diff options
Diffstat (limited to '')
-rw-r--r-- | dependencies/pkg/mod/golang.org/x/sys@v0.1.0/unix/syscall_unix_test.go | 1069 |
1 files changed, 1069 insertions, 0 deletions
diff --git a/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/unix/syscall_unix_test.go b/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/unix/syscall_unix_test.go new file mode 100644 index 0000000..afe2dc7 --- /dev/null +++ b/dependencies/pkg/mod/golang.org/x/sys@v0.1.0/unix/syscall_unix_test.go @@ -0,0 +1,1069 @@ +// Copyright 2013 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris +// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris + +package unix_test + +import ( + "bytes" + "flag" + "fmt" + "io/ioutil" + "net" + "os" + "os/exec" + "path/filepath" + "reflect" + "runtime" + "strconv" + "sync" + "syscall" + "testing" + "time" + + "golang.org/x/sys/unix" +) + +// Tests that below functions, structures and constants are consistent +// on all Unix-like systems. +func _() { + // program scheduling priority functions and constants + var ( + _ func(int, int, int) error = unix.Setpriority + _ func(int, int) (int, error) = unix.Getpriority + ) + const ( + _ int = unix.PRIO_USER + _ int = unix.PRIO_PROCESS + _ int = unix.PRIO_PGRP + ) + + // termios constants + const ( + _ int = unix.TCIFLUSH + _ int = unix.TCIOFLUSH + _ int = unix.TCOFLUSH + ) + + // fcntl file locking structure and constants + var ( + _ = unix.Flock_t{ + Type: int16(0), + Whence: int16(0), + Start: int64(0), + Len: int64(0), + Pid: int32(0), + } + ) + const ( + _ = unix.F_GETLK + _ = unix.F_SETLK + _ = unix.F_SETLKW + ) +} + +func TestErrnoSignalName(t *testing.T) { + testErrors := []struct { + num syscall.Errno + name string + }{ + {syscall.EPERM, "EPERM"}, + {syscall.EINVAL, "EINVAL"}, + {syscall.ENOENT, "ENOENT"}, + } + + for _, te := range testErrors { + t.Run(fmt.Sprintf("%d/%s", te.num, te.name), func(t *testing.T) { + e := unix.ErrnoName(te.num) + if e != te.name { + t.Errorf("ErrnoName(%d) returned %s, want %s", te.num, e, te.name) + } + }) + } + + testSignals := []struct { + num syscall.Signal + name string + }{ + {syscall.SIGHUP, "SIGHUP"}, + {syscall.SIGPIPE, "SIGPIPE"}, + {syscall.SIGSEGV, "SIGSEGV"}, + } + + for _, ts := range testSignals { + t.Run(fmt.Sprintf("%d/%s", ts.num, ts.name), func(t *testing.T) { + s := unix.SignalName(ts.num) + if s != ts.name { + t.Errorf("SignalName(%d) returned %s, want %s", ts.num, s, ts.name) + } + }) + } +} + +func TestSignalNum(t *testing.T) { + testSignals := []struct { + name string + want syscall.Signal + }{ + {"SIGHUP", syscall.SIGHUP}, + {"SIGPIPE", syscall.SIGPIPE}, + {"SIGSEGV", syscall.SIGSEGV}, + {"NONEXISTS", 0}, + } + for _, ts := range testSignals { + t.Run(fmt.Sprintf("%s/%d", ts.name, ts.want), func(t *testing.T) { + got := unix.SignalNum(ts.name) + if got != ts.want { + t.Errorf("SignalNum(%s) returned %d, want %d", ts.name, got, ts.want) + } + }) + + } +} + +func TestFcntlInt(t *testing.T) { + t.Parallel() + file, err := ioutil.TempFile("", "TestFcntlInt") + if err != nil { + t.Fatal(err) + } + defer os.Remove(file.Name()) + defer file.Close() + f := file.Fd() + flags, err := unix.FcntlInt(f, unix.F_GETFD, 0) + if err != nil { + t.Fatal(err) + } + if flags&unix.FD_CLOEXEC == 0 { + t.Errorf("flags %#x do not include FD_CLOEXEC", flags) + } +} + +// TestFcntlFlock tests whether the file locking structure matches +// the calling convention of each kernel. +func TestFcntlFlock(t *testing.T) { + name := filepath.Join(os.TempDir(), "TestFcntlFlock") + fd, err := unix.Open(name, unix.O_CREAT|unix.O_RDWR|unix.O_CLOEXEC, 0) + if err != nil { + t.Fatalf("Open failed: %v", err) + } + defer unix.Unlink(name) + defer unix.Close(fd) + flock := unix.Flock_t{ + Type: unix.F_RDLCK, + Start: 0, Len: 0, Whence: 1, + } + if err := unix.FcntlFlock(uintptr(fd), unix.F_GETLK, &flock); err != nil { + t.Fatalf("FcntlFlock failed: %v", err) + } +} + +// TestPassFD tests passing a file descriptor over a Unix socket. +// +// This test involved both a parent and child process. The parent +// process is invoked as a normal test, with "go test", which then +// runs the child process by running the current test binary with args +// "-test.run=^TestPassFD$" and an environment variable used to signal +// that the test should become the child process instead. +func TestPassFD(t *testing.T) { + if runtime.GOOS == "ios" { + t.Skip("cannot exec subprocess on iOS, skipping test") + } + + if os.Getenv("GO_WANT_HELPER_PROCESS") == "1" { + passFDChild() + return + } + + if runtime.GOOS == "aix" { + // Unix network isn't properly working on AIX + // 7.2 with Technical Level < 2 + out, err := exec.Command("oslevel", "-s").Output() + if err != nil { + t.Skipf("skipping on AIX because oslevel -s failed: %v", err) + } + + if len(out) < len("7200-XX-ZZ-YYMM") { // AIX 7.2, Tech Level XX, Service Pack ZZ, date YYMM + t.Skip("skipping on AIX because oslevel -s hasn't the right length") + } + aixVer := string(out[:4]) + tl, err := strconv.Atoi(string(out[5:7])) + if err != nil { + t.Skipf("skipping on AIX because oslevel -s output cannot be parsed: %v", err) + } + if aixVer < "7200" || (aixVer == "7200" && tl < 2) { + t.Skip("skipped on AIX versions previous to 7.2 TL 2") + } + } + + tempDir, err := ioutil.TempDir("", "TestPassFD") + if err != nil { + t.Fatal(err) + } + defer os.RemoveAll(tempDir) + + fds, err := unix.Socketpair(unix.AF_LOCAL, unix.SOCK_STREAM, 0) + if err != nil { + t.Fatalf("Socketpair: %v", err) + } + writeFile := os.NewFile(uintptr(fds[0]), "child-writes") + readFile := os.NewFile(uintptr(fds[1]), "parent-reads") + defer writeFile.Close() + defer readFile.Close() + + cmd := exec.Command(os.Args[0], "-test.run=^TestPassFD$", "--", tempDir) + cmd.Env = []string{"GO_WANT_HELPER_PROCESS=1"} + if lp := os.Getenv("LD_LIBRARY_PATH"); lp != "" { + cmd.Env = append(cmd.Env, "LD_LIBRARY_PATH="+lp) + } + cmd.ExtraFiles = []*os.File{writeFile} + + out, err := cmd.CombinedOutput() + if len(out) > 0 || err != nil { + t.Fatalf("child process: %q, %v", out, err) + } + + c, err := net.FileConn(readFile) + if err != nil { + t.Fatalf("FileConn: %v", err) + } + defer c.Close() + + uc, ok := c.(*net.UnixConn) + if !ok { + t.Fatalf("unexpected FileConn type; expected UnixConn, got %T", c) + } + + buf := make([]byte, 32) // expect 1 byte + oob := make([]byte, 32) // expect 24 bytes + closeUnix := time.AfterFunc(5*time.Second, func() { + t.Logf("timeout reading from unix socket") + uc.Close() + }) + _, oobn, _, _, err := uc.ReadMsgUnix(buf, oob) + if err != nil { + t.Fatalf("ReadMsgUnix: %v", err) + } + closeUnix.Stop() + + scms, err := unix.ParseSocketControlMessage(oob[:oobn]) + if err != nil { + t.Fatalf("ParseSocketControlMessage: %v", err) + } + if len(scms) != 1 { + t.Fatalf("expected 1 SocketControlMessage; got scms = %#v", scms) + } + scm := scms[0] + gotFds, err := unix.ParseUnixRights(&scm) + if err != nil { + t.Fatalf("unix.ParseUnixRights: %v", err) + } + if len(gotFds) != 1 { + t.Fatalf("wanted 1 fd; got %#v", gotFds) + } + + f := os.NewFile(uintptr(gotFds[0]), "fd-from-child") + defer f.Close() + + got, err := ioutil.ReadAll(f) + want := "Hello from child process!\n" + if string(got) != want { + t.Errorf("child process ReadAll: %q, %v; want %q", got, err, want) + } +} + +// passFDChild is the child process used by TestPassFD. +func passFDChild() { + defer os.Exit(0) + + // Look for our fd. It should be fd 3, but we work around an fd leak + // bug here (http://golang.org/issue/2603) to let it be elsewhere. + var uc *net.UnixConn + for fd := uintptr(3); fd <= 10; fd++ { + f := os.NewFile(fd, "unix-conn") + var ok bool + netc, _ := net.FileConn(f) + uc, ok = netc.(*net.UnixConn) + if ok { + break + } + } + if uc == nil { + fmt.Println("failed to find unix fd") + return + } + + // Make a file f to send to our parent process on uc. + // We make it in tempDir, which our parent will clean up. + flag.Parse() + tempDir := flag.Arg(0) + f, err := ioutil.TempFile(tempDir, "") + if err != nil { + fmt.Printf("TempFile: %v", err) + return + } + + f.Write([]byte("Hello from child process!\n")) + f.Seek(0, 0) + + rights := unix.UnixRights(int(f.Fd())) + dummyByte := []byte("x") + n, oobn, err := uc.WriteMsgUnix(dummyByte, rights, nil) + if err != nil { + fmt.Printf("WriteMsgUnix: %v", err) + return + } + if n != 1 || oobn != len(rights) { + fmt.Printf("WriteMsgUnix = %d, %d; want 1, %d", n, oobn, len(rights)) + return + } +} + +// TestUnixRightsRoundtrip tests that UnixRights, ParseSocketControlMessage, +// and ParseUnixRights are able to successfully round-trip lists of file descriptors. +func TestUnixRightsRoundtrip(t *testing.T) { + testCases := [...][][]int{ + {{42}}, + {{1, 2}}, + {{3, 4, 5}}, + {{}}, + {{1, 2}, {3, 4, 5}, {}, {7}}, + } + for _, testCase := range testCases { + b := []byte{} + var n int + for _, fds := range testCase { + // Last assignment to n wins + n = len(b) + unix.CmsgLen(4*len(fds)) + b = append(b, unix.UnixRights(fds...)...) + } + // Truncate b + b = b[:n] + + scms, err := unix.ParseSocketControlMessage(b) + if err != nil { + t.Fatalf("ParseSocketControlMessage: %v", err) + } + if len(scms) != len(testCase) { + t.Fatalf("expected %v SocketControlMessage; got scms = %#v", len(testCase), scms) + } + for i, scm := range scms { + gotFds, err := unix.ParseUnixRights(&scm) + if err != nil { + t.Fatalf("ParseUnixRights: %v", err) + } + wantFds := testCase[i] + if len(gotFds) != len(wantFds) { + t.Fatalf("expected %v fds, got %#v", len(wantFds), gotFds) + } + for j, fd := range gotFds { + if fd != wantFds[j] { + t.Fatalf("expected fd %v, got %v", wantFds[j], fd) + } + } + } + } +} + +func TestRlimit(t *testing.T) { + var rlimit, zero unix.Rlimit + err := unix.Getrlimit(unix.RLIMIT_NOFILE, &rlimit) + if err != nil { + t.Fatalf("Getrlimit: save failed: %v", err) + } + if zero == rlimit { + t.Fatalf("Getrlimit: save failed: got zero value %#v", rlimit) + } + set := rlimit + set.Cur = set.Max - 1 + if (runtime.GOOS == "darwin" || runtime.GOOS == "ios") && set.Cur > 4096 { + // rlim_min for RLIMIT_NOFILE should be equal to + // or lower than kern.maxfilesperproc, which on + // some machines are 4096. See #40564. + set.Cur = 4096 + } + err = unix.Setrlimit(unix.RLIMIT_NOFILE, &set) + if err != nil { + t.Fatalf("Setrlimit: set failed: %#v %v", set, err) + } + var get unix.Rlimit + err = unix.Getrlimit(unix.RLIMIT_NOFILE, &get) + if err != nil { + t.Fatalf("Getrlimit: get failed: %v", err) + } + set = rlimit + set.Cur = set.Max - 1 + if (runtime.GOOS == "darwin" || runtime.GOOS == "ios") && set.Cur > 4096 { + set.Cur = 4096 + } + if set != get { + // Seems like Darwin requires some privilege to + // increase the soft limit of rlimit sandbox, though + // Setrlimit never reports an error. + switch runtime.GOOS { + case "darwin", "ios": + default: + t.Fatalf("Rlimit: change failed: wanted %#v got %#v", set, get) + } + } + err = unix.Setrlimit(unix.RLIMIT_NOFILE, &rlimit) + if err != nil { + t.Fatalf("Setrlimit: restore failed: %#v %v", rlimit, err) + } + + // make sure RLIM_INFINITY can be assigned to Rlimit members + _ = unix.Rlimit{ + Cur: unix.RLIM_INFINITY, + Max: unix.RLIM_INFINITY, + } +} + +func TestSeekFailure(t *testing.T) { + _, err := unix.Seek(-1, 0, 0) + if err == nil { + t.Fatalf("Seek(-1, 0, 0) did not fail") + } + str := err.Error() // used to crash on Linux + t.Logf("Seek: %v", str) + if str == "" { + t.Fatalf("Seek(-1, 0, 0) return error with empty message") + } +} + +func TestSetsockoptString(t *testing.T) { + // should not panic on empty string, see issue #31277 + err := unix.SetsockoptString(-1, 0, 0, "") + if err == nil { + t.Fatalf("SetsockoptString: did not fail") + } +} + +func TestDup(t *testing.T) { + file, err := ioutil.TempFile("", "TestDup") + if err != nil { + t.Fatalf("Tempfile failed: %v", err) + } + defer os.Remove(file.Name()) + defer file.Close() + f := int(file.Fd()) + + newFd, err := unix.Dup(f) + if err != nil { + t.Fatalf("Dup: %v", err) + } + + // Create and reserve a file descriptor. + // Dup2 automatically closes it before reusing it. + nullFile, err := os.Open("/dev/null") + if err != nil { + t.Fatal(err) + } + dupFd := int(file.Fd()) + err = unix.Dup2(newFd, dupFd) + if err != nil { + t.Fatalf("Dup2: %v", err) + } + // Keep the dummy file open long enough to not be closed in + // its finalizer. + runtime.KeepAlive(nullFile) + + b1 := []byte("Test123") + b2 := make([]byte, 7) + _, err = unix.Write(dupFd, b1) + if err != nil { + t.Fatalf("Write to dup2 fd failed: %v", err) + } + _, err = unix.Seek(f, 0, 0) + if err != nil { + t.Fatalf("Seek failed: %v", err) + } + _, err = unix.Read(f, b2) + if err != nil { + t.Fatalf("Read back failed: %v", err) + } + if string(b1) != string(b2) { + t.Errorf("Dup: stdout write not in file, expected %v, got %v", string(b1), string(b2)) + } +} + +func TestPoll(t *testing.T) { + if runtime.GOOS == "android" || runtime.GOOS == "ios" { + t.Skip("mkfifo syscall is not available on android and iOS, skipping test") + } + + defer chtmpdir(t)() + f, cleanup := mktmpfifo(t) + defer cleanup() + + const timeout = 100 + + ok := make(chan bool, 1) + go func() { + select { + case <-time.After(10 * timeout * time.Millisecond): + t.Errorf("Poll: failed to timeout after %d milliseconds", 10*timeout) + case <-ok: + } + }() + + for { + fds := []unix.PollFd{{Fd: int32(f.Fd()), Events: unix.POLLIN}} + n, err := unix.Poll(fds, timeout) + ok <- true + if err == unix.EINTR { + t.Logf("Poll interrupted") + continue + } else if err != nil { + t.Errorf("Poll: unexpected error: %v", err) + return + } + if n != 0 { + t.Errorf("Poll: wrong number of events: got %v, expected %v", n, 0) + + // Identify which event(s) caused Poll to return. + // We can't trivially use a table here because Revents + // isn't the same type on all systems. + if fds[0].Revents&unix.POLLIN != 0 { + t.Log("found POLLIN event") + } + if fds[0].Revents&unix.POLLPRI != 0 { + t.Log("found POLLPRI event") + } + if fds[0].Revents&unix.POLLOUT != 0 { + t.Log("found POLLOUT event") + } + if fds[0].Revents&unix.POLLERR != 0 { + t.Log("found POLLERR event") + } + if fds[0].Revents&unix.POLLHUP != 0 { + t.Log("found POLLHUP event") + } + if fds[0].Revents&unix.POLLNVAL != 0 { + t.Log("found POLLNVAL event") + } + } + break + } +} + +func TestSelect(t *testing.T) { + for { + n, err := unix.Select(0, nil, nil, nil, &unix.Timeval{Sec: 0, Usec: 0}) + if err == unix.EINTR { + t.Logf("Select interrupted") + continue + } else if err != nil { + t.Fatalf("Select: %v", err) + } + if n != 0 { + t.Fatalf("Select: got %v ready file descriptors, expected 0", n) + } + break + } + + dur := 250 * time.Millisecond + var took time.Duration + for { + // On some platforms (e.g. Linux), the passed-in timeval is + // updated by select(2). Make sure to reset to the full duration + // in case of an EINTR. + tv := unix.NsecToTimeval(int64(dur)) + start := time.Now() + n, err := unix.Select(0, nil, nil, nil, &tv) + took = time.Since(start) + if err == unix.EINTR { + t.Logf("Select interrupted after %v", took) + continue + } else if err != nil { + t.Fatalf("Select: %v", err) + } + if n != 0 { + t.Fatalf("Select: got %v ready file descriptors, expected 0", n) + } + break + } + + // On some platforms (e.g. NetBSD) the actual timeout might be arbitrarily + // less than requested. However, Linux in particular promises to only return + // early if a file descriptor becomes ready (not applicable here), or the call + // is interrupted by a signal handler (explicitly retried in the loop above), + // or the timeout expires. + if took < dur { + if runtime.GOOS == "linux" { + t.Errorf("Select: slept for %v, expected %v", took, dur) + } else { + t.Logf("Select: slept for %v, requested %v", took, dur) + } + } + + rr, ww, err := os.Pipe() + if err != nil { + t.Fatal(err) + } + defer rr.Close() + defer ww.Close() + + if _, err := ww.Write([]byte("HELLO GOPHER")); err != nil { + t.Fatal(err) + } + + rFdSet := &unix.FdSet{} + fd := int(rr.Fd()) + rFdSet.Set(fd) + + for { + n, err := unix.Select(fd+1, rFdSet, nil, nil, nil) + if err == unix.EINTR { + t.Log("Select interrupted") + continue + } else if err != nil { + t.Fatalf("Select: %v", err) + } + if n != 1 { + t.Fatalf("Select: got %v ready file descriptors, expected 1", n) + } + break + } +} + +func TestGetwd(t *testing.T) { + fd, err := os.Open(".") + if err != nil { + t.Fatalf("Open .: %s", err) + } + defer fd.Close() + // Directory list for test. Do not worry if any are symlinks or do not + // exist on some common unix desktop environments. That will be checked. + dirs := []string{"/", "/usr/bin", "/etc", "/var", "/opt"} + switch runtime.GOOS { + case "android": + dirs = []string{"/", "/system/bin"} + case "ios": + d1, err := ioutil.TempDir("", "d1") + if err != nil { + t.Fatalf("TempDir: %v", err) + } + d2, err := ioutil.TempDir("", "d2") + if err != nil { + t.Fatalf("TempDir: %v", err) + } + dirs = []string{d1, d2} + } + oldwd := os.Getenv("PWD") + for _, d := range dirs { + // Check whether d exists, is a dir and that d's path does not contain a symlink + fi, err := os.Stat(d) + if err != nil || !fi.IsDir() { + t.Logf("Test dir %s stat error (%v) or not a directory, skipping", d, err) + continue + } + check, err := filepath.EvalSymlinks(d) + if err != nil || check != d { + t.Logf("Test dir %s (%s) is symlink or other error (%v), skipping", d, check, err) + continue + } + err = os.Chdir(d) + if err != nil { + t.Fatalf("Chdir: %v", err) + } + pwd, err := unix.Getwd() + if err != nil { + t.Fatalf("Getwd in %s: %s", d, err) + } + os.Setenv("PWD", oldwd) + err = fd.Chdir() + if err != nil { + // We changed the current directory and cannot go back. + // Don't let the tests continue; they'll scribble + // all over some other directory. + fmt.Fprintf(os.Stderr, "fchdir back to dot failed: %s\n", err) + os.Exit(1) + } + if pwd != d { + t.Fatalf("Getwd returned %q want %q", pwd, d) + } + } +} + +func compareStat_t(t *testing.T, otherStat string, st1, st2 *unix.Stat_t) { + if st2.Dev != st1.Dev { + t.Errorf("%s/Fstatat: got dev %v, expected %v", otherStat, st2.Dev, st1.Dev) + } + if st2.Ino != st1.Ino { + t.Errorf("%s/Fstatat: got ino %v, expected %v", otherStat, st2.Ino, st1.Ino) + } + if st2.Mode != st1.Mode { + t.Errorf("%s/Fstatat: got mode %v, expected %v", otherStat, st2.Mode, st1.Mode) + } + if st2.Uid != st1.Uid { + t.Errorf("%s/Fstatat: got uid %v, expected %v", otherStat, st2.Uid, st1.Uid) + } + if st2.Gid != st1.Gid { + t.Errorf("%s/Fstatat: got gid %v, expected %v", otherStat, st2.Gid, st1.Gid) + } + if st2.Size != st1.Size { + t.Errorf("%s/Fstatat: got size %v, expected %v", otherStat, st2.Size, st1.Size) + } +} + +func TestFstatat(t *testing.T) { + defer chtmpdir(t)() + + touch(t, "file1") + + var st1 unix.Stat_t + err := unix.Stat("file1", &st1) + if err != nil { + t.Fatalf("Stat: %v", err) + } + + var st2 unix.Stat_t + err = unix.Fstatat(unix.AT_FDCWD, "file1", &st2, 0) + if err != nil { + t.Fatalf("Fstatat: %v", err) + } + + compareStat_t(t, "Stat", &st1, &st2) + + err = os.Symlink("file1", "symlink1") + if err != nil { + t.Fatal(err) + } + + err = unix.Lstat("symlink1", &st1) + if err != nil { + t.Fatalf("Lstat: %v", err) + } + + err = unix.Fstatat(unix.AT_FDCWD, "symlink1", &st2, unix.AT_SYMLINK_NOFOLLOW) + if err != nil { + t.Fatalf("Fstatat: %v", err) + } + + compareStat_t(t, "Lstat", &st1, &st2) +} + +func TestFchmodat(t *testing.T) { + defer chtmpdir(t)() + + touch(t, "file1") + err := os.Symlink("file1", "symlink1") + if err != nil { + t.Fatal(err) + } + + mode := os.FileMode(0444) + err = unix.Fchmodat(unix.AT_FDCWD, "symlink1", uint32(mode), 0) + if err != nil { + t.Fatalf("Fchmodat: unexpected error: %v", err) + } + + fi, err := os.Stat("file1") + if err != nil { + t.Fatal(err) + } + + if fi.Mode() != mode { + t.Errorf("Fchmodat: failed to change file mode: expected %v, got %v", mode, fi.Mode()) + } + + mode = os.FileMode(0644) + didChmodSymlink := true + err = unix.Fchmodat(unix.AT_FDCWD, "symlink1", uint32(mode), unix.AT_SYMLINK_NOFOLLOW) + if err != nil { + if (runtime.GOOS == "android" || runtime.GOOS == "linux" || + runtime.GOOS == "solaris" || runtime.GOOS == "illumos") && err == unix.EOPNOTSUPP { + // Linux and Illumos don't support flags != 0 + didChmodSymlink = false + } else { + t.Fatalf("Fchmodat: unexpected error: %v", err) + } + } + + if !didChmodSymlink { + // Didn't change mode of the symlink. On Linux, the permissions + // of a symbolic link are always 0777 according to symlink(7) + mode = os.FileMode(0777) + } + + var st unix.Stat_t + err = unix.Lstat("symlink1", &st) + if err != nil { + t.Fatal(err) + } + + got := os.FileMode(st.Mode & 0777) + if got != mode { + t.Errorf("Fchmodat: failed to change symlink mode: expected %v, got %v", mode, got) + } +} + +func TestMkdev(t *testing.T) { + major := uint32(42) + minor := uint32(7) + dev := unix.Mkdev(major, minor) + + if unix.Major(dev) != major { + t.Errorf("Major(%#x) == %d, want %d", dev, unix.Major(dev), major) + } + if unix.Minor(dev) != minor { + t.Errorf("Minor(%#x) == %d, want %d", dev, unix.Minor(dev), minor) + } +} + +func TestPipe(t *testing.T) { + const s = "hello" + var pipes [2]int + err := unix.Pipe(pipes[:]) + if err != nil { + t.Fatalf("pipe: %v", err) + } + r := pipes[0] + w := pipes[1] + go func() { + n, err := unix.Write(w, []byte(s)) + if err != nil { + t.Errorf("bad write: %v", err) + return + } + if n != len(s) { + t.Errorf("bad write count: %d", n) + return + } + err = unix.Close(w) + if err != nil { + t.Errorf("bad close: %v", err) + return + } + }() + var buf [10 + len(s)]byte + n, err := unix.Read(r, buf[:]) + if err != nil { + t.Fatalf("bad read: %v", err) + } + if n != len(s) { + t.Fatalf("bad read count: %d", n) + } + if string(buf[:n]) != s { + t.Fatalf("bad contents: %s", string(buf[:n])) + } + err = unix.Close(r) + if err != nil { + t.Fatalf("bad close: %v", err) + } +} + +func TestRenameat(t *testing.T) { + defer chtmpdir(t)() + + from, to := "renamefrom", "renameto" + + touch(t, from) + + err := unix.Renameat(unix.AT_FDCWD, from, unix.AT_FDCWD, to) + if err != nil { + t.Fatalf("Renameat: unexpected error: %v", err) + } + + _, err = os.Stat(to) + if err != nil { + t.Error(err) + } + + _, err = os.Stat(from) + if err == nil { + t.Errorf("Renameat: stat of renamed file %q unexpectedly succeeded", from) + } +} + +func TestUtimesNanoAt(t *testing.T) { + defer chtmpdir(t)() + + symlink := "symlink1" + os.Remove(symlink) + err := os.Symlink("nonexisting", symlink) + if err != nil { + t.Fatal(err) + } + + // Some filesystems only support microsecond resolution. Account for + // that in Nsec. + ts := []unix.Timespec{ + {Sec: 1111, Nsec: 2000}, + {Sec: 3333, Nsec: 4000}, + } + err = unix.UtimesNanoAt(unix.AT_FDCWD, symlink, ts, unix.AT_SYMLINK_NOFOLLOW) + if err != nil { + t.Fatalf("UtimesNanoAt: %v", err) + } + + var st unix.Stat_t + err = unix.Lstat(symlink, &st) + if err != nil { + t.Fatalf("Lstat: %v", err) + } + + // Only check Mtim, Atim might not be supported by the underlying filesystem + expected := ts[1] + if st.Mtim.Nsec == 0 { + // Some filesystems only support 1-second time stamp resolution + // and will always set Nsec to 0. + expected.Nsec = 0 + } + if st.Mtim != expected { + t.Errorf("UtimesNanoAt: wrong mtime: got %v, expected %v", st.Mtim, expected) + } +} + +func TestSend(t *testing.T) { + ec := make(chan error, 2) + ts := []byte("HELLO GOPHER") + + fds, err := unix.Socketpair(unix.AF_LOCAL, unix.SOCK_STREAM, 0) + if err != nil { + t.Fatalf("Socketpair: %v", err) + } + defer unix.Close(fds[0]) + defer unix.Close(fds[1]) + + go func() { + data := make([]byte, len(ts)) + + _, _, err := unix.Recvfrom(fds[1], data, 0) + if err != nil { + ec <- err + } + if !bytes.Equal(ts, data) { + ec <- fmt.Errorf("data sent != data received. Received %q", data) + } + ec <- nil + }() + err = unix.Send(fds[0], ts, 0) + if err != nil { + ec <- err + } + + select { + case err = <-ec: + if err != nil { + t.Fatalf("Send: %v", err) + } + case <-time.After(2 * time.Second): + t.Fatal("Send: nothing received after 2 seconds") + } +} + +func TestSendmsgBuffers(t *testing.T) { + fds, err := unix.Socketpair(unix.AF_LOCAL, unix.SOCK_STREAM, 0) + if err != nil { + t.Fatal(err) + } + defer unix.Close(fds[0]) + defer unix.Close(fds[1]) + + var wg sync.WaitGroup + wg.Add(1) + go func() { + defer wg.Done() + bufs := [][]byte{ + make([]byte, 5), + nil, + make([]byte, 5), + } + n, oobn, recvflags, _, err := unix.RecvmsgBuffers(fds[1], bufs, nil, 0) + if err != nil { + t.Error(err) + return + } + if n != 10 { + t.Errorf("got %d bytes, want 10", n) + } + if oobn != 0 { + t.Errorf("got %d OOB bytes, want 0", oobn) + } + if recvflags != 0 { + t.Errorf("got flags %#x, want %#x", recvflags, 0) + } + want := [][]byte{ + []byte("01234"), + nil, + []byte("56789"), + } + if !reflect.DeepEqual(bufs, want) { + t.Errorf("got data %q, want %q", bufs, want) + } + }() + + defer wg.Wait() + + bufs := [][]byte{ + []byte("012"), + []byte("34"), + nil, + []byte("5678"), + []byte("9"), + } + n, err := unix.SendmsgBuffers(fds[0], bufs, nil, nil, 0) + if err != nil { + t.Fatal(err) + } + if n != 10 { + t.Errorf("sent %d bytes, want 10", n) + } +} + +// mktmpfifo creates a temporary FIFO and provides a cleanup function. +func mktmpfifo(t *testing.T) (*os.File, func()) { + err := unix.Mkfifo("fifo", 0666) + if err != nil { + t.Fatalf("mktmpfifo: failed to create FIFO: %v", err) + } + + f, err := os.OpenFile("fifo", os.O_RDWR, 0666) + if err != nil { + os.Remove("fifo") + t.Fatalf("mktmpfifo: failed to open FIFO: %v", err) + } + + return f, func() { + f.Close() + os.Remove("fifo") + } +} + +// utilities taken from os/os_test.go + +func touch(t *testing.T, name string) { + f, err := os.Create(name) + if err != nil { + t.Fatal(err) + } + if err := f.Close(); err != nil { + t.Fatal(err) + } +} + +// chtmpdir changes the working directory to a new temporary directory and +// provides a cleanup function. Used when PWD is read-only. +func chtmpdir(t *testing.T) func() { + oldwd, err := os.Getwd() + if err != nil { + t.Fatalf("chtmpdir: %v", err) + } + d, err := ioutil.TempDir("", "test") + if err != nil { + t.Fatalf("chtmpdir: %v", err) + } + if err := os.Chdir(d); err != nil { + t.Fatalf("chtmpdir: %v", err) + } + return func() { + if err := os.Chdir(oldwd); err != nil { + t.Fatalf("chtmpdir: %v", err) + } + os.RemoveAll(d) + } +} |