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-rw-r--r--test/syscalls/linux/BUILD18
-rw-r--r--test/syscalls/linux/open.cc37
-rw-r--r--test/syscalls/linux/proc_net_tcp.cc281
-rw-r--r--test/syscalls/linux/proc_net_unix.cc5
-rw-r--r--test/syscalls/linux/stat.cc14
-rw-r--r--test/syscalls/linux/symlink.cc71
6 files changed, 419 insertions, 7 deletions
diff --git a/test/syscalls/linux/BUILD b/test/syscalls/linux/BUILD
index 0618fea58..8a24d8c0b 100644
--- a/test/syscalls/linux/BUILD
+++ b/test/syscalls/linux/BUILD
@@ -1177,6 +1177,7 @@ cc_binary(
"//test/util:temp_path",
"//test/util:test_main",
"//test/util:test_util",
+ "//test/util:thread_util",
"@com_google_absl//absl/strings",
"@com_google_googletest//:gtest",
],
@@ -2940,6 +2941,8 @@ cc_binary(
testonly = 1,
srcs = ["tcp_socket.cc"],
linkstatic = 1,
+ # FIXME(b/135470853)
+ tags = ["flaky"],
deps = [
":socket_test_util",
"//test/util:file_descriptor",
@@ -3340,3 +3343,18 @@ cc_binary(
"@com_google_googletest//:gtest",
],
)
+
+cc_binary(
+ name = "proc_net_tcp_test",
+ testonly = 1,
+ srcs = ["proc_net_tcp.cc"],
+ linkstatic = 1,
+ deps = [
+ ":ip_socket_test_util",
+ "//test/util:file_descriptor",
+ "//test/util:test_main",
+ "//test/util:test_util",
+ "@com_google_absl//absl/strings",
+ "@com_google_googletest//:gtest",
+ ],
+)
diff --git a/test/syscalls/linux/open.cc b/test/syscalls/linux/open.cc
index 42646bb02..e0525f386 100644
--- a/test/syscalls/linux/open.cc
+++ b/test/syscalls/linux/open.cc
@@ -28,6 +28,7 @@
#include "test/util/fs_util.h"
#include "test/util/temp_path.h"
#include "test/util/test_util.h"
+#include "test/util/thread_util.h"
namespace gvisor {
namespace testing {
@@ -214,6 +215,42 @@ TEST_F(OpenTest, AppendOnly) {
SyscallSucceedsWithValue(kBufSize * 3));
}
+TEST_F(OpenTest, AppendConcurrentWrite) {
+ constexpr int kThreadCount = 5;
+ constexpr int kBytesPerThread = 10000;
+ std::unique_ptr<ScopedThread> threads[kThreadCount];
+
+ // In case of the uncached policy, we expect that a file system can be changed
+ // externally, so we create a new inode each time when we open a file and we
+ // can't guarantee that writes to files with O_APPEND will work correctly.
+ SKIP_IF(getenv("GVISOR_GOFER_UNCACHED"));
+
+ EXPECT_THAT(truncate(test_file_name_.c_str(), 0), SyscallSucceeds());
+
+ std::string filename = test_file_name_;
+ DisableSave ds; // Too many syscalls.
+ // Start kThreadCount threads which will write concurrently into the same
+ // file.
+ for (int i = 0; i < kThreadCount; i++) {
+ threads[i] = absl::make_unique<ScopedThread>([filename]() {
+ const FileDescriptor fd =
+ ASSERT_NO_ERRNO_AND_VALUE(Open(filename, O_RDWR | O_APPEND));
+
+ for (int j = 0; j < kBytesPerThread; j++) {
+ EXPECT_THAT(WriteFd(fd.get(), &j, 1), SyscallSucceedsWithValue(1));
+ }
+ });
+ }
+ for (int i = 0; i < kThreadCount; i++) {
+ threads[i]->Join();
+ }
+
+ // Check that the size of the file is correct.
+ struct stat st;
+ EXPECT_THAT(stat(test_file_name_.c_str(), &st), SyscallSucceeds());
+ EXPECT_EQ(st.st_size, kThreadCount * kBytesPerThread);
+}
+
TEST_F(OpenTest, Truncate) {
{
// First write some data to the new file and close it.
diff --git a/test/syscalls/linux/proc_net_tcp.cc b/test/syscalls/linux/proc_net_tcp.cc
new file mode 100644
index 000000000..578b20680
--- /dev/null
+++ b/test/syscalls/linux/proc_net_tcp.cc
@@ -0,0 +1,281 @@
+// Copyright 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "gtest/gtest.h"
+#include "gtest/gtest.h"
+#include "absl/strings/numbers.h"
+#include "absl/strings/str_join.h"
+#include "absl/strings/str_split.h"
+#include "test/syscalls/linux/ip_socket_test_util.h"
+#include "test/util/file_descriptor.h"
+#include "test/util/test_util.h"
+
+namespace gvisor {
+namespace testing {
+namespace {
+
+using absl::StrCat;
+using absl::StrSplit;
+
+constexpr char kProcNetTCPHeader[] =
+ " sl local_address rem_address st tx_queue rx_queue tr tm->when "
+ "retrnsmt uid timeout inode "
+ " ";
+
+// Possible values of the "st" field in a /proc/net/tcp entry. Source: Linux
+// kernel, include/net/tcp_states.h.
+enum {
+ TCP_ESTABLISHED = 1,
+ TCP_SYN_SENT,
+ TCP_SYN_RECV,
+ TCP_FIN_WAIT1,
+ TCP_FIN_WAIT2,
+ TCP_TIME_WAIT,
+ TCP_CLOSE,
+ TCP_CLOSE_WAIT,
+ TCP_LAST_ACK,
+ TCP_LISTEN,
+ TCP_CLOSING,
+ TCP_NEW_SYN_RECV,
+
+ TCP_MAX_STATES
+};
+
+// TCPEntry represents a single entry from /proc/net/tcp.
+struct TCPEntry {
+ uint32_t local_addr;
+ uint16_t local_port;
+
+ uint32_t remote_addr;
+ uint16_t remote_port;
+
+ uint64_t state;
+ uint64_t uid;
+ uint64_t inode;
+};
+
+uint32_t IP(const struct sockaddr* addr) {
+ auto* in_addr = reinterpret_cast<const struct sockaddr_in*>(addr);
+ return in_addr->sin_addr.s_addr;
+}
+
+uint16_t Port(const struct sockaddr* addr) {
+ auto* in_addr = reinterpret_cast<const struct sockaddr_in*>(addr);
+ return ntohs(in_addr->sin_port);
+}
+
+// Finds the first entry in 'entries' for which 'predicate' returns true.
+// Returns true on match, and sets 'match' to point to the matching entry.
+bool FindBy(std::vector<TCPEntry> entries, TCPEntry* match,
+ std::function<bool(const TCPEntry&)> predicate) {
+ for (int i = 0; i < entries.size(); ++i) {
+ if (predicate(entries[i])) {
+ *match = entries[i];
+ return true;
+ }
+ }
+ return false;
+}
+
+bool FindByLocalAddr(std::vector<TCPEntry> entries, TCPEntry* match,
+ const struct sockaddr* addr) {
+ uint32_t host = IP(addr);
+ uint16_t port = Port(addr);
+ return FindBy(entries, match, [host, port](const TCPEntry& e) {
+ return (e.local_addr == host && e.local_port == port);
+ });
+}
+
+bool FindByRemoteAddr(std::vector<TCPEntry> entries, TCPEntry* match,
+ const struct sockaddr* addr) {
+ uint32_t host = IP(addr);
+ uint16_t port = Port(addr);
+ return FindBy(entries, match, [host, port](const TCPEntry& e) {
+ return (e.remote_addr == host && e.remote_port == port);
+ });
+}
+
+// Returns a parsed representation of /proc/net/tcp entries.
+PosixErrorOr<std::vector<TCPEntry>> ProcNetTCPEntries() {
+ std::string content;
+ RETURN_IF_ERRNO(GetContents("/proc/net/tcp", &content));
+
+ bool found_header = false;
+ std::vector<TCPEntry> entries;
+ std::vector<std::string> lines = StrSplit(content, '\n');
+ std::cerr << "<contents of /proc/net/tcp>" << std::endl;
+ for (std::string line : lines) {
+ std::cerr << line << std::endl;
+
+ if (!found_header) {
+ EXPECT_EQ(line, kProcNetTCPHeader);
+ found_header = true;
+ continue;
+ }
+ if (line.empty()) {
+ continue;
+ }
+
+ // Parse a single entry from /proc/net/tcp.
+ //
+ // Example entries:
+ //
+ // clang-format off
+ //
+ // sl local_address rem_address st tx_queue rx_queue tr tm->when retrnsmt uid timeout inode
+ // 0: 00000000:006F 00000000:0000 0A 00000000:00000000 00:00000000 00000000 0 0 1968 1 0000000000000000 100 0 0 10 0
+ // 1: 0100007F:7533 00000000:0000 0A 00000000:00000000 00:00000000 00000000 120 0 10684 1 0000000000000000 100 0 0 10 0
+ // ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^
+ // 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
+ //
+ // clang-format on
+
+ TCPEntry entry;
+ std::vector<std::string> fields =
+ StrSplit(line, absl::ByAnyChar(": "), absl::SkipEmpty());
+
+ ASSIGN_OR_RETURN_ERRNO(entry.local_addr, AtoiBase(fields[1], 16));
+ ASSIGN_OR_RETURN_ERRNO(entry.local_port, AtoiBase(fields[2], 16));
+
+ ASSIGN_OR_RETURN_ERRNO(entry.remote_addr, AtoiBase(fields[3], 16));
+ ASSIGN_OR_RETURN_ERRNO(entry.remote_port, AtoiBase(fields[4], 16));
+
+ ASSIGN_OR_RETURN_ERRNO(entry.state, AtoiBase(fields[5], 16));
+ ASSIGN_OR_RETURN_ERRNO(entry.uid, Atoi<uint64_t>(fields[11]));
+ ASSIGN_OR_RETURN_ERRNO(entry.inode, Atoi<uint64_t>(fields[13]));
+
+ entries.push_back(entry);
+ }
+ std::cerr << "<end of /proc/net/tcp>" << std::endl;
+
+ return entries;
+}
+
+TEST(ProcNetTCP, Exists) {
+ const std::string content =
+ ASSERT_NO_ERRNO_AND_VALUE(GetContents("/proc/net/tcp"));
+ const std::string header_line = StrCat(kProcNetTCPHeader, "\n");
+ if (IsRunningOnGvisor()) {
+ // Should be just the header since we don't have any tcp sockets yet.
+ EXPECT_EQ(content, header_line);
+ } else {
+ // On a general linux machine, we could have abitrary sockets on the system,
+ // so just check the header.
+ EXPECT_THAT(content, ::testing::StartsWith(header_line));
+ }
+}
+
+TEST(ProcNetTCP, EntryUID) {
+ auto sockets =
+ ASSERT_NO_ERRNO_AND_VALUE(IPv4TCPAcceptBindSocketPair(0).Create());
+ std::vector<TCPEntry> entries =
+ ASSERT_NO_ERRNO_AND_VALUE(ProcNetTCPEntries());
+ TCPEntry e;
+ EXPECT_TRUE(FindByLocalAddr(entries, &e, sockets->first_addr()));
+ EXPECT_EQ(e.uid, geteuid());
+ EXPECT_TRUE(FindByRemoteAddr(entries, &e, sockets->first_addr()));
+ EXPECT_EQ(e.uid, geteuid());
+}
+
+TEST(ProcNetTCP, BindAcceptConnect) {
+ auto sockets =
+ ASSERT_NO_ERRNO_AND_VALUE(IPv4TCPAcceptBindSocketPair(0).Create());
+ std::vector<TCPEntry> entries =
+ ASSERT_NO_ERRNO_AND_VALUE(ProcNetTCPEntries());
+ // We can only make assertions about the total number of entries if we control
+ // the entire "machine".
+ if (IsRunningOnGvisor()) {
+ EXPECT_EQ(entries.size(), 2);
+ }
+
+ TCPEntry e;
+ EXPECT_TRUE(FindByLocalAddr(entries, &e, sockets->first_addr()));
+ EXPECT_TRUE(FindByRemoteAddr(entries, &e, sockets->first_addr()));
+}
+
+TEST(ProcNetTCP, InodeReasonable) {
+ auto sockets =
+ ASSERT_NO_ERRNO_AND_VALUE(IPv4TCPAcceptBindSocketPair(0).Create());
+ std::vector<TCPEntry> entries =
+ ASSERT_NO_ERRNO_AND_VALUE(ProcNetTCPEntries());
+
+ TCPEntry accepted_entry;
+ ASSERT_TRUE(FindByLocalAddr(entries, &accepted_entry, sockets->first_addr()));
+ EXPECT_NE(accepted_entry.inode, 0);
+
+ TCPEntry client_entry;
+ ASSERT_TRUE(FindByRemoteAddr(entries, &client_entry, sockets->first_addr()));
+ EXPECT_NE(client_entry.inode, 0);
+ EXPECT_NE(accepted_entry.inode, client_entry.inode);
+}
+
+TEST(ProcNetTCP, State) {
+ std::unique_ptr<FileDescriptor> server =
+ ASSERT_NO_ERRNO_AND_VALUE(IPv4TCPUnboundSocket(0).Create());
+
+ auto test_addr = V4Loopback();
+ ASSERT_THAT(
+ bind(server->get(), reinterpret_cast<struct sockaddr*>(&test_addr.addr),
+ test_addr.addr_len),
+ SyscallSucceeds());
+
+ struct sockaddr addr;
+ socklen_t addrlen = sizeof(struct sockaddr);
+ ASSERT_THAT(getsockname(server->get(), &addr, &addrlen), SyscallSucceeds());
+ ASSERT_EQ(addrlen, sizeof(struct sockaddr));
+
+ ASSERT_THAT(listen(server->get(), 10), SyscallSucceeds());
+ std::vector<TCPEntry> entries =
+ ASSERT_NO_ERRNO_AND_VALUE(ProcNetTCPEntries());
+ TCPEntry listen_entry;
+ ASSERT_TRUE(FindByLocalAddr(entries, &listen_entry, &addr));
+ EXPECT_EQ(listen_entry.state, TCP_LISTEN);
+
+ std::unique_ptr<FileDescriptor> client =
+ ASSERT_NO_ERRNO_AND_VALUE(IPv4TCPUnboundSocket(0).Create());
+ ASSERT_THAT(connect(client->get(), &addr, addrlen), SyscallSucceeds());
+ entries = ASSERT_NO_ERRNO_AND_VALUE(ProcNetTCPEntries());
+ ASSERT_TRUE(FindByLocalAddr(entries, &listen_entry, &addr));
+ EXPECT_EQ(listen_entry.state, TCP_LISTEN);
+ TCPEntry client_entry;
+ ASSERT_TRUE(FindByRemoteAddr(entries, &client_entry, &addr));
+ EXPECT_EQ(client_entry.state, TCP_ESTABLISHED);
+
+ FileDescriptor accepted =
+ ASSERT_NO_ERRNO_AND_VALUE(Accept(server->get(), nullptr, nullptr));
+
+ const uint32_t accepted_local_host = IP(&addr);
+ const uint16_t accepted_local_port = Port(&addr);
+
+ entries = ASSERT_NO_ERRNO_AND_VALUE(ProcNetTCPEntries());
+ TCPEntry accepted_entry;
+ ASSERT_TRUE(FindBy(entries, &accepted_entry,
+ [client_entry, accepted_local_host,
+ accepted_local_port](const TCPEntry& e) {
+ return e.local_addr == accepted_local_host &&
+ e.local_port == accepted_local_port &&
+ e.remote_addr == client_entry.local_addr &&
+ e.remote_port == client_entry.local_port;
+ }));
+ EXPECT_EQ(accepted_entry.state, TCP_ESTABLISHED);
+}
+
+} // namespace
+} // namespace testing
+} // namespace gvisor
diff --git a/test/syscalls/linux/proc_net_unix.cc b/test/syscalls/linux/proc_net_unix.cc
index 82d325c17..74acbe92c 100644
--- a/test/syscalls/linux/proc_net_unix.cc
+++ b/test/syscalls/linux/proc_net_unix.cc
@@ -162,7 +162,7 @@ PosixErrorOr<std::vector<UnixEntry>> ProcNetUnixEntries() {
// Finds the first entry in 'entries' for which 'predicate' returns true.
// Returns true on match, and sets 'match' to point to the matching entry.
bool FindBy(std::vector<UnixEntry> entries, UnixEntry* match,
- std::function<bool(UnixEntry)> predicate) {
+ std::function<bool(const UnixEntry&)> predicate) {
for (int i = 0; i < entries.size(); ++i) {
if (predicate(entries[i])) {
*match = entries[i];
@@ -174,7 +174,8 @@ bool FindBy(std::vector<UnixEntry> entries, UnixEntry* match,
bool FindByPath(std::vector<UnixEntry> entries, UnixEntry* match,
const std::string& path) {
- return FindBy(entries, match, [path](UnixEntry e) { return e.path == path; });
+ return FindBy(entries, match,
+ [path](const UnixEntry& e) { return e.path == path; });
}
TEST(ProcNetUnix, Exists) {
diff --git a/test/syscalls/linux/stat.cc b/test/syscalls/linux/stat.cc
index 0e914215d..510f7bee5 100644
--- a/test/syscalls/linux/stat.cc
+++ b/test/syscalls/linux/stat.cc
@@ -558,7 +558,7 @@ TEST(SimpleStatTest, AnonDeviceAllocatesUniqueInodesAcrossSaveRestore) {
#ifndef SYS_statx
#if defined(__x86_64__)
-#define SYS_statx 397
+#define SYS_statx 332
#else
#error "Unknown architecture"
#endif
@@ -607,7 +607,8 @@ int statx(int dirfd, const char *pathname, int flags, unsigned int mask,
}
TEST_F(StatTest, StatxAbsPath) {
- SKIP_IF(statx(-1, nullptr, 0, 0, 0) < 0 && errno == ENOSYS);
+ SKIP_IF(!IsRunningOnGvisor() && statx(-1, nullptr, 0, 0, 0) < 0 &&
+ errno == ENOSYS);
struct kernel_statx stx;
EXPECT_THAT(statx(-1, test_file_name_.c_str(), 0, STATX_ALL, &stx),
@@ -616,7 +617,8 @@ TEST_F(StatTest, StatxAbsPath) {
}
TEST_F(StatTest, StatxRelPathDirFD) {
- SKIP_IF(statx(-1, nullptr, 0, 0, 0) < 0 && errno == ENOSYS);
+ SKIP_IF(!IsRunningOnGvisor() && statx(-1, nullptr, 0, 0, 0) < 0 &&
+ errno == ENOSYS);
struct kernel_statx stx;
auto const dirfd =
@@ -629,7 +631,8 @@ TEST_F(StatTest, StatxRelPathDirFD) {
}
TEST_F(StatTest, StatxRelPathCwd) {
- SKIP_IF(statx(-1, nullptr, 0, 0, 0) < 0 && errno == ENOSYS);
+ SKIP_IF(!IsRunningOnGvisor() && statx(-1, nullptr, 0, 0, 0) < 0 &&
+ errno == ENOSYS);
ASSERT_THAT(chdir(GetAbsoluteTestTmpdir().c_str()), SyscallSucceeds());
auto filename = std::string(Basename(test_file_name_));
@@ -640,7 +643,8 @@ TEST_F(StatTest, StatxRelPathCwd) {
}
TEST_F(StatTest, StatxEmptyPath) {
- SKIP_IF(statx(-1, nullptr, 0, 0, 0) < 0 && errno == ENOSYS);
+ SKIP_IF(!IsRunningOnGvisor() && statx(-1, nullptr, 0, 0, 0) < 0 &&
+ errno == ENOSYS);
const auto fd = ASSERT_NO_ERRNO_AND_VALUE(Open(test_file_name_, O_RDONLY));
struct kernel_statx stx;
diff --git a/test/syscalls/linux/symlink.cc b/test/syscalls/linux/symlink.cc
index 494072a9b..dce8de9ec 100644
--- a/test/syscalls/linux/symlink.cc
+++ b/test/syscalls/linux/symlink.cc
@@ -272,6 +272,77 @@ TEST(SymlinkTest, ChmodSymlink) {
EXPECT_EQ(FilePermission(newpath), 0777);
}
+class ParamSymlinkTest : public ::testing::TestWithParam<std::string> {};
+
+// Test that creating an existing symlink with creat will create the target.
+TEST_P(ParamSymlinkTest, CreatLinkCreatesTarget) {
+ const std::string target = GetParam();
+ const std::string linkpath = NewTempAbsPath();
+
+ ASSERT_THAT(symlink(target.c_str(), linkpath.c_str()), SyscallSucceeds());
+
+ int fd;
+ EXPECT_THAT(fd = creat(linkpath.c_str(), 0666), SyscallSucceeds());
+ ASSERT_THAT(close(fd), SyscallSucceeds());
+
+ ASSERT_THAT(chdir(GetAbsoluteTestTmpdir().c_str()), SyscallSucceeds());
+ struct stat st;
+ EXPECT_THAT(stat(target.c_str(), &st), SyscallSucceeds());
+
+ ASSERT_THAT(unlink(linkpath.c_str()), SyscallSucceeds());
+ ASSERT_THAT(unlink(target.c_str()), SyscallSucceeds());
+}
+
+// Test that opening an existing symlink with O_CREAT will create the target.
+TEST_P(ParamSymlinkTest, OpenLinkCreatesTarget) {
+ const std::string target = GetParam();
+ const std::string linkpath = NewTempAbsPath();
+
+ ASSERT_THAT(symlink(target.c_str(), linkpath.c_str()), SyscallSucceeds());
+
+ int fd;
+ EXPECT_THAT(fd = open(linkpath.c_str(), O_CREAT, 0666), SyscallSucceeds());
+ ASSERT_THAT(close(fd), SyscallSucceeds());
+
+ ASSERT_THAT(chdir(GetAbsoluteTestTmpdir().c_str()), SyscallSucceeds());
+ struct stat st;
+ EXPECT_THAT(stat(target.c_str(), &st), SyscallSucceeds());
+
+ ASSERT_THAT(unlink(linkpath.c_str()), SyscallSucceeds());
+ ASSERT_THAT(unlink(target.c_str()), SyscallSucceeds());
+}
+
+// Test that opening an existing symlink with O_CREAT|O_EXCL will fail with
+// EEXIST.
+TEST_P(ParamSymlinkTest, OpenLinkExclFails) {
+ const std::string target = GetParam();
+ const std::string linkpath = NewTempAbsPath();
+
+ ASSERT_THAT(symlink(target.c_str(), linkpath.c_str()), SyscallSucceeds());
+
+ EXPECT_THAT(open(linkpath.c_str(), O_CREAT | O_EXCL, 0666),
+ SyscallFailsWithErrno(EEXIST));
+
+ ASSERT_THAT(unlink(linkpath.c_str()), SyscallSucceeds());
+}
+
+// Test that opening an existing symlink with O_CREAT|O_NOFOLLOW will fail with
+// ELOOP.
+TEST_P(ParamSymlinkTest, OpenLinkNoFollowFails) {
+ const std::string target = GetParam();
+ const std::string linkpath = NewTempAbsPath();
+
+ ASSERT_THAT(symlink(target.c_str(), linkpath.c_str()), SyscallSucceeds());
+
+ EXPECT_THAT(open(linkpath.c_str(), O_CREAT | O_NOFOLLOW, 0666),
+ SyscallFailsWithErrno(ELOOP));
+
+ ASSERT_THAT(unlink(linkpath.c_str()), SyscallSucceeds());
+}
+
+INSTANTIATE_TEST_SUITE_P(AbsAndRelTarget, ParamSymlinkTest,
+ ::testing::Values(NewTempAbsPath(), NewTempRelPath()));
+
} // namespace
} // namespace testing
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-07 03:26:49 +0000