--- /dev/null
+// 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.
+
+// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
+
+package unix_test
+
+import (
+ "flag"
+ "fmt"
+ "io/ioutil"
+ "net"
+ "os"
+ "os/exec"
+ "path/filepath"
+ "runtime"
+ "strconv"
+ "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("", "TestFnctlInt")
+ 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$" and an environment variable used to signal
+// that the test should become the child process instead.
+func TestPassFD(t *testing.T) {
+ if (runtime.GOOS == "darwin" || runtime.GOOS == "ios") && (runtime.GOARCH == "arm" || runtime.GOARCH == "arm64") {
+ t.Skip("cannot exec subprocess on iOS, skipping test")
+ }
+
+ if os.Getenv("GO_WANT_HELPER_PROCESS") == "1" {
+ passFDChild()
+ return
+ }
+
+ if runtime.GOOS == "aix" {
+ // Unix network isn't properly working on AIX
+ // 7.2 with Technical Level < 2
+ out, err := exec.Command("oslevel", "-s").Output()
+ if err != nil {
+ t.Skipf("skipping on AIX because oslevel -s failed: %v", err)
+ }
+
+ if len(out) < len("7200-XX-ZZ-YYMM") { // AIX 7.2, Tech Level XX, Service Pack ZZ, date YYMM
+ t.Skip("skipping on AIX because oslevel -s hasn't the right length")
+ }
+ aixVer := string(out[:4])
+ tl, err := strconv.Atoi(string(out[5:7]))
+ if err != nil {
+ t.Skipf("skipping on AIX because oslevel -s output cannot be parsed: %v", err)
+ }
+ if aixVer < "7200" || (aixVer == "7200" && tl < 2) {
+ t.Skip("skipped on AIX versions previous to 7.2 TL 2")
+ }
+ }
+
+ tempDir, err := ioutil.TempDir("", "TestPassFD")
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer os.RemoveAll(tempDir)
+
+ fds, err := unix.Socketpair(unix.AF_LOCAL, unix.SOCK_STREAM, 0)
+ if err != nil {
+ t.Fatalf("Socketpair: %v", err)
+ }
+ defer unix.Close(fds[0])
+ defer unix.Close(fds[1])
+ writeFile := os.NewFile(uintptr(fds[0]), "child-writes")
+ readFile := os.NewFile(uintptr(fds[1]), "parent-reads")
+ defer writeFile.Close()
+ defer readFile.Close()
+
+ cmd := exec.Command(os.Args[0], "-test.run=^TestPassFD$", "--", 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 == "darwin" || runtime.GOOS == "ios") && (runtime.GOARCH == "arm" || runtime.GOARCH == "arm64")) {
+ 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:
+ }
+ }()
+
+ fds := []unix.PollFd{{Fd: int32(f.Fd()), Events: unix.POLLIN}}
+ n, err := unix.Poll(fds, timeout)
+ ok <- true
+ 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)
+ return
+ }
+}
+
+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 BSDs the actual timeout might also be slightly less than the requested.
+ // Add an acceptable margin to avoid flaky tests.
+ if took < dur*2/3 {
+ t.Errorf("Select: got %v timeout, expected at least %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 "darwin", "ios":
+ switch runtime.GOARCH {
+ case "arm", "arm64":
+ 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 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)
+ }
+}
+
+// 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)
+ }
+}
+
+func TestPipe(t *testing.T) {
+ const s = "hello"
+ var pipes [2]int
+ unix.Pipe(pipes[:])
+ r := pipes[0]
+ w := pipes[1]
+ go func() {
+ n, err := unix.Write(w, []byte(s))
+ if err != nil {
+ t.Errorf("bad write: %s\n", err)
+ return
+ }
+ if n != len(s) {
+ t.Errorf("bad write count: %d\n", n)
+ return
+ }
+ err = unix.Close(w)
+ if err != nil {
+ t.Errorf("bad close: %s\n", err)
+ return
+ }
+ }()
+ var buf [10 + len(s)]byte
+ n, err := unix.Read(r, buf[:])
+ if err != nil {
+ t.Fatalf("bad read: %s\n", err)
+ }
+ if n != len(s) {
+ t.Fatalf("bad read count: %d\n", n)
+ }
+ if string(buf[:n]) != s {
+ t.Fatalf("bad contents: %s\n", string(buf[:n]))
+ }
+ err = unix.Close(r)
+ if err != nil {
+ t.Fatalf("bad close: %s\n", err)
+ }
+}
projects / dotfiles / .git / blobdiff