blob: bba48e8878fb0b3b2e996ef00705bce983156819 [file] [log] [blame]
* Copyright 2009 The WebRTC Project Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
#include <set>
#include <sstream>
#include "webrtc/base/gunit.h"
#include "webrtc/base/linuxfdwalk.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
static const int kArbitraryLargeFdNumber = 424;
static void FdCheckVisitor(void *data, int fd) {
std::set<int> *fds = static_cast<std::set<int> *>(data);
EXPECT_EQ(1U, fds->erase(fd));
static void FdEnumVisitor(void *data, int fd) {
std::set<int> *fds = static_cast<std::set<int> *>(data);
// Checks that the set of open fds is exactly the given list.
static void CheckOpenFdList(std::set<int> fds) {
EXPECT_EQ(0, fdwalk(&FdCheckVisitor, &fds));
EXPECT_EQ(0U, fds.size());
static void GetOpenFdList(std::set<int> *fds) {
EXPECT_EQ(0, fdwalk(&FdEnumVisitor, fds));
TEST(LinuxFdWalk, TestFdWalk) {
std::set<int> fds;
std::ostringstream str;
// I have observed that the open set when starting a test is [0, 6]. Leaked
// fds would change that, but so can (e.g.) running under a debugger, so we
// can't really do an EXPECT. :(
str << "File descriptors open in test executable:";
for (std::set<int>::const_iterator i = fds.begin(); i != fds.end(); ++i) {
str << " " << *i;
LOG(LS_INFO) << str.str();
// Open some files.
int fd1 = open("/dev/null", O_RDONLY);
EXPECT_LE(0, fd1);
int fd2 = open("/dev/null", O_WRONLY);
EXPECT_LE(0, fd2);
int fd3 = open("/dev/null", O_RDWR);
EXPECT_LE(0, fd3);
int fd4 = dup2(fd3, kArbitraryLargeFdNumber);
EXPECT_LE(0, fd4);
EXPECT_EQ(0, close(fd1));
EXPECT_EQ(0, close(fd2));
EXPECT_EQ(0, close(fd3));
EXPECT_EQ(0, close(fd4));