You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
166 lines
5.2 KiB
166 lines
5.2 KiB
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file. See the AUTHORS file for names of contributors.
|
|
|
|
#include <sys/wait.h>
|
|
#include <unistd.h>
|
|
|
|
#include "leveldb/env.h"
|
|
|
|
#include "port/port.h"
|
|
#include "util/testharness.h"
|
|
#include "util/env_posix_test_helper.h"
|
|
|
|
namespace leveldb {
|
|
|
|
static const int kDelayMicros = 100000;
|
|
static const int kReadOnlyFileLimit = 4;
|
|
static const int kMMapLimit = 4;
|
|
|
|
class EnvPosixTest {
|
|
public:
|
|
Env* env_;
|
|
EnvPosixTest() : env_(Env::Default()) { }
|
|
|
|
static void SetFileLimits(int read_only_file_limit, int mmap_limit) {
|
|
EnvPosixTestHelper::SetReadOnlyFDLimit(read_only_file_limit);
|
|
EnvPosixTestHelper::SetReadOnlyMMapLimit(mmap_limit);
|
|
}
|
|
};
|
|
|
|
TEST(EnvPosixTest, TestOpenOnRead) {
|
|
// Write some test data to a single file that will be opened |n| times.
|
|
std::string test_dir;
|
|
ASSERT_OK(env_->GetTestDirectory(&test_dir));
|
|
std::string test_file = test_dir + "/open_on_read.txt";
|
|
|
|
FILE* f = fopen(test_file.c_str(), "we");
|
|
ASSERT_TRUE(f != nullptr);
|
|
const char kFileData[] = "abcdefghijklmnopqrstuvwxyz";
|
|
fputs(kFileData, f);
|
|
fclose(f);
|
|
|
|
// Open test file some number above the sum of the two limits to force
|
|
// open-on-read behavior of POSIX Env leveldb::RandomAccessFile.
|
|
const int kNumFiles = kReadOnlyFileLimit + kMMapLimit + 5;
|
|
leveldb::RandomAccessFile* files[kNumFiles] = {0};
|
|
for (int i = 0; i < kNumFiles; i++) {
|
|
ASSERT_OK(env_->NewRandomAccessFile(test_file, &files[i]));
|
|
}
|
|
char scratch;
|
|
Slice read_result;
|
|
for (int i = 0; i < kNumFiles; i++) {
|
|
ASSERT_OK(files[i]->Read(i, 1, &read_result, &scratch));
|
|
ASSERT_EQ(kFileData[i], read_result[0]);
|
|
}
|
|
for (int i = 0; i < kNumFiles; i++) {
|
|
delete files[i];
|
|
}
|
|
ASSERT_OK(env_->DeleteFile(test_file));
|
|
}
|
|
|
|
#if defined(HAVE_O_CLOEXEC)
|
|
|
|
TEST(EnvPosixTest, TestCloseOnExec) {
|
|
// Test that file handles are not inherited by child processes.
|
|
|
|
// Open file handles with each of the open methods.
|
|
std::string test_dir;
|
|
ASSERT_OK(env_->GetTestDirectory(&test_dir));
|
|
std::vector<std::string> test_files = {
|
|
test_dir + "/close_on_exec_seq.txt",
|
|
test_dir + "/close_on_exec_rand.txt",
|
|
test_dir + "/close_on_exec_write.txt",
|
|
test_dir + "/close_on_exec_append.txt",
|
|
test_dir + "/close_on_exec_lock.txt",
|
|
test_dir + "/close_on_exec_log.txt",
|
|
};
|
|
for (const std::string& test_file : test_files) {
|
|
const char kFileData[] = "0123456789";
|
|
ASSERT_OK(WriteStringToFile(env_, kFileData, test_file));
|
|
}
|
|
leveldb::SequentialFile* seqFile = nullptr;
|
|
leveldb::RandomAccessFile* randFile = nullptr;
|
|
leveldb::WritableFile* writeFile = nullptr;
|
|
leveldb::WritableFile* appendFile = nullptr;
|
|
leveldb::FileLock* lockFile = nullptr;
|
|
leveldb::Logger* logFile = nullptr;
|
|
ASSERT_OK(env_->NewSequentialFile(test_files[0], &seqFile));
|
|
ASSERT_OK(env_->NewRandomAccessFile(test_files[1], &randFile));
|
|
ASSERT_OK(env_->NewWritableFile(test_files[2], &writeFile));
|
|
ASSERT_OK(env_->NewAppendableFile(test_files[3], &appendFile));
|
|
ASSERT_OK(env_->LockFile(test_files[4], &lockFile));
|
|
ASSERT_OK(env_->NewLogger(test_files[5], &logFile));
|
|
|
|
// Fork a child process and wait for it to complete.
|
|
int pid = fork();
|
|
if (pid == 0) {
|
|
const char* const child[] = {"/proc/self/exe", "-cloexec-child", nullptr};
|
|
execv(child[0], const_cast<char* const*>(child));
|
|
printf("Error spawning child process: %s\n", strerror(errno));
|
|
exit(6);
|
|
}
|
|
int status;
|
|
waitpid(pid, &status, 0);
|
|
ASSERT_EQ(0, WEXITSTATUS(status));
|
|
|
|
// cleanup
|
|
ASSERT_OK(env_->UnlockFile(lockFile));
|
|
delete seqFile;
|
|
delete randFile;
|
|
delete writeFile;
|
|
delete appendFile;
|
|
delete logFile;
|
|
for (const std::string& test_file : test_files) {
|
|
ASSERT_OK(env_->DeleteFile(test_file));
|
|
}
|
|
}
|
|
|
|
#endif // defined(HAVE_O_CLOEXEC)
|
|
|
|
int cloexecChild() {
|
|
// Checks for open file descriptors in the range 3..FD_SETSIZE.
|
|
for (int i = 3; i < FD_SETSIZE; i++) {
|
|
int dup_result = dup2(i, i);
|
|
if (dup_result != -1) {
|
|
printf("Unexpected open file %d\n", i);
|
|
char nbuf[28];
|
|
snprintf(nbuf, 28, "/proc/self/fd/%d", i);
|
|
char dbuf[1024];
|
|
int result = readlink(nbuf, dbuf, 1024);
|
|
if (0 < result && result < 1024) {
|
|
dbuf[result] = 0;
|
|
printf("File descriptor %d is %s\n", i, dbuf);
|
|
if (strstr(dbuf, "close_on_exec_") == nullptr) {
|
|
continue;
|
|
}
|
|
} else if (result >= 1024) {
|
|
printf("(file name length is too long)\n");
|
|
} else {
|
|
printf("Couldn't get file name: %s\n", strerror(errno));
|
|
}
|
|
return 3;
|
|
} else {
|
|
int e = errno;
|
|
if (e != EBADF) {
|
|
printf("Unexpected result reading file handle %d: %s\n", i,
|
|
strerror(errno));
|
|
return 4;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
} // namespace leveldb
|
|
|
|
int main(int argc, char** argv) {
|
|
// Check if this is the child process for TestCloseOnExec
|
|
if (argc > 1 && strcmp(argv[1], "-cloexec-child") == 0) {
|
|
return leveldb::cloexecChild();
|
|
}
|
|
// All tests currently run with the same read-only file limits.
|
|
leveldb::EnvPosixTest::SetFileLimits(leveldb::kReadOnlyFileLimit,
|
|
leveldb::kMMapLimit);
|
|
return leveldb::test::RunAllTests();
|
|
}
|