henrike@webrtc.org | 0e118e7 | 2013-07-10 00:45:36 +0000 | [diff] [blame] | 1 | /* |
| 2 | * libjingle |
| 3 | * Copyright 2009, Google Inc. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions are met: |
| 7 | * |
| 8 | * 1. Redistributions of source code must retain the above copyright notice, |
| 9 | * this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| 11 | * this list of conditions and the following disclaimer in the documentation |
| 12 | * and/or other materials provided with the distribution. |
| 13 | * 3. The name of the author may not be used to endorse or promote products |
| 14 | * derived from this software without specific prior written permission. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
| 19 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 20 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 21 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| 22 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 23 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| 24 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| 25 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 26 | */ |
| 27 | |
| 28 | #include <set> |
| 29 | #include <sstream> |
| 30 | |
| 31 | #include "talk/base/gunit.h" |
| 32 | #include "talk/base/linuxfdwalk.h" |
| 33 | |
| 34 | #include <sys/types.h> |
| 35 | #include <sys/stat.h> |
| 36 | #include <fcntl.h> |
| 37 | #include <unistd.h> |
| 38 | |
| 39 | static const int kArbitraryLargeFdNumber = 424; |
| 40 | |
| 41 | static void FdCheckVisitor(void *data, int fd) { |
| 42 | std::set<int> *fds = static_cast<std::set<int> *>(data); |
| 43 | EXPECT_EQ(1U, fds->erase(fd)); |
| 44 | } |
| 45 | |
| 46 | static void FdEnumVisitor(void *data, int fd) { |
| 47 | std::set<int> *fds = static_cast<std::set<int> *>(data); |
| 48 | EXPECT_TRUE(fds->insert(fd).second); |
| 49 | } |
| 50 | |
| 51 | // Checks that the set of open fds is exactly the given list. |
| 52 | static void CheckOpenFdList(std::set<int> fds) { |
| 53 | EXPECT_EQ(0, fdwalk(&FdCheckVisitor, &fds)); |
| 54 | EXPECT_EQ(0U, fds.size()); |
| 55 | } |
| 56 | |
| 57 | static void GetOpenFdList(std::set<int> *fds) { |
| 58 | fds->clear(); |
| 59 | EXPECT_EQ(0, fdwalk(&FdEnumVisitor, fds)); |
| 60 | } |
| 61 | |
| 62 | TEST(LinuxFdWalk, TestFdWalk) { |
| 63 | std::set<int> fds; |
| 64 | GetOpenFdList(&fds); |
| 65 | std::ostringstream str; |
| 66 | // I have observed that the open set when starting a test is [0, 6]. Leaked |
| 67 | // fds would change that, but so can (e.g.) running under a debugger, so we |
| 68 | // can't really do an EXPECT. :( |
| 69 | str << "File descriptors open in test executable:"; |
| 70 | for (std::set<int>::const_iterator i = fds.begin(); i != fds.end(); ++i) { |
| 71 | str << " " << *i; |
| 72 | } |
| 73 | LOG(LS_INFO) << str.str(); |
| 74 | // Open some files. |
| 75 | int fd1 = open("/dev/null", O_RDONLY); |
| 76 | EXPECT_LE(0, fd1); |
| 77 | int fd2 = open("/dev/null", O_WRONLY); |
| 78 | EXPECT_LE(0, fd2); |
| 79 | int fd3 = open("/dev/null", O_RDWR); |
| 80 | EXPECT_LE(0, fd3); |
| 81 | int fd4 = dup2(fd3, kArbitraryLargeFdNumber); |
| 82 | EXPECT_LE(0, fd4); |
| 83 | EXPECT_TRUE(fds.insert(fd1).second); |
| 84 | EXPECT_TRUE(fds.insert(fd2).second); |
| 85 | EXPECT_TRUE(fds.insert(fd3).second); |
| 86 | EXPECT_TRUE(fds.insert(fd4).second); |
| 87 | CheckOpenFdList(fds); |
| 88 | EXPECT_EQ(0, close(fd1)); |
| 89 | EXPECT_EQ(0, close(fd2)); |
| 90 | EXPECT_EQ(0, close(fd3)); |
| 91 | EXPECT_EQ(0, close(fd4)); |
| 92 | } |