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 */
17 #include <gtest/gtest.h>
19 #include <errno.h>
20 #include <fcntl.h>
21 #include <limits.h>
22 #include <math.h>
23 #include <stdio.h>
24 #include <sys/types.h>
25 #include <sys/stat.h>
26 #include <unistd.h>
27 #include <wchar.h>
28 #include <locale.h>
30 #include "TemporaryFile.h"
32 TEST(stdio, flockfile_18208568_stderr) {
33 // Check that we have a _recursive_ mutex for flockfile.
34 flockfile(stderr);
35 feof(stderr); // We don't care about the result, but this needs to take the lock.
36 funlockfile(stderr);
37 }
39 TEST(stdio, flockfile_18208568_regular) {
40 // We never had a bug for streams other than stdin/stdout/stderr, but test anyway.
41 FILE* fp = fopen("/dev/null", "w");
42 ASSERT_TRUE(fp != NULL);
43 flockfile(fp);
44 feof(fp);
45 funlockfile(fp);
46 fclose(fp);
47 }
49 TEST(stdio, tmpfile_fileno_fprintf_rewind_fgets) {
50 FILE* fp = tmpfile();
51 ASSERT_TRUE(fp != NULL);
53 int fd = fileno(fp);
54 ASSERT_NE(fd, -1);
56 struct stat sb;
57 int rc = fstat(fd, &sb);
58 ASSERT_NE(rc, -1);
59 ASSERT_EQ(sb.st_mode & 0777, 0600U);
61 rc = fprintf(fp, "hello\n");
62 ASSERT_EQ(rc, 6);
64 rewind(fp);
66 char buf[16];
67 char* s = fgets(buf, sizeof(buf), fp);
68 ASSERT_TRUE(s != NULL);
69 ASSERT_STREQ("hello\n", s);
71 fclose(fp);
72 }
74 TEST(stdio, dprintf) {
75 TemporaryFile tf;
77 int rc = dprintf(tf.fd, "hello\n");
78 ASSERT_EQ(rc, 6);
80 lseek(tf.fd, 0, SEEK_SET);
81 FILE* tfile = fdopen(tf.fd, "r");
82 ASSERT_TRUE(tfile != NULL);
84 char buf[7];
85 ASSERT_EQ(buf, fgets(buf, sizeof(buf), tfile));
86 ASSERT_STREQ("hello\n", buf);
87 // Make sure there isn't anything else in the file.
88 ASSERT_EQ(NULL, fgets(buf, sizeof(buf), tfile));
89 fclose(tfile);
90 }
92 TEST(stdio, getdelim) {
93 FILE* fp = tmpfile();
94 ASSERT_TRUE(fp != NULL);
96 const char* line_written = "This is a test";
97 int rc = fprintf(fp, "%s", line_written);
98 ASSERT_EQ(rc, static_cast<int>(strlen(line_written)));
100 rewind(fp);
102 char* word_read = NULL;
103 size_t allocated_length = 0;
105 const char* expected[] = { "This ", " ", "is ", "a ", "test" };
106 for (size_t i = 0; i < 5; ++i) {
107 ASSERT_FALSE(feof(fp));
108 ASSERT_EQ(getdelim(&word_read, &allocated_length, ' ', fp), static_cast<int>(strlen(expected[i])));
109 ASSERT_GE(allocated_length, strlen(expected[i]));
110 ASSERT_STREQ(word_read, expected[i]);
111 }
112 // The last read should have set the end-of-file indicator for the stream.
113 ASSERT_TRUE(feof(fp));
114 clearerr(fp);
116 // getdelim returns -1 but doesn't set errno if we're already at EOF.
117 // It should set the end-of-file indicator for the stream, though.
118 errno = 0;
119 ASSERT_EQ(getdelim(&word_read, &allocated_length, ' ', fp), -1);
120 ASSERT_EQ(0, errno);
121 ASSERT_TRUE(feof(fp));
123 free(word_read);
124 fclose(fp);
125 }
127 TEST(stdio, getdelim_invalid) {
128 FILE* fp = tmpfile();
129 ASSERT_TRUE(fp != NULL);
131 char* buffer = NULL;
132 size_t buffer_length = 0;
134 // The first argument can't be NULL.
135 errno = 0;
136 ASSERT_EQ(getdelim(NULL, &buffer_length, ' ', fp), -1);
137 ASSERT_EQ(EINVAL, errno);
139 // The second argument can't be NULL.
140 errno = 0;
141 ASSERT_EQ(getdelim(&buffer, NULL, ' ', fp), -1);
142 ASSERT_EQ(EINVAL, errno);
144 // The underlying fd can't be closed.
145 ASSERT_EQ(0, close(fileno(fp)));
146 errno = 0;
147 ASSERT_EQ(getdelim(&buffer, &buffer_length, ' ', fp), -1);
148 ASSERT_EQ(EBADF, errno);
149 fclose(fp);
150 }
152 TEST(stdio, getline) {
153 FILE* fp = tmpfile();
154 ASSERT_TRUE(fp != NULL);
156 const char* line_written = "This is a test for getline\n";
157 const size_t line_count = 5;
159 for (size_t i = 0; i < line_count; ++i) {
160 int rc = fprintf(fp, "%s", line_written);
161 ASSERT_EQ(rc, static_cast<int>(strlen(line_written)));
162 }
164 rewind(fp);
166 char* line_read = NULL;
167 size_t allocated_length = 0;
169 size_t read_line_count = 0;
170 ssize_t read_char_count;
171 while ((read_char_count = getline(&line_read, &allocated_length, fp)) != -1) {
172 ASSERT_EQ(read_char_count, static_cast<int>(strlen(line_written)));
173 ASSERT_GE(allocated_length, strlen(line_written));
174 ASSERT_STREQ(line_read, line_written);
175 ++read_line_count;
176 }
177 ASSERT_EQ(read_line_count, line_count);
179 // The last read should have set the end-of-file indicator for the stream.
180 ASSERT_TRUE(feof(fp));
181 clearerr(fp);
183 // getline returns -1 but doesn't set errno if we're already at EOF.
184 // It should set the end-of-file indicator for the stream, though.
185 errno = 0;
186 ASSERT_EQ(getline(&line_read, &allocated_length, fp), -1);
187 ASSERT_EQ(0, errno);
188 ASSERT_TRUE(feof(fp));
190 free(line_read);
191 fclose(fp);
192 }
194 TEST(stdio, getline_invalid) {
195 FILE* fp = tmpfile();
196 ASSERT_TRUE(fp != NULL);
198 char* buffer = NULL;
199 size_t buffer_length = 0;
201 // The first argument can't be NULL.
202 errno = 0;
203 ASSERT_EQ(getline(NULL, &buffer_length, fp), -1);
204 ASSERT_EQ(EINVAL, errno);
206 // The second argument can't be NULL.
207 errno = 0;
208 ASSERT_EQ(getline(&buffer, NULL, fp), -1);
209 ASSERT_EQ(EINVAL, errno);
211 // The underlying fd can't be closed.
212 ASSERT_EQ(0, close(fileno(fp)));
213 errno = 0;
214 ASSERT_EQ(getline(&buffer, &buffer_length, fp), -1);
215 ASSERT_EQ(EBADF, errno);
216 fclose(fp);
217 }
219 TEST(stdio, printf_ssize_t) {
220 // http://b/8253769
221 ASSERT_EQ(sizeof(ssize_t), sizeof(long int));
222 ASSERT_EQ(sizeof(ssize_t), sizeof(size_t));
223 // For our 32-bit ABI, we had a ssize_t definition that confuses GCC into saying:
224 // error: format '%zd' expects argument of type 'signed size_t',
225 // but argument 4 has type 'ssize_t {aka long int}' [-Werror=format]
226 ssize_t v = 1;
227 char buf[32];
228 snprintf(buf, sizeof(buf), "%zd", v);
229 }
231 // https://code.google.com/p/android/issues/detail?id=64886
232 TEST(stdio, snprintf_a) {
233 char buf[BUFSIZ];
234 EXPECT_EQ(23, snprintf(buf, sizeof(buf), "<%a>", 9990.235));
235 EXPECT_STREQ("<0x1.3831e147ae148p+13>", buf);
236 }
238 TEST(stdio, snprintf_lc) {
239 char buf[BUFSIZ];
240 wint_t wc = L'a';
241 EXPECT_EQ(3, snprintf(buf, sizeof(buf), "<%lc>", wc));
242 EXPECT_STREQ("<a>", buf);
243 }
245 TEST(stdio, snprintf_ls) {
246 char buf[BUFSIZ];
247 wchar_t* ws = NULL;
248 EXPECT_EQ(8, snprintf(buf, sizeof(buf), "<%ls>", ws));
249 EXPECT_STREQ("<(null)>", buf);
251 wchar_t chars[] = { L'h', L'i', 0 };
252 ws = chars;
253 EXPECT_EQ(4, snprintf(buf, sizeof(buf), "<%ls>", ws));
254 EXPECT_STREQ("<hi>", buf);
255 }
257 TEST(stdio, snprintf_n) {
258 #if defined(__BIONIC__)
259 // http://b/14492135
260 char buf[32];
261 int i = 1234;
262 EXPECT_EQ(5, snprintf(buf, sizeof(buf), "a %n b", &i));
263 EXPECT_EQ(1234, i);
264 EXPECT_STREQ("a n b", buf);
265 #else
266 GTEST_LOG_(INFO) << "This test does nothing.\n";
267 #endif
268 }
270 TEST(stdio, snprintf_smoke) {
271 char buf[BUFSIZ];
273 snprintf(buf, sizeof(buf), "a");
274 EXPECT_STREQ("a", buf);
276 snprintf(buf, sizeof(buf), "%%");
277 EXPECT_STREQ("%", buf);
279 snprintf(buf, sizeof(buf), "01234");
280 EXPECT_STREQ("01234", buf);
282 snprintf(buf, sizeof(buf), "a%sb", "01234");
283 EXPECT_STREQ("a01234b", buf);
285 char* s = NULL;
286 snprintf(buf, sizeof(buf), "a%sb", s);
287 EXPECT_STREQ("a(null)b", buf);
289 snprintf(buf, sizeof(buf), "aa%scc", "bb");
290 EXPECT_STREQ("aabbcc", buf);
292 snprintf(buf, sizeof(buf), "a%cc", 'b');
293 EXPECT_STREQ("abc", buf);
295 snprintf(buf, sizeof(buf), "a%db", 1234);
296 EXPECT_STREQ("a1234b", buf);
298 snprintf(buf, sizeof(buf), "a%db", -8123);
299 EXPECT_STREQ("a-8123b", buf);
301 snprintf(buf, sizeof(buf), "a%hdb", static_cast<short>(0x7fff0010));
302 EXPECT_STREQ("a16b", buf);
304 snprintf(buf, sizeof(buf), "a%hhdb", static_cast<char>(0x7fffff10));
305 EXPECT_STREQ("a16b", buf);
307 snprintf(buf, sizeof(buf), "a%lldb", 0x1000000000LL);
308 EXPECT_STREQ("a68719476736b", buf);
310 snprintf(buf, sizeof(buf), "a%ldb", 70000L);
311 EXPECT_STREQ("a70000b", buf);
313 snprintf(buf, sizeof(buf), "a%pb", reinterpret_cast<void*>(0xb0001234));
314 EXPECT_STREQ("a0xb0001234b", buf);
316 snprintf(buf, sizeof(buf), "a%xz", 0x12ab);
317 EXPECT_STREQ("a12abz", buf);
319 snprintf(buf, sizeof(buf), "a%Xz", 0x12ab);
320 EXPECT_STREQ("a12ABz", buf);
322 snprintf(buf, sizeof(buf), "a%08xz", 0x123456);
323 EXPECT_STREQ("a00123456z", buf);
325 snprintf(buf, sizeof(buf), "a%5dz", 1234);
326 EXPECT_STREQ("a 1234z", buf);
328 snprintf(buf, sizeof(buf), "a%05dz", 1234);
329 EXPECT_STREQ("a01234z", buf);
331 snprintf(buf, sizeof(buf), "a%8dz", 1234);
332 EXPECT_STREQ("a 1234z", buf);
334 snprintf(buf, sizeof(buf), "a%-8dz", 1234);
335 EXPECT_STREQ("a1234 z", buf);
337 snprintf(buf, sizeof(buf), "A%-11sZ", "abcdef");
338 EXPECT_STREQ("Aabcdef Z", buf);
340 snprintf(buf, sizeof(buf), "A%s:%dZ", "hello", 1234);
341 EXPECT_STREQ("Ahello:1234Z", buf);
343 snprintf(buf, sizeof(buf), "a%03d:%d:%02dz", 5, 5, 5);
344 EXPECT_STREQ("a005:5:05z", buf);
346 void* p = NULL;
347 snprintf(buf, sizeof(buf), "a%d,%pz", 5, p);
348 #if defined(__BIONIC__)
349 EXPECT_STREQ("a5,0x0z", buf);
350 #else // __BIONIC__
351 EXPECT_STREQ("a5,(nil)z", buf);
352 #endif // __BIONIC__
354 snprintf(buf, sizeof(buf), "a%lld,%d,%d,%dz", 0x1000000000LL, 6, 7, 8);
355 EXPECT_STREQ("a68719476736,6,7,8z", buf);
357 snprintf(buf, sizeof(buf), "a_%f_b", 1.23f);
358 EXPECT_STREQ("a_1.230000_b", buf);
360 snprintf(buf, sizeof(buf), "a_%g_b", 3.14);
361 EXPECT_STREQ("a_3.14_b", buf);
363 snprintf(buf, sizeof(buf), "%1$s %1$s", "print_me_twice");
364 EXPECT_STREQ("print_me_twice print_me_twice", buf);
365 }
367 template <typename T>
368 void CheckInfNan(int snprintf_fn(T*, size_t, const T*, ...),
369 const T* fmt, const T* fmt_plus,
370 const T* minus_inf, const T* inf_, const T* plus_inf,
371 const T* minus_nan, const T* nan_, const T* plus_nan) {
372 T buf[BUFSIZ];
374 snprintf_fn(buf, sizeof(buf), fmt, nan(""));
375 EXPECT_STREQ(nan_, buf) << fmt;
376 snprintf_fn(buf, sizeof(buf), fmt, -nan(""));
377 EXPECT_STREQ(minus_nan, buf) << fmt;
378 snprintf_fn(buf, sizeof(buf), fmt_plus, nan(""));
379 EXPECT_STREQ(plus_nan, buf) << fmt_plus;
380 snprintf_fn(buf, sizeof(buf), fmt_plus, -nan(""));
381 EXPECT_STREQ(minus_nan, buf) << fmt_plus;
383 snprintf_fn(buf, sizeof(buf), fmt, HUGE_VAL);
384 EXPECT_STREQ(inf_, buf) << fmt;
385 snprintf_fn(buf, sizeof(buf), fmt, -HUGE_VAL);
386 EXPECT_STREQ(minus_inf, buf) << fmt;
387 snprintf_fn(buf, sizeof(buf), fmt_plus, HUGE_VAL);
388 EXPECT_STREQ(plus_inf, buf) << fmt_plus;
389 snprintf_fn(buf, sizeof(buf), fmt_plus, -HUGE_VAL);
390 EXPECT_STREQ(minus_inf, buf) << fmt_plus;
391 }
393 TEST(stdio, snprintf_inf_nan) {
394 CheckInfNan(snprintf, "%a", "%+a", "-inf", "inf", "+inf", "-nan", "nan", "+nan");
395 CheckInfNan(snprintf, "%A", "%+A", "-INF", "INF", "+INF", "-NAN", "NAN", "+NAN");
396 CheckInfNan(snprintf, "%e", "%+e", "-inf", "inf", "+inf", "-nan", "nan", "+nan");
397 CheckInfNan(snprintf, "%E", "%+E", "-INF", "INF", "+INF", "-NAN", "NAN", "+NAN");
398 CheckInfNan(snprintf, "%f", "%+f", "-inf", "inf", "+inf", "-nan", "nan", "+nan");
399 CheckInfNan(snprintf, "%F", "%+F", "-INF", "INF", "+INF", "-NAN", "NAN", "+NAN");
400 CheckInfNan(snprintf, "%g", "%+g", "-inf", "inf", "+inf", "-nan", "nan", "+nan");
401 CheckInfNan(snprintf, "%G", "%+G", "-INF", "INF", "+INF", "-NAN", "NAN", "+NAN");
402 }
404 TEST(stdio, wsprintf_inf_nan) {
405 CheckInfNan(swprintf, L"%a", L"%+a", L"-inf", L"inf", L"+inf", L"-nan", L"nan", L"+nan");
406 CheckInfNan(swprintf, L"%A", L"%+A", L"-INF", L"INF", L"+INF", L"-NAN", L"NAN", L"+NAN");
407 CheckInfNan(swprintf, L"%e", L"%+e", L"-inf", L"inf", L"+inf", L"-nan", L"nan", L"+nan");
408 CheckInfNan(swprintf, L"%E", L"%+E", L"-INF", L"INF", L"+INF", L"-NAN", L"NAN", L"+NAN");
409 CheckInfNan(swprintf, L"%f", L"%+f", L"-inf", L"inf", L"+inf", L"-nan", L"nan", L"+nan");
410 CheckInfNan(swprintf, L"%F", L"%+F", L"-INF", L"INF", L"+INF", L"-NAN", L"NAN", L"+NAN");
411 CheckInfNan(swprintf, L"%g", L"%+g", L"-inf", L"inf", L"+inf", L"-nan", L"nan", L"+nan");
412 CheckInfNan(swprintf, L"%G", L"%+G", L"-INF", L"INF", L"+INF", L"-NAN", L"NAN", L"+NAN");
413 }
415 TEST(stdio, snprintf_d_INT_MAX) {
416 char buf[BUFSIZ];
417 snprintf(buf, sizeof(buf), "%d", INT_MAX);
418 EXPECT_STREQ("2147483647", buf);
419 }
421 TEST(stdio, snprintf_d_INT_MIN) {
422 char buf[BUFSIZ];
423 snprintf(buf, sizeof(buf), "%d", INT_MIN);
424 EXPECT_STREQ("-2147483648", buf);
425 }
427 TEST(stdio, snprintf_ld_LONG_MAX) {
428 char buf[BUFSIZ];
429 snprintf(buf, sizeof(buf), "%ld", LONG_MAX);
430 #if __LP64__
431 EXPECT_STREQ("9223372036854775807", buf);
432 #else
433 EXPECT_STREQ("2147483647", buf);
434 #endif
435 }
437 TEST(stdio, snprintf_ld_LONG_MIN) {
438 char buf[BUFSIZ];
439 snprintf(buf, sizeof(buf), "%ld", LONG_MIN);
440 #if __LP64__
441 EXPECT_STREQ("-9223372036854775808", buf);
442 #else
443 EXPECT_STREQ("-2147483648", buf);
444 #endif
445 }
447 TEST(stdio, snprintf_lld_LLONG_MAX) {
448 char buf[BUFSIZ];
449 snprintf(buf, sizeof(buf), "%lld", LLONG_MAX);
450 EXPECT_STREQ("9223372036854775807", buf);
451 }
453 TEST(stdio, snprintf_lld_LLONG_MIN) {
454 char buf[BUFSIZ];
455 snprintf(buf, sizeof(buf), "%lld", LLONG_MIN);
456 EXPECT_STREQ("-9223372036854775808", buf);
457 }
459 TEST(stdio, snprintf_e) {
460 char buf[BUFSIZ];
462 snprintf(buf, sizeof(buf), "%e", 1.5);
463 EXPECT_STREQ("1.500000e+00", buf);
465 snprintf(buf, sizeof(buf), "%Le", 1.5l);
466 EXPECT_STREQ("1.500000e+00", buf);
467 }
469 TEST(stdio, snprintf_negative_zero_5084292) {
470 char buf[BUFSIZ];
472 snprintf(buf, sizeof(buf), "%e", -0.0);
473 EXPECT_STREQ("-0.000000e+00", buf);
474 snprintf(buf, sizeof(buf), "%E", -0.0);
475 EXPECT_STREQ("-0.000000E+00", buf);
476 snprintf(buf, sizeof(buf), "%f", -0.0);
477 EXPECT_STREQ("-0.000000", buf);
478 snprintf(buf, sizeof(buf), "%F", -0.0);
479 EXPECT_STREQ("-0.000000", buf);
480 snprintf(buf, sizeof(buf), "%g", -0.0);
481 EXPECT_STREQ("-0", buf);
482 snprintf(buf, sizeof(buf), "%G", -0.0);
483 EXPECT_STREQ("-0", buf);
484 snprintf(buf, sizeof(buf), "%a", -0.0);
485 EXPECT_STREQ("-0x0p+0", buf);
486 snprintf(buf, sizeof(buf), "%A", -0.0);
487 EXPECT_STREQ("-0X0P+0", buf);
488 }
490 TEST(stdio, snprintf_utf8_15439554) {
491 locale_t cloc = newlocale(LC_ALL, "C.UTF-8", 0);
492 locale_t old_locale = uselocale(cloc);
494 // http://b/15439554
495 char buf[BUFSIZ];
497 // 1-byte character.
498 snprintf(buf, sizeof(buf), "%dx%d", 1, 2);
499 EXPECT_STREQ("1x2", buf);
500 // 2-byte character.
501 snprintf(buf, sizeof(buf), "%d\xc2\xa2%d", 1, 2);
502 EXPECT_STREQ("1¢2", buf);
503 // 3-byte character.
504 snprintf(buf, sizeof(buf), "%d\xe2\x82\xac%d", 1, 2);
505 EXPECT_STREQ("1€2", buf);
506 // 4-byte character.
507 snprintf(buf, sizeof(buf), "%d\xf0\xa4\xad\xa2%d", 1, 2);
508 EXPECT_STREQ("1ð¤¢2", buf);
510 uselocale(old_locale);
511 freelocale(cloc);
512 }
514 TEST(stdio, fprintf_failures_7229520) {
515 // http://b/7229520
516 FILE* fp;
518 // Unbuffered case where the fprintf(3) itself fails.
519 ASSERT_NE(nullptr, fp = tmpfile());
520 setbuf(fp, NULL);
521 ASSERT_EQ(4, fprintf(fp, "epic"));
522 ASSERT_EQ(0, close(fileno(fp)));
523 ASSERT_EQ(-1, fprintf(fp, "fail"));
524 ASSERT_EQ(-1, fclose(fp));
526 // Buffered case where we won't notice until the fclose(3).
527 // It's likely this is what was actually seen in http://b/7229520,
528 // and that expecting fprintf to fail is setting yourself up for
529 // disappointment. Remember to check fclose(3)'s return value, kids!
530 ASSERT_NE(nullptr, fp = tmpfile());
531 ASSERT_EQ(4, fprintf(fp, "epic"));
532 ASSERT_EQ(0, close(fileno(fp)));
533 ASSERT_EQ(4, fprintf(fp, "fail"));
534 ASSERT_EQ(-1, fclose(fp));
535 }
537 TEST(stdio, popen) {
538 FILE* fp = popen("cat /proc/version", "r");
539 ASSERT_TRUE(fp != NULL);
541 char buf[16];
542 char* s = fgets(buf, sizeof(buf), fp);
543 buf[13] = '\0';
544 ASSERT_STREQ("Linux version", s);
546 ASSERT_EQ(0, pclose(fp));
547 }
549 TEST(stdio, getc) {
550 FILE* fp = fopen("/proc/version", "r");
551 ASSERT_TRUE(fp != NULL);
552 ASSERT_EQ('L', getc(fp));
553 ASSERT_EQ('i', getc(fp));
554 ASSERT_EQ('n', getc(fp));
555 ASSERT_EQ('u', getc(fp));
556 ASSERT_EQ('x', getc(fp));
557 fclose(fp);
558 }
560 TEST(stdio, putc) {
561 FILE* fp = fopen("/proc/version", "r");
562 ASSERT_TRUE(fp != NULL);
563 ASSERT_EQ(EOF, putc('x', fp));
564 fclose(fp);
565 }
567 TEST(stdio, sscanf) {
568 char s1[123];
569 int i1;
570 double d1;
571 char s2[123];
572 ASSERT_EQ(3, sscanf(" hello 123 1.23 ", "%s %i %lf %s", s1, &i1, &d1, s2));
573 ASSERT_STREQ("hello", s1);
574 ASSERT_EQ(123, i1);
575 ASSERT_DOUBLE_EQ(1.23, d1);
576 }
578 TEST(stdio, cantwrite_EBADF) {
579 // If we open a file read-only...
580 FILE* fp = fopen("/proc/version", "r");
582 // ...all attempts to write to that file should return failure.
584 // They should also set errno to EBADF. This isn't POSIX, but it's traditional.
585 // glibc gets the wide-character functions wrong.
587 errno = 0;
588 EXPECT_EQ(EOF, putc('x', fp));
589 EXPECT_EQ(EBADF, errno);
591 errno = 0;
592 EXPECT_EQ(EOF, fprintf(fp, "hello"));
593 EXPECT_EQ(EBADF, errno);
595 errno = 0;
596 EXPECT_EQ(EOF, fwprintf(fp, L"hello"));
597 #if defined(__BIONIC__)
598 EXPECT_EQ(EBADF, errno);
599 #endif
601 errno = 0;
602 EXPECT_EQ(0U, fwrite("hello", 1, 2, fp));
603 EXPECT_EQ(EBADF, errno);
605 errno = 0;
606 EXPECT_EQ(EOF, fputs("hello", fp));
607 EXPECT_EQ(EBADF, errno);
609 errno = 0;
610 EXPECT_EQ(WEOF, fputwc(L'x', fp));
611 #if defined(__BIONIC__)
612 EXPECT_EQ(EBADF, errno);
613 #endif
614 }
616 // Tests that we can only have a consistent and correct fpos_t when using
617 // f*pos functions (i.e. fpos doesn't get inside a multi byte character).
618 TEST(stdio, consistent_fpos_t) {
619 ASSERT_STREQ("C.UTF-8", setlocale(LC_CTYPE, "C.UTF-8"));
620 uselocale(LC_GLOBAL_LOCALE);
622 FILE* fp = tmpfile();
623 ASSERT_TRUE(fp != NULL);
625 wchar_t mb_one_bytes = L'h';
626 wchar_t mb_two_bytes = 0x00a2;
627 wchar_t mb_three_bytes = 0x20ac;
628 wchar_t mb_four_bytes = 0x24b62;
630 // Write to file.
631 ASSERT_EQ(mb_one_bytes, static_cast<wchar_t>(fputwc(mb_one_bytes, fp)));
632 ASSERT_EQ(mb_two_bytes, static_cast<wchar_t>(fputwc(mb_two_bytes, fp)));
633 ASSERT_EQ(mb_three_bytes, static_cast<wchar_t>(fputwc(mb_three_bytes, fp)));
634 ASSERT_EQ(mb_four_bytes, static_cast<wchar_t>(fputwc(mb_four_bytes, fp)));
636 rewind(fp);
638 // Record each character position.
639 fpos_t pos1;
640 fpos_t pos2;
641 fpos_t pos3;
642 fpos_t pos4;
643 fpos_t pos5;
644 EXPECT_EQ(0, fgetpos(fp, &pos1));
645 ASSERT_EQ(mb_one_bytes, static_cast<wchar_t>(fgetwc(fp)));
646 EXPECT_EQ(0, fgetpos(fp, &pos2));
647 ASSERT_EQ(mb_two_bytes, static_cast<wchar_t>(fgetwc(fp)));
648 EXPECT_EQ(0, fgetpos(fp, &pos3));
649 ASSERT_EQ(mb_three_bytes, static_cast<wchar_t>(fgetwc(fp)));
650 EXPECT_EQ(0, fgetpos(fp, &pos4));
651 ASSERT_EQ(mb_four_bytes, static_cast<wchar_t>(fgetwc(fp)));
652 EXPECT_EQ(0, fgetpos(fp, &pos5));
654 #if defined(__BIONIC__)
655 // Bionic's fpos_t is just an alias for off_t. This is inherited from OpenBSD
656 // upstream. Glibc differs by storing the mbstate_t inside its fpos_t. In
657 // Bionic (and upstream OpenBSD) the mbstate_t is stored inside the FILE
658 // structure.
659 ASSERT_EQ(0, static_cast<off_t>(pos1));
660 ASSERT_EQ(1, static_cast<off_t>(pos2));
661 ASSERT_EQ(3, static_cast<off_t>(pos3));
662 ASSERT_EQ(6, static_cast<off_t>(pos4));
663 ASSERT_EQ(10, static_cast<off_t>(pos5));
664 #endif
666 // Exercise back and forth movements of the position.
667 ASSERT_EQ(0, fsetpos(fp, &pos2));
668 ASSERT_EQ(mb_two_bytes, static_cast<wchar_t>(fgetwc(fp)));
669 ASSERT_EQ(0, fsetpos(fp, &pos1));
670 ASSERT_EQ(mb_one_bytes, static_cast<wchar_t>(fgetwc(fp)));
671 ASSERT_EQ(0, fsetpos(fp, &pos4));
672 ASSERT_EQ(mb_four_bytes, static_cast<wchar_t>(fgetwc(fp)));
673 ASSERT_EQ(0, fsetpos(fp, &pos3));
674 ASSERT_EQ(mb_three_bytes, static_cast<wchar_t>(fgetwc(fp)));
675 ASSERT_EQ(0, fsetpos(fp, &pos5));
676 ASSERT_EQ(WEOF, fgetwc(fp));
678 fclose(fp);
679 }
681 // Exercise the interaction between fpos and seek.
682 TEST(stdio, fpos_t_and_seek) {
683 ASSERT_STREQ("C.UTF-8", setlocale(LC_CTYPE, "C.UTF-8"));
684 uselocale(LC_GLOBAL_LOCALE);
686 // In glibc-2.16 fseek doesn't work properly in wide mode
687 // (https://sourceware.org/bugzilla/show_bug.cgi?id=14543). One workaround is
688 // to close and re-open the file. We do it in order to make the test pass
689 // with all glibcs.
691 TemporaryFile tf;
692 FILE* fp = fdopen(tf.fd, "w+");
693 ASSERT_TRUE(fp != NULL);
695 wchar_t mb_two_bytes = 0x00a2;
696 wchar_t mb_three_bytes = 0x20ac;
697 wchar_t mb_four_bytes = 0x24b62;
699 // Write to file.
700 ASSERT_EQ(mb_two_bytes, static_cast<wchar_t>(fputwc(mb_two_bytes, fp)));
701 ASSERT_EQ(mb_three_bytes, static_cast<wchar_t>(fputwc(mb_three_bytes, fp)));
702 ASSERT_EQ(mb_four_bytes, static_cast<wchar_t>(fputwc(mb_four_bytes, fp)));
704 fflush(fp);
705 fclose(fp);
707 fp = fopen(tf.filename, "r");
708 ASSERT_TRUE(fp != NULL);
710 // Store a valid position.
711 fpos_t mb_two_bytes_pos;
712 ASSERT_EQ(0, fgetpos(fp, &mb_two_bytes_pos));
714 // Move inside mb_four_bytes with fseek.
715 long offset_inside_mb = 6;
716 ASSERT_EQ(0, fseek(fp, offset_inside_mb, SEEK_SET));
718 // Store the "inside multi byte" position.
719 fpos_t pos_inside_mb;
720 ASSERT_EQ(0, fgetpos(fp, &pos_inside_mb));
721 #if defined(__BIONIC__)
722 ASSERT_EQ(offset_inside_mb, static_cast<off_t>(pos_inside_mb));
723 #endif
725 // Reading from within a byte should produce an error.
726 ASSERT_EQ(WEOF, fgetwc(fp));
727 ASSERT_EQ(EILSEQ, errno);
729 // Reverting to a valid position should work.
730 ASSERT_EQ(0, fsetpos(fp, &mb_two_bytes_pos));
731 ASSERT_EQ(mb_two_bytes, static_cast<wchar_t>(fgetwc(fp)));
733 // Moving withing a multi byte with fsetpos should work but reading should
734 // produce an error.
735 ASSERT_EQ(0, fsetpos(fp, &pos_inside_mb));
736 ASSERT_EQ(WEOF, fgetwc(fp));
737 ASSERT_EQ(EILSEQ, errno);
739 fclose(fp);
740 }
742 TEST(stdio, fmemopen) {
743 char buf[16];
744 memset(buf, 0, sizeof(buf));
745 FILE* fp = fmemopen(buf, sizeof(buf), "r+");
746 ASSERT_EQ('<', fputc('<', fp));
747 ASSERT_NE(EOF, fputs("abc>\n", fp));
748 fflush(fp);
750 ASSERT_STREQ("<abc>\n", buf);
752 rewind(fp);
754 char line[16];
755 char* s = fgets(line, sizeof(line), fp);
756 ASSERT_TRUE(s != NULL);
757 ASSERT_STREQ("<abc>\n", s);
759 fclose(fp);
760 }
762 TEST(stdio, fmemopen_NULL) {
763 FILE* fp = fmemopen(nullptr, 128, "r+");
764 ASSERT_NE(EOF, fputs("xyz\n", fp));
766 rewind(fp);
768 char line[16];
769 char* s = fgets(line, sizeof(line), fp);
770 ASSERT_TRUE(s != NULL);
771 ASSERT_STREQ("xyz\n", s);
773 fclose(fp);
774 }
776 TEST(stdio, fmemopen_EINVAL) {
777 char buf[16];
779 // Invalid size.
780 errno = 0;
781 ASSERT_EQ(nullptr, fmemopen(buf, 0, "r+"));
782 ASSERT_EQ(EINVAL, errno);
784 // No '+' with NULL buffer.
785 errno = 0;
786 ASSERT_EQ(nullptr, fmemopen(nullptr, 0, "r"));
787 ASSERT_EQ(EINVAL, errno);
788 }
790 TEST(stdio, open_memstream) {
791 char* p = nullptr;
792 size_t size = 0;
793 FILE* fp = open_memstream(&p, &size);
794 ASSERT_NE(EOF, fputs("hello, world!", fp));
795 fclose(fp);
797 ASSERT_STREQ("hello, world!", p);
798 ASSERT_EQ(strlen("hello, world!"), size);
799 free(p);
800 }
802 TEST(stdio, open_memstream_EINVAL) {
803 #if defined(__BIONIC__)
804 char* p;
805 size_t size;
807 // Invalid buffer.
808 errno = 0;
809 ASSERT_EQ(nullptr, open_memstream(nullptr, &size));
810 ASSERT_EQ(EINVAL, errno);
812 // Invalid size.
813 errno = 0;
814 ASSERT_EQ(nullptr, open_memstream(&p, nullptr));
815 ASSERT_EQ(EINVAL, errno);
816 #else
817 GTEST_LOG_(INFO) << "This test does nothing.\n";
818 #endif
819 }
821 TEST(stdio, fdopen_CLOEXEC) {
822 int fd = open("/proc/version", O_RDONLY);
823 ASSERT_TRUE(fd != -1);
825 // This fd doesn't have O_CLOEXEC...
826 int flags = fcntl(fd, F_GETFD);
827 ASSERT_TRUE(flags != -1);
828 ASSERT_EQ(0, flags & FD_CLOEXEC);
830 FILE* fp = fdopen(fd, "re");
831 ASSERT_TRUE(fp != NULL);
833 // ...but the new one does.
834 flags = fcntl(fileno(fp), F_GETFD);
835 ASSERT_TRUE(flags != -1);
836 ASSERT_EQ(FD_CLOEXEC, flags & FD_CLOEXEC);
838 fclose(fp);
839 close(fd);
840 }
842 TEST(stdio, freopen_CLOEXEC) {
843 FILE* fp = fopen("/proc/version", "r");
844 ASSERT_TRUE(fp != NULL);
846 // This FILE* doesn't have O_CLOEXEC...
847 int flags = fcntl(fileno(fp), F_GETFD);
848 ASSERT_TRUE(flags != -1);
849 ASSERT_EQ(0, flags & FD_CLOEXEC);
851 fp = freopen("/proc/version", "re", fp);
853 // ...but the new one does.
854 flags = fcntl(fileno(fp), F_GETFD);
855 ASSERT_TRUE(flags != -1);
856 ASSERT_EQ(FD_CLOEXEC, flags & FD_CLOEXEC);
858 fclose(fp);
859 }
861 // https://code.google.com/p/android/issues/detail?id=81155
862 // http://b/18556607
863 TEST(stdio, fread_unbuffered_pathological_performance) {
864 FILE* fp = fopen("/dev/zero", "r");
865 ASSERT_TRUE(fp != NULL);
867 // Make this stream unbuffered.
868 setvbuf(fp, 0, _IONBF, 0);
870 char buf[65*1024];
871 memset(buf, 0xff, sizeof(buf));
873 time_t t0 = time(NULL);
874 for (size_t i = 0; i < 1024; ++i) {
875 fread(buf, 64*1024, 1, fp);
876 }
877 time_t t1 = time(NULL);
879 fclose(fp);
881 // 1024 64KiB reads should have been very quick.
882 ASSERT_LE(t1 - t0, 1);
884 for (size_t i = 0; i < 64*1024; ++i) {
885 ASSERT_EQ('\0', buf[i]);
886 }
887 for (size_t i = 64*1024; i < 65*1024; ++i) {
888 ASSERT_EQ('\xff', buf[i]);
889 }
890 }