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-rw-r--r--src/os/os_test.go1484
1 files changed, 1484 insertions, 0 deletions
diff --git a/src/os/os_test.go b/src/os/os_test.go
new file mode 100644
index 000000000..a30a2b031
--- /dev/null
+++ b/src/os/os_test.go
@@ -0,0 +1,1484 @@
+// Copyright 2009 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.
+
+package os_test
+
+import (
+ "bytes"
+ "errors"
+ "flag"
+ "fmt"
+ "io"
+ "io/ioutil"
+ . "os"
+ osexec "os/exec"
+ "path/filepath"
+ "reflect"
+ "runtime"
+ "sort"
+ "strings"
+ "sync"
+ "syscall"
+ "testing"
+ "text/template"
+ "time"
+)
+
+var supportsSymlinks = true
+
+var dot = []string{
+ "dir_unix.go",
+ "env.go",
+ "error.go",
+ "file.go",
+ "os_test.go",
+ "types.go",
+ "stat_darwin.go",
+ "stat_linux.go",
+}
+
+type sysDir struct {
+ name string
+ files []string
+}
+
+var sysdir = func() (sd *sysDir) {
+ switch runtime.GOOS {
+ case "android":
+ sd = &sysDir{
+ "/system/etc",
+ []string{
+ "audio_policy.conf",
+ "system_fonts.xml",
+ },
+ }
+ case "windows":
+ sd = &sysDir{
+ Getenv("SystemRoot") + "\\system32\\drivers\\etc",
+ []string{
+ "networks",
+ "protocol",
+ "services",
+ },
+ }
+ case "plan9":
+ sd = &sysDir{
+ "/lib/ndb",
+ []string{
+ "common",
+ "local",
+ },
+ }
+ default:
+ sd = &sysDir{
+ "/etc",
+ []string{
+ "group",
+ "hosts",
+ "passwd",
+ },
+ }
+ }
+ return
+}()
+
+func size(name string, t *testing.T) int64 {
+ file, err := Open(name)
+ if err != nil {
+ t.Fatal("open failed:", err)
+ }
+ defer file.Close()
+ var buf [100]byte
+ len := 0
+ for {
+ n, e := file.Read(buf[0:])
+ len += n
+ if e == io.EOF {
+ break
+ }
+ if e != nil {
+ t.Fatal("read failed:", err)
+ }
+ }
+ return int64(len)
+}
+
+func equal(name1, name2 string) (r bool) {
+ switch runtime.GOOS {
+ case "windows":
+ r = strings.ToLower(name1) == strings.ToLower(name2)
+ default:
+ r = name1 == name2
+ }
+ return
+}
+
+func newFile(testName string, t *testing.T) (f *File) {
+ // Use a local file system, not NFS.
+ // On Unix, override $TMPDIR in case the user
+ // has it set to an NFS-mounted directory.
+ dir := ""
+ if runtime.GOOS != "android" && runtime.GOOS != "windows" {
+ dir = "/tmp"
+ }
+ f, err := ioutil.TempFile(dir, "_Go_"+testName)
+ if err != nil {
+ t.Fatalf("TempFile %s: %s", testName, err)
+ }
+ return
+}
+
+func newDir(testName string, t *testing.T) (name string) {
+ // Use a local file system, not NFS.
+ // On Unix, override $TMPDIR in case the user
+ // has it set to an NFS-mounted directory.
+ dir := ""
+ if runtime.GOOS != "android" && runtime.GOOS != "windows" {
+ dir = "/tmp"
+ }
+ name, err := ioutil.TempDir(dir, "_Go_"+testName)
+ if err != nil {
+ t.Fatalf("TempDir %s: %s", testName, err)
+ }
+ return
+}
+
+var sfdir = sysdir.name
+var sfname = sysdir.files[0]
+
+func TestStat(t *testing.T) {
+ path := sfdir + "/" + sfname
+ dir, err := Stat(path)
+ if err != nil {
+ t.Fatal("stat failed:", err)
+ }
+ if !equal(sfname, dir.Name()) {
+ t.Error("name should be ", sfname, "; is", dir.Name())
+ }
+ filesize := size(path, t)
+ if dir.Size() != filesize {
+ t.Error("size should be", filesize, "; is", dir.Size())
+ }
+}
+
+func TestFstat(t *testing.T) {
+ path := sfdir + "/" + sfname
+ file, err1 := Open(path)
+ if err1 != nil {
+ t.Fatal("open failed:", err1)
+ }
+ defer file.Close()
+ dir, err2 := file.Stat()
+ if err2 != nil {
+ t.Fatal("fstat failed:", err2)
+ }
+ if !equal(sfname, dir.Name()) {
+ t.Error("name should be ", sfname, "; is", dir.Name())
+ }
+ filesize := size(path, t)
+ if dir.Size() != filesize {
+ t.Error("size should be", filesize, "; is", dir.Size())
+ }
+}
+
+func TestLstat(t *testing.T) {
+ path := sfdir + "/" + sfname
+ dir, err := Lstat(path)
+ if err != nil {
+ t.Fatal("lstat failed:", err)
+ }
+ if !equal(sfname, dir.Name()) {
+ t.Error("name should be ", sfname, "; is", dir.Name())
+ }
+ filesize := size(path, t)
+ if dir.Size() != filesize {
+ t.Error("size should be", filesize, "; is", dir.Size())
+ }
+}
+
+// Read with length 0 should not return EOF.
+func TestRead0(t *testing.T) {
+ path := sfdir + "/" + sfname
+ f, err := Open(path)
+ if err != nil {
+ t.Fatal("open failed:", err)
+ }
+ defer f.Close()
+
+ b := make([]byte, 0)
+ n, err := f.Read(b)
+ if n != 0 || err != nil {
+ t.Errorf("Read(0) = %d, %v, want 0, nil", n, err)
+ }
+ b = make([]byte, 100)
+ n, err = f.Read(b)
+ if n <= 0 || err != nil {
+ t.Errorf("Read(100) = %d, %v, want >0, nil", n, err)
+ }
+}
+
+func testReaddirnames(dir string, contents []string, t *testing.T) {
+ file, err := Open(dir)
+ if err != nil {
+ t.Fatalf("open %q failed: %v", dir, err)
+ }
+ defer file.Close()
+ s, err2 := file.Readdirnames(-1)
+ if err2 != nil {
+ t.Fatalf("readdirnames %q failed: %v", dir, err2)
+ }
+ for _, m := range contents {
+ found := false
+ for _, n := range s {
+ if n == "." || n == ".." {
+ t.Errorf("got %s in directory", n)
+ }
+ if equal(m, n) {
+ if found {
+ t.Error("present twice:", m)
+ }
+ found = true
+ }
+ }
+ if !found {
+ t.Error("could not find", m)
+ }
+ }
+}
+
+func testReaddir(dir string, contents []string, t *testing.T) {
+ file, err := Open(dir)
+ if err != nil {
+ t.Fatalf("open %q failed: %v", dir, err)
+ }
+ defer file.Close()
+ s, err2 := file.Readdir(-1)
+ if err2 != nil {
+ t.Fatalf("readdir %q failed: %v", dir, err2)
+ }
+ for _, m := range contents {
+ found := false
+ for _, n := range s {
+ if equal(m, n.Name()) {
+ if found {
+ t.Error("present twice:", m)
+ }
+ found = true
+ }
+ }
+ if !found {
+ t.Error("could not find", m)
+ }
+ }
+}
+
+func TestReaddirnames(t *testing.T) {
+ testReaddirnames(".", dot, t)
+ testReaddirnames(sysdir.name, sysdir.files, t)
+}
+
+func TestReaddir(t *testing.T) {
+ testReaddir(".", dot, t)
+ testReaddir(sysdir.name, sysdir.files, t)
+}
+
+// Read the directory one entry at a time.
+func smallReaddirnames(file *File, length int, t *testing.T) []string {
+ names := make([]string, length)
+ count := 0
+ for {
+ d, err := file.Readdirnames(1)
+ if err == io.EOF {
+ break
+ }
+ if err != nil {
+ t.Fatalf("readdirnames %q failed: %v", file.Name(), err)
+ }
+ if len(d) == 0 {
+ t.Fatalf("readdirnames %q returned empty slice and no error", file.Name())
+ }
+ names[count] = d[0]
+ count++
+ }
+ return names[0:count]
+}
+
+// Check that reading a directory one entry at a time gives the same result
+// as reading it all at once.
+func TestReaddirnamesOneAtATime(t *testing.T) {
+ // big directory that doesn't change often.
+ dir := "/usr/bin"
+ switch runtime.GOOS {
+ case "android":
+ dir = "/system/bin"
+ case "plan9":
+ dir = "/bin"
+ case "windows":
+ dir = Getenv("SystemRoot") + "\\system32"
+ }
+ file, err := Open(dir)
+ if err != nil {
+ t.Fatalf("open %q failed: %v", dir, err)
+ }
+ defer file.Close()
+ all, err1 := file.Readdirnames(-1)
+ if err1 != nil {
+ t.Fatalf("readdirnames %q failed: %v", dir, err1)
+ }
+ file1, err2 := Open(dir)
+ if err2 != nil {
+ t.Fatalf("open %q failed: %v", dir, err2)
+ }
+ defer file1.Close()
+ small := smallReaddirnames(file1, len(all)+100, t) // +100 in case we screw up
+ if len(small) < len(all) {
+ t.Fatalf("len(small) is %d, less than %d", len(small), len(all))
+ }
+ for i, n := range all {
+ if small[i] != n {
+ t.Errorf("small read %q mismatch: %v", small[i], n)
+ }
+ }
+}
+
+func TestReaddirNValues(t *testing.T) {
+ if testing.Short() {
+ t.Skip("test.short; skipping")
+ }
+ dir, err := ioutil.TempDir("", "")
+ if err != nil {
+ t.Fatalf("TempDir: %v", err)
+ }
+ defer RemoveAll(dir)
+ for i := 1; i <= 105; i++ {
+ f, err := Create(filepath.Join(dir, fmt.Sprintf("%d", i)))
+ if err != nil {
+ t.Fatalf("Create: %v", err)
+ }
+ f.Write([]byte(strings.Repeat("X", i)))
+ f.Close()
+ }
+
+ var d *File
+ openDir := func() {
+ var err error
+ d, err = Open(dir)
+ if err != nil {
+ t.Fatalf("Open directory: %v", err)
+ }
+ }
+
+ readDirExpect := func(n, want int, wantErr error) {
+ fi, err := d.Readdir(n)
+ if err != wantErr {
+ t.Fatalf("Readdir of %d got error %v, want %v", n, err, wantErr)
+ }
+ if g, e := len(fi), want; g != e {
+ t.Errorf("Readdir of %d got %d files, want %d", n, g, e)
+ }
+ }
+
+ readDirNamesExpect := func(n, want int, wantErr error) {
+ fi, err := d.Readdirnames(n)
+ if err != wantErr {
+ t.Fatalf("Readdirnames of %d got error %v, want %v", n, err, wantErr)
+ }
+ if g, e := len(fi), want; g != e {
+ t.Errorf("Readdirnames of %d got %d files, want %d", n, g, e)
+ }
+ }
+
+ for _, fn := range []func(int, int, error){readDirExpect, readDirNamesExpect} {
+ // Test the slurp case
+ openDir()
+ fn(0, 105, nil)
+ fn(0, 0, nil)
+ d.Close()
+
+ // Slurp with -1 instead
+ openDir()
+ fn(-1, 105, nil)
+ fn(-2, 0, nil)
+ fn(0, 0, nil)
+ d.Close()
+
+ // Test the bounded case
+ openDir()
+ fn(1, 1, nil)
+ fn(2, 2, nil)
+ fn(105, 102, nil) // and tests buffer >100 case
+ fn(3, 0, io.EOF)
+ d.Close()
+ }
+}
+
+func touch(t *testing.T, name string) {
+ f, err := Create(name)
+ if err != nil {
+ t.Fatal(err)
+ }
+ if err := f.Close(); err != nil {
+ t.Fatal(err)
+ }
+}
+
+func TestReaddirStatFailures(t *testing.T) {
+ switch runtime.GOOS {
+ case "windows", "plan9":
+ // Windows and Plan 9 already do this correctly,
+ // but are structured with different syscalls such
+ // that they don't use Lstat, so the hook below for
+ // testing it wouldn't work.
+ t.Skipf("skipping test on %v", runtime.GOOS)
+ }
+ dir, err := ioutil.TempDir("", "")
+ if err != nil {
+ t.Fatalf("TempDir: %v", err)
+ }
+ defer RemoveAll(dir)
+ touch(t, filepath.Join(dir, "good1"))
+ touch(t, filepath.Join(dir, "x")) // will disappear or have an error
+ touch(t, filepath.Join(dir, "good2"))
+ defer func() {
+ *LstatP = Lstat
+ }()
+ var xerr error // error to return for x
+ *LstatP = func(path string) (FileInfo, error) {
+ if xerr != nil && strings.HasSuffix(path, "x") {
+ return nil, xerr
+ }
+ return Lstat(path)
+ }
+ readDir := func() ([]FileInfo, error) {
+ d, err := Open(dir)
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer d.Close()
+ return d.Readdir(-1)
+ }
+ mustReadDir := func(testName string) []FileInfo {
+ fis, err := readDir()
+ if err != nil {
+ t.Fatalf("%s: Readdir: %v", testName, err)
+ }
+ return fis
+ }
+ names := func(fis []FileInfo) []string {
+ s := make([]string, len(fis))
+ for i, fi := range fis {
+ s[i] = fi.Name()
+ }
+ sort.Strings(s)
+ return s
+ }
+
+ if got, want := names(mustReadDir("inital readdir")),
+ []string{"good1", "good2", "x"}; !reflect.DeepEqual(got, want) {
+ t.Errorf("initial readdir got %q; want %q", got, want)
+ }
+
+ xerr = ErrNotExist
+ if got, want := names(mustReadDir("with x disappearing")),
+ []string{"good1", "good2"}; !reflect.DeepEqual(got, want) {
+ t.Errorf("with x disappearing, got %q; want %q", got, want)
+ }
+
+ xerr = errors.New("some real error")
+ if _, err := readDir(); err != xerr {
+ t.Errorf("with a non-ErrNotExist error, got error %v; want %v", err, xerr)
+ }
+}
+
+func TestHardLink(t *testing.T) {
+ // Hardlinks are not supported under windows or Plan 9.
+ if runtime.GOOS == "plan9" {
+ return
+ }
+ from, to := "hardlinktestfrom", "hardlinktestto"
+ Remove(from) // Just in case.
+ file, err := Create(to)
+ if err != nil {
+ t.Fatalf("open %q failed: %v", to, err)
+ }
+ defer Remove(to)
+ if err = file.Close(); err != nil {
+ t.Errorf("close %q failed: %v", to, err)
+ }
+ err = Link(to, from)
+ if err != nil {
+ t.Fatalf("link %q, %q failed: %v", to, from, err)
+ }
+ defer Remove(from)
+ tostat, err := Stat(to)
+ if err != nil {
+ t.Fatalf("stat %q failed: %v", to, err)
+ }
+ fromstat, err := Stat(from)
+ if err != nil {
+ t.Fatalf("stat %q failed: %v", from, err)
+ }
+ if !SameFile(tostat, fromstat) {
+ t.Errorf("link %q, %q did not create hard link", to, from)
+ }
+}
+
+func TestSymlink(t *testing.T) {
+ switch runtime.GOOS {
+ case "android", "nacl", "plan9":
+ t.Skipf("skipping on %s", runtime.GOOS)
+ case "windows":
+ if !supportsSymlinks {
+ t.Skipf("skipping on %s", runtime.GOOS)
+ }
+ }
+ from, to := "symlinktestfrom", "symlinktestto"
+ Remove(from) // Just in case.
+ file, err := Create(to)
+ if err != nil {
+ t.Fatalf("open %q failed: %v", to, err)
+ }
+ defer Remove(to)
+ if err = file.Close(); err != nil {
+ t.Errorf("close %q failed: %v", to, err)
+ }
+ err = Symlink(to, from)
+ if err != nil {
+ t.Fatalf("symlink %q, %q failed: %v", to, from, err)
+ }
+ defer Remove(from)
+ tostat, err := Lstat(to)
+ if err != nil {
+ t.Fatalf("stat %q failed: %v", to, err)
+ }
+ if tostat.Mode()&ModeSymlink != 0 {
+ t.Fatalf("stat %q claims to have found a symlink", to)
+ }
+ fromstat, err := Stat(from)
+ if err != nil {
+ t.Fatalf("stat %q failed: %v", from, err)
+ }
+ if !SameFile(tostat, fromstat) {
+ t.Errorf("symlink %q, %q did not create symlink", to, from)
+ }
+ fromstat, err = Lstat(from)
+ if err != nil {
+ t.Fatalf("lstat %q failed: %v", from, err)
+ }
+ if fromstat.Mode()&ModeSymlink == 0 {
+ t.Fatalf("symlink %q, %q did not create symlink", to, from)
+ }
+ fromstat, err = Stat(from)
+ if err != nil {
+ t.Fatalf("stat %q failed: %v", from, err)
+ }
+ if fromstat.Mode()&ModeSymlink != 0 {
+ t.Fatalf("stat %q did not follow symlink", from)
+ }
+ s, err := Readlink(from)
+ if err != nil {
+ t.Fatalf("readlink %q failed: %v", from, err)
+ }
+ if s != to {
+ t.Fatalf("after symlink %q != %q", s, to)
+ }
+ file, err = Open(from)
+ if err != nil {
+ t.Fatalf("open %q failed: %v", from, err)
+ }
+ file.Close()
+}
+
+func TestLongSymlink(t *testing.T) {
+ switch runtime.GOOS {
+ case "plan9", "nacl":
+ t.Skipf("skipping on %s", runtime.GOOS)
+ case "windows":
+ if !supportsSymlinks {
+ t.Skipf("skipping on %s", runtime.GOOS)
+ }
+ }
+ s := "0123456789abcdef"
+ // Long, but not too long: a common limit is 255.
+ s = s + s + s + s + s + s + s + s + s + s + s + s + s + s + s
+ from := "longsymlinktestfrom"
+ Remove(from) // Just in case.
+ err := Symlink(s, from)
+ if err != nil {
+ t.Fatalf("symlink %q, %q failed: %v", s, from, err)
+ }
+ defer Remove(from)
+ r, err := Readlink(from)
+ if err != nil {
+ t.Fatalf("readlink %q failed: %v", from, err)
+ }
+ if r != s {
+ t.Fatalf("after symlink %q != %q", r, s)
+ }
+}
+
+func TestRename(t *testing.T) {
+ from, to := "renamefrom", "renameto"
+ Remove(to) // Just in case.
+ file, err := Create(from)
+ if err != nil {
+ t.Fatalf("open %q failed: %v", to, err)
+ }
+ if err = file.Close(); err != nil {
+ t.Errorf("close %q failed: %v", to, err)
+ }
+ err = Rename(from, to)
+ if err != nil {
+ t.Fatalf("rename %q, %q failed: %v", to, from, err)
+ }
+ defer Remove(to)
+ _, err = Stat(to)
+ if err != nil {
+ t.Errorf("stat %q failed: %v", to, err)
+ }
+}
+
+func exec(t *testing.T, dir, cmd string, args []string, expect string) {
+ r, w, err := Pipe()
+ if err != nil {
+ t.Fatalf("Pipe: %v", err)
+ }
+ defer r.Close()
+ attr := &ProcAttr{Dir: dir, Files: []*File{nil, w, Stderr}}
+ p, err := StartProcess(cmd, args, attr)
+ if err != nil {
+ t.Fatalf("StartProcess: %v", err)
+ }
+ w.Close()
+
+ var b bytes.Buffer
+ io.Copy(&b, r)
+ output := b.String()
+
+ fi1, _ := Stat(strings.TrimSpace(output))
+ fi2, _ := Stat(expect)
+ if !SameFile(fi1, fi2) {
+ t.Errorf("exec %q returned %q wanted %q",
+ strings.Join(append([]string{cmd}, args...), " "), output, expect)
+ }
+ p.Wait()
+}
+
+func TestStartProcess(t *testing.T) {
+ switch runtime.GOOS {
+ case "android", "nacl":
+ t.Skipf("skipping on %s", runtime.GOOS)
+ }
+
+ var dir, cmd string
+ var args []string
+ if runtime.GOOS == "windows" {
+ cmd = Getenv("COMSPEC")
+ dir = Getenv("SystemRoot")
+ args = []string{"/c", "cd"}
+ } else {
+ cmd = "/bin/pwd"
+ dir = "/"
+ args = []string{}
+ }
+ cmddir, cmdbase := filepath.Split(cmd)
+ args = append([]string{cmdbase}, args...)
+ // Test absolute executable path.
+ exec(t, dir, cmd, args, dir)
+ // Test relative executable path.
+ exec(t, cmddir, cmdbase, args, cmddir)
+}
+
+func checkMode(t *testing.T, path string, mode FileMode) {
+ dir, err := Stat(path)
+ if err != nil {
+ t.Fatalf("Stat %q (looking for mode %#o): %s", path, mode, err)
+ }
+ if dir.Mode()&0777 != mode {
+ t.Errorf("Stat %q: mode %#o want %#o", path, dir.Mode(), mode)
+ }
+}
+
+func TestChmod(t *testing.T) {
+ // Chmod is not supported under windows.
+ if runtime.GOOS == "windows" {
+ return
+ }
+ f := newFile("TestChmod", t)
+ defer Remove(f.Name())
+ defer f.Close()
+
+ if err := Chmod(f.Name(), 0456); err != nil {
+ t.Fatalf("chmod %s 0456: %s", f.Name(), err)
+ }
+ checkMode(t, f.Name(), 0456)
+
+ if err := f.Chmod(0123); err != nil {
+ t.Fatalf("chmod %s 0123: %s", f.Name(), err)
+ }
+ checkMode(t, f.Name(), 0123)
+}
+
+func checkSize(t *testing.T, f *File, size int64) {
+ dir, err := f.Stat()
+ if err != nil {
+ t.Fatalf("Stat %q (looking for size %d): %s", f.Name(), size, err)
+ }
+ if dir.Size() != size {
+ t.Errorf("Stat %q: size %d want %d", f.Name(), dir.Size(), size)
+ }
+}
+
+func TestFTruncate(t *testing.T) {
+ f := newFile("TestFTruncate", t)
+ defer Remove(f.Name())
+ defer f.Close()
+
+ checkSize(t, f, 0)
+ f.Write([]byte("hello, world\n"))
+ checkSize(t, f, 13)
+ f.Truncate(10)
+ checkSize(t, f, 10)
+ f.Truncate(1024)
+ checkSize(t, f, 1024)
+ f.Truncate(0)
+ checkSize(t, f, 0)
+ _, err := f.Write([]byte("surprise!"))
+ if err == nil {
+ checkSize(t, f, 13+9) // wrote at offset past where hello, world was.
+ }
+}
+
+func TestTruncate(t *testing.T) {
+ f := newFile("TestTruncate", t)
+ defer Remove(f.Name())
+ defer f.Close()
+
+ checkSize(t, f, 0)
+ f.Write([]byte("hello, world\n"))
+ checkSize(t, f, 13)
+ Truncate(f.Name(), 10)
+ checkSize(t, f, 10)
+ Truncate(f.Name(), 1024)
+ checkSize(t, f, 1024)
+ Truncate(f.Name(), 0)
+ checkSize(t, f, 0)
+ _, err := f.Write([]byte("surprise!"))
+ if err == nil {
+ checkSize(t, f, 13+9) // wrote at offset past where hello, world was.
+ }
+}
+
+// Use TempDir (via newFile) to make sure we're on a local file system,
+// so that timings are not distorted by latency and caching.
+// On NFS, timings can be off due to caching of meta-data on
+// NFS servers (Issue 848).
+func TestChtimes(t *testing.T) {
+ f := newFile("TestChtimes", t)
+ defer Remove(f.Name())
+
+ f.Write([]byte("hello, world\n"))
+ f.Close()
+
+ testChtimes(t, f.Name())
+}
+
+// Use TempDir (via newDir) to make sure we're on a local file system,
+// so that timings are not distorted by latency and caching.
+// On NFS, timings can be off due to caching of meta-data on
+// NFS servers (Issue 848).
+func TestChtimesDir(t *testing.T) {
+ name := newDir("TestChtimes", t)
+ defer RemoveAll(name)
+
+ testChtimes(t, name)
+}
+
+func testChtimes(t *testing.T, name string) {
+ st, err := Stat(name)
+ if err != nil {
+ t.Fatalf("Stat %s: %s", name, err)
+ }
+ preStat := st
+
+ // Move access and modification time back a second
+ at := Atime(preStat)
+ mt := preStat.ModTime()
+ err = Chtimes(name, at.Add(-time.Second), mt.Add(-time.Second))
+ if err != nil {
+ t.Fatalf("Chtimes %s: %s", name, err)
+ }
+
+ st, err = Stat(name)
+ if err != nil {
+ t.Fatalf("second Stat %s: %s", name, err)
+ }
+ postStat := st
+
+ /* Plan 9, NaCl:
+ Mtime is the time of the last change of content. Similarly, atime is set whenever the
+ contents are accessed; also, it is set whenever mtime is set.
+ */
+ pat := Atime(postStat)
+ pmt := postStat.ModTime()
+ if !pat.Before(at) && runtime.GOOS != "plan9" && runtime.GOOS != "nacl" {
+ t.Errorf("AccessTime didn't go backwards; was=%d, after=%d", at, pat)
+ }
+
+ if !pmt.Before(mt) {
+ t.Errorf("ModTime didn't go backwards; was=%d, after=%d", mt, pmt)
+ }
+}
+
+func TestChdirAndGetwd(t *testing.T) {
+ // TODO(brainman): file.Chdir() is not implemented on windows.
+ if runtime.GOOS == "windows" {
+ return
+ }
+ fd, err := Open(".")
+ if err != nil {
+ t.Fatalf("Open .: %s", err)
+ }
+ // These are chosen carefully not to be symlinks on a Mac
+ // (unlike, say, /var, /etc), except /tmp, which we handle below.
+ dirs := []string{"/", "/usr/bin", "/tmp"}
+ // /usr/bin does not usually exist on Plan 9 or Android.
+ switch runtime.GOOS {
+ case "android":
+ dirs = []string{"/", "/system/bin"}
+ case "plan9":
+ dirs = []string{"/", "/usr"}
+ }
+ oldwd := Getenv("PWD")
+ for mode := 0; mode < 2; mode++ {
+ for _, d := range dirs {
+ if mode == 0 {
+ err = Chdir(d)
+ } else {
+ fd1, err := Open(d)
+ if err != nil {
+ t.Errorf("Open %s: %s", d, err)
+ continue
+ }
+ err = fd1.Chdir()
+ fd1.Close()
+ }
+ if d == "/tmp" {
+ Setenv("PWD", "/tmp")
+ }
+ pwd, err1 := Getwd()
+ Setenv("PWD", oldwd)
+ err2 := fd.Chdir()
+ if err2 != 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(Stderr, "fchdir back to dot failed: %s\n", err2)
+ Exit(1)
+ }
+ if err != nil {
+ fd.Close()
+ t.Fatalf("Chdir %s: %s", d, err)
+ }
+ if err1 != nil {
+ fd.Close()
+ t.Fatalf("Getwd in %s: %s", d, err1)
+ }
+ if pwd != d {
+ fd.Close()
+ t.Fatalf("Getwd returned %q want %q", pwd, d)
+ }
+ }
+ }
+ fd.Close()
+}
+
+func TestSeek(t *testing.T) {
+ f := newFile("TestSeek", t)
+ defer Remove(f.Name())
+ defer f.Close()
+
+ const data = "hello, world\n"
+ io.WriteString(f, data)
+
+ type test struct {
+ in int64
+ whence int
+ out int64
+ }
+ var tests = []test{
+ {0, 1, int64(len(data))},
+ {0, 0, 0},
+ {5, 0, 5},
+ {0, 2, int64(len(data))},
+ {0, 0, 0},
+ {-1, 2, int64(len(data)) - 1},
+ {1 << 33, 0, 1 << 33},
+ {1 << 33, 2, 1<<33 + int64(len(data))},
+ }
+ for i, tt := range tests {
+ off, err := f.Seek(tt.in, tt.whence)
+ if off != tt.out || err != nil {
+ if e, ok := err.(*PathError); ok && e.Err == syscall.EINVAL && tt.out > 1<<32 {
+ // Reiserfs rejects the big seeks.
+ // http://code.google.com/p/go/issues/detail?id=91
+ break
+ }
+ t.Errorf("#%d: Seek(%v, %v) = %v, %v want %v, nil", i, tt.in, tt.whence, off, err, tt.out)
+ }
+ }
+}
+
+type openErrorTest struct {
+ path string
+ mode int
+ error error
+}
+
+var openErrorTests = []openErrorTest{
+ {
+ sfdir + "/no-such-file",
+ O_RDONLY,
+ syscall.ENOENT,
+ },
+ {
+ sfdir,
+ O_WRONLY,
+ syscall.EISDIR,
+ },
+ {
+ sfdir + "/" + sfname + "/no-such-file",
+ O_WRONLY,
+ syscall.ENOTDIR,
+ },
+}
+
+func TestOpenError(t *testing.T) {
+ for _, tt := range openErrorTests {
+ f, err := OpenFile(tt.path, tt.mode, 0)
+ if err == nil {
+ t.Errorf("Open(%q, %d) succeeded", tt.path, tt.mode)
+ f.Close()
+ continue
+ }
+ perr, ok := err.(*PathError)
+ if !ok {
+ t.Errorf("Open(%q, %d) returns error of %T type; want *PathError", tt.path, tt.mode, err)
+ }
+ if perr.Err != tt.error {
+ if runtime.GOOS == "plan9" {
+ syscallErrStr := perr.Err.Error()
+ expectedErrStr := strings.Replace(tt.error.Error(), "file ", "", 1)
+ if !strings.HasSuffix(syscallErrStr, expectedErrStr) {
+ // Some Plan 9 file servers incorrectly return
+ // EACCES rather than EISDIR when a directory is
+ // opened for write.
+ if tt.error == syscall.EISDIR && strings.HasSuffix(syscallErrStr, syscall.EACCES.Error()) {
+ continue
+ }
+ t.Errorf("Open(%q, %d) = _, %q; want suffix %q", tt.path, tt.mode, syscallErrStr, expectedErrStr)
+ }
+ continue
+ }
+ if runtime.GOOS == "dragonfly" {
+ // DragonFly incorrectly returns EACCES rather
+ // EISDIR when a directory is opened for write.
+ if tt.error == syscall.EISDIR && perr.Err == syscall.EACCES {
+ continue
+ }
+ }
+ t.Errorf("Open(%q, %d) = _, %q; want %q", tt.path, tt.mode, perr.Err.Error(), tt.error.Error())
+ }
+ }
+}
+
+func TestOpenNoName(t *testing.T) {
+ f, err := Open("")
+ if err == nil {
+ t.Fatal(`Open("") succeeded`)
+ f.Close()
+ }
+}
+
+func run(t *testing.T, cmd []string) string {
+ // Run /bin/hostname and collect output.
+ r, w, err := Pipe()
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer r.Close()
+ p, err := StartProcess("/bin/hostname", []string{"hostname"}, &ProcAttr{Files: []*File{nil, w, Stderr}})
+ if err != nil {
+ t.Fatal(err)
+ }
+ w.Close()
+
+ var b bytes.Buffer
+ io.Copy(&b, r)
+ _, err = p.Wait()
+ if err != nil {
+ t.Fatalf("run hostname Wait: %v", err)
+ }
+ err = p.Kill()
+ if err == nil {
+ t.Errorf("expected an error from Kill running 'hostname'")
+ }
+ output := b.String()
+ if n := len(output); n > 0 && output[n-1] == '\n' {
+ output = output[0 : n-1]
+ }
+ if output == "" {
+ t.Fatalf("%v produced no output", cmd)
+ }
+
+ return output
+}
+
+func TestHostname(t *testing.T) {
+ // There is no other way to fetch hostname on windows, but via winapi.
+ // On Plan 9 it can be taken from #c/sysname as Hostname() does.
+ switch runtime.GOOS {
+ case "android", "nacl", "plan9", "windows":
+ t.Skipf("skipping on %s", runtime.GOOS)
+ }
+
+ // Check internal Hostname() against the output of /bin/hostname.
+ // Allow that the internal Hostname returns a Fully Qualified Domain Name
+ // and the /bin/hostname only returns the first component
+ hostname, err := Hostname()
+ if err != nil {
+ t.Fatalf("%v", err)
+ }
+ want := run(t, []string{"/bin/hostname"})
+ if hostname != want {
+ i := strings.Index(hostname, ".")
+ if i < 0 || hostname[0:i] != want {
+ t.Errorf("Hostname() = %q, want %q", hostname, want)
+ }
+ }
+}
+
+func TestReadAt(t *testing.T) {
+ f := newFile("TestReadAt", t)
+ defer Remove(f.Name())
+ defer f.Close()
+
+ const data = "hello, world\n"
+ io.WriteString(f, data)
+
+ b := make([]byte, 5)
+ n, err := f.ReadAt(b, 7)
+ if err != nil || n != len(b) {
+ t.Fatalf("ReadAt 7: %d, %v", n, err)
+ }
+ if string(b) != "world" {
+ t.Fatalf("ReadAt 7: have %q want %q", string(b), "world")
+ }
+}
+
+func TestWriteAt(t *testing.T) {
+ f := newFile("TestWriteAt", t)
+ defer Remove(f.Name())
+ defer f.Close()
+
+ const data = "hello, world\n"
+ io.WriteString(f, data)
+
+ n, err := f.WriteAt([]byte("WORLD"), 7)
+ if err != nil || n != 5 {
+ t.Fatalf("WriteAt 7: %d, %v", n, err)
+ }
+
+ b, err := ioutil.ReadFile(f.Name())
+ if err != nil {
+ t.Fatalf("ReadFile %s: %v", f.Name(), err)
+ }
+ if string(b) != "hello, WORLD\n" {
+ t.Fatalf("after write: have %q want %q", string(b), "hello, WORLD\n")
+ }
+}
+
+func writeFile(t *testing.T, fname string, flag int, text string) string {
+ f, err := OpenFile(fname, flag, 0666)
+ if err != nil {
+ t.Fatalf("Open: %v", err)
+ }
+ n, err := io.WriteString(f, text)
+ if err != nil {
+ t.Fatalf("WriteString: %d, %v", n, err)
+ }
+ f.Close()
+ data, err := ioutil.ReadFile(fname)
+ if err != nil {
+ t.Fatalf("ReadFile: %v", err)
+ }
+ return string(data)
+}
+
+func TestAppend(t *testing.T) {
+ const f = "append.txt"
+ defer Remove(f)
+ s := writeFile(t, f, O_CREATE|O_TRUNC|O_RDWR, "new")
+ if s != "new" {
+ t.Fatalf("writeFile: have %q want %q", s, "new")
+ }
+ s = writeFile(t, f, O_APPEND|O_RDWR, "|append")
+ if s != "new|append" {
+ t.Fatalf("writeFile: have %q want %q", s, "new|append")
+ }
+ s = writeFile(t, f, O_CREATE|O_APPEND|O_RDWR, "|append")
+ if s != "new|append|append" {
+ t.Fatalf("writeFile: have %q want %q", s, "new|append|append")
+ }
+ err := Remove(f)
+ if err != nil {
+ t.Fatalf("Remove: %v", err)
+ }
+ s = writeFile(t, f, O_CREATE|O_APPEND|O_RDWR, "new&append")
+ if s != "new&append" {
+ t.Fatalf("writeFile: after append have %q want %q", s, "new&append")
+ }
+ s = writeFile(t, f, O_CREATE|O_RDWR, "old")
+ if s != "old&append" {
+ t.Fatalf("writeFile: after create have %q want %q", s, "old&append")
+ }
+ s = writeFile(t, f, O_CREATE|O_TRUNC|O_RDWR, "new")
+ if s != "new" {
+ t.Fatalf("writeFile: after truncate have %q want %q", s, "new")
+ }
+}
+
+func TestStatDirWithTrailingSlash(t *testing.T) {
+ // Create new temporary directory and arrange to clean it up.
+ path, err := ioutil.TempDir("", "/_TestStatDirWithSlash_")
+ if err != nil {
+ t.Fatalf("TempDir: %s", err)
+ }
+ defer RemoveAll(path)
+
+ // Stat of path should succeed.
+ _, err = Stat(path)
+ if err != nil {
+ t.Fatalf("stat %s failed: %s", path, err)
+ }
+
+ // Stat of path+"/" should succeed too.
+ path += "/"
+ _, err = Stat(path)
+ if err != nil {
+ t.Fatalf("stat %s failed: %s", path, err)
+ }
+}
+
+func TestNilProcessStateString(t *testing.T) {
+ var ps *ProcessState
+ s := ps.String()
+ if s != "<nil>" {
+ t.Errorf("(*ProcessState)(nil).String() = %q, want %q", s, "<nil>")
+ }
+}
+
+func TestSameFile(t *testing.T) {
+ fa, err := Create("a")
+ if err != nil {
+ t.Fatalf("Create(a): %v", err)
+ }
+ defer Remove(fa.Name())
+ fa.Close()
+ fb, err := Create("b")
+ if err != nil {
+ t.Fatalf("Create(b): %v", err)
+ }
+ defer Remove(fb.Name())
+ fb.Close()
+
+ ia1, err := Stat("a")
+ if err != nil {
+ t.Fatalf("Stat(a): %v", err)
+ }
+ ia2, err := Stat("a")
+ if err != nil {
+ t.Fatalf("Stat(a): %v", err)
+ }
+ if !SameFile(ia1, ia2) {
+ t.Errorf("files should be same")
+ }
+
+ ib, err := Stat("b")
+ if err != nil {
+ t.Fatalf("Stat(b): %v", err)
+ }
+ if SameFile(ia1, ib) {
+ t.Errorf("files should be different")
+ }
+}
+
+func TestDevNullFile(t *testing.T) {
+ f, err := Open(DevNull)
+ if err != nil {
+ t.Fatalf("Open(%s): %v", DevNull, err)
+ }
+ defer f.Close()
+ fi, err := f.Stat()
+ if err != nil {
+ t.Fatalf("Stat(%s): %v", DevNull, err)
+ }
+ name := filepath.Base(DevNull)
+ if fi.Name() != name {
+ t.Fatalf("wrong file name have %v want %v", fi.Name(), name)
+ }
+ if fi.Size() != 0 {
+ t.Fatalf("wrong file size have %d want 0", fi.Size())
+ }
+}
+
+var testLargeWrite = flag.Bool("large_write", false, "run TestLargeWriteToConsole test that floods console with output")
+
+func TestLargeWriteToConsole(t *testing.T) {
+ if !*testLargeWrite {
+ t.Skip("skipping console-flooding test; enable with -large_write")
+ }
+ b := make([]byte, 32000)
+ for i := range b {
+ b[i] = '.'
+ }
+ b[len(b)-1] = '\n'
+ n, err := Stdout.Write(b)
+ if err != nil {
+ t.Fatalf("Write to os.Stdout failed: %v", err)
+ }
+ if n != len(b) {
+ t.Errorf("Write to os.Stdout should return %d; got %d", len(b), n)
+ }
+ n, err = Stderr.Write(b)
+ if err != nil {
+ t.Fatalf("Write to os.Stderr failed: %v", err)
+ }
+ if n != len(b) {
+ t.Errorf("Write to os.Stderr should return %d; got %d", len(b), n)
+ }
+}
+
+func TestStatDirModeExec(t *testing.T) {
+ const mode = 0111
+
+ path, err := ioutil.TempDir("", "go-build")
+ if err != nil {
+ t.Fatalf("Failed to create temp directory: %v", err)
+ }
+ defer RemoveAll(path)
+
+ if err := Chmod(path, 0777); err != nil {
+ t.Fatalf("Chmod %q 0777: %v", path, err)
+ }
+
+ dir, err := Stat(path)
+ if err != nil {
+ t.Fatalf("Stat %q (looking for mode %#o): %s", path, mode, err)
+ }
+ if dir.Mode()&mode != mode {
+ t.Errorf("Stat %q: mode %#o want %#o", path, dir.Mode()&mode, mode)
+ }
+}
+
+func TestReadAtEOF(t *testing.T) {
+ f := newFile("TestReadAtEOF", t)
+ defer Remove(f.Name())
+ defer f.Close()
+
+ _, err := f.ReadAt(make([]byte, 10), 0)
+ switch err {
+ case io.EOF:
+ // all good
+ case nil:
+ t.Fatalf("ReadAt succeeded")
+ default:
+ t.Fatalf("ReadAt failed: %s", err)
+ }
+}
+
+func testKillProcess(t *testing.T, processKiller func(p *Process)) {
+ switch runtime.GOOS {
+ case "android", "nacl":
+ t.Skipf("skipping on %s", runtime.GOOS)
+ }
+
+ dir, err := ioutil.TempDir("", "go-build")
+ if err != nil {
+ t.Fatalf("Failed to create temp directory: %v", err)
+ }
+ defer RemoveAll(dir)
+
+ src := filepath.Join(dir, "main.go")
+ f, err := Create(src)
+ if err != nil {
+ t.Fatalf("Failed to create %v: %v", src, err)
+ }
+ st := template.Must(template.New("source").Parse(`
+package main
+import "time"
+func main() {
+ time.Sleep(time.Second)
+}
+`))
+ err = st.Execute(f, nil)
+ if err != nil {
+ f.Close()
+ t.Fatalf("Failed to execute template: %v", err)
+ }
+ f.Close()
+
+ exe := filepath.Join(dir, "main.exe")
+ output, err := osexec.Command("go", "build", "-o", exe, src).CombinedOutput()
+ if err != nil {
+ t.Fatalf("Failed to build exe %v: %v %v", exe, err, string(output))
+ }
+
+ cmd := osexec.Command(exe)
+ err = cmd.Start()
+ if err != nil {
+ t.Fatalf("Failed to start test process: %v", err)
+ }
+ go func() {
+ time.Sleep(100 * time.Millisecond)
+ processKiller(cmd.Process)
+ }()
+ err = cmd.Wait()
+ if err == nil {
+ t.Errorf("Test process succeeded, but expected to fail")
+ }
+}
+
+func TestKillStartProcess(t *testing.T) {
+ testKillProcess(t, func(p *Process) {
+ err := p.Kill()
+ if err != nil {
+ t.Fatalf("Failed to kill test process: %v", err)
+ }
+ })
+}
+
+func TestGetppid(t *testing.T) {
+ switch runtime.GOOS {
+ case "nacl":
+ t.Skip("skipping on nacl")
+ case "plan9":
+ // TODO: golang.org/issue/8206
+ t.Skipf("skipping test on plan9; see issue 8206")
+ }
+
+ if Getenv("GO_WANT_HELPER_PROCESS") == "1" {
+ fmt.Print(Getppid())
+ Exit(0)
+ }
+
+ cmd := osexec.Command(Args[0], "-test.run=TestGetppid")
+ cmd.Env = append(Environ(), "GO_WANT_HELPER_PROCESS=1")
+
+ // verify that Getppid() from the forked process reports our process id
+ output, err := cmd.CombinedOutput()
+ if err != nil {
+ t.Fatalf("Failed to spawn child process: %v %q", err, string(output))
+ }
+
+ childPpid := string(output)
+ ourPid := fmt.Sprintf("%d", Getpid())
+ if childPpid != ourPid {
+ t.Fatalf("Child process reports parent process id '%v', expected '%v'", childPpid, ourPid)
+ }
+}
+
+func TestKillFindProcess(t *testing.T) {
+ testKillProcess(t, func(p *Process) {
+ p2, err := FindProcess(p.Pid)
+ if err != nil {
+ t.Fatalf("Failed to find test process: %v", err)
+ }
+ err = p2.Kill()
+ if err != nil {
+ t.Fatalf("Failed to kill test process: %v", err)
+ }
+ })
+}
+
+var nilFileMethodTests = []struct {
+ name string
+ f func(*File) error
+}{
+ {"Chdir", func(f *File) error { return f.Chdir() }},
+ {"Close", func(f *File) error { return f.Close() }},
+ {"Chmod", func(f *File) error { return f.Chmod(0) }},
+ {"Chown", func(f *File) error { return f.Chown(0, 0) }},
+ {"Read", func(f *File) error { _, err := f.Read(make([]byte, 0)); return err }},
+ {"ReadAt", func(f *File) error { _, err := f.ReadAt(make([]byte, 0), 0); return err }},
+ {"Readdir", func(f *File) error { _, err := f.Readdir(1); return err }},
+ {"Readdirnames", func(f *File) error { _, err := f.Readdirnames(1); return err }},
+ {"Seek", func(f *File) error { _, err := f.Seek(0, 0); return err }},
+ {"Stat", func(f *File) error { _, err := f.Stat(); return err }},
+ {"Sync", func(f *File) error { return f.Sync() }},
+ {"Truncate", func(f *File) error { return f.Truncate(0) }},
+ {"Write", func(f *File) error { _, err := f.Write(make([]byte, 0)); return err }},
+ {"WriteAt", func(f *File) error { _, err := f.WriteAt(make([]byte, 0), 0); return err }},
+ {"WriteString", func(f *File) error { _, err := f.WriteString(""); return err }},
+}
+
+// Test that all File methods give ErrInvalid if the receiver is nil.
+func TestNilFileMethods(t *testing.T) {
+ for _, tt := range nilFileMethodTests {
+ var file *File
+ got := tt.f(file)
+ if got != ErrInvalid {
+ t.Errorf("%v should fail when f is nil; got %v", tt.name, got)
+ }
+ }
+}
+
+func mkdirTree(t *testing.T, root string, level, max int) {
+ if level >= max {
+ return
+ }
+ level++
+ for i := 'a'; i < 'c'; i++ {
+ dir := filepath.Join(root, string(i))
+ if err := Mkdir(dir, 0700); err != nil {
+ t.Fatal(err)
+ }
+ mkdirTree(t, dir, level, max)
+ }
+}
+
+// Test that simultaneous RemoveAll do not report an error.
+// As long as it gets removed, we should be happy.
+func TestRemoveAllRace(t *testing.T) {
+ if runtime.GOOS == "windows" {
+ // Windows has very strict rules about things like
+ // removing directories while someone else has
+ // them open. The racing doesn't work out nicely
+ // like it does on Unix.
+ t.Skip("skipping on windows")
+ }
+
+ n := runtime.GOMAXPROCS(16)
+ defer runtime.GOMAXPROCS(n)
+ root, err := ioutil.TempDir("", "issue")
+ if err != nil {
+ t.Fatal(err)
+ }
+ mkdirTree(t, root, 1, 6)
+ hold := make(chan struct{})
+ var wg sync.WaitGroup
+ for i := 0; i < 4; i++ {
+ wg.Add(1)
+ go func() {
+ defer wg.Done()
+ <-hold
+ err := RemoveAll(root)
+ if err != nil {
+ t.Errorf("unexpected error: %T, %q", err, err)
+ }
+ }()
+ }
+ close(hold) // let workers race to remove root
+ wg.Wait()
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-17 12:24:36 +0000