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