1 /*
2  * Copyright (C) 2012 The Android Open Source Project
3  *
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
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
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.
15  */
16 
17 #include <gtest/gtest.h>
18 #include "TemporaryFile.h"
19 
20 #include <errno.h>
21 #include <libgen.h>
22 #include <limits.h>
23 #include <pthread.h>
24 #include <stdint.h>
25 #include <stdlib.h>
26 #include <fcntl.h>
27 #include <sys/types.h>
28 #include <sys/wait.h>
29 
TEST(stdlib,drand48)30 TEST(stdlib, drand48) {
31   srand48(0x01020304);
32   EXPECT_DOUBLE_EQ(0.65619299195623526, drand48());
33   EXPECT_DOUBLE_EQ(0.18522597229772941, drand48());
34   EXPECT_DOUBLE_EQ(0.42015087072844537, drand48());
35   EXPECT_DOUBLE_EQ(0.061637783047395089, drand48());
36 }
37 
TEST(stdlib,lrand48)38 TEST(stdlib, lrand48) {
39   srand48(0x01020304);
40   EXPECT_EQ(1409163720, lrand48());
41   EXPECT_EQ(397769746, lrand48());
42   EXPECT_EQ(902267124, lrand48());
43   EXPECT_EQ(132366131, lrand48());
44 }
45 
TEST(stdlib,random)46 TEST(stdlib, random) {
47   srandom(0x01020304);
48   EXPECT_EQ(55436735, random());
49   EXPECT_EQ(1399865117, random());
50   EXPECT_EQ(2032643283, random());
51   EXPECT_EQ(571329216, random());
52 }
53 
TEST(stdlib,rand)54 TEST(stdlib, rand) {
55   srand(0x01020304);
56   EXPECT_EQ(55436735, rand());
57   EXPECT_EQ(1399865117, rand());
58   EXPECT_EQ(2032643283, rand());
59   EXPECT_EQ(571329216, rand());
60 }
61 
TEST(stdlib,mrand48)62 TEST(stdlib, mrand48) {
63   srand48(0x01020304);
64   EXPECT_EQ(-1476639856, mrand48());
65   EXPECT_EQ(795539493, mrand48());
66   EXPECT_EQ(1804534249, mrand48());
67   EXPECT_EQ(264732262, mrand48());
68 }
69 
TEST(stdlib,posix_memalign)70 TEST(stdlib, posix_memalign) {
71   void* p;
72 
73   ASSERT_EQ(0, posix_memalign(&p, 512, 128));
74   ASSERT_EQ(0U, reinterpret_cast<uintptr_t>(p) % 512);
75   free(p);
76 
77   // Can't align to a non-power of 2.
78   ASSERT_EQ(EINVAL, posix_memalign(&p, 81, 128));
79 }
80 
TEST(stdlib,realpath__NULL_filename)81 TEST(stdlib, realpath__NULL_filename) {
82   errno = 0;
83   char* p = realpath(NULL, NULL);
84   ASSERT_TRUE(p == NULL);
85   ASSERT_EQ(EINVAL, errno);
86 }
87 
TEST(stdlib,realpath__empty_filename)88 TEST(stdlib, realpath__empty_filename) {
89   errno = 0;
90   char* p = realpath("", NULL);
91   ASSERT_TRUE(p == NULL);
92   ASSERT_EQ(ENOENT, errno);
93 }
94 
TEST(stdlib,realpath__ENOENT)95 TEST(stdlib, realpath__ENOENT) {
96   errno = 0;
97   char* p = realpath("/this/directory/path/almost/certainly/does/not/exist", NULL);
98   ASSERT_TRUE(p == NULL);
99   ASSERT_EQ(ENOENT, errno);
100 }
101 
TEST(stdlib,realpath)102 TEST(stdlib, realpath) {
103   // Get the name of this executable.
104   char executable_path[PATH_MAX];
105   int rc = readlink("/proc/self/exe", executable_path, sizeof(executable_path));
106   ASSERT_NE(rc, -1);
107   executable_path[rc] = '\0';
108 
109   char buf[PATH_MAX + 1];
110   char* p = realpath("/proc/self/exe", buf);
111   ASSERT_STREQ(executable_path, p);
112 
113   p = realpath("/proc/self/exe", NULL);
114   ASSERT_STREQ(executable_path, p);
115   free(p);
116 }
117 
TEST(stdlib,qsort)118 TEST(stdlib, qsort) {
119   struct s {
120     char name[16];
121     static int comparator(const void* lhs, const void* rhs) {
122       return strcmp(reinterpret_cast<const s*>(lhs)->name, reinterpret_cast<const s*>(rhs)->name);
123     }
124   };
125   s entries[3];
126   strcpy(entries[0].name, "charlie");
127   strcpy(entries[1].name, "bravo");
128   strcpy(entries[2].name, "alpha");
129 
130   qsort(entries, 3, sizeof(s), s::comparator);
131   ASSERT_STREQ("alpha", entries[0].name);
132   ASSERT_STREQ("bravo", entries[1].name);
133   ASSERT_STREQ("charlie", entries[2].name);
134 
135   qsort(entries, 3, sizeof(s), s::comparator);
136   ASSERT_STREQ("alpha", entries[0].name);
137   ASSERT_STREQ("bravo", entries[1].name);
138   ASSERT_STREQ("charlie", entries[2].name);
139 }
140 
TestBug57421_child(void * arg)141 static void* TestBug57421_child(void* arg) {
142   pthread_t main_thread = reinterpret_cast<pthread_t>(arg);
143   pthread_join(main_thread, NULL);
144   char* value = getenv("ENVIRONMENT_VARIABLE");
145   if (value == NULL) {
146     setenv("ENVIRONMENT_VARIABLE", "value", 1);
147   }
148   return NULL;
149 }
150 
TestBug57421_main()151 static void TestBug57421_main() {
152   pthread_t t;
153   ASSERT_EQ(0, pthread_create(&t, NULL, TestBug57421_child, reinterpret_cast<void*>(pthread_self())));
154   pthread_exit(NULL);
155 }
156 
157 // Even though this isn't really a death test, we have to say "DeathTest" here so gtest knows to
158 // run this test (which exits normally) in its own process.
TEST(stdlib_DeathTest,getenv_after_main_thread_exits)159 TEST(stdlib_DeathTest, getenv_after_main_thread_exits) {
160   // https://code.google.com/p/android/issues/detail?id=57421
161   ::testing::FLAGS_gtest_death_test_style = "threadsafe";
162   ASSERT_EXIT(TestBug57421_main(), ::testing::ExitedWithCode(0), "");
163 }
164 
TEST(stdlib,mkstemp)165 TEST(stdlib, mkstemp) {
166   TemporaryFile tf;
167   struct stat sb;
168   ASSERT_EQ(0, fstat(tf.fd, &sb));
169 }
170 
TEST(stdlib,mkstemp64)171 TEST(stdlib, mkstemp64) {
172   GenericTemporaryFile<mkstemp64> tf;
173   struct stat64 sb;
174   ASSERT_EQ(0, fstat64(tf.fd, &sb));
175   ASSERT_EQ(O_LARGEFILE, fcntl(tf.fd, F_GETFL) & O_LARGEFILE);
176 }
177 
TEST(stdlib,system)178 TEST(stdlib, system) {
179   int status;
180 
181   status = system("exit 0");
182   ASSERT_TRUE(WIFEXITED(status));
183   ASSERT_EQ(0, WEXITSTATUS(status));
184 
185   status = system("exit 1");
186   ASSERT_TRUE(WIFEXITED(status));
187   ASSERT_EQ(1, WEXITSTATUS(status));
188 }
189 
TEST(stdlib,atof)190 TEST(stdlib, atof) {
191   ASSERT_DOUBLE_EQ(1.23, atof("1.23"));
192 }
193 
TEST(stdlib,strtod)194 TEST(stdlib, strtod) {
195   ASSERT_DOUBLE_EQ(1.23, strtod("1.23", NULL));
196 }
197 
TEST(stdlib,strtof)198 TEST(stdlib, strtof) {
199   ASSERT_FLOAT_EQ(1.23, strtof("1.23", NULL));
200 }
201 
TEST(stdlib,strtold)202 TEST(stdlib, strtold) {
203   ASSERT_DOUBLE_EQ(1.23, strtold("1.23", NULL));
204 }
205 
TEST(stdlib,quick_exit)206 TEST(stdlib, quick_exit) {
207   pid_t pid = fork();
208   ASSERT_NE(-1, pid) << strerror(errno);
209 
210   if (pid == 0) {
211     quick_exit(99);
212   }
213 
214   int status;
215   ASSERT_EQ(pid, waitpid(pid, &status, 0));
216   ASSERT_TRUE(WIFEXITED(status));
217   ASSERT_EQ(99, WEXITSTATUS(status));
218 }
219 
220 static int quick_exit_status = 0;
221 
quick_exit_1(void)222 static void quick_exit_1(void) {
223   ASSERT_EQ(quick_exit_status, 0);
224   quick_exit_status = 1;
225 }
226 
quick_exit_2(void)227 static void quick_exit_2(void) {
228   ASSERT_EQ(quick_exit_status, 1);
229 }
230 
not_run(void)231 static void not_run(void) {
232   FAIL();
233 }
234 
TEST(stdlib,at_quick_exit)235 TEST(stdlib, at_quick_exit) {
236   pid_t pid = fork();
237   ASSERT_NE(-1, pid) << strerror(errno);
238 
239   if (pid == 0) {
240     ASSERT_EQ(at_quick_exit(quick_exit_2), 0);
241     ASSERT_EQ(at_quick_exit(quick_exit_1), 0);
242     atexit(not_run);
243     quick_exit(99);
244   }
245 
246   int status;
247   ASSERT_EQ(pid, waitpid(pid, &status, 0));
248   ASSERT_TRUE(WIFEXITED(status));
249   ASSERT_EQ(99, WEXITSTATUS(status));
250 }
251 
TEST(unistd,_Exit)252 TEST(unistd, _Exit) {
253   int pid = fork();
254   ASSERT_NE(-1, pid) << strerror(errno);
255 
256   if (pid == 0) {
257     _Exit(99);
258   }
259 
260   int status;
261   ASSERT_EQ(pid, waitpid(pid, &status, 0));
262   ASSERT_TRUE(WIFEXITED(status));
263   ASSERT_EQ(99, WEXITSTATUS(status));
264 }
265 
TEST(stdlib,pty_smoke)266 TEST(stdlib, pty_smoke) {
267   // getpt returns a pty with O_RDWR|O_NOCTTY.
268   int fd = getpt();
269   ASSERT_NE(-1, fd);
270 
271   // grantpt is a no-op.
272   ASSERT_EQ(0, grantpt(fd));
273 
274   // ptsname_r should start "/dev/pts/".
275   char name_r[128];
276   ASSERT_EQ(0, ptsname_r(fd, name_r, sizeof(name_r)));
277   name_r[9] = 0;
278   ASSERT_STREQ("/dev/pts/", name_r);
279 
280   close(fd);
281 }
282 
TEST(stdlib,posix_openpt)283 TEST(stdlib, posix_openpt) {
284   int fd = posix_openpt(O_RDWR|O_NOCTTY|O_CLOEXEC);
285   ASSERT_NE(-1, fd);
286   close(fd);
287 }
288 
TEST(stdlib,ptsname_r_ENOTTY)289 TEST(stdlib, ptsname_r_ENOTTY) {
290   errno = 0;
291   char buf[128];
292   ASSERT_EQ(ENOTTY, ptsname_r(STDOUT_FILENO, buf, sizeof(buf)));
293   ASSERT_EQ(ENOTTY, errno);
294 }
295 
TEST(stdlib,ptsname_r_EINVAL)296 TEST(stdlib, ptsname_r_EINVAL) {
297   int fd = getpt();
298   ASSERT_NE(-1, fd);
299   errno = 0;
300   char* buf = NULL;
301   ASSERT_EQ(EINVAL, ptsname_r(fd, buf, 128));
302   ASSERT_EQ(EINVAL, errno);
303   close(fd);
304 }
305 
TEST(stdlib,ptsname_r_ERANGE)306 TEST(stdlib, ptsname_r_ERANGE) {
307   int fd = getpt();
308   ASSERT_NE(-1, fd);
309   errno = 0;
310   char buf[1];
311   ASSERT_EQ(ERANGE, ptsname_r(fd, buf, sizeof(buf)));
312   ASSERT_EQ(ERANGE, errno);
313   close(fd);
314 }
315 
TEST(stdlib,ttyname_r)316 TEST(stdlib, ttyname_r) {
317   int fd = getpt();
318   ASSERT_NE(-1, fd);
319 
320   // ttyname_r returns "/dev/ptmx" for a pty.
321   char name_r[128];
322   ASSERT_EQ(0, ttyname_r(fd, name_r, sizeof(name_r)));
323   ASSERT_STREQ("/dev/ptmx", name_r);
324 
325   close(fd);
326 }
327 
TEST(stdlib,ttyname_r_ENOTTY)328 TEST(stdlib, ttyname_r_ENOTTY) {
329   int fd = open("/dev/null", O_WRONLY);
330   errno = 0;
331   char buf[128];
332   ASSERT_EQ(ENOTTY, ttyname_r(fd, buf, sizeof(buf)));
333   ASSERT_EQ(ENOTTY, errno);
334   close(fd);
335 }
336 
TEST(stdlib,ttyname_r_EINVAL)337 TEST(stdlib, ttyname_r_EINVAL) {
338   int fd = getpt();
339   ASSERT_NE(-1, fd);
340   errno = 0;
341   char* buf = NULL;
342   ASSERT_EQ(EINVAL, ttyname_r(fd, buf, 128));
343   ASSERT_EQ(EINVAL, errno);
344   close(fd);
345 }
346 
TEST(stdlib,ttyname_r_ERANGE)347 TEST(stdlib, ttyname_r_ERANGE) {
348   int fd = getpt();
349   ASSERT_NE(-1, fd);
350   errno = 0;
351   char buf[1];
352   ASSERT_EQ(ERANGE, ttyname_r(fd, buf, sizeof(buf)));
353   ASSERT_EQ(ERANGE, errno);
354   close(fd);
355 }
356 
TEST(stdlib,unlockpt_ENOTTY)357 TEST(stdlib, unlockpt_ENOTTY) {
358   int fd = open("/dev/null", O_WRONLY);
359   errno = 0;
360   ASSERT_EQ(-1, unlockpt(fd));
361   ASSERT_EQ(ENOTTY, errno);
362   close(fd);
363 }
364