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31 #include "talk/base/gunit.h"
32 #include "talk/base/linuxfdwalk.h"
34 #include <sys/types.h>
39 static const int kArbitraryLargeFdNumber = 424;
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));
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);
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());
57 static void GetOpenFdList(std::set<int> *fds) {
59 EXPECT_EQ(0, fdwalk(&FdEnumVisitor, fds));
62 TEST(LinuxFdWalk, TestFdWalk) {
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) {
73 LOG(LS_INFO) << str.str();
75 int fd1 = open("/dev/null", O_RDONLY);
77 int fd2 = open("/dev/null", O_WRONLY);
79 int fd3 = open("/dev/null", O_RDWR);
81 int fd4 = dup2(fd3, kArbitraryLargeFdNumber);
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);
88 EXPECT_EQ(0, close(fd1));
89 EXPECT_EQ(0, close(fd2));
90 EXPECT_EQ(0, close(fd3));
91 EXPECT_EQ(0, close(fd4));