERT_EQ('1', buf[0]); ASSERT_EQ('2', buf[1]); fclose(fp); } TEST(STDIO_TEST, fwrite_after_fread_slow_path) { test_fwrite_after_fread(16); } TEST(STDIO_TEST, fwrite_after_fread_fast_path) { test_fwrite_after_fread(64*1024); } // http://b/19172514 TEST(STDIO_TEST, fread_after_fseek) { TemporaryFile tf; FILE* fp = fopen(tf.path, "w+"); ASSERT_TRUE(fp != nullptr); char file_data[12288]; for (size_t i = 0; i < 12288; i++) { file_data[i] = i; } ASSERT_EQ(12288U, fwrite(file_data, 1, 12288, fp)); fclose(fp); fp = fopen(tf.path, "r"); ASSERT_TRUE(fp != nullptr); char buffer[8192]; size_t cur_location = 0; // Small read to populate internal buffer. ASSERT_EQ(100U, fread(buffer, 1, 100, fp)); ASSERT_EQ(memcmp(file_data, buffer, 100), 0); cur_location = static_cast<size_t>(ftell(fp)); // Large read to force reading into the user supplied buffer and bypassing // the internal buffer. ASSERT_EQ(8192U, fread(buffer, 1, 8192, fp)); ASSERT_EQ(memcmp(file_data+cur_location, buffer, 8192), 0); // Small backwards seek to verify fseek does not reuse the internal buffer. ASSERT_EQ(0, fseek(fp, -22, SEEK_CUR)) << strerror(errno); cur_location = static_cast<size_t>(ftell(fp)); ASSERT_EQ(22U, fread(buffer, 1, 22, fp)); ASSERT_EQ(memcmp(file_data+cur_location, buffer, 22), 0); fclose(fp); } // https://code.google.com/p/android/issues/detail?id=184847 TEST(STDIO_TEST, fread_EOF_184847) { TemporaryFile tf; char buf[6] = {0}; FILE* fw = fopen(tf.path, "w"); ASSERT_TRUE(fw != nullptr); FILE* fr = fopen(tf.path, "r"); ASSERT_TRUE(fr != nullptr); fwrite("a", 1, 1, fw); fflush(fw); ASSERT_EQ(1U, fread(buf, 1, 1, fr)); ASSERT_STREQ("a", buf); // 'fr' is now at EOF. ASSERT_EQ(0U, fread(buf, 1, 1, fr)); ASSERT_TRUE(feof(fr)); // Write some more... fwrite("z", 1, 1, fw); fflush(fw); // ...and check that we can read it back. // (BSD thinks that once a stream has hit EOF, it must always return EOF. SysV disagrees.) ASSERT_EQ(1U, fread(buf, 1, 1, fr)); ASSERT_STREQ("z", buf); // But now we're done. ASSERT_EQ(0U, fread(buf, 1, 1, fr)); fclose(fr); fclose(fw); } TEST(STDIO_TEST, fclose_invalidates_fd) { // The typical error we're trying to help people catch involves accessing // memory after it's been freed. But we know that stdin/stdout/stderr are // special and don't get deallocated, so this test uses stdin. ASSERT_EQ(0, fclose(stdin)); // Even though using a FILE* after close is undefined behavior, I've closed // this bug as "WAI" too many times. We shouldn't hand out stale fds, // especially because they might actually correspond to a real stream. ASSERT_ERRNO_FAILURE(EBADF, -1, fileno(stdin)); } TEST(STDIO_TEST, fseek_ftell_unseekable) { #if defined(__BIONIC__) // glibc has fopencookie instead. auto read_fn = [](void*, char*, int) { return -1; }; FILE* fp = funopen(nullptr, read_fn, nullptr, nullptr, nullptr); ASSERT_TRUE(fp != nullptr); // Check that ftell balks on an unseekable FILE*. ASSERT_ERRNO_FAILURE(ESPIPE, -1, ftell(fp)); // SEEK_CUR is rewritten as SEEK_SET internally... ASSERT_ERRNO_FAILURE(ESPIPE, -1, fseek(fp, 0, SEEK_CUR)); // ...so it's worth testing the direct seek path too. ASSERT_ERRNO_FAILURE(ESPIPE, -1, fseek(fp, 0, SEEK_SET)); fclose(fp); #else GTEST_SKIP() << "glibc uses fopencookie instead"; #endif } TEST(STDIO_TEST, funopen_EINVAL) { #if defined(__BIONIC__) ASSERT_ERRNO_FAILURE(EINVAL, nullptr, funopen(nullptr, nullptr, nullptr, nullptr, null #else GTEST_SKIP() << "glibc uses fopencookie instead"; #endif } TEST(STDIO_TEST, funopen_seek) { #if defined(__BIONIC__) auto read_fn = [](void*, char*, int) { return -1; }; auto seek_fn = [](void*, fpos_t, int) -> fpos_t { return 0xfedcba12; }; auto seek64_fn = [](void*, fpos64_t, int) -> fpos64_t { return 0xfedcba12345678; }; FILE* fp = funopen(nullptr, read_fn, nullptr, seek_fn, nullptr); ASSERT_TRUE(fp != nullptr); fpos_t pos; #if defined(__LP64__) EXPECT_EQ(0, fgetpos(fp, &pos)) << strerror(errno); EXPECT_EQ(0xfedcba12LL, pos); #else EXPECT_ERRNO_FAILURE(EOVERFLOW, -1, fgetpos(fp, &pos)); #endif FILE* fp64 = funopen64(nullptr, read_fn, nullptr, seek64_fn, nullptr); ASSERT_TRUE(fp64 != nullptr); fpos64_t pos64; EXPECT_EQ(0, fgetpos64(fp64, &pos64)) << strerror(errno); EXPECT_EQ(0xfedcba12345678, pos64); #else GTEST_SKIP() << "glibc uses fopencookie instead"; #endif } TEST(STDIO_TEST, lots_of_concurrent_files) { std::vector<TemporaryFile*> tfs; std::vector<FILE*> fps; for (size_t i = 0; i < 256; ++i) { TemporaryFile* tf = new TemporaryFile; tfs.push_back(tf); FILE* fp = fopen(tf->path, "w+"); fps.push_back(fp); fprintf(fp, "hello %zu!\n", i); fflush(fp); } for (size_t i = 0; i < 256; ++i) { char expected[BUFSIZ]; snprintf(expected, sizeof(expected), "hello %zu!\n", i); AssertFileIs(fps[i], expected); fclose(fps[i]); delete tfs[i]; } } static void AssertFileOffsetAt(FILE* fp, off64_t offset) { EXPECT_EQ(offset, ftell(fp)); EXPECT_EQ(offset, ftello(fp)); EXPECT_EQ(offset, ftello64(fp)); fpos_t pos; fpos64_t pos64; EXPECT_EQ(0, fgetpos(fp, &pos)); EXPECT_EQ(0, fgetpos64(fp, &pos64)); #if defined(__BIONIC__) EXPECT_EQ(offset, static_cast<off64_t>(pos)); EXPECT_EQ(offset, static_cast<off64_t>(pos64)); #else GTEST_SKIP() << "glibc's fpos_t is opaque"; #endif } TEST(STDIO_TEST, seek_tell_family_smoke) { TemporaryFile tf; FILE* fp = fdopen(tf.fd, "w+"); // Initially we should be at 0. AssertFileOffsetAt(fp, 0); // Seek to offset 8192. ASSERT_EQ(0, fseek(fp, 8192, SEEK_SET)); AssertFileOffsetAt(fp, 8192); fpos_t eight_k_pos; ASSERT_EQ(0, fgetpos(fp, &eight_k_pos)); // Seek forward another 8192... ASSERT_EQ(0, fseek(fp, 8192, SEEK_CUR)); AssertFileOffsetAt(fp, 8192 + 8192); fpos64_t sixteen_k_pos64; ASSERT_EQ(0, fgetpos64(fp, &sixteen_k_pos64)); // Seek back 8192... ASSERT_EQ(0, fseek(fp, -8192, SEEK_CUR)); AssertFileOffsetAt(fp, 8192); // Since we haven't written anything, the end is also at 0. ASSERT_EQ(0, fseek(fp, 0, SEEK_END)); AssertFileOffsetAt(fp, 0); // Check that our fpos64_t from 16KiB works... ASSERT_EQ(0, fsetpos64(fp, &sixteen_k_pos64)); AssertFileOffsetAt(fp, 8192 + 8192); // ...as does our fpos_t from 8192. ASSERT_EQ(0, fsetpos(fp, &eight_k_pos)); AssertFileOffsetAt(fp, 8192); // Do fseeko and fseeko64 work too? ASSERT_EQ(0, fseeko(fp, 1234, SEEK_SET)); AssertFileOffsetAt(fp, 1234); ASSERT_EQ(0, fseeko64(fp, 5678, SEEK_SET)); AssertFileOffsetAt(fp, 5678); fclose(fp); } TEST(STDIO_TEST, fseek_fseeko_EINVAL) { TemporaryFile tf; FILE* fp = fdopen(tf.fd, "w+"); // Bad whence. ASSERT_ERRNO_FAILURE(EINVAL, -1, fseek(fp, 0, 123)); ASSERT_ERRNO_FAILURE(EINVAL, -1, fseeko(fp, 0, 123)); ASSERT_ERRNO_FAILURE(EINVAL, -1, fseeko64(fp, 0, 123)); // Bad offset. ASSERT_ERRNO_FAILURE(EINVAL, -1, fseek(fp, -1, SEEK_SET)); ASSERT_ERRNO_FAILURE(EINVAL, -1, fseeko(fp, -1, SEEK_SET)); ASSERT_ERRNO_FAILURE(EINVAL, -1, fseeko64(fp, -1, SEEK_SET)); fclose(fp); } TEST(STDIO_TEST, ctermid) { ASSERT_STREQ("/dev/tty", ctermid(nullptr)); char buf[L_ctermid] = {}; ASSERT_EQ(buf, ctermid(buf)); ASSERT_STREQ("/dev/tty", buf); } TEST(STDIO_TEST, remove) { struct stat sb; TemporaryFile tf; ASSERT_EQ(0, remove(tf.path)); ASSERT_ERRNO_FAILURE(ENOENT, -1, lstat(tf.path, &sb)); TemporaryDir td; ASSERT_EQ(0, remove(td.path)); ASSERT_ERRNO_FAILURE(ENOENT, -1, lstat(td.path, &sb)); ASSERT_ERRNO_FAILURE(ENOENT, -1, remove(tf.path)); ASSERT_ERRNO_FAILURE(ENOENT, -1, remove(td.path)); } TEST_F(STDIO_DEATHTEST, snprintf_30445072_known_buffer_size) { char buf[16]; ASSERT_EXIT(snprintf(buf, atol("-1"), "hello"), testing::KilledBySignal(SIGABRT), #if defined(NOFORTIFY) "FORTIFY: vsnprintf: size .* > SSIZE_MAX" #else "FORTIFY: vsnprintf: prevented .*-byte write into 16-byte buffer" #endif ); } TEST_F(STDIO_DEATHTEST, snprintf_30445072_unknown_buffer_size) { std::string buf = "hello"; // So the compiler doesn't know the buffer size. ASSERT_EXIT(snprintf(&buf[0], atol("-1"), "hello"), testing::KilledBySignal(SIGABRT), "FORTIFY: vsnprintf: size .* > SSIZE_MAX"); } TEST(STDIO_TEST, sprintf_30445072) { std::string buf = "world"; sprintf(&buf[0], "hello"); ASSERT_EQ(buf, "hello"); } TEST(STDIO_TEST, printf_m) { errno = 0; EXPECT_SNPRINTF("<Success>", "<%m>"); errno = -1; EXPECT_SNPRINTF("<Unknown error -1>", "<%m>"); errno = EINVAL; EXPECT_SNPRINTF("<Invalid argument>", "<%m>"); } TEST(STDIO_TEST, wprintf_m) { errno = 0; EXPECT_SWPRINTF(L"<Success>", L"<%m>"); errno = -1; EXPECT_SWPRINTF(L"<Unknown error -1>", L"<%m>"); errno = EINVAL; EXPECT_SWPRINTF(L"<Invalid argument>", L"<%m>"); } TEST(STDIO_TEST, printf_hash_m) { errno = 0; EXPECT_SNPRINTF("<0>", "<%#m>"); errno = -1; EXPECT_SNPRINTF("<-1>", "<%#m>"); errno = EINVAL; EXPECT_SNPRINTF("<EINVAL>", "<%#m>"); } TEST(STDIO_TEST, wprintf_hash_m) { errno = 0; EXPECT_SWPRINTF(L"<0>", L"<%#m>"); errno = -1; EXPECT_SWPRINTF(L"<-1>", L"<%#m>"); errno = EINVAL; EXPECT_SWPRINTF(L"<EINVAL>", L"<%#m>"); } TEST(STDIO_TEST, printf_m_does_not_clobber_strerror) { const char* m = strerror(-1); ASSERT_STREQ("Unknown error -1", m); errno = -2; EXPECT_SNPRINTF("<Unknown error -2>", "<%m>"); ASSERT_STREQ("Unknown error -1", m); } TEST(STDIO_TEST, wprintf_m_does_not_clobber_strerror) { const char* m = strerror(-1); ASSERT_STREQ("Unknown error -1", m); errno = -2; EXPECT_SWPRINTF(L"<Unknown error -2>", L"<%m>"); ASSERT_STREQ("Unknown error -1", m); } TEST(STDIO_TEST, snprintf_hash_o) { EXPECT_SNPRINTF("07", "%#o", 7); } TEST(STDIO_TEST, swprintf_hash_o) { EXPECT_SWPRINTF(L"07", L"%#o", 7); } TEST(STDIO_TEST, snprintf_hash_x) { EXPECT_SNPRINTF("0x7", "%#x", 7); } TEST(STDIO_TEST, swprintf_hash_x) { EXPECT_SWPRINTF(L"0x7", L"%#x", 7); } TEST(STDIO_TEST, snprintf_hash_X) { EXPECT_SNPRINTF("0X7", "%#X", 7); } TEST(STDIO_TEST, swprintf_hash_X) { EXPECT_SWPRINTF(L"0X7", L"%#X", 7); } TEST(STDIO_TEST, fopen_append_mode_and_ftell) { TemporaryFile tf; SetFileTo(tf.path, "0123456789"); FILE* fp = fopen(tf.path, "a"); EXPECT_EQ(10, ftell(fp)); ASSERT_EQ(0, fseek(fp, 2, SEEK_SET)); EXPECT_EQ(2, ftell(fp)); ASSERT_NE(EOF, fputs("xxx", fp)); ASSERT_EQ(0, fflush(fp)); EXPECT_EQ(13, ftell(fp)); ASSERT_EQ(0, fseek(fp, 0, SEEK_END)); EXPECT_EQ(13, ftell(fp)); ASSERT_EQ(0, fclose(fp)); AssertFileIs(tf.path, "0123456789xxx"); } TEST(STDIO_TEST, fdopen_append_mode_and_ftell) { TemporaryFile tf; SetFileTo(tf.path, "0123456789"); int fd = open(tf.path, O_RDWR); ASSERT_NE(-1, fd); // POSIX: "The file position indicator associated with the new stream is set to the position // indicated by the file offset associated with the file descriptor." ASSERT_EQ(4, lseek(fd, 4, SEEK_SET)); FILE* fp = fdopen(fd, "a"); EXPECT_EQ(4, ftell(fp)); ASSERT_EQ(0, fseek(fp, 2, SEEK_SET)); EXPECT_EQ(2, ftell(fp)); ASSERT_NE(EOF, fputs("xxx", fp)); ASSERT_EQ(0, fflush(fp)); EXPECT_EQ(13, ftell(fp)); ASSERT_EQ(0, fseek(fp, 0, SEEK_END)); EXPECT_EQ(13, ftell(fp)); ASSERT_EQ(0, fclose(fp)); AssertFileIs(tf.path, "0123456789xxx"); } TEST(STDIO_TEST, freopen_append_mode_and_ftell) { TemporaryFile tf; SetFileTo(tf.path, "0123456789"); FILE* other_fp = fopen("/proc/version", "r"); FILE* fp = freopen(tf.path, "a", other_fp); EXPECT_EQ(10, ftell(fp)); ASSERT_EQ(0, fseek(fp, 2, SEEK_SET)); EXPECT_EQ(2, ftell(fp)); ASSERT_NE(EOF, fputs("xxx", fp)); ASSERT_EQ(0, fflush(fp)); EXPECT_EQ(13, ftell(fp)); ASSERT_EQ(0, fseek(fp, 0, SEEK_END)); EXPECT_EQ(13, ftell(fp)); ASSERT_EQ(0, fclose(fp)); AssertFileIs(tf.path, "0123456789xxx"); } TEST(STDIO_TEST, constants) { ASSERT_LE(FILENAME_MAX, PATH_MAX); ASSERT_EQ(L_tmpnam, PATH_MAX); } TEST(STDIO_TEST, perror) { android::base::CapturedStderr cap; errno = EINVAL; perror("a b c"); ASSERT_EQ(cap.str(), "a b c: Invalid argument\n"); } TEST(STDIO_TEST, perror_null) { android::base::CapturedStderr cap; errno = EINVAL; perror(nullptr); ASSERT_EQ(cap.str(), "Invalid argument\n"); } TEST(STDIO_TEST, perror_empty) { android::base::CapturedStderr cap; errno = EINVAL; perror(""); ASSERT_EQ(cap.str(), "Invalid argument\n"); } TEST(STDIO_TEST, puts) { android::base::CapturedStdout cap; puts("a b c"); fflush(stdout); ASSERT_EQ(cap.str(), "a b c\n"); } TEST(STDIO_TEST, putchar) { android::base::CapturedStdout cap; ASSERT_EQ(65, putchar('A')); fflush(stdout); ASSERT_EQ(cap.str(), "A"); } TEST(STDIO_TEST, putchar_unlocked) { android::base::CapturedStdout cap; ASSERT_EQ(66, putchar_unlocked('B')); fflush(stdout); ASSERT_EQ(cap.str(), "B"); } TEST(STDIO_TEST, unlocked) { TemporaryFile tf; FILE* fp = fopen(tf.path, "w+"); ASSERT_TRUE(fp != nullptr); clearerr_unlocked(fp); ASSERT_FALSE(feof_unlocked(fp)); ASSERT_FALSE(ferror_unlocked(fp)); ASSERT_EQ(fileno(fp), fileno_unlocked(fp)); ASSERT_NE(EOF, putc_unlocked('a', fp)); ASSERT_NE(EOF, putc('b', fp)); ASSERT_NE(EOF, fputc_unlocked('c', fp)); ASSERT_NE(EOF, fputc('d', fp)); rewind(fp); ASSERT_EQ('a', getc_unlocked(fp)); ASSERT_EQ('b', getc(fp)); ASSERT_EQ('c', fgetc_unlocked(fp)); ASSERT_EQ('d', fgetc(fp)); rewind(fp); ASSERT_EQ(2U, fwrite_unlocked("AB", 1, 2, fp)); ASSERT_EQ(2U, fwrite("CD", 1, 2, fp)); ASSERT_EQ(0, fflush_unlocked(fp)); rewind(fp); char buf[BUFSIZ] = {}; ASSERT_EQ(2U, fread_unlocked(&buf[0], 1, 2, fp)); ASSERT_EQ(2U, fread(&buf[2], 1, 2, fp)); ASSERT_STREQ("ABCD", buf); rewind(fp); ASSERT_NE(EOF, fputs("hello ", fp)); ASSERT_NE(EOF, fputs_unlocked("world", fp)); ASSERT_NE(EOF, fputc('\n', fp)); rewind(fp); ASSERT_TRUE(fgets_unlocked(buf, sizeof(buf), fp) != nullptr); ASSERT_STREQ("hello world\n", buf); ASSERT_EQ(0, fclose(fp)); } TEST(STDIO_TEST, fseek_64bit) { TemporaryFile tf; FILE* fp = fopen64(tf.path, "w+"); ASSERT_TRUE(fp != nullptr); ASSERT_EQ(0, fseeko64(fp, 0x2'0000'0000, SEEK_SET)); ASSERT_EQ(0x2'0000'0000, ftello64(fp)); ASSERT_EQ(0, fseeko64(fp, 0x1'0000'0000, SEEK_CUR)); ASSERT_EQ(0x3'0000'0000, ftello64(fp)); ASSERT_EQ(0, fclose(fp)); } // POSIX requires that fseek/fseeko fail with EOVERFLOW if the new file offset // isn't representable in long/off_t. TEST(STDIO_TEST, fseek_overflow_32bit) { TemporaryFile tf; FILE* fp = fopen64(tf.path, "w+"); ASSERT_EQ(0, ftruncate64(fileno(fp), 0x2'0000'0000)); // Bionic implements overflow checking for SEEK_CUR, but glibc doesn't. #if defined(__BIONIC__) && !defined(__LP64__) ASSERT_EQ(0, fseek(fp, 0x7fff'ffff, SEEK_SET)); ASSERT_ERRNO_FAILURE(EOVERFLOW, -1, fseek(fp, 1, SEEK_CUR)); #endif // Neither Bionic nor glibc implement the overflow checking for SEEK_END. // (Aside: FreeBSD's libc is an example of a libc that checks both SEEK_CUR // and SEEK_END -- many C libraries check neither.) ASSERT_EQ(0, fseek(fp, 0, SEEK_END)); ASSERT_EQ(0x2'0000'0000, ftello64(fp)); fclose(fp); } TEST(STDIO_TEST, dev_std_files) { // POSIX only mentions /dev/stdout, but we should have all three (http://b/31824379). char path[PATH_MAX]; ssize_t length = readlink("/dev/stdin", path, sizeof(path)); ASSERT_LT(0, length); ASSERT_EQ("/proc/self/fd/0", std::string(path, length)); length = readlink("/dev/stdout", path, sizeof(path)); ASSERT_LT(0, length); ASSERT_EQ("/proc/self/fd/1", std::string(path, length)); length = readlink("/dev/stderr", path, sizeof(path)); ASSERT_LT(0, length); ASSERT_EQ("/proc/self/fd/2", std::string(path, length)); } TEST(STDIO_TEST, fread_with_locked_file) { // Reading an unbuffered/line-buffered file from one thread shouldn't block on // files locked on other threads, even if it flushes some line-buffered files. FILE* fp1 = fopen("/dev/zero", "r"); ASSERT_TRUE(fp1 != nullptr); flockfile(fp1); std::thread([] { for (int mode : { _IONBF, _IOLBF }) { FILE* fp2 = fopen("/dev/zero", "r"); ASSERT_TRUE(fp2 != nullptr); setvbuf(fp2, nullptr, mode, 0); ASSERT_EQ('\0', fgetc(fp2)); fclose(fp2); } }).join(); funlockfile(fp1); fclose(fp1); } TEST(STDIO_TEST, SEEK_macros) { ASSERT_EQ(0, SEEK_SET); ASSERT_EQ(1, SEEK_CUR); ASSERT_EQ(2, SEEK_END); ASSERT_EQ(3, SEEK_DATA); ASSERT_EQ(4, SEEK_HOLE); // So we'll notice if Linux grows another constant in <linux/fs.h>... ASSERT_EQ(SEEK_MAX, SEEK_HOLE); } TEST(STDIO_TEST, rename) { TemporaryDir td; std::string old_path = td.path + "/old"s; std::string new_path = td.path + "/new"s; // Create the file, check it exists. ASSERT_EQ(0, close(creat(old_path.c_str(), 0666))); struct stat sb; ASSERT_EQ(0, stat(old_path.c_str(), &sb)); ASSERT_EQ(-1, stat(new_path.c_str(), &sb)); // Rename and check it moved. ASSERT_EQ(0, rename(old_path.c_str(), new_path.c_str())); ASSERT_EQ(-1, stat(old_path.c_str(), &sb)); ASSERT_EQ(0, stat(new_path.c_str(), &sb)); } TEST(STDIO_TEST, renameat) { TemporaryDir td; android::base::unique_fd dirfd{open(td.path, O_PATH)}; std::string old_path = td.path + "/old"s; std::string new_path = td.path + "/new"s; // Create the file, check it exists. ASSERT_EQ(0, close(creat(old_path.c_str(), 0666))); struct stat sb; ASSERT_EQ(0, stat(old_path.c_str(), &sb)); ASSERT_EQ(-1, stat(new_path.c_str(), &sb)); // Rename and check it moved. ASSERT_EQ(0, renameat(dirfd, "old", dirfd, "new")); ASSERT_EQ(-1, stat(old_path.c_str(), &sb)); ASSERT_EQ(0, stat(new_path.c_str(), &sb)); } TEST(STDIO_TEST, renameat2) { #if defined(__GLIBC__) || defined(ANDROID_HOST_MUSL) GTEST_SKIP() << "glibc doesn't have renameat2 until 2.28 and musl doesn't have renameat2"; #else TemporaryDir td; android::base::unique_fd dirfd{open(td.path, O_PATH)}; std::string old_path = td.path + "/old"s; std::string new_path = td.path + "/new"s; // Create the file, check it exists. ASSERT_EQ(0, close(creat(old_path.c_str(), 0666))); struct stat sb; ASSERT_EQ(0, stat(old_path.c_str(), &sb)); ASSERT_EQ(-1, stat(new_path.c_str(), &sb)); // Rename and check it moved. ASSERT_EQ(0, renameat2(dirfd, "old", dirfd, "new", 0)); ASSERT_EQ(-1, stat(old_path.c_str(), &sb)); ASSERT_EQ(0, stat(new_path.c_str(), &sb)); // After this, both "old" and "new" exist. ASSERT_EQ(0, close(creat(old_path.c_str(), 0666))); // Rename and check it moved. ASSERT_ERRNO_FAILURE(EEXIST, -1, renameat2(dirfd, "old", dirfd, "new", RENAME_NOREPLAC #endif } TEST(STDIO_TEST, renameat2_flags) { #if defined(__GLIBC__) GTEST_SKIP() << "glibc doesn't have renameat2 until 2.28"; #else ASSERT_NE(0, RENAME_EXCHANGE); ASSERT_NE(0, RENAME_NOREPLACE); ASSERT_NE(0, RENAME_WHITEOUT); #endif } TEST(STDIO_TEST, fdopen_failures) { int fd = open("/proc/version", O_RDONLY); ASSERT_TRUE(fd != -1); // Nonsense mode. ASSERT_ERRNO_FAILURE(EINVAL, nullptr, fdopen(fd, "nonsense")); // Mode that isn't a subset of the fd's actual mode. ASSERT_ERRNO_FAILURE(EINVAL, nullptr, fdopen(fd, "w")); // Can't set append on the underlying fd. ASSERT_ERRNO_FAILURE(EINVAL, nullptr, fdopen(fd, "a")); // Bad fd. ASSERT_ERRNO_FAILURE(EBADF, nullptr, fdopen(-1, "re")); close(fd); } TEST(STDIO_TEST, fmemopen_invalid_mode) { ASSERT_ERRNO_FAILURE(EINVAL, nullptr, fmemopen(nullptr, 16, "nonsense")); } TEST(STDIO_TEST, fopen_invalid_mode) { ASSERT_ERRNO_FAILURE(EINVAL, nullptr, fopen("/proc/version", "nonsense")); } TEST(STDIO_TEST, freopen_invalid_mode) { FILE* fp = fopen("/proc/version", "re"); ASSERT_TRUE(fp != nullptr); ASSERT_ERRNO_FAILURE(EINVAL, nullptr, freopen("/proc/version", "nonsense", fp)); } TEST(STDIO_TEST, asprintf_smoke) { char* p = nullptr; ASSERT_EQ(11, asprintf(&p, "hello %s", "world")); ASSERT_STREQ("hello world", p); free(p); } TEST(STDIO_TEST, asprintf_huge) { std::string huge(2048u, 'x'); std::string expected = huge + " hello " + huge; char* p; int n = asprintf(&p, "%s hello %s", huge.c_str(), huge.c_str()); ASSERT_EQ(2048 + 7 + 2048, n); ASSERT_STREQ(expected.c_str(), p); free(p); } TEST(STDIO_TEST, fopen_ENOENT) { ASSERT_ERRNO_FAILURE(ENOENT, nullptr, fopen("/proc/does-not-exist", "re")); } static void tempnam_test(bool has_TMPDIR, const char* dir, const char* prefix, const char* r if (has_TMPDIR) { setenv("TMPDIR", "/my/tmp/dir", 1); } else { unsetenv("TMPDIR"); } char* s1 = tempnam(dir, prefix); char* s2 = tempnam(dir, prefix); ASSERT_MATCH(s1, re); ASSERT_MATCH(s2, re); ASSERT_STRNE(s1, s2); free(s1); free(s2); } TEST(STDIO_TEST, tempnam__system_directory_system_prefix_with_TMPDIR) { tempnam_test(true, nullptr, nullptr, "^/my/tmp/dir/.*"); } TEST(STDIO_TEST, tempnam__system_directory_system_prefix_without_TMPDIR) { tempnam_test(false, nullptr, nullptr, "^/data/local/tmp/.*"); } TEST(STDIO_TEST, tempnam__system_directory_user_prefix_with_TMPDIR) { tempnam_test(true, nullptr, "prefix", "^/my/tmp/dir/prefix.*"); } TEST(STDIO_TEST, tempnam__system_directory_user_prefix_without_TMPDIR) { tempnam_test(false, nullptr, "prefix", "^/data/local/tmp/prefix.*"); } TEST(STDIO_TEST, tempnam__user_directory_system_prefix_with_TMPDIR) { tempnam_test(true, "/a/b/c", nullptr, "^/my/tmp/dir/.*"); } TEST(STDIO_TEST, tempnam__user_directory_system_prefix_without_TMPDIR) { tempnam_test(false, "/a/b/c", nullptr, "^/a/b/c/.*"); } TEST(STDIO_TEST, tempnam__user_directory_user_prefix_with_TMPDIR) { tempnam_test(true, "/a/b/c", "prefix", "^/my/tmp/dir/prefix.*"); } TEST(STDIO_TEST, tempnam__user_directory_user_prefix_without_TMPDIR) { tempnam_test(false, "/a/b/c", "prefix", "^/a/b/c/prefix.*"); } static void tmpnam_test(char* s) { char s1[L_tmpnam], s2[L_tmpnam]; strcpy(s1, tmpnam(s)); strcpy(s2, tmpnam(s)); ASSERT_MATCH(s1, "/tmp/.*"); ASSERT_MATCH(s2, "/tmp/.*"); ASSERT_STRNE(s1, s2); } TEST(STDIO_TEST, tmpnam) { tmpnam_test(nullptr); } TEST(STDIO_TEST, tmpnam_buf) { char buf[L_tmpnam]; tmpnam_test(buf); } TEST(STDIO_TEST, freopen_null_filename_mode) { TemporaryFile tf; FILE* fp = fopen(tf.path, "r"); ASSERT_TRUE(fp != nullptr); // "r" = O_RDONLY char buf[1]; ASSERT_EQ(0, read(fileno(fp), buf, 1)); ASSERT_EQ(-1, write(fileno(fp), "hello", 1)); // "r+" = O_RDWR fp = freopen(nullptr, "r+", fp); ASSERT_EQ(0, read(fileno(fp), buf, 1)); ASSERT_EQ(1, write(fileno(fp), "hello", 1)); // "w" = O_WRONLY fp = freopen(nullptr, "w", fp); ASSERT_EQ(-1, read(fileno(fp), buf, 1)); ASSERT_EQ(1, write(fileno(fp), "hello", 1)); fclose(fp); } #if defined(__LP64__) static int64_t GetTotalRamGiB() { struct sysinfo si; sysinfo(&si); return (static_cast<int64_t>(si.totalram) * si.mem_unit) / 1024 / 1024 / 1024; } #endif TEST(STDIO_TEST, fread_EOVERFLOW) { TemporaryFile tf; FILE* fp = fopen(tf.path, "r"); ASSERT_TRUE(fp != nullptr); volatile size_t big = SIZE_MAX; char buf[BUFSIZ]; ASSERT_ERRNO_FAILURE(EOVERFLOW, 0u, fread(buf, big, big, fp)); ASSERT_TRUE(ferror(fp)); fclose(fp); } TEST(STDIO_TEST, fwrite_EOVERFLOW) { TemporaryFile tf; FILE* fp = fopen(tf.path, "w"); ASSERT_TRUE(fp != nullptr); volatile size_t big = SIZE_MAX; char buf[BUFSIZ]; ASSERT_ERRNO_FAILURE(EOVERFLOW, 0u, fwrite(buf, big, big, fp)); ASSERT_TRUE(ferror(fp)); fclose(fp); } TEST(STDIO_TEST, fread_fwrite_int_overflow) { #if defined(__LP64__) if (GetTotalRamGiB() <= 4) GTEST_SKIP() << "not enough memory"; // Historically the implementation used ints where it should have used size_t. const size_t too_big_for_an_int = 0x80000000ULL; std::vector<char> buf(too_big_for_an_int); // We test both fread() and fwrite() in the same function to avoid two tests // both allocating 2GiB of ram at the same time. { std::unique_ptr<FILE, decltype(&fclose)> fp{fopen("/dev/zero", "re"), fclose}; ASSERT_EQ(too_big_for_an_int, fread(&buf[0], 1, too_big_for_an } { std::unique_ptr<FILE, decltype(&fclose)> fp{fopen("/dev/null", "we"), fclose}; ASSERT_EQ(too_big_for_an_int, fwrite(&buf[0], 1, too_big_for_a } #else GTEST_SKIP() << "32-bit can't allocate 2GiB"; #endif } TEST(STDIO_TEST, snprintf_b_B) { #if defined(__BIONIC__) uint8_t b = 5; EXPECT_SNPRINTF("<101>", "<%" PRIb8 ">", b); EXPECT_SNPRINTF("<101>", "<%" PRIB8 ">", b); EXPECT_SNPRINTF("<00000101>", "<%08" PRIb8 ">", b); EXPECT_SNPRINTF("<00000101>", "<%08" PRIB8 ">", b); uint16_t s = 0xaaaa; EXPECT_SNPRINTF("<1010101010101010>", "<%" PRIb16 ">", s); EXPECT_SNPRINTF("<1010101010101010>", "<%" PRIB16 ">", s); EXPECT_SNPRINTF("<0b1010101010101010>", "<%#" PRIb16 ">", s); EXPECT_SNPRINTF("<0B1010101010101010>", "<%#" PRIB16 ">", s); EXPECT_SNPRINTF("<10101010101010101010101010101010>", "<%" PRIb32 ">", 0xaaaaaaaa); EXPECT_SNPRINTF("<10101010101010101010101010101010>", "<%" PRIB32 ">", 0xaaaaaaaa); EXPECT_SNPRINTF("<0b10101010101010101010101010101010>", "<%#" PRIb32 ">", 0xaaaaaaaa); EXPECT_SNPRINTF("<0B10101010101010101010101010101010>", "<%#" PRIB32 ">", 0xaaaaaaaa); // clang doesn't like "%lb" (https://github.com/llvm/llvm-project/issues/62247) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat" EXPECT_SNPRINTF("<101010101010101010101010101010101010101010101010101010101010101 "<%" PRIb64 ">", 0xaaaaaaaa'aaaaaaaa); EXPECT_SNPRINTF("<101010101010101010101010101010101010101010101010101010101010101 "<%" PRIB64 ">", 0xaaaaaaaa'aaaaaaaa); EXPECT_SNPRINTF("<0b1010101010101010101010101010101010101010101010101010101010101 "<%#" PRIb64 ">", 0xaaaaaaaa'aaaaaaaa); EXPECT_SNPRINTF("<0B1010101010101010101010101010101010101010101010101010101010101 "<%#" PRIB64 ">", 0xaaaaaaaa'aaaaaaaa); #pragma clang diagnostic pop EXPECT_SNPRINTF("<0>", "<%#b>", 0); EXPECT_SNPRINTF("<0>", "<%#B>", 0); #else GTEST_SKIP() << "no %b in glibc"; #endif } TEST(STDIO_TEST, swprintf_b_B) { #if defined(__BIONIC__) uint8_t b = 5; EXPECT_SWPRINTF(L"<101>", L"<%" PRIb8 ">", b); EXPECT_SWPRINTF(L"<101>", L"<%" PRIB8 ">", b); EXPECT_SWPRINTF(L"<0b101>", L"<%#" PRIb8 ">", b); EXPECT_SWPRINTF(L"<0B101>", L"<%#" PRIB8 ">", b); EXPECT_SWPRINTF(L"<00000101>", L"<%08" PRIb8 ">", b); EXPECT_SWPRINTF(L"<00000101>", L"<%08" PRIB8 ">", b); uint16_t s = 0xaaaa; EXPECT_SWPRINTF(L"<1010101010101010>", L"<%" PRIb16 ">", s); EXPECT_SWPRINTF(L"<1010101010101010>", L"<%" PRIB16 ">", s); EXPECT_SWPRINTF(L"<0b1010101010101010>", L"<%#" PRIb16 ">", s); EXPECT_SWPRINTF(L"<0B1010101010101010>", L"<%#" PRIB16 ">", s); EXPECT_SWPRINTF(L"<10101010101010101010101010101010>", L"<%" PRIb32 ">", 0xaaaaaaaa); EXPECT_SWPRINTF(L"<10101010101010101010101010101010>", L"<%" PRIB32 ">", 0xaaaaaaaa); EXPECT_SWPRINTF(L"<0b10101010101010101010101010101010>", L"<%#" PRIb32 ">", 0xaaaaaaaa); EXPECT_SWPRINTF(L"<0B10101010101010101010101010101010>", L"<%#" PRIB32 ">", 0xaaaaaaaa); // clang doesn't like "%lb" (https://github.com/llvm/llvm-project/issues/62247) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat" EXPECT_SWPRINTF(L"<10101010101010101010101010101010101010101010101010101010101010 L"<%" PRIb64 ">", 0xaaaaaaaa'aaaaaaaa); EXPECT_SWPRINTF(L"<10101010101010101010101010101010101010101010101010101010101010 L"<%" PRIB64 ">", 0xaaaaaaaa'aaaaaaaa); EXPECT_SWPRINTF(L"<0b101010101010101010101010101010101010101010101010101010101010 L"<%#" PRIb64 ">", 0xaaaaaaaa'aaaaaaaa); EXPECT_SWPRINTF(L"<0B101010101010101010101010101010101010101010101010101010101010 L"<%#" PRIB64 ">", 0xaaaaaaaa'aaaaaaaa); #pragma clang diagnostic pop EXPECT_SWPRINTF(L"<0>", L"<%#b>", 0); EXPECT_SWPRINTF(L"<0>", L"<%#B>", 0); #else GTEST_SKIP() << "no %b in glibc"; #endif } TEST(STDIO_TEST, scanf_i_decimal) { int i; EXPECT_EQ(1, sscanf("<123789>", "<%i>", &i)); EXPECT_EQ(123789, i); long long int lli; char ch; EXPECT_EQ(2, sscanf("1234567890abcdefg", "%lli%c", &lli, &ch)); EXPECT_EQ(1234567890, lli); EXPECT_EQ('a', ch); } TEST(STDIO_TEST, scanf_i_hex) { int i; EXPECT_EQ(1, sscanf("<0x123abf>", "<%i>", &i)); EXPECT_EQ(0x123abf, i); long long int lli; char ch; EXPECT_EQ(2, sscanf("0x1234567890abcdefg", "%lli%c", &lli, &ch)); EXPECT_EQ(0x1234567890abcdefLL, lli); EXPECT_EQ('g', ch); } TEST(STDIO_TEST, scanf_i_octal) { int i; EXPECT_EQ(1, sscanf("<01234567>", "<%i>", &i)); EXPECT_EQ(01234567, i); long long int lli; char ch; EXPECT_EQ(2, sscanf("010234567890abcdefg", "%lli%c", &lli, &ch)); EXPECT_EQ(010234567, lli); EXPECT_EQ('8', ch); } TEST(STDIO_TEST, scanf_i_binary) { int i; EXPECT_EQ(1, sscanf("<0b101>", "<%i>", &i)); EXPECT_EQ(0b101, i); long long int lli; char ch; EXPECT_EQ(2, sscanf("0b10234567890abcdefg", "%lli%c", &lli, &ch)); EXPECT_EQ(0b10, lli); EXPECT_EQ('2', ch); } TEST(STDIO_TEST, wscanf_i_decimal) { int i; EXPECT_EQ(1, swscanf(L"<123789>", L"<%i>", &i)); EXPECT_EQ(123789, i); long long int lli; char ch; EXPECT_EQ(2, swscanf(L"1234567890abcdefg", L"%lli%c", &lli, &ch)); EXPECT_EQ(1234567890, lli); EXPECT_EQ('a', ch); } TEST(STDIO_TEST, wscanf_i_hex) { int i; EXPECT_EQ(1, swscanf(L"<0x123abf>", L"<%i>", &i)); EXPECT_EQ(0x123abf, i); long long int lli; char ch; EXPECT_EQ(2, swscanf(L"0x1234567890abcdefg", L"%lli%c", &lli, &ch)); EXPECT_EQ(0x1234567890abcdefLL, lli); EXPECT_EQ('g', ch); } TEST(STDIO_TEST, wscanf_i_octal) { int i; EXPECT_EQ(1, swscanf(L"<01234567>", L"<%i>", &i)); EXPECT_EQ(01234567, i); long long int lli; char ch; EXPECT_EQ(2, swscanf(L"010234567890abcdefg", L"%lli%c", &lli, &ch)); EXPECT_EQ(010234567, lli); EXPECT_EQ('8', ch); } TEST(STDIO_TEST, wscanf_i_binary) { int i; EXPECT_EQ(1, swscanf(L"<0b101>", L"<%i>", &i)); EXPECT_EQ(0b101, i); long long int lli; char ch; EXPECT_EQ(2, swscanf(L"0b10234567890abcdefg", L"%lli%c", &lli, &ch)); EXPECT_EQ(0b10, lli); EXPECT_EQ('2', ch); } TEST(STDIO_TEST, scanf_b) { int i; char ch; EXPECT_EQ(2, sscanf("<1012>", "<%b%c>", &i, &ch)); EXPECT_EQ(0b101, i); EXPECT_EQ('2', ch); EXPECT_EQ(1, sscanf("<00000101>", "<%08b>", &i)); EXPECT_EQ(0b00000101, i); EXPECT_EQ(1, sscanf("<0b1010>", "<%b>", &i)); EXPECT_EQ(0b1010, i); EXPECT_EQ(2, sscanf("-0b", "%i%c", &i, &ch)); EXPECT_EQ(0, i); EXPECT_EQ('b', ch); } TEST(STDIO_TEST, swscanf_b) { int i; char ch; EXPECT_EQ(2, swscanf(L"<1012>", L"<%b%c>", &i, &ch)); EXPECT_EQ(0b101, i); EXPECT_EQ('2', ch); EXPECT_EQ(1, swscanf(L"<00000101>", L"<%08b>", &i)); EXPECT_EQ(0b00000101, i); EXPECT_EQ(1, swscanf(L"<0b1010>", L"<%b>", &i)); EXPECT_EQ(0b1010, i); EXPECT_EQ(2, swscanf(L"-0b", L"%i%c", &i, &ch)); EXPECT_EQ(0, i); EXPECT_EQ('b', ch); } TEST(STDIO_TEST, snprintf_w_base) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat-invalid-specifier" #pragma clang diagnostic ignored "-Wconstant-conversion" int8_t a = 0b101; EXPECT_SNPRINTF("<101>", "<%w8b>", a); int8_t b1 = 0xFF; EXPECT_SNPRINTF("<-1>", "<%w8d>", b1); int8_t b2 = 0x1FF; EXPECT_SNPRINTF("<-1>", "<%w8d>", b2); int16_t c = 0xFFFF; EXPECT_SNPRINTF("<-1>", "<%w16i>", c); int32_t d = 021; EXPECT_SNPRINTF("<21>", "<%w32o>", d); uint32_t e = -1; EXPECT_SNPRINTF("<4294967295>", "<%w32u>", e); int64_t f = 0x3b; EXPECT_SNPRINTF("<3b>", "<%w64x>", f); EXPECT_SNPRINTF("<3B>", "<%w64X>", f); #pragma clang diagnostic pop #else GTEST_SKIP() << "no %w in glibc"; #endif } TEST(STDIO_TEST, swprintf_w_base) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat-invalid-specifier" #pragma clang diagnostic ignored "-Wconstant-conversion" int8_t a = 0b101; EXPECT_SWPRINTF(L"<101>", L"<%w8b>", a); int8_t b1 = 0xFF; EXPECT_SWPRINTF(L"<-1>", L"<%w8d>", b1); int8_t b2 = 0x1FF; EXPECT_SWPRINTF(L"<-1>", L"<%w8d>", b2); int16_t c = 0xFFFF; EXPECT_SWPRINTF(L"<-1>", L"<%w16i>", c); int32_t d = 021; EXPECT_SWPRINTF(L"<21>", L"<%w32o>", d); uint32_t e = -1; EXPECT_SWPRINTF(L"<4294967295>", L"<%w32u>", e); int64_t f = 0x3b; EXPECT_SWPRINTF(L"<3b>", L"<%w64x>", f); EXPECT_SWPRINTF(L"<3B>", L"<%w64X>", f); #pragma clang diagnostic pop #else GTEST_SKIP() << "no %w in glibc"; #endif } TEST(STDIO_TEST, snprintf_w_arguments_reordering) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat-invalid-specifier" #pragma clang diagnostic ignored "-Wformat-extra-args" int32_t a = 0xaaaaaaaa; int64_t b = 0x11111111'22222222; int64_t c = 0x33333333'44444444; int64_t d = 0xaaaaaaaa'aaaaaaaa; EXPECT_SNPRINTF("<10101010101010101010101010101010 --- 3333333344444444>", "<%2$w32b --- %1$w64x>", c, a); EXPECT_SNPRINTF( "<1010101010101010101010101010101010101010101010101010101010101010 --- 111111112222 "3333333344444444>", "<%3$w64b --- %1$w64x --- %2$w64x>", b, c, d); #pragma clang diagnostic pop #else GTEST_SKIP() << "no %w in glibc"; #endif } TEST(STDIO_TEST, swprintf_w_arguments_reordering) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat-invalid-specifier" #pragma clang diagnostic ignored "-Wformat-extra-args" int32_t a = 0xaaaaaaaa; int64_t b = 0x11111111'22222222; int64_t c = 0x33333333'44444444; int64_t d = 0xaaaaaaaa'aaaaaaaa; EXPECT_SWPRINTF(L"<10101010101010101010101010101010 --- 3333333344444444>", L"<%2$w32b --- %1$w64x>", c, a); EXPECT_SWPRINTF( L"<1010101010101010101010101010101010101010101010101010101010101010 --- 11111111222 L"3333333344444444>", L"<%3$w64b --- %1$w64x --- %2$w64x>", b, c, d); #pragma clang diagnostic pop #else GTEST_SKIP() << "no %w in glibc"; #endif } TEST_F(STDIO_DEATHTEST, snprintf_invalid_w_width) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat-invalid-specifier" char buf[BUFSIZ]; int32_t a = 100; EXPECT_EXIT(snprintf(buf, sizeof(buf), "%w20d", &a), testing::KilledBySignal(SIGABRT), "%w20 is unsupported"); #pragma clang diagnostic pop #else GTEST_SKIP() << "no %w in glibc"; #endif } TEST_F(STDIO_DEATHTEST, swprintf_invalid_w_width) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat-invalid-specifier" wchar_t buf[BUFSIZ]; int32_t a = 100; EXPECT_EXIT(swprintf(buf, sizeof(buf), L"%w20d", &a), testing::KilledBySignal(SIGABRT), "%w20 is unsupported"); #pragma clang diagnostic pop #else GTEST_SKIP() << "no %w in glibc"; #endif } TEST(STDIO_TEST, snprintf_wf_base) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wconstant-conversion" #pragma clang diagnostic ignored "-Wformat" #pragma clang diagnostic ignored "-Wformat-invalid-specifier" int_fast8_t a = 0b101; EXPECT_SNPRINTF("<101>", "<%wf8b>", a); int_fast8_t b = 0x12341234'12341234; EXPECT_SNPRINTF("<34>", "<%wf8x>", b); uint_fast16_t c = 0x11111111'22222222; #if defined(__LP64__) EXPECT_SNPRINTF("<1111111122222222>", "<%wf16x>", c); #else EXPECT_SNPRINTF("<22222222>", "<%wf16x>", c); #endif int_fast32_t d = 0x33333333'44444444; #if defined(__LP64__) EXPECT_SNPRINTF("<3333333344444444>", "<%wf32x>", d); #else EXPECT_SNPRINTF("<44444444>", "<%wf32x>", d); #endif int_fast64_t e = 0xaaaaaaaa'aaaaaaaa; EXPECT_SNPRINTF("<aaaaaaaaaaaaaaaa>", "<%wf64x>", e); EXPECT_SNPRINTF("<AAAAAAAAAAAAAAAA>", "<%wf64X>", e); #pragma clang diagnostic pop #else GTEST_SKIP() << "no %wf in glibc"; #endif } TEST(STDIO_TEST, swprintf_wf_base) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wconstant-conversion" #pragma clang diagnostic ignored "-Wformat" #pragma clang diagnostic ignored "-Wformat-invalid-specifier" int_fast8_t a = 0b101; EXPECT_SWPRINTF(L"<101>", L"<%wf8b>", a); int_fast8_t b = 0x12341234'12341234; EXPECT_SWPRINTF(L"<34>", L"<%wf8x>", b); uint_fast16_t c = 0x11111111'22222222; #if defined(__LP64__) EXPECT_SWPRINTF(L"<1111111122222222>", L"<%wf16x>", c); #else EXPECT_SWPRINTF(L"<22222222>", L"<%wf16x>", c); #endif int_fast32_t d = 0x33333333'44444444; #if defined(__LP64__) EXPECT_SWPRINTF(L"<3333333344444444>", L"<%wf32x>", d); #else EXPECT_SWPRINTF(L"<44444444>", L"<%wf32x>", d); #endif int_fast64_t e = 0xaaaaaaaa'aaaaaaaa; EXPECT_SWPRINTF(L"<aaaaaaaaaaaaaaaa>", L"<%wf64x>", e); EXPECT_SWPRINTF(L"<AAAAAAAAAAAAAAAA>", L"<%wf64X>", e); #pragma clang diagnostic pop #else GTEST_SKIP() << "no %wf in glibc"; #endif } TEST(STDIO_TEST, snprintf_wf_arguments_reordering) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wconstant-conversion" #pragma clang diagnostic ignored "-Wformat" #pragma clang diagnostic ignored "-Wformat-extra-args" #pragma clang diagnostic ignored "-Wformat-invalid-specifier" int_fast16_t a = 0x11111111'22222222; int_fast32_t b = 0x33333333'44444444; int_fast32_t c = 0xaaaaaaaa'aaaaaaaa; #if defined(__LP64__) EXPECT_SNPRINTF( "<3333333344444444 --- 101010101010101010101010101010101010101010101010101010101010 "<%2$wf32x --- %1$wf32b>", c, b); EXPECT_SNPRINTF( "<1010101010101010101010101010101010101010101010101010101010101010 --- 111111112222 "3333333344444444>", "<%3$wf32b --- %1$wf16x --- %2$wf32x>", a, b, c); #else EXPECT_SNPRINTF("<44444444 --- 10101010101010101010101010101010>", "<%2$wf32x --- %1$wf3 b); EXPECT_SNPRINTF("<10101010101010101010101010101010 --- 22222222 --- 44444444>", "<%3$wf32b --- %1$wf16x --- %2$wf32x>", a, b, c); #endif #pragma clang diagnostic pop #else GTEST_SKIP() << "no %w in glibc"; #endif } TEST(STDIO_TEST, swprintf_wf_arguments_reordering) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wconstant-conversion" #pragma clang diagnostic ignored "-Wformat" #pragma clang diagnostic ignored "-Wformat-extra-args" #pragma clang diagnostic ignored "-Wformat-invalid-specifier" int_fast16_t a = 0x11111111'22222222; int_fast32_t b = 0x33333333'44444444; int_fast32_t c = 0xaaaaaaaa'aaaaaaaa; #if defined(__LP64__) EXPECT_SWPRINTF( L"<3333333344444444 --- 10101010101010101010101010101010101010101010101010101010101 L"<%2$wf32x --- %1$wf32b>", c, b); EXPECT_SWPRINTF( L"<1010101010101010101010101010101010101010101010101010101010101010 --- 11111111222 L"3333333344444444>", L"<%3$wf32b --- %1$wf16x --- %2$wf32x>", a, b, c); #else EXPECT_SWPRINTF(L"<44444444 --- 10101010101010101010101010101010>", L"<%2$wf32x --- %1$w b); EXPECT_SWPRINTF(L"<10101010101010101010101010101010 --- 22222222 --- 44444444>", L"<%3$wf32b --- %1$wf16x --- %2$wf32x>", a, b, c); #endif #pragma clang diagnostic pop #else GTEST_SKIP() << "no %w in glibc"; #endif } TEST_F(STDIO_DEATHTEST, snprintf_invalid_wf_width) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat" #pragma clang diagnostic ignored "-Wformat-invalid-specifier" char buf[BUFSIZ]; int_fast32_t a = 100; EXPECT_EXIT(snprintf(buf, sizeof(buf), "%wf20d", &a), testing::KilledBySignal(SIGABRT), "%wf20 is unsupported"); #pragma clang diagnostic pop #else GTEST_SKIP() << "no %w in glibc"; #endif } TEST_F(STDIO_DEATHTEST, swprintf_invalid_wf_width) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat" #pragma clang diagnostic ignored "-Wformat-invalid-specifier" wchar_t buf[BUFSIZ]; int_fast32_t a = 100; EXPECT_EXIT(swprintf(buf, sizeof(buf), L"%wf20d", &a), testing::KilledBySignal(SIGABRT), "%wf20 is unsupported"); #pragma clang diagnostic pop #else GTEST_SKIP() << "no %w in glibc"; #endif } TEST(STDIO_TEST, sscanf_w_or_wf_base) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat" #pragma clang diagnostic ignored "-Wformat-invalid-specifier" int8_t a; EXPECT_EQ(1, sscanf("<0b101>", "<%w8b>", &a)); EXPECT_EQ(0b101, a); int_fast8_t fast_a; EXPECT_EQ(1, sscanf("<0b101>", "<%wf8b>", &fast_a)); EXPECT_EQ(0b101, fast_a); int8_t b1; EXPECT_EQ(1, sscanf("<0xFF>", "<%w8i>", &b1)); EXPECT_EQ(-1, b1); int8_t b2; EXPECT_EQ(1, sscanf("<0x1FF>", "<%w8i>", &b2)); EXPECT_EQ(-1, b2); int_fast8_t fast_b; EXPECT_EQ(1, sscanf("<0x1234123412341234>", "<%wf8x>", &fast_b)); EXPECT_EQ(0x34, fast_b); int16_t c1; EXPECT_EQ(1, sscanf("<0xFFFF>", "<%w16i>", &c1)); EXPECT_EQ(-1, c1); uint16_t c2; EXPECT_EQ(1, sscanf("<64>", "<%w16d>", &c2)); EXPECT_EQ(64, c2); int_fast16_t fast_c; #if defined(__LP64__) EXPECT_EQ(1, sscanf("<0x1111111122222222>", "<%wf16x>", &fast_c)); EXPECT_EQ(0x1111111122222222, fast_c); #else EXPECT_EQ(1, sscanf("<0x1111111122222222>", "<%wf16x>", &fast_c)); EXPECT_EQ(0x22222222, fast_c); #endif int32_t d; EXPECT_EQ(1, sscanf("<021>", "<%w32o>", &d)); EXPECT_EQ(021, d); int_fast32_t fast_d; #if defined(__LP64__) EXPECT_EQ(1, sscanf("<0x3333333344444444>", "<%wf32x>", &fast_d)); EXPECT_EQ(0x3333333344444444, fast_d); #else EXPECT_EQ(1, sscanf("<0x3333333344444444>", "<%wf32x>", &fast_d)); EXPECT_EQ(0x44444444, fast_d); #endif uint32_t e; EXPECT_EQ(1, sscanf("<-1>", "<%w32u>", &e)); EXPECT_EQ(4294967295, e); int64_t f; EXPECT_EQ(1, sscanf("<0x3b>", "<%w64x>", &f)); EXPECT_EQ(0x3b, f); EXPECT_EQ(1, sscanf("<0x3b>", "<%w64X>", &f)); EXPECT_EQ(0x3B, f); uint_fast64_t fast_f; EXPECT_EQ(1, sscanf("<0xaaaaaaaa>", "<%wf64x>", &fast_f)); EXPECT_EQ(0xaaaaaaaa, fast_f); EXPECT_EQ(1, sscanf("<0xaaaaaaaa>", "<%wf64X>", &fast_f)); EXPECT_EQ(0xAAAAAAAA, fast_f); #pragma clang diagnostic pop #else GTEST_SKIP() << "no %w in glibc"; #endif } TEST(STDIO_TEST, sscanf_w_combination) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat" #pragma clang diagnostic ignored "-Wformat-invalid-specifier" #pragma clang diagnostic ignored "-Wformat-extra-args" uint32_t a; int64_t b; char c; EXPECT_EQ(3, sscanf("<0b10101010101010101010101010101010 0x3333333344444444 1>", "<%w32b %w64x %c>", &a, &b, &c)); EXPECT_EQ(0xaaaaaaaa, a); EXPECT_EQ(0x3333333344444444, b); EXPECT_EQ('1', c); #pragma clang diagnostic pop #else GTEST_SKIP() << "no %w in glibc"; #endif } TEST_F(STDIO_DEATHTEST, sscanf_invalid_w_or_wf_width) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat" #pragma clang diagnostic ignored "-Wformat-invalid-specifier" int32_t a; EXPECT_EXIT(sscanf("<100>", "<%w20d>", &a), testing::KilledBySignal(SIGABRT), "%w20 is unsupported"); int_fast32_t fast_a; EXPECT_EXIT(sscanf("<100>", "<%wf20d>", &fast_a), testing::KilledBySignal(SIGABRT), "%wf20 is unsupported"); #pragma clang diagnostic pop #else GTEST_SKIP() << "no %w in glibc"; #endif } TEST(STDIO_TEST, swscanf_w_or_wf_base) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat" #pragma clang diagnostic ignored "-Wformat-invalid-specifier" int8_t a; EXPECT_EQ(1, swscanf(L"<0b101>", L"<%w8b>", &a)); EXPECT_EQ(0b101, a); int_fast8_t fast_a; EXPECT_EQ(1, swscanf(L"<0b101>", L"<%wf8b>", &fast_a)); EXPECT_EQ(0b101, fast_a); int8_t b1; EXPECT_EQ(1, swscanf(L"<0xFF>", L"<%w8i>", &b1)); EXPECT_EQ(-1, b1); int8_t b2; EXPECT_EQ(1, swscanf(L"<0x1FF>", L"<%w8i>", &b2)); EXPECT_EQ(-1, b2); int_fast8_t fast_b; EXPECT_EQ(1, swscanf(L"<0x1234123412341234>", L"<%wf8i>", &fast_b)); EXPECT_EQ(0x34, fast_b); int16_t c1; EXPECT_EQ(1, swscanf(L"<0xFFFF>", L"<%w16i>", &c1)); EXPECT_EQ(-1, c1); uint16_t c2; EXPECT_EQ(1, swscanf(L"<64>", L"<%w16d>", &c2)); EXPECT_EQ(64, c2); int_fast16_t fast_c; #if defined(__LP64__) EXPECT_EQ(1, swscanf(L"<0x1111111122222222>", L"<%wf16x>", &fast_c)); EXPECT_EQ(0x1111111122222222, fast_c); #else EXPECT_EQ(1, swscanf(L"<0x1111111122222222>", L"<%wf16x>", &fast_c)); EXPECT_EQ(0x22222222, fast_c); #endif int32_t d; EXPECT_EQ(1, swscanf(L"<021>", L"<%w32o>", &d)); EXPECT_EQ(021, d); int_fast32_t fast_d; #if defined(__LP64__) EXPECT_EQ(1, swscanf(L"<0x3333333344444444>", L"<%wf32x>", &fast_d)); EXPECT_EQ(0x3333333344444444, fast_d); #else EXPECT_EQ(1, swscanf(L"<0x3333333344444444>", L"<%wf32x>", &fast_d)); EXPECT_EQ(0x44444444, fast_d); #endif uint32_t e; EXPECT_EQ(1, swscanf(L"<-1>", L"<%w32u>", &e)); EXPECT_EQ(4294967295, e); int64_t f; EXPECT_EQ(1, swscanf(L"<0x3b>", L"<%w64x>", &f)); EXPECT_EQ(0x3b, f); EXPECT_EQ(1, swscanf(L"<0x3b>", L"<%w64X>", &f)); EXPECT_EQ(0x3B, f); uint_fast64_t fast_f; EXPECT_EQ(1, swscanf(L"<0xaaaaaaaa>", L"<%wf64x>", &fast_f)); EXPECT_EQ(0xaaaaaaaa, fast_f); EXPECT_EQ(1, swscanf(L"<0xaaaaaaaa>", L"<%wf64X>", &fast_f)); EXPECT_EQ(0xAAAAAAAA, fast_f); #pragma clang diagnostic pop #else GTEST_SKIP() << "no %w in glibc"; #endif } TEST(STDIO_TEST, swscanf_w_combination) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat" #pragma clang diagnostic ignored "-Wformat-invalid-specifier" #pragma clang diagnostic ignored "-Wformat-extra-args" uint32_t a; int64_t b; char c; EXPECT_EQ(3, swscanf(L"<0b10101010101010101010101010101010 0x3333333344444444 1>", L"<%w32b %w64x %c>", &a, &b, &c)); EXPECT_EQ(0xaaaaaaaa, a); EXPECT_EQ(0x3333333344444444, b); EXPECT_EQ('1', c); #pragma clang diagnostic pop #else GTEST_SKIP() << "no %w in glibc"; #endif } TEST_F(STDIO_DEATHTEST, swscanf_invalid_w_or_wf_width) { #if defined(__BIONIC__) #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wformat" #pragma clang diagnostic ignored "-Wformat-invalid-specifier" int32_t a; EXPECT_EXIT(swscanf(L"<100>", L"<%w20d>", &a), testing::KilledBySignal(SIGABRT), "%w20 is unsupported"); int_fast32_t fast_a; EXPECT_EXIT(swscanf(L"<100>", L"<%wf20d>", &fast_a), testing::KilledBySignal(SIGABRT), "%wf20 is unsupported"); #pragma clang diagnostic pop #else GTEST_SKIP() << "no %w in glibc"; #endif } TEST(STDIO_TEST, printf_lc_0) { // https://austingroupbugs.net/view.php?id=1647 char buf[BUFSIZ]; EXPECT_EQ(3, snprintf(buf, sizeof(buf), "<%lc>", L'\0')); EXPECT_TRUE(!memcmp(buf, "<\0>", 3)); } // https://sourceware.org/bugzilla/show_bug.cgi?id=26557 // TL;DR: "does open_memstream() maintain the file length correctly?" static void glibc_bug_26557_helper(FILE* fp) { char data[32] = {}; EXPECT_EQ(24u, fwrite(data, 1, 24, fp)); EXPECT_EQ(24, ftell(fp)); EXPECT_EQ(0, fseek(fp, 0, SEEK_SET)); EXPECT_EQ(4u, fwrite(data, 1, 4, fp)); EXPECT_EQ(0, fseek(fp, 0, SEEK_END)); EXPECT_EQ(24, ftell(fp)); EXPECT_EQ(0, fclose(fp)); } TEST(STDIO_TEST, glibc_bug_26557_fopen) { glibc_bug_26557_helper(tmpfile()); } TEST(STDIO_TEST, glibc_bug_26557_fmemopen) { glibc_bug_26557_helper(fmemopen(nullptr, 32, "wb")); } TEST(STDIO_TEST, glibc_bug_26557_open_memstream) { char* p = new char[32]; size_t size = 32; glibc_bug_26557_helper(open_memstream(&p, &size)); } TEST(STDIO_TEST, fflush_POSIX_2008) { // C23 still has fflush() on a read-only stream as undefined behavior. // POSIX 2008 has "For a stream open for reading with an underlying file description, // if the file is not already at EOF, and the file is one capable of seeking, // the file offset of the underlying open file description shall be set to the file position of th // and any characters pushed back onto the stream by ungetc() or ungetwc() // that have not subsequently been read from the stream shall be discarded // (without further changing the file offset)". // It doesn't look like macOS or glibc actually implement the "discard the unget buffer" part, // but all the implementations seem to agree that fflush() should return success at least. FILE* fp = fopen("/proc/version", "r"); ASSERT_TRUE(fp != nullptr); ASSERT_EQ(0, fflush(fp)); fclose(fp); }
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2026-07-09