2 * Copyright (C) 2012 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include <gtest/gtest.h>
18 #include "BionicDeathTest.h"
19 #include "ScopedSignalHandler.h"
20 #include "TemporaryFile.h"
26 #include <sys/param.h>
27 #include <sys/syscall.h>
28 #include <sys/types.h>
29 #include <sys/utsname.h>
33 static void* get_brk() {
37 static void* page_align(uintptr_t addr) {
38 uintptr_t mask = sysconf(_SC_PAGE_SIZE) - 1;
39 return reinterpret_cast<void*>((addr + mask) & ~mask);
43 void* initial_break = get_brk();
45 // The kernel aligns the break to a page.
46 void* new_break = reinterpret_cast<void*>(reinterpret_cast<uintptr_t>(initial_break) + 1);
47 ASSERT_EQ(0, brk(new_break));
48 ASSERT_GE(get_brk(), new_break);
50 new_break = page_align(reinterpret_cast<uintptr_t>(initial_break) + sysconf(_SC_PAGE_SIZE));
51 ASSERT_EQ(0, brk(new_break));
52 ASSERT_EQ(get_brk(), new_break);
55 TEST(unistd, brk_ENOMEM) {
56 ASSERT_EQ(-1, brk(reinterpret_cast<void*>(-1)));
57 ASSERT_EQ(ENOMEM, errno);
60 #if defined(__GLIBC__)
61 #define SBRK_MIN INTPTR_MIN
62 #define SBRK_MAX INTPTR_MAX
64 #define SBRK_MIN PTRDIFF_MIN
65 #define SBRK_MAX PTRDIFF_MAX
68 TEST(unistd, sbrk_ENOMEM) {
69 #if defined(__BIONIC__) && !defined(__LP64__)
70 // There is no way to guarantee that all overflow conditions can be tested
71 // without manipulating the underlying values of the current break.
72 extern void* __bionic_brk;
76 ScopedBrk() : saved_brk_(__bionic_brk) {}
77 virtual ~ScopedBrk() { __bionic_brk = saved_brk_; }
85 // Set the current break to a point that will cause an overflow.
86 __bionic_brk = reinterpret_cast<void*>(static_cast<uintptr_t>(PTRDIFF_MAX) + 2);
88 // Can't increase by so much that we'd overflow.
89 ASSERT_EQ(reinterpret_cast<void*>(-1), sbrk(PTRDIFF_MAX));
90 ASSERT_EQ(ENOMEM, errno);
92 // Set the current break to a point that will cause an overflow.
93 __bionic_brk = reinterpret_cast<void*>(static_cast<uintptr_t>(PTRDIFF_MAX));
95 ASSERT_EQ(reinterpret_cast<void*>(-1), sbrk(PTRDIFF_MIN));
96 ASSERT_EQ(ENOMEM, errno);
98 __bionic_brk = reinterpret_cast<void*>(static_cast<uintptr_t>(PTRDIFF_MAX) - 1);
100 ASSERT_EQ(reinterpret_cast<void*>(-1), sbrk(PTRDIFF_MIN + 1));
101 ASSERT_EQ(ENOMEM, errno);
105 ScopedBrk() : saved_brk_(get_brk()) {}
106 virtual ~ScopedBrk() { brk(saved_brk_); }
114 uintptr_t cur_brk = reinterpret_cast<uintptr_t>(get_brk());
115 if (cur_brk < static_cast<uintptr_t>(-(SBRK_MIN+1))) {
116 // Do the overflow test for a max negative increment.
117 ASSERT_EQ(reinterpret_cast<void*>(-1), sbrk(SBRK_MIN));
118 #if defined(__BIONIC__)
119 // GLIBC does not set errno in overflow case.
120 ASSERT_EQ(ENOMEM, errno);
124 uintptr_t overflow_brk = static_cast<uintptr_t>(SBRK_MAX) + 2;
125 if (cur_brk < overflow_brk) {
126 // Try and move the value to PTRDIFF_MAX + 2.
127 cur_brk = reinterpret_cast<uintptr_t>(sbrk(overflow_brk));
129 if (cur_brk >= overflow_brk) {
130 ASSERT_EQ(reinterpret_cast<void*>(-1), sbrk(SBRK_MAX));
131 #if defined(__BIONIC__)
132 // GLIBC does not set errno in overflow case.
133 ASSERT_EQ(ENOMEM, errno);
139 TEST(unistd, truncate) {
141 ASSERT_EQ(0, close(tf.fd));
142 ASSERT_EQ(0, truncate(tf.filename, 123));
145 ASSERT_EQ(0, stat(tf.filename, &sb));
146 ASSERT_EQ(123, sb.st_size);
149 TEST(unistd, truncate64) {
151 ASSERT_EQ(0, close(tf.fd));
152 ASSERT_EQ(0, truncate64(tf.filename, 123));
155 ASSERT_EQ(0, stat(tf.filename, &sb));
156 ASSERT_EQ(123, sb.st_size);
159 TEST(unistd, ftruncate) {
161 ASSERT_EQ(0, ftruncate(tf.fd, 123));
162 ASSERT_EQ(0, close(tf.fd));
165 ASSERT_EQ(0, stat(tf.filename, &sb));
166 ASSERT_EQ(123, sb.st_size);
169 TEST(unistd, ftruncate64) {
171 ASSERT_EQ(0, ftruncate64(tf.fd, 123));
172 ASSERT_EQ(0, close(tf.fd));
175 ASSERT_EQ(0, stat(tf.filename, &sb));
176 ASSERT_EQ(123, sb.st_size);
179 TEST(unistd, ftruncate_negative) {
182 ASSERT_EQ(-1, ftruncate(tf.fd, -123));
183 ASSERT_EQ(EINVAL, errno);
186 static bool g_pause_test_flag = false;
187 static void PauseTestSignalHandler(int) {
188 g_pause_test_flag = true;
191 TEST(unistd, pause) {
192 ScopedSignalHandler handler(SIGALRM, PauseTestSignalHandler);
195 ASSERT_FALSE(g_pause_test_flag);
196 ASSERT_EQ(-1, pause());
197 ASSERT_TRUE(g_pause_test_flag);
201 int fd = open("/proc/version", O_RDONLY);
202 ASSERT_TRUE(fd != -1);
205 ASSERT_EQ(5, read(fd, buf, 5));
206 ASSERT_EQ(buf[0], 'L');
207 ASSERT_EQ(buf[1], 'i');
208 ASSERT_EQ(buf[2], 'n');
209 ASSERT_EQ(buf[3], 'u');
210 ASSERT_EQ(buf[4], 'x');
214 TEST(unistd, read_EBADF) {
215 // read returns ssize_t which is 64-bits on LP64, so it's worth explicitly checking that
216 // our syscall stubs correctly return a 64-bit -1.
218 ASSERT_EQ(-1, read(-1, buf, sizeof(buf)));
219 ASSERT_EQ(EBADF, errno);
222 TEST(unistd, syscall_long) {
223 // Check that syscall(3) correctly returns long results.
224 // https://code.google.com/p/android/issues/detail?id=73952
225 // We assume that the break is > 4GiB, but this is potentially flaky.
226 uintptr_t p = reinterpret_cast<uintptr_t>(sbrk(0));
227 ASSERT_EQ(p, static_cast<uintptr_t>(syscall(__NR_brk, 0)));
230 TEST(unistd, alarm) {
231 ASSERT_EQ(0U, alarm(0));
234 TEST(unistd, _exit) {
236 ASSERT_NE(-1, pid) << strerror(errno);
243 ASSERT_EQ(pid, waitpid(pid, &status, 0));
244 ASSERT_TRUE(WIFEXITED(status));
245 ASSERT_EQ(99, WEXITSTATUS(status));
248 TEST(unistd, getenv_unsetenv) {
249 ASSERT_EQ(0, setenv("test-variable", "hello", 1));
250 ASSERT_STREQ("hello", getenv("test-variable"));
251 ASSERT_EQ(0, unsetenv("test-variable"));
252 ASSERT_TRUE(getenv("test-variable") == NULL);
255 TEST(unistd, unsetenv_EINVAL) {
256 EXPECT_EQ(-1, unsetenv(""));
257 EXPECT_EQ(EINVAL, errno);
258 EXPECT_EQ(-1, unsetenv("a=b"));
259 EXPECT_EQ(EINVAL, errno);
262 TEST(unistd, setenv_EINVAL) {
263 EXPECT_EQ(-1, setenv(NULL, "value", 0));
264 EXPECT_EQ(EINVAL, errno);
265 EXPECT_EQ(-1, setenv(NULL, "value", 1));
266 EXPECT_EQ(EINVAL, errno);
267 EXPECT_EQ(-1, setenv("", "value", 0));
268 EXPECT_EQ(EINVAL, errno);
269 EXPECT_EQ(-1, setenv("", "value", 1));
270 EXPECT_EQ(EINVAL, errno);
271 EXPECT_EQ(-1, setenv("a=b", "value", 0));
272 EXPECT_EQ(EINVAL, errno);
273 EXPECT_EQ(-1, setenv("a=b", "value", 1));
274 EXPECT_EQ(EINVAL, errno);
277 TEST(unistd, setenv) {
278 ASSERT_EQ(0, unsetenv("test-variable"));
285 EXPECT_EQ(0, setenv("test-variable", a, 0));
286 EXPECT_STREQ(a, getenv("test-variable"));
288 // Existing value, no overwrite.
289 EXPECT_EQ(0, setenv("test-variable", b, 0));
290 EXPECT_STREQ(a, getenv("test-variable"));
292 // Existing value, overwrite.
293 EXPECT_EQ(0, setenv("test-variable", c, 1));
294 EXPECT_STREQ(c, getenv("test-variable"));
295 // But the arrays backing the values are unchanged.
296 EXPECT_EQ('a', a[0]);
297 EXPECT_EQ('b', b[0]);
298 EXPECT_EQ('c', c[0]);
300 ASSERT_EQ(0, unsetenv("test-variable"));
303 TEST(unistd, putenv) {
304 ASSERT_EQ(0, unsetenv("a"));
306 char* s1 = strdup("a=b");
307 ASSERT_EQ(0, putenv(s1));
309 ASSERT_STREQ("b", getenv("a"));
311 ASSERT_STREQ("c", getenv("a"));
313 char* s2 = strdup("a=b");
314 ASSERT_EQ(0, putenv(s2));
316 ASSERT_STREQ("b", getenv("a"));
317 ASSERT_EQ('c', s1[2]);
319 ASSERT_EQ(0, unsetenv("a"));
324 TEST(unistd, clearenv) {
325 extern char** environ;
327 // Guarantee that environ is not initially empty...
328 ASSERT_EQ(0, setenv("test-variable", "a", 1));
331 std::vector<char*> old_environ;
332 for (size_t i = 0; environ[i] != NULL; ++i) {
333 old_environ.push_back(strdup(environ[i]));
336 ASSERT_EQ(0, clearenv());
338 EXPECT_TRUE(environ == NULL || environ[0] == NULL);
339 EXPECT_EQ(NULL, getenv("test-variable"));
340 EXPECT_EQ(0, setenv("test-variable", "post-clear", 1));
341 EXPECT_STREQ("post-clear", getenv("test-variable"));
343 // Put the old environment back.
344 for (size_t i = 0; i < old_environ.size(); ++i) {
345 EXPECT_EQ(0, putenv(old_environ[i]));
348 // Check it wasn't overwritten.
349 EXPECT_STREQ("a", getenv("test-variable"));
351 EXPECT_EQ(0, unsetenv("test-variable"));
354 static void TestFsyncFunction(int (*fn)(int)) {
357 // Can't sync an invalid fd.
359 EXPECT_EQ(-1, fn(-1));
360 EXPECT_EQ(EBADF, errno);
362 // It doesn't matter whether you've opened a file for write or not.
364 ASSERT_NE(-1, tf.fd);
366 EXPECT_EQ(0, fn(tf.fd));
368 ASSERT_NE(-1, fd = open(tf.filename, O_RDONLY));
369 EXPECT_EQ(0, fn(fd));
372 ASSERT_NE(-1, fd = open(tf.filename, O_RDWR));
373 EXPECT_EQ(0, fn(fd));
376 // The fd can even be a directory.
377 ASSERT_NE(-1, fd = open("/", O_RDONLY));
378 EXPECT_EQ(0, fn(fd));
381 // But some file systems may choose to be fussy...
383 ASSERT_NE(-1, fd = open("/proc/version", O_RDONLY));
384 EXPECT_EQ(-1, fn(fd));
385 EXPECT_EQ(EINVAL, errno);
389 TEST(unistd, fdatasync) {
390 TestFsyncFunction(fdatasync);
393 TEST(unistd, fsync) {
394 TestFsyncFunction(fsync);
397 static void AssertGetPidCorrect() {
398 // The loop is just to make manual testing/debugging with strace easier.
399 pid_t getpid_syscall_result = syscall(__NR_getpid);
400 for (size_t i = 0; i < 128; ++i) {
401 ASSERT_EQ(getpid_syscall_result, getpid());
405 static void TestGetPidCachingWithFork(int (*fork_fn)()) {
406 pid_t parent_pid = getpid();
407 ASSERT_EQ(syscall(__NR_getpid), parent_pid);
409 pid_t fork_result = fork_fn();
410 ASSERT_NE(fork_result, -1);
411 if (fork_result == 0) {
413 AssertGetPidCorrect();
414 ASSERT_EQ(parent_pid, getppid());
418 ASSERT_EQ(parent_pid, getpid());
421 ASSERT_EQ(fork_result, waitpid(fork_result, &status, 0));
422 ASSERT_TRUE(WIFEXITED(status));
423 ASSERT_EQ(123, WEXITSTATUS(status));
427 TEST(unistd, getpid_caching_and_fork) {
428 TestGetPidCachingWithFork(fork);
431 TEST(unistd, getpid_caching_and_vfork) {
432 TestGetPidCachingWithFork(vfork);
435 static int GetPidCachingCloneStartRoutine(void*) {
436 AssertGetPidCorrect();
440 TEST(unistd, getpid_caching_and_clone) {
441 pid_t parent_pid = getpid();
442 ASSERT_EQ(syscall(__NR_getpid), parent_pid);
444 void* child_stack[1024];
445 int clone_result = clone(GetPidCachingCloneStartRoutine, &child_stack[1024], CLONE_NEWNS | SIGCHLD, NULL);
446 if (clone_result == -1 && errno == EPERM && getuid() != 0) {
447 GTEST_LOG_(INFO) << "This test only works if you have permission to CLONE_NEWNS; try running as root.\n";
450 ASSERT_NE(clone_result, -1);
452 ASSERT_EQ(parent_pid, getpid());
455 ASSERT_EQ(clone_result, waitpid(clone_result, &status, 0));
456 ASSERT_TRUE(WIFEXITED(status));
457 ASSERT_EQ(123, WEXITSTATUS(status));
460 static void* GetPidCachingPthreadStartRoutine(void*) {
461 AssertGetPidCorrect();
465 TEST(unistd, getpid_caching_and_pthread_create) {
466 pid_t parent_pid = getpid();
469 ASSERT_EQ(0, pthread_create(&t, NULL, GetPidCachingPthreadStartRoutine, NULL));
471 ASSERT_EQ(parent_pid, getpid());
474 ASSERT_EQ(0, pthread_join(t, &result));
475 ASSERT_EQ(NULL, result);
478 class unistd_DeathTest : public BionicDeathTest {};
480 TEST_F(unistd_DeathTest, abort) {
481 ASSERT_EXIT(abort(), testing::KilledBySignal(SIGABRT), "");
484 TEST(unistd, sethostname) {
485 // The permissions check happens before the argument check, so this will
486 // fail for a different reason if you're running as root than if you're
487 // not, but it'll fail either way. Checking that we have the symbol is about
488 // all we can do for sethostname(2).
489 ASSERT_EQ(-1, sethostname("", -1));
492 TEST(unistd, gethostname) {
493 char hostname[HOST_NAME_MAX + 1];
494 memset(hostname, 0, sizeof(hostname));
496 // Can we get the hostname with a big buffer?
497 ASSERT_EQ(0, gethostname(hostname, HOST_NAME_MAX));
499 // Can we get the hostname with a right-sized buffer?
501 ASSERT_EQ(0, gethostname(hostname, strlen(hostname) + 1));
503 // Does uname(2) agree?
505 ASSERT_EQ(0, uname(&buf));
506 ASSERT_EQ(0, strncmp(hostname, buf.nodename, SYS_NMLN));
507 ASSERT_GT(strlen(hostname), 0U);
509 // Do we correctly detect truncation?
511 ASSERT_EQ(-1, gethostname(hostname, strlen(hostname)));
512 ASSERT_EQ(ENAMETOOLONG, errno);
515 TEST(unistd, pathconf_fpathconf) {
518 // As a file system's block size is always power of 2, the configure values
519 // for ALLOC and XFER should be power of 2 as well.
520 rc = pathconf(tf.filename, _PC_ALLOC_SIZE_MIN);
521 ASSERT_TRUE(rc > 0 && powerof2(rc));
522 rc = pathconf(tf.filename, _PC_REC_MIN_XFER_SIZE);
523 ASSERT_TRUE(rc > 0 && powerof2(rc));
524 rc = pathconf(tf.filename, _PC_REC_XFER_ALIGN);
525 ASSERT_TRUE(rc > 0 && powerof2(rc));
527 rc = fpathconf(tf.fd, _PC_ALLOC_SIZE_MIN);
528 ASSERT_TRUE(rc > 0 && powerof2(rc));
529 rc = fpathconf(tf.fd, _PC_REC_MIN_XFER_SIZE);
530 ASSERT_TRUE(rc > 0 && powerof2(rc));
531 rc = fpathconf(tf.fd, _PC_REC_XFER_ALIGN);
532 ASSERT_TRUE(rc > 0 && powerof2(rc));
536 TEST(unistd, _POSIX_macros_smoke) {
537 // Make a tight verification of _POSIX_* / _POSIX2_* / _XOPEN_* macros, to prevent change by mistake.
538 // Verify according to POSIX.1-2008.
539 EXPECT_EQ(200809L, _POSIX_VERSION);
541 EXPECT_EQ(_POSIX_VERSION, _POSIX_ADVISORY_INFO);
542 EXPECT_GT(_POSIX_AIO_LISTIO_MAX, 0);
543 EXPECT_GT(_POSIX_AIO_MAX, 0);
544 EXPECT_GT(_POSIX_ARG_MAX, 0);
545 EXPECT_GT(_POSIX_CHILD_MAX, 0);
546 EXPECT_NE(_POSIX_CHOWN_RESTRICTED, -1);
547 EXPECT_EQ(_POSIX_VERSION, _POSIX_CLOCK_SELECTION);
548 EXPECT_EQ(0, _POSIX_CPUTIME); // Use sysconf to detect support at runtime.
549 EXPECT_GT(_POSIX_DELAYTIMER_MAX, 0);
550 EXPECT_EQ(_POSIX_VERSION, _POSIX_FSYNC);
551 EXPECT_GT(_POSIX_HOST_NAME_MAX, 0);
552 EXPECT_EQ(_POSIX_VERSION, _POSIX_IPV6);
553 EXPECT_GT(_POSIX_JOB_CONTROL, 0);
554 EXPECT_GT(_POSIX_LINK_MAX, 0);
555 EXPECT_GT(_POSIX_LOGIN_NAME_MAX, 0);
556 EXPECT_EQ(_POSIX_VERSION, _POSIX_MAPPED_FILES);
557 EXPECT_GT(_POSIX_MAX_CANON, 0);
558 EXPECT_GT(_POSIX_MAX_INPUT, 0);
559 EXPECT_EQ(_POSIX_VERSION, _POSIX_MEMLOCK);
560 EXPECT_EQ(_POSIX_VERSION, _POSIX_MEMLOCK_RANGE);
561 EXPECT_EQ(_POSIX_VERSION, _POSIX_MEMORY_PROTECTION);
562 EXPECT_EQ(0, _POSIX_MONOTONIC_CLOCK);
563 EXPECT_GT(_POSIX_MQ_OPEN_MAX, 0);
564 EXPECT_GT(_POSIX_MQ_PRIO_MAX, 0);
565 EXPECT_GT(_POSIX_NAME_MAX, 0);
566 EXPECT_GT(_POSIX_NGROUPS_MAX, 0);
567 EXPECT_GT(_POSIX_NO_TRUNC, 0);
568 EXPECT_GT(_POSIX_OPEN_MAX, 0);
569 EXPECT_GT(_POSIX_PATH_MAX, 0);
570 EXPECT_GT(_POSIX_PIPE_BUF, 0);
571 EXPECT_EQ(_POSIX_VERSION, _POSIX_PRIORITY_SCHEDULING);
572 EXPECT_EQ(_POSIX_VERSION, _POSIX_RAW_SOCKETS);
573 EXPECT_EQ(_POSIX_VERSION, _POSIX_READER_WRITER_LOCKS);
574 EXPECT_EQ(_POSIX_VERSION, _POSIX_REALTIME_SIGNALS);
575 EXPECT_GT(_POSIX_REGEXP, 0);
576 EXPECT_GT(_POSIX_RE_DUP_MAX, 0);
577 EXPECT_GT(_POSIX_SAVED_IDS, 0);
578 EXPECT_EQ(_POSIX_VERSION, _POSIX_SEMAPHORES);
579 EXPECT_GT(_POSIX_SEM_NSEMS_MAX, 0);
580 EXPECT_GT(_POSIX_SEM_VALUE_MAX, 0);
581 EXPECT_GT(_POSIX_SHELL, 0);
582 EXPECT_GT(_POSIX_SIGQUEUE_MAX, 0);
583 EXPECT_EQ(-1, _POSIX_SPORADIC_SERVER);
584 EXPECT_GT(_POSIX_SSIZE_MAX, 0);
585 EXPECT_GT(_POSIX_STREAM_MAX, 0);
586 EXPECT_GT(_POSIX_SYMLINK_MAX, 0);
587 EXPECT_GT(_POSIX_SYMLOOP_MAX, 0);
588 EXPECT_EQ(_POSIX_VERSION, _POSIX_SYNCHRONIZED_IO);
589 EXPECT_EQ(_POSIX_VERSION, _POSIX_THREADS);
590 EXPECT_EQ(_POSIX_VERSION, _POSIX_THREAD_ATTR_STACKADDR);
591 EXPECT_EQ(_POSIX_VERSION, _POSIX_THREAD_ATTR_STACKSIZE);
592 EXPECT_EQ(0, _POSIX_THREAD_CPUTIME); // Use sysconf to detect support at runtime.
593 EXPECT_GT(_POSIX_THREAD_DESTRUCTOR_ITERATIONS, 0);
594 EXPECT_EQ(_POSIX_THREAD_KEYS_MAX, 128);
595 EXPECT_EQ(_POSIX_VERSION, _POSIX_THREAD_PRIORITY_SCHEDULING);
596 EXPECT_EQ(_POSIX_VERSION, _POSIX_THREAD_PRIO_INHERIT);
597 EXPECT_EQ(_POSIX_VERSION, _POSIX_THREAD_PRIO_PROTECT);
598 EXPECT_EQ(-1, _POSIX_THREAD_ROBUST_PRIO_PROTECT);
599 EXPECT_EQ(_POSIX_VERSION, _POSIX_THREAD_SAFE_FUNCTIONS);
600 EXPECT_EQ(-1, _POSIX_THREAD_SPORADIC_SERVER);
601 EXPECT_GT(_POSIX_THREAD_THREADS_MAX, 0);
602 EXPECT_EQ(_POSIX_VERSION, _POSIX_TIMEOUTS);
603 EXPECT_EQ(_POSIX_VERSION, _POSIX_TIMERS);
604 EXPECT_GT(_POSIX_TIMER_MAX, 0);
605 EXPECT_EQ(-1, _POSIX_TRACE);
606 EXPECT_EQ(-1, _POSIX_TRACE_EVENT_FILTER);
607 EXPECT_EQ(-1, _POSIX_TRACE_INHERIT);
608 EXPECT_EQ(-1, _POSIX_TRACE_LOG);
609 EXPECT_GT(_POSIX_TTY_NAME_MAX, 0);
610 EXPECT_EQ(-1, _POSIX_TYPED_MEMORY_OBJECTS);
611 EXPECT_GT(_POSIX_TZNAME_MAX, 0);
612 EXPECT_NE(-1, _POSIX_VDISABLE);
614 EXPECT_GT(_POSIX2_BC_BASE_MAX, 0);
615 EXPECT_GT(_POSIX2_BC_DIM_MAX, 0);
616 EXPECT_GT(_POSIX2_BC_SCALE_MAX, 0);
617 EXPECT_GT(_POSIX2_BC_STRING_MAX, 0);
618 EXPECT_GT(_POSIX2_CHARCLASS_NAME_MAX, 0);
619 EXPECT_GT(_POSIX2_COLL_WEIGHTS_MAX, 0);
620 EXPECT_EQ(_POSIX_VERSION, _POSIX2_C_BIND);
621 EXPECT_GT(_POSIX2_EXPR_NEST_MAX, 0);
622 EXPECT_GT(_POSIX2_LINE_MAX, 0);
623 EXPECT_GT(_POSIX2_RE_DUP_MAX, 0);
625 EXPECT_EQ(700, _XOPEN_VERSION);
626 EXPECT_GT(_XOPEN_IOV_MAX, 0);
627 EXPECT_GT(_XOPEN_UNIX, 0);
629 #if defined(__BIONIC__)
630 // These tests only pass on bionic, as bionic and glibc has different support on these macros.
631 // Macros like _POSIX_ASYNCHRONOUS_IO are not supported on bionic yet.
632 EXPECT_EQ(-1, _POSIX_ASYNCHRONOUS_IO);
633 EXPECT_EQ(-1, _POSIX_BARRIERS);
634 EXPECT_EQ(-1, _POSIX_MESSAGE_PASSING);
635 EXPECT_EQ(-1, _POSIX_PRIORITIZED_IO);
636 EXPECT_EQ(-1, _POSIX_SHARED_MEMORY_OBJECTS);
637 EXPECT_EQ(-1, _POSIX_SPAWN);
638 EXPECT_EQ(-1, _POSIX_SPIN_LOCKS);
639 EXPECT_EQ(-1, _POSIX_THREAD_PROCESS_SHARED);
640 EXPECT_EQ(-1, _POSIX_THREAD_ROBUST_PRIO_INHERIT);
642 EXPECT_EQ(-1, _POSIX2_VERSION);
643 EXPECT_EQ(-1, _POSIX2_CHAR_TERM);
644 EXPECT_EQ(-1, _POSIX2_C_DEV);
645 EXPECT_EQ(-1, _POSIX2_LOCALEDEF);
646 EXPECT_EQ(-1, _POSIX2_SW_DEV);
647 EXPECT_EQ(-1, _POSIX2_UPE);
649 EXPECT_EQ(-1, _XOPEN_ENH_I18N);
650 EXPECT_EQ(-1, _XOPEN_CRYPT);
651 EXPECT_EQ(-1, _XOPEN_LEGACY);
652 EXPECT_EQ(-1, _XOPEN_REALTIME);
653 EXPECT_EQ(-1, _XOPEN_REALTIME_THREADS);
654 EXPECT_EQ(-1, _XOPEN_SHM);
656 #endif // defined(__BIONIC__)
659 #define VERIFY_SYSCONF_NOT_SUPPORT(name) VerifySysconf(name, #name, [](long v){return v == -1;})
661 // sysconf() means unlimited when it returns -1 with errno unchanged.
662 #define VERIFY_SYSCONF_POSITIVE(name) \
663 VerifySysconf(name, #name, [](long v){return (v > 0 || v == -1);})
665 #define VERIFY_SYSCONF_POSIX_VERSION(name) \
666 VerifySysconf(name, #name, [](long v){return v == _POSIX_VERSION;})
668 static void VerifySysconf(int option, const char *option_name, bool (*verify)(long)) {
670 long ret = sysconf(option);
671 EXPECT_TRUE(0 == errno && verify(ret)) << "name = " << option_name << ", ret = "
672 << ret <<", Error Message: " << strerror(errno);
675 TEST(unistd, sysconf) {
676 VERIFY_SYSCONF_POSIX_VERSION(_SC_ADVISORY_INFO);
677 VERIFY_SYSCONF_POSITIVE(_SC_ARG_MAX);
678 VERIFY_SYSCONF_POSITIVE(_SC_BC_BASE_MAX);
679 VERIFY_SYSCONF_POSITIVE(_SC_BC_DIM_MAX);
680 VERIFY_SYSCONF_POSITIVE(_SC_BC_SCALE_MAX);
681 VERIFY_SYSCONF_POSITIVE(_SC_CHILD_MAX);
682 VERIFY_SYSCONF_POSITIVE(_SC_CLK_TCK);
683 VERIFY_SYSCONF_POSITIVE(_SC_COLL_WEIGHTS_MAX);
684 VERIFY_SYSCONF_POSIX_VERSION(_SC_CPUTIME);
685 VERIFY_SYSCONF_POSITIVE(_SC_EXPR_NEST_MAX);
686 VERIFY_SYSCONF_POSITIVE(_SC_LINE_MAX);
687 VERIFY_SYSCONF_POSITIVE(_SC_NGROUPS_MAX);
688 VERIFY_SYSCONF_POSITIVE(_SC_OPEN_MAX);
689 VERIFY_SYSCONF_POSITIVE(_SC_PASS_MAX);
690 VERIFY_SYSCONF_POSIX_VERSION(_SC_2_C_BIND);
691 VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_FORT_DEV);
692 VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_FORT_RUN);
693 VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_UPE);
694 VERIFY_SYSCONF_POSITIVE(_SC_JOB_CONTROL);
695 VERIFY_SYSCONF_POSITIVE(_SC_SAVED_IDS);
696 VERIFY_SYSCONF_POSIX_VERSION(_SC_VERSION);
697 VERIFY_SYSCONF_POSITIVE(_SC_RE_DUP_MAX);
698 VERIFY_SYSCONF_POSITIVE(_SC_STREAM_MAX);
699 VERIFY_SYSCONF_POSITIVE(_SC_TZNAME_MAX);
700 VerifySysconf(_SC_XOPEN_VERSION, "_SC_XOPEN_VERSION", [](long v){return v == _XOPEN_VERSION;});
701 VERIFY_SYSCONF_POSITIVE(_SC_ATEXIT_MAX);
702 VERIFY_SYSCONF_POSITIVE(_SC_IOV_MAX);
703 VERIFY_SYSCONF_POSITIVE(_SC_PAGESIZE);
704 VERIFY_SYSCONF_POSITIVE(_SC_PAGE_SIZE);
705 VerifySysconf(_SC_PAGE_SIZE, "_SC_PAGE_SIZE",
706 [](long v){return v == sysconf(_SC_PAGESIZE) && v == getpagesize();});
707 VERIFY_SYSCONF_POSITIVE(_SC_XOPEN_UNIX);
708 VERIFY_SYSCONF_POSITIVE(_SC_AIO_LISTIO_MAX);
709 VERIFY_SYSCONF_POSITIVE(_SC_AIO_MAX);
710 VerifySysconf(_SC_AIO_PRIO_DELTA_MAX, "_SC_AIO_PRIO_DELTA_MAX", [](long v){return v >= 0;});
711 VERIFY_SYSCONF_POSITIVE(_SC_DELAYTIMER_MAX);
712 VERIFY_SYSCONF_POSITIVE(_SC_MQ_OPEN_MAX);
713 VERIFY_SYSCONF_POSITIVE(_SC_MQ_PRIO_MAX);
714 VERIFY_SYSCONF_POSITIVE(_SC_RTSIG_MAX);
715 VERIFY_SYSCONF_POSITIVE(_SC_SEM_NSEMS_MAX);
716 VERIFY_SYSCONF_POSITIVE(_SC_SEM_VALUE_MAX);
717 VERIFY_SYSCONF_POSITIVE(_SC_TIMER_MAX);
718 VERIFY_SYSCONF_POSIX_VERSION(_SC_FSYNC);
719 VERIFY_SYSCONF_POSIX_VERSION(_SC_MAPPED_FILES);
720 VERIFY_SYSCONF_POSIX_VERSION(_SC_MEMLOCK);
721 VERIFY_SYSCONF_POSIX_VERSION(_SC_MEMLOCK_RANGE);
722 VERIFY_SYSCONF_POSIX_VERSION(_SC_MEMORY_PROTECTION);
723 VERIFY_SYSCONF_POSIX_VERSION(_SC_PRIORITY_SCHEDULING);
724 VERIFY_SYSCONF_POSIX_VERSION(_SC_REALTIME_SIGNALS);
725 VERIFY_SYSCONF_POSIX_VERSION(_SC_SEMAPHORES);
726 VERIFY_SYSCONF_POSIX_VERSION(_SC_SYNCHRONIZED_IO);
727 VERIFY_SYSCONF_POSIX_VERSION(_SC_TIMERS);
728 VERIFY_SYSCONF_POSITIVE(_SC_GETGR_R_SIZE_MAX);
729 VERIFY_SYSCONF_POSITIVE(_SC_GETPW_R_SIZE_MAX);
730 VERIFY_SYSCONF_POSITIVE(_SC_LOGIN_NAME_MAX);
731 VERIFY_SYSCONF_POSITIVE(_SC_THREAD_DESTRUCTOR_ITERATIONS);
732 VERIFY_SYSCONF_POSITIVE(_SC_THREAD_KEYS_MAX);
733 VERIFY_SYSCONF_POSITIVE(_SC_THREAD_STACK_MIN);
734 VERIFY_SYSCONF_POSITIVE(_SC_THREAD_THREADS_MAX);
735 VERIFY_SYSCONF_POSITIVE(_SC_TTY_NAME_MAX);
736 VERIFY_SYSCONF_POSIX_VERSION(_SC_THREADS);
737 VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_ATTR_STACKADDR);
738 VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_ATTR_STACKSIZE);
739 VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_PRIORITY_SCHEDULING);
740 VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_PRIO_INHERIT);
741 VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_PRIO_PROTECT);
742 VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_SAFE_FUNCTIONS);
743 VERIFY_SYSCONF_POSITIVE(_SC_NPROCESSORS_CONF);
744 VERIFY_SYSCONF_POSITIVE(_SC_NPROCESSORS_ONLN);
745 VERIFY_SYSCONF_POSITIVE(_SC_PHYS_PAGES);
746 VERIFY_SYSCONF_POSITIVE(_SC_AVPHYS_PAGES);
747 VERIFY_SYSCONF_POSIX_VERSION(_SC_MONOTONIC_CLOCK);
748 VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_PBS);
749 VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_PBS_ACCOUNTING);
750 VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_PBS_CHECKPOINT);
751 VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_PBS_LOCATE);
752 VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_PBS_MESSAGE);
753 VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_PBS_TRACK);
754 VERIFY_SYSCONF_POSIX_VERSION(_SC_CLOCK_SELECTION);
755 VERIFY_SYSCONF_POSITIVE(_SC_HOST_NAME_MAX);
756 VERIFY_SYSCONF_POSIX_VERSION(_SC_IPV6);
757 VERIFY_SYSCONF_POSIX_VERSION(_SC_RAW_SOCKETS);
758 VERIFY_SYSCONF_POSIX_VERSION(_SC_READER_WRITER_LOCKS);
759 VERIFY_SYSCONF_POSITIVE(_SC_REGEXP);
760 VERIFY_SYSCONF_POSITIVE(_SC_SHELL);
761 VERIFY_SYSCONF_NOT_SUPPORT(_SC_SPORADIC_SERVER);
762 VERIFY_SYSCONF_POSITIVE(_SC_SYMLOOP_MAX);
763 VERIFY_SYSCONF_POSIX_VERSION(_SC_THREAD_CPUTIME);
764 VERIFY_SYSCONF_NOT_SUPPORT(_SC_THREAD_SPORADIC_SERVER);
765 VERIFY_SYSCONF_POSIX_VERSION(_SC_TIMEOUTS);
766 VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE);
767 VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_EVENT_FILTER);
768 VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_EVENT_NAME_MAX);
769 VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_INHERIT);
770 VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_LOG);
771 VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_NAME_MAX);
772 VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_SYS_MAX);
773 VERIFY_SYSCONF_NOT_SUPPORT(_SC_TRACE_USER_EVENT_MAX);
774 VERIFY_SYSCONF_NOT_SUPPORT(_SC_TYPED_MEMORY_OBJECTS);
775 VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_STREAMS);
777 #if defined(__LP64__)
778 VERIFY_SYSCONF_NOT_SUPPORT(_SC_V7_ILP32_OFF32);
779 VERIFY_SYSCONF_NOT_SUPPORT(_SC_V7_ILP32_OFFBIG);
780 VERIFY_SYSCONF_POSITIVE(_SC_V7_LP64_OFF64);
781 VERIFY_SYSCONF_POSITIVE(_SC_V7_LPBIG_OFFBIG);
783 VERIFY_SYSCONF_POSITIVE(_SC_V7_ILP32_OFF32);
784 #if defined(__BIONIC__)
785 // bionic does not support 64 bits off_t type on 32bit machine.
786 VERIFY_SYSCONF_NOT_SUPPORT(_SC_V7_ILP32_OFFBIG);
788 VERIFY_SYSCONF_NOT_SUPPORT(_SC_V7_LP64_OFF64);
789 VERIFY_SYSCONF_NOT_SUPPORT(_SC_V7_LPBIG_OFFBIG);
792 #if defined(__BIONIC__)
793 // Tests can only run on bionic, as bionic and glibc have different support for these options.
794 // Below options are not supported on bionic yet.
795 VERIFY_SYSCONF_NOT_SUPPORT(_SC_ASYNCHRONOUS_IO);
796 VERIFY_SYSCONF_NOT_SUPPORT(_SC_BARRIERS);
797 VERIFY_SYSCONF_NOT_SUPPORT(_SC_MESSAGE_PASSING);
798 VERIFY_SYSCONF_NOT_SUPPORT(_SC_PRIORITIZED_IO);
799 VERIFY_SYSCONF_NOT_SUPPORT(_SC_SHARED_MEMORY_OBJECTS);
800 VERIFY_SYSCONF_NOT_SUPPORT(_SC_SPAWN);
801 VERIFY_SYSCONF_NOT_SUPPORT(_SC_SPIN_LOCKS);
802 VERIFY_SYSCONF_NOT_SUPPORT(_SC_THREAD_PROCESS_SHARED);
803 VERIFY_SYSCONF_NOT_SUPPORT(_SC_THREAD_ROBUST_PRIO_INHERIT);
804 VERIFY_SYSCONF_NOT_SUPPORT(_SC_THREAD_ROBUST_PRIO_PROTECT);
806 VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_C_DEV);
807 VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_CHAR_TERM);
808 VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_LOCALEDEF);
809 VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_SW_DEV);
810 VERIFY_SYSCONF_NOT_SUPPORT(_SC_2_VERSION);
812 VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_CRYPT);
813 VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_ENH_I18N);
814 VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_LEGACY);
815 VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_REALTIME);
816 VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_REALTIME_THREADS);
817 VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_SHM);
818 VERIFY_SYSCONF_NOT_SUPPORT(_SC_XOPEN_UUCP);
819 #endif // defined(__BIONIC__)
822 TEST(unistd, dup2_same) {
823 // POSIX says of dup2:
824 // If fildes2 is already a valid open file descriptor ...
825 // [and] fildes is equal to fildes2 ... dup2() shall return
826 // fildes2 without closing it.
827 // This isn't true of dup3(2), so we need to manually implement that.
830 int fd = open("/proc/version", O_RDONLY);
831 ASSERT_TRUE(fd != -1);
832 ASSERT_EQ(fd, dup2(fd, fd));
833 ASSERT_EQ(0, close(fd)); // Check that dup2 didn't close fd.
835 // Equal, but invalid.
837 ASSERT_EQ(-1, dup2(fd, fd));
838 ASSERT_EQ(EBADF, errno);