tests/stdio_test.cpp - fp2-dev/platform/bionic - Gitiles

 /*
  * 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 <limits.h>
 #include <stdio.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>

 TEST(stdio, tmpfile_fileno_fprintf_rewind_fgets) {
   FILE* fp = tmpfile();
   ASSERT_TRUE(fp != NULL);

   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);

   rewind(fp);

   char buf[16];
   char* s = fgets(buf, sizeof(buf), fp);
   ASSERT_TRUE(s != NULL);
   ASSERT_STREQ("hello\n", s);

   fclose(fp);
 }

 TEST(stdio, getdelim) {
   FILE* fp = tmpfile();
   ASSERT_TRUE(fp != NULL);

   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 = NULL;
   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(word_read, expected[i]);
   }
   // 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.
   errno = 0;
   ASSERT_EQ(getdelim(&word_read, &allocated_length, ' ', fp), -1);
   ASSERT_EQ(0, errno);
   ASSERT_TRUE(feof(fp));

   free(word_read);
   fclose(fp);
 }

 TEST(stdio, getdelim_invalid) {
   FILE* fp = tmpfile();

   char* buffer = NULL;
   size_t buffer_length = 0;

   // The first argument can't be NULL.
   errno = 0;
   ASSERT_EQ(getdelim(NULL, &buffer_length, ' ', fp), -1);
   ASSERT_EQ(EINVAL, errno);

   // The second argument can't be NULL.
   errno = 0;
   ASSERT_EQ(getdelim(&buffer, NULL, ' ', fp), -1);
   ASSERT_EQ(EINVAL, errno);

   // The stream can't be closed.
   fclose(fp);
   errno = 0;
   ASSERT_EQ(getdelim(&buffer, &buffer_length, ' ', fp), -1);
   ASSERT_EQ(EBADF, errno);
 }

 TEST(stdio, getline) {
   FILE* fp = tmpfile();
   ASSERT_TRUE(fp != NULL);

   const char* line_written = "This is a test for getline\n";
   const size_t line_count = 5;

   for (size_t i = 0; i < line_count; ++i) {
     int rc = fprintf(fp, "%s", line_written);
     ASSERT_EQ(rc, static_cast<int>(strlen(line_written)));
   }

   rewind(fp);

   char* line_read = NULL;
   size_t allocated_length = 0;

   size_t read_line_count = 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>(strlen(line_written)));
     ASSERT_GE(allocated_length, strlen(line_written));
     ASSERT_STREQ(line_read, line_written);
     ++read_line_count;
   }
   ASSERT_EQ(read_line_count, line_count);

   // 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.
   errno = 0;
   ASSERT_EQ(getline(&line_read, &allocated_length, fp), -1);
   ASSERT_EQ(0, errno);
   ASSERT_TRUE(feof(fp));

   free(line_read);
   fclose(fp);
 }

 TEST(stdio, getline_invalid) {
   FILE* fp = tmpfile();

   char* buffer = NULL;
   size_t buffer_length = 0;

   // The first argument can't be NULL.
   errno = 0;
   ASSERT_EQ(getline(NULL, &buffer_length, fp), -1);
   ASSERT_EQ(EINVAL, errno);

   // The second argument can't be NULL.
   errno = 0;
   ASSERT_EQ(getline(&buffer, NULL, fp), -1);
   ASSERT_EQ(EINVAL, errno);

   // The stream can't be closed.
   fclose(fp);
   errno = 0;
   ASSERT_EQ(getline(&buffer, &buffer_length, fp), -1);
   ASSERT_EQ(EBADF, errno);
 }

 TEST(stdio, 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;
   char buf[32];
   snprintf(buf, sizeof(buf), "%zd", v);
 }

 #if !defined(__GLIBC__)
 TEST(stdio, snprintf_n_format_specifier_not_implemented) {
   char buf[32];
   int i = 0;
   // We deliberately don't implement %n, so it's treated like
   // any other unrecognized format specifier.
   EXPECT_EQ(5, snprintf(buf, sizeof(buf), "a %n b", &i));
   EXPECT_EQ(0, i);
   EXPECT_STREQ("a n b", buf);
 }
 #endif

 TEST(stdio, snprintf_smoke) {
   char buf[BUFSIZ];

   snprintf(buf, sizeof(buf), "a");
   EXPECT_STREQ("a", buf);

   snprintf(buf, sizeof(buf), "%%");
   EXPECT_STREQ("%", buf);

   snprintf(buf, sizeof(buf), "01234");
   EXPECT_STREQ("01234", buf);

   snprintf(buf, sizeof(buf), "a%sb", "01234");
   EXPECT_STREQ("a01234b", buf);

   char* s = NULL;
   snprintf(buf, sizeof(buf), "a%sb", s);
   EXPECT_STREQ("a(null)b", buf);

   snprintf(buf, sizeof(buf), "aa%scc", "bb");
   EXPECT_STREQ("aabbcc", buf);

   snprintf(buf, sizeof(buf), "a%cc", 'b');
   EXPECT_STREQ("abc", buf);

   snprintf(buf, sizeof(buf), "a%db", 1234);
   EXPECT_STREQ("a1234b", buf);

   snprintf(buf, sizeof(buf), "a%db", -8123);
   EXPECT_STREQ("a-8123b", buf);

   snprintf(buf, sizeof(buf), "a%hdb", static_cast<short>(0x7fff0010));
   EXPECT_STREQ("a16b", buf);

   snprintf(buf, sizeof(buf), "a%hhdb", static_cast<char>(0x7fffff10));
   EXPECT_STREQ("a16b", buf);

   snprintf(buf, sizeof(buf), "a%lldb", 0x1000000000LL);
   EXPECT_STREQ("a68719476736b", buf);

   snprintf(buf, sizeof(buf), "a%ldb", 70000L);
   EXPECT_STREQ("a70000b", buf);

   snprintf(buf, sizeof(buf), "a%pb", reinterpret_cast<void*>(0xb0001234));
   EXPECT_STREQ("a0xb0001234b", buf);

   snprintf(buf, sizeof(buf), "a%xz", 0x12ab);
   EXPECT_STREQ("a12abz", buf);

   snprintf(buf, sizeof(buf), "a%Xz", 0x12ab);
   EXPECT_STREQ("a12ABz", buf);

   snprintf(buf, sizeof(buf), "a%08xz", 0x123456);
   EXPECT_STREQ("a00123456z", buf);

   snprintf(buf, sizeof(buf), "a%5dz", 1234);
   EXPECT_STREQ("a 1234z", buf);

   snprintf(buf, sizeof(buf), "a%05dz", 1234);
   EXPECT_STREQ("a01234z", buf);

   snprintf(buf, sizeof(buf), "a%8dz", 1234);
   EXPECT_STREQ("a    1234z", buf);

   snprintf(buf, sizeof(buf), "a%-8dz", 1234);
   EXPECT_STREQ("a1234    z", buf);

   snprintf(buf, sizeof(buf), "A%-11sZ", "abcdef");
   EXPECT_STREQ("Aabcdef     Z", buf);

   snprintf(buf, sizeof(buf), "A%s:%dZ", "hello", 1234);
   EXPECT_STREQ("Ahello:1234Z", buf);

   snprintf(buf, sizeof(buf), "a%03d:%d:%02dz", 5, 5, 5);
   EXPECT_STREQ("a005:5:05z", buf);

   void* p = NULL;
   snprintf(buf, sizeof(buf), "a%d,%pz", 5, p);
   EXPECT_STREQ("a5,0x0z", buf);

   snprintf(buf, sizeof(buf), "a%lld,%d,%d,%dz", 0x1000000000LL, 6, 7, 8);
   EXPECT_STREQ("a68719476736,6,7,8z", buf);

   snprintf(buf, sizeof(buf), "a_%f_b", 1.23f);
   EXPECT_STREQ("a_1.230000_b", buf);

   snprintf(buf, sizeof(buf), "a_%g_b", 3.14);
   EXPECT_STREQ("a_3.14_b", buf);
 }

 TEST(stdio, snprintf_d_INT_MAX) {
   char buf[BUFSIZ];
   snprintf(buf, sizeof(buf), "%d", INT_MAX);
   EXPECT_STREQ("2147483647", buf);
 }

 TEST(stdio, snprintf_d_INT_MIN) {
   char buf[BUFSIZ];
   snprintf(buf, sizeof(buf), "%d", INT_MIN);
   EXPECT_STREQ("-2147483648", buf);
 }

 TEST(stdio, snprintf_ld_LONG_MAX) {
   char buf[BUFSIZ];
   snprintf(buf, sizeof(buf), "%ld", LONG_MAX);
   EXPECT_STREQ("2147483647", buf);
 }

 TEST(stdio, snprintf_ld_LONG_MIN) {
   char buf[BUFSIZ];
   snprintf(buf, sizeof(buf), "%ld", LONG_MIN);
   EXPECT_STREQ("-2147483648", buf);
 }

 TEST(stdio, snprintf_lld_LLONG_MAX) {
   char buf[BUFSIZ];
   snprintf(buf, sizeof(buf), "%lld", LLONG_MAX);
   EXPECT_STREQ("9223372036854775807", buf);
 }

 TEST(stdio, snprintf_lld_LLONG_MIN) {
   char buf[BUFSIZ];
   snprintf(buf, sizeof(buf), "%lld", LLONG_MIN);
   EXPECT_STREQ("-9223372036854775808", buf);
 }

 TEST(stdio, popen) {
   FILE* fp = popen("cat /proc/version", "r");
   ASSERT_TRUE(fp != NULL);

   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, getc) {
   FILE* fp = fopen("/proc/version", "r");
   ASSERT_TRUE(fp != NULL);
   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, putc) {
   FILE* fp = fopen("/proc/version", "r");
   ASSERT_TRUE(fp != NULL);
   ASSERT_EQ(EOF, putc('x', fp));
   fclose(fp);
 }
	/*
	* 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 <limits.h>
	#include <stdio.h>
	#include <sys/types.h>
	#include <sys/stat.h>
	#include <unistd.h>

	TEST(stdio, tmpfile_fileno_fprintf_rewind_fgets) {
	FILE* fp = tmpfile();
	ASSERT_TRUE(fp != NULL);

	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);

	rewind(fp);

	char buf[16];
	char* s = fgets(buf, sizeof(buf), fp);
	ASSERT_TRUE(s != NULL);
	ASSERT_STREQ("hello\n", s);

	fclose(fp);
	}

	TEST(stdio, getdelim) {
	FILE* fp = tmpfile();
	ASSERT_TRUE(fp != NULL);

	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 = NULL;
	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(word_read, expected[i]);
	}
	// 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.
	errno = 0;
	ASSERT_EQ(getdelim(&word_read, &allocated_length, ' ', fp), -1);
	ASSERT_EQ(0, errno);
	ASSERT_TRUE(feof(fp));

	free(word_read);
	fclose(fp);
	}

	TEST(stdio, getdelim_invalid) {
	FILE* fp = tmpfile();

	char* buffer = NULL;
	size_t buffer_length = 0;

	// The first argument can't be NULL.
	errno = 0;
	ASSERT_EQ(getdelim(NULL, &buffer_length, ' ', fp), -1);
	ASSERT_EQ(EINVAL, errno);

	// The second argument can't be NULL.
	errno = 0;
	ASSERT_EQ(getdelim(&buffer, NULL, ' ', fp), -1);
	ASSERT_EQ(EINVAL, errno);

	// The stream can't be closed.
	fclose(fp);
	errno = 0;
	ASSERT_EQ(getdelim(&buffer, &buffer_length, ' ', fp), -1);
	ASSERT_EQ(EBADF, errno);
	}

	TEST(stdio, getline) {
	FILE* fp = tmpfile();
	ASSERT_TRUE(fp != NULL);

	const char* line_written = "This is a test for getline\n";
	const size_t line_count = 5;

	for (size_t i = 0; i < line_count; ++i) {
	int rc = fprintf(fp, "%s", line_written);
	ASSERT_EQ(rc, static_cast<int>(strlen(line_written)));
	}

	rewind(fp);

	char* line_read = NULL;
	size_t allocated_length = 0;

	size_t read_line_count = 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>(strlen(line_written)));
	ASSERT_GE(allocated_length, strlen(line_written));
	ASSERT_STREQ(line_read, line_written);
	++read_line_count;
	}
	ASSERT_EQ(read_line_count, line_count);

	// 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.
	errno = 0;
	ASSERT_EQ(getline(&line_read, &allocated_length, fp), -1);
	ASSERT_EQ(0, errno);
	ASSERT_TRUE(feof(fp));

	free(line_read);
	fclose(fp);
	}

	TEST(stdio, getline_invalid) {
	FILE* fp = tmpfile();

	char* buffer = NULL;
	size_t buffer_length = 0;

	// The first argument can't be NULL.
	errno = 0;
	ASSERT_EQ(getline(NULL, &buffer_length, fp), -1);
	ASSERT_EQ(EINVAL, errno);

	// The second argument can't be NULL.
	errno = 0;
	ASSERT_EQ(getline(&buffer, NULL, fp), -1);
	ASSERT_EQ(EINVAL, errno);

	// The stream can't be closed.
	fclose(fp);
	errno = 0;
	ASSERT_EQ(getline(&buffer, &buffer_length, fp), -1);
	ASSERT_EQ(EBADF, errno);
	}

	TEST(stdio, 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;
	char buf[32];
	snprintf(buf, sizeof(buf), "%zd", v);
	}

	#if !defined(__GLIBC__)
	TEST(stdio, snprintf_n_format_specifier_not_implemented) {
	char buf[32];
	int i = 0;
	// We deliberately don't implement %n, so it's treated like
	// any other unrecognized format specifier.
	EXPECT_EQ(5, snprintf(buf, sizeof(buf), "a %n b", &i));
	EXPECT_EQ(0, i);
	EXPECT_STREQ("a n b", buf);
	}
	#endif

	TEST(stdio, snprintf_smoke) {
	char buf[BUFSIZ];

	snprintf(buf, sizeof(buf), "a");
	EXPECT_STREQ("a", buf);

	snprintf(buf, sizeof(buf), "%%");
	EXPECT_STREQ("%", buf);

	snprintf(buf, sizeof(buf), "01234");
	EXPECT_STREQ("01234", buf);

	snprintf(buf, sizeof(buf), "a%sb", "01234");
	EXPECT_STREQ("a01234b", buf);

	char* s = NULL;
	snprintf(buf, sizeof(buf), "a%sb", s);
	EXPECT_STREQ("a(null)b", buf);

	snprintf(buf, sizeof(buf), "aa%scc", "bb");
	EXPECT_STREQ("aabbcc", buf);

	snprintf(buf, sizeof(buf), "a%cc", 'b');
	EXPECT_STREQ("abc", buf);

	snprintf(buf, sizeof(buf), "a%db", 1234);
	EXPECT_STREQ("a1234b", buf);

	snprintf(buf, sizeof(buf), "a%db", -8123);
	EXPECT_STREQ("a-8123b", buf);

	snprintf(buf, sizeof(buf), "a%hdb", static_cast<short>(0x7fff0010));
	EXPECT_STREQ("a16b", buf);

	snprintf(buf, sizeof(buf), "a%hhdb", static_cast<char>(0x7fffff10));
	EXPECT_STREQ("a16b", buf);

	snprintf(buf, sizeof(buf), "a%lldb", 0x1000000000LL);
	EXPECT_STREQ("a68719476736b", buf);

	snprintf(buf, sizeof(buf), "a%ldb", 70000L);
	EXPECT_STREQ("a70000b", buf);

	snprintf(buf, sizeof(buf), "a%pb", reinterpret_cast<void*>(0xb0001234));
	EXPECT_STREQ("a0xb0001234b", buf);

	snprintf(buf, sizeof(buf), "a%xz", 0x12ab);
	EXPECT_STREQ("a12abz", buf);

	snprintf(buf, sizeof(buf), "a%Xz", 0x12ab);
	EXPECT_STREQ("a12ABz", buf);

	snprintf(buf, sizeof(buf), "a%08xz", 0x123456);
	EXPECT_STREQ("a00123456z", buf);

	snprintf(buf, sizeof(buf), "a%5dz", 1234);
	EXPECT_STREQ("a 1234z", buf);

	snprintf(buf, sizeof(buf), "a%05dz", 1234);
	EXPECT_STREQ("a01234z", buf);

	snprintf(buf, sizeof(buf), "a%8dz", 1234);
	EXPECT_STREQ("a 1234z", buf);

	snprintf(buf, sizeof(buf), "a%-8dz", 1234);
	EXPECT_STREQ("a1234 z", buf);

	snprintf(buf, sizeof(buf), "A%-11sZ", "abcdef");
	EXPECT_STREQ("Aabcdef Z", buf);

	snprintf(buf, sizeof(buf), "A%s:%dZ", "hello", 1234);
	EXPECT_STREQ("Ahello:1234Z", buf);

	snprintf(buf, sizeof(buf), "a%03d:%d:%02dz", 5, 5, 5);
	EXPECT_STREQ("a005:5:05z", buf);

	void* p = NULL;
	snprintf(buf, sizeof(buf), "a%d,%pz", 5, p);
	EXPECT_STREQ("a5,0x0z", buf);

	snprintf(buf, sizeof(buf), "a%lld,%d,%d,%dz", 0x1000000000LL, 6, 7, 8);
	EXPECT_STREQ("a68719476736,6,7,8z", buf);

	snprintf(buf, sizeof(buf), "a_%f_b", 1.23f);
	EXPECT_STREQ("a_1.230000_b", buf);

	snprintf(buf, sizeof(buf), "a_%g_b", 3.14);
	EXPECT_STREQ("a_3.14_b", buf);
	}

	TEST(stdio, snprintf_d_INT_MAX) {
	char buf[BUFSIZ];
	snprintf(buf, sizeof(buf), "%d", INT_MAX);
	EXPECT_STREQ("2147483647", buf);
	}

	TEST(stdio, snprintf_d_INT_MIN) {
	char buf[BUFSIZ];
	snprintf(buf, sizeof(buf), "%d", INT_MIN);
	EXPECT_STREQ("-2147483648", buf);
	}

	TEST(stdio, snprintf_ld_LONG_MAX) {
	char buf[BUFSIZ];
	snprintf(buf, sizeof(buf), "%ld", LONG_MAX);
	EXPECT_STREQ("2147483647", buf);
	}

	TEST(stdio, snprintf_ld_LONG_MIN) {
	char buf[BUFSIZ];
	snprintf(buf, sizeof(buf), "%ld", LONG_MIN);
	EXPECT_STREQ("-2147483648", buf);
	}

	TEST(stdio, snprintf_lld_LLONG_MAX) {
	char buf[BUFSIZ];
	snprintf(buf, sizeof(buf), "%lld", LLONG_MAX);
	EXPECT_STREQ("9223372036854775807", buf);
	}

	TEST(stdio, snprintf_lld_LLONG_MIN) {
	char buf[BUFSIZ];
	snprintf(buf, sizeof(buf), "%lld", LLONG_MIN);
	EXPECT_STREQ("-9223372036854775808", buf);
	}

	TEST(stdio, popen) {
	FILE* fp = popen("cat /proc/version", "r");
	ASSERT_TRUE(fp != NULL);

	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, getc) {
	FILE* fp = fopen("/proc/version", "r");
	ASSERT_TRUE(fp != NULL);
	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, putc) {
	FILE* fp = fopen("/proc/version", "r");
	ASSERT_TRUE(fp != NULL);
	ASSERT_EQ(EOF, putc('x', fp));
	fclose(fp);
	}