1/*
2 * Copyright (C) 2013 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 <sys/wait.h>
19#include <errno.h>
20#include <unistd.h>
21#include <string>
22
23#if defined(__BIONIC__)
24
25#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
26#include <sys/_system_properties.h>
27
28extern void *__system_property_area__;
29
30struct LocalPropertyTestState {
31    LocalPropertyTestState() : valid(false) {
32        const char* ANDROID_DATA = getenv("ANDROID_DATA");
33        char dir_template[PATH_MAX];
34        snprintf(dir_template, sizeof(dir_template), "%s/local/tmp/prop-XXXXXX", ANDROID_DATA);
35        char* dirname = mkdtemp(dir_template);
36        if (!dirname) {
37            fprintf(stderr, "making temp file for test state failed (is %s writable?): %s",
38                    dir_template, strerror(errno));
39            return;
40        }
41
42        old_pa = __system_property_area__;
43        __system_property_area__ = NULL;
44
45        pa_dirname = dirname;
46        pa_filename = pa_dirname + "/__properties__";
47
48        __system_property_set_filename(pa_filename.c_str());
49        __system_property_area_init();
50        valid = true;
51    }
52
53    ~LocalPropertyTestState() {
54        if (!valid) {
55            return;
56        }
57
58        __system_property_area__ = old_pa;
59
60        __system_property_set_filename(PROP_FILENAME);
61        unlink(pa_filename.c_str());
62        rmdir(pa_dirname.c_str());
63    }
64public:
65    bool valid;
66private:
67    std::string pa_dirname;
68    std::string pa_filename;
69    void *old_pa;
70};
71
72static void foreach_test_callback(const prop_info *pi, void* cookie) {
73    size_t *count = static_cast<size_t *>(cookie);
74
75    ASSERT_NE((prop_info *)NULL, pi);
76    (*count)++;
77}
78
79static void hierarchical_test_callback(const prop_info *pi, void *cookie) {
80    bool (*ok)[8][8] = static_cast<bool (*)[8][8]>(cookie);
81
82    char name[PROP_NAME_MAX];
83    char value[PROP_VALUE_MAX];
84
85    __system_property_read(pi, name, value);
86
87    int name_i, name_j, name_k;
88    int value_i, value_j, value_k;
89    ASSERT_EQ(3, sscanf(name, "property_%d.%d.%d", &name_i, &name_j, &name_k));
90    ASSERT_EQ(3, sscanf(value, "value_%d.%d.%d", &value_i, &value_j, &value_k));
91    ASSERT_EQ(name_i, value_i);
92    ASSERT_GE(name_i, 0);
93    ASSERT_LT(name_i, 8);
94    ASSERT_EQ(name_j, value_j);
95    ASSERT_GE(name_j, 0);
96    ASSERT_LT(name_j, 8);
97    ASSERT_EQ(name_k, value_k);
98    ASSERT_GE(name_k, 0);
99    ASSERT_LT(name_k, 8);
100
101    ok[name_i][name_j][name_k] = true;
102}
103
104static void *PropertyWaitHelperFn(void *arg) {
105    int *flag = (int *)arg;
106    prop_info *pi;
107    pi = (prop_info *)__system_property_find("property");
108    usleep(100000);
109
110    *flag = 1;
111    __system_property_update(pi, "value3", 6);
112
113    return NULL;
114}
115
116#endif // __BIONIC__
117
118TEST(properties, add) {
119#if defined(__BIONIC__)
120    LocalPropertyTestState pa;
121    ASSERT_TRUE(pa.valid);
122
123    char propvalue[PROP_VALUE_MAX];
124
125    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
126    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
127    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
128
129    ASSERT_EQ(6, __system_property_get("property", propvalue));
130    ASSERT_STREQ(propvalue, "value1");
131
132    ASSERT_EQ(6, __system_property_get("other_property", propvalue));
133    ASSERT_STREQ(propvalue, "value2");
134
135    ASSERT_EQ(6, __system_property_get("property_other", propvalue));
136    ASSERT_STREQ(propvalue, "value3");
137#else // __BIONIC__
138    GTEST_LOG_(INFO) << "This test does nothing.\n";
139#endif // __BIONIC__
140}
141
142TEST(properties, update) {
143#if defined(__BIONIC__)
144    LocalPropertyTestState pa;
145    ASSERT_TRUE(pa.valid);
146
147    char propvalue[PROP_VALUE_MAX];
148    prop_info *pi;
149
150    ASSERT_EQ(0, __system_property_add("property", 8, "oldvalue1", 9));
151    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
152    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
153
154    pi = (prop_info *)__system_property_find("property");
155    ASSERT_NE((prop_info *)NULL, pi);
156    __system_property_update(pi, "value4", 6);
157
158    pi = (prop_info *)__system_property_find("other_property");
159    ASSERT_NE((prop_info *)NULL, pi);
160    __system_property_update(pi, "newvalue5", 9);
161
162    pi = (prop_info *)__system_property_find("property_other");
163    ASSERT_NE((prop_info *)NULL, pi);
164    __system_property_update(pi, "value6", 6);
165
166    ASSERT_EQ(6, __system_property_get("property", propvalue));
167    ASSERT_STREQ(propvalue, "value4");
168
169    ASSERT_EQ(9, __system_property_get("other_property", propvalue));
170    ASSERT_STREQ(propvalue, "newvalue5");
171
172    ASSERT_EQ(6, __system_property_get("property_other", propvalue));
173    ASSERT_STREQ(propvalue, "value6");
174#else // __BIONIC__
175    GTEST_LOG_(INFO) << "This test does nothing.\n";
176#endif // __BIONIC__
177}
178
179TEST(properties, fill) {
180#if defined(__BIONIC__)
181    LocalPropertyTestState pa;
182    ASSERT_TRUE(pa.valid);
183    char prop_name[PROP_NAME_MAX];
184    char prop_value[PROP_VALUE_MAX];
185    char prop_value_ret[PROP_VALUE_MAX];
186    int count = 0;
187    int ret;
188
189    while (true) {
190        ret = snprintf(prop_name, PROP_NAME_MAX - 1, "property_%d", count);
191        memset(prop_name + ret, 'a', PROP_NAME_MAX - 1 - ret);
192        ret = snprintf(prop_value, PROP_VALUE_MAX - 1, "value_%d", count);
193        memset(prop_value + ret, 'b', PROP_VALUE_MAX - 1 - ret);
194        prop_name[PROP_NAME_MAX - 1] = 0;
195        prop_value[PROP_VALUE_MAX - 1] = 0;
196
197        ret = __system_property_add(prop_name, PROP_NAME_MAX - 1, prop_value, PROP_VALUE_MAX - 1);
198        if (ret < 0)
199            break;
200
201        count++;
202    }
203
204    // For historical reasons at least 247 properties must be supported
205    ASSERT_GE(count, 247);
206
207    for (int i = 0; i < count; i++) {
208        ret = snprintf(prop_name, PROP_NAME_MAX - 1, "property_%d", i);
209        memset(prop_name + ret, 'a', PROP_NAME_MAX - 1 - ret);
210        ret = snprintf(prop_value, PROP_VALUE_MAX - 1, "value_%d", i);
211        memset(prop_value + ret, 'b', PROP_VALUE_MAX - 1 - ret);
212        prop_name[PROP_NAME_MAX - 1] = 0;
213        prop_value[PROP_VALUE_MAX - 1] = 0;
214        memset(prop_value_ret, '\0', PROP_VALUE_MAX);
215
216        ASSERT_EQ(PROP_VALUE_MAX - 1, __system_property_get(prop_name, prop_value_ret));
217        ASSERT_EQ(0, memcmp(prop_value, prop_value_ret, PROP_VALUE_MAX));
218    }
219#else // __BIONIC__
220    GTEST_LOG_(INFO) << "This test does nothing.\n";
221#endif // __BIONIC__
222}
223
224TEST(properties, foreach) {
225#if defined(__BIONIC__)
226    LocalPropertyTestState pa;
227    ASSERT_TRUE(pa.valid);
228    size_t count = 0;
229
230    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
231    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
232    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
233
234    ASSERT_EQ(0, __system_property_foreach(foreach_test_callback, &count));
235    ASSERT_EQ(3U, count);
236#else // __BIONIC__
237    GTEST_LOG_(INFO) << "This test does nothing.\n";
238#endif // __BIONIC__
239}
240
241TEST(properties, find_nth) {
242#if defined(__BIONIC__)
243    LocalPropertyTestState pa;
244    ASSERT_TRUE(pa.valid);
245
246    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
247    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
248    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
249
250    ASSERT_NE((const prop_info *)NULL, __system_property_find_nth(0));
251    ASSERT_NE((const prop_info *)NULL, __system_property_find_nth(1));
252    ASSERT_NE((const prop_info *)NULL, __system_property_find_nth(2));
253
254    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(3));
255    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(4));
256    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(5));
257    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(100));
258    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(200));
259    ASSERT_EQ((const prop_info *)NULL, __system_property_find_nth(247));
260#else // __BIONIC__
261    GTEST_LOG_(INFO) << "This test does nothing.\n";
262#endif // __BIONIC__
263}
264
265TEST(properties, fill_hierarchical) {
266#if defined(__BIONIC__)
267    LocalPropertyTestState pa;
268    ASSERT_TRUE(pa.valid);
269    char prop_name[PROP_NAME_MAX];
270    char prop_value[PROP_VALUE_MAX];
271    char prop_value_ret[PROP_VALUE_MAX];
272    int ret;
273
274    for (int i = 0; i < 8; i++) {
275        for (int j = 0; j < 8; j++) {
276            for (int k = 0; k < 8; k++) {
277                ret = snprintf(prop_name, PROP_NAME_MAX - 1, "property_%d.%d.%d", i, j, k);
278                memset(prop_name + ret, 'a', PROP_NAME_MAX - 1 - ret);
279                ret = snprintf(prop_value, PROP_VALUE_MAX - 1, "value_%d.%d.%d", i, j, k);
280                memset(prop_value + ret, 'b', PROP_VALUE_MAX - 1 - ret);
281                prop_name[PROP_NAME_MAX - 1] = 0;
282                prop_value[PROP_VALUE_MAX - 1] = 0;
283
284                ASSERT_EQ(0, __system_property_add(prop_name, PROP_NAME_MAX - 1, prop_value, PROP_VALUE_MAX - 1));
285            }
286        }
287    }
288
289    for (int i = 0; i < 8; i++) {
290        for (int j = 0; j < 8; j++) {
291            for (int k = 0; k < 8; k++) {
292                ret = snprintf(prop_name, PROP_NAME_MAX - 1, "property_%d.%d.%d", i, j, k);
293                memset(prop_name + ret, 'a', PROP_NAME_MAX - 1 - ret);
294                ret = snprintf(prop_value, PROP_VALUE_MAX - 1, "value_%d.%d.%d", i, j, k);
295                memset(prop_value + ret, 'b', PROP_VALUE_MAX - 1 - ret);
296                prop_name[PROP_NAME_MAX - 1] = 0;
297                prop_value[PROP_VALUE_MAX - 1] = 0;
298                memset(prop_value_ret, '\0', PROP_VALUE_MAX);
299
300                ASSERT_EQ(PROP_VALUE_MAX - 1, __system_property_get(prop_name, prop_value_ret));
301                ASSERT_EQ(0, memcmp(prop_value, prop_value_ret, PROP_VALUE_MAX));
302            }
303        }
304    }
305
306    bool ok[8][8][8];
307    memset(ok, 0, sizeof(ok));
308    __system_property_foreach(hierarchical_test_callback, ok);
309
310    for (int i = 0; i < 8; i++) {
311        for (int j = 0; j < 8; j++) {
312            for (int k = 0; k < 8; k++) {
313                ASSERT_TRUE(ok[i][j][k]);
314            }
315        }
316    }
317#else // __BIONIC__
318    GTEST_LOG_(INFO) << "This test does nothing.\n";
319#endif // __BIONIC__
320}
321
322TEST(properties, errors) {
323#if defined(__BIONIC__)
324    LocalPropertyTestState pa;
325    ASSERT_TRUE(pa.valid);
326    char prop_value[PROP_NAME_MAX];
327
328    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
329    ASSERT_EQ(0, __system_property_add("other_property", 14, "value2", 6));
330    ASSERT_EQ(0, __system_property_add("property_other", 14, "value3", 6));
331
332    ASSERT_EQ(0, __system_property_find("property1"));
333    ASSERT_EQ(0, __system_property_get("property1", prop_value));
334
335    ASSERT_EQ(-1, __system_property_add("name", PROP_NAME_MAX, "value", 5));
336    ASSERT_EQ(-1, __system_property_add("name", 4, "value", PROP_VALUE_MAX));
337    ASSERT_EQ(-1, __system_property_update(NULL, "value", PROP_VALUE_MAX));
338#else // __BIONIC__
339    GTEST_LOG_(INFO) << "This test does nothing.\n";
340#endif // __BIONIC__
341}
342
343TEST(properties, serial) {
344#if defined(__BIONIC__)
345    LocalPropertyTestState pa;
346    ASSERT_TRUE(pa.valid);
347    const prop_info *pi;
348    unsigned int serial;
349
350    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
351    ASSERT_NE((const prop_info *)NULL, pi = __system_property_find("property"));
352    serial = __system_property_serial(pi);
353    ASSERT_EQ(0, __system_property_update((prop_info *)pi, "value2", 6));
354    ASSERT_NE(serial, __system_property_serial(pi));
355#else // __BIONIC__
356    GTEST_LOG_(INFO) << "This test does nothing.\n";
357#endif // __BIONIC__
358}
359
360TEST(properties, wait) {
361#if defined(__BIONIC__)
362    LocalPropertyTestState pa;
363    ASSERT_TRUE(pa.valid);
364    unsigned int serial;
365    prop_info *pi;
366    pthread_t t;
367    int flag = 0;
368
369    ASSERT_EQ(0, __system_property_add("property", 8, "value1", 6));
370    serial = __system_property_wait_any(0);
371    pi = (prop_info *)__system_property_find("property");
372    ASSERT_NE((prop_info *)NULL, pi);
373    __system_property_update(pi, "value2", 6);
374    serial = __system_property_wait_any(serial);
375
376    ASSERT_EQ(0, pthread_create(&t, NULL, PropertyWaitHelperFn, &flag));
377    ASSERT_EQ(flag, 0);
378    serial = __system_property_wait_any(serial);
379    ASSERT_EQ(flag, 1);
380
381    void* result;
382    ASSERT_EQ(0, pthread_join(t, &result));
383#else // __BIONIC__
384    GTEST_LOG_(INFO) << "This test does nothing.\n";
385#endif // __BIONIC__
386}
387
388class KilledByFault {
389    public:
390        explicit KilledByFault() {};
391        bool operator()(int exit_status) const;
392};
393
394bool KilledByFault::operator()(int exit_status) const {
395    return WIFSIGNALED(exit_status) &&
396        (WTERMSIG(exit_status) == SIGSEGV ||
397         WTERMSIG(exit_status) == SIGBUS ||
398         WTERMSIG(exit_status) == SIGABRT);
399}
400
401TEST(properties_DeathTest, read_only) {
402#if defined(__BIONIC__)
403  ::testing::FLAGS_gtest_death_test_style = "threadsafe";
404
405  // This test only makes sense if we're talking to the real system property service.
406  struct stat sb;
407  if (stat(PROP_FILENAME, &sb) == -1 && errno == ENOENT) {
408    return;
409  }
410
411  ASSERT_EXIT(__system_property_add("property", 8, "value", 5), KilledByFault(), "");
412#else // __BIONIC__
413  GTEST_LOG_(INFO) << "This test does nothing.\n";
414#endif // __BIONIC__
415}
416