Preview: removeall_test.go
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/proc/thread-self/root/opt/golang/1.22.0/src/os/removeall_test.go
// Copyright 2018 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"
"fmt"
"internal/testenv"
. "os"
"path/filepath"
"runtime"
"strconv"
"strings"
"testing"
)
func TestRemoveAll(t *testing.T) {
t.Parallel()
tmpDir := t.TempDir()
if err := RemoveAll(""); err != nil {
t.Errorf("RemoveAll(\"\"): %v; want nil", err)
}
file := filepath.Join(tmpDir, "file")
path := filepath.Join(tmpDir, "_TestRemoveAll_")
fpath := filepath.Join(path, "file")
dpath := filepath.Join(path, "dir")
// Make a regular file and remove
fd, err := Create(file)
if err != nil {
t.Fatalf("create %q: %s", file, err)
}
fd.Close()
if err = RemoveAll(file); err != nil {
t.Fatalf("RemoveAll %q (first): %s", file, err)
}
if _, err = Lstat(file); err == nil {
t.Fatalf("Lstat %q succeeded after RemoveAll (first)", file)
}
// Make directory with 1 file and remove.
if err := MkdirAll(path, 0777); err != nil {
t.Fatalf("MkdirAll %q: %s", path, err)
}
fd, err = Create(fpath)
if err != nil {
t.Fatalf("create %q: %s", fpath, err)
}
fd.Close()
if err = RemoveAll(path); err != nil {
t.Fatalf("RemoveAll %q (second): %s", path, err)
}
if _, err = Lstat(path); err == nil {
t.Fatalf("Lstat %q succeeded after RemoveAll (second)", path)
}
// Make directory with file and subdirectory and remove.
if err = MkdirAll(dpath, 0777); err != nil {
t.Fatalf("MkdirAll %q: %s", dpath, err)
}
fd, err = Create(fpath)
if err != nil {
t.Fatalf("create %q: %s", fpath, err)
}
fd.Close()
fd, err = Create(dpath + "/file")
if err != nil {
t.Fatalf("create %q: %s", fpath, err)
}
fd.Close()
if err = RemoveAll(path); err != nil {
t.Fatalf("RemoveAll %q (third): %s", path, err)
}
if _, err := Lstat(path); err == nil {
t.Fatalf("Lstat %q succeeded after RemoveAll (third)", path)
}
// Chmod is not supported under Windows or wasip1 and test fails as root.
if runtime.GOOS != "windows" && runtime.GOOS != "wasip1" && Getuid() != 0 {
// Make directory with file and subdirectory and trigger error.
if err = MkdirAll(dpath, 0777); err != nil {
t.Fatalf("MkdirAll %q: %s", dpath, err)
}
for _, s := range []string{fpath, dpath + "/file1", path + "/zzz"} {
fd, err = Create(s)
if err != nil {
t.Fatalf("create %q: %s", s, err)
}
fd.Close()
}
if err = Chmod(dpath, 0); err != nil {
t.Fatalf("Chmod %q 0: %s", dpath, err)
}
// No error checking here: either RemoveAll
// will or won't be able to remove dpath;
// either way we want to see if it removes fpath
// and path/zzz. Reasons why RemoveAll might
// succeed in removing dpath as well include:
// * running as root
// * running on a file system without permissions (FAT)
RemoveAll(path)
Chmod(dpath, 0777)
for _, s := range []string{fpath, path + "/zzz"} {
if _, err = Lstat(s); err == nil {
t.Fatalf("Lstat %q succeeded after partial RemoveAll", s)
}
}
}
if err = RemoveAll(path); err != nil {
t.Fatalf("RemoveAll %q after partial RemoveAll: %s", path, err)
}
if _, err = Lstat(path); err == nil {
t.Fatalf("Lstat %q succeeded after RemoveAll (final)", path)
}
}
// Test RemoveAll on a large directory.
func TestRemoveAllLarge(t *testing.T) {
if testing.Short() {
t.Skip("skipping in short mode")
}
t.Parallel()
tmpDir := t.TempDir()
path := filepath.Join(tmpDir, "_TestRemoveAllLarge_")
// Make directory with 1000 files and remove.
if err := MkdirAll(path, 0777); err != nil {
t.Fatalf("MkdirAll %q: %s", path, err)
}
for i := 0; i < 1000; i++ {
fpath := fmt.Sprintf("%s/file%d", path, i)
fd, err := Create(fpath)
if err != nil {
t.Fatalf("create %q: %s", fpath, err)
}
fd.Close()
}
if err := RemoveAll(path); err != nil {
t.Fatalf("RemoveAll %q: %s", path, err)
}
if _, err := Lstat(path); err == nil {
t.Fatalf("Lstat %q succeeded after RemoveAll", path)
}
}
func TestRemoveAllLongPath(t *testing.T) {
switch runtime.GOOS {
case "aix", "darwin", "ios", "dragonfly", "freebsd", "linux", "netbsd", "openbsd", "illumos", "solaris":
break
default:
t.Skip("skipping for not implemented platforms")
}
prevDir, err := Getwd()
if err != nil {
t.Fatalf("Could not get wd: %s", err)
}
startPath, err := MkdirTemp("", "TestRemoveAllLongPath-")
if err != nil {
t.Fatalf("Could not create TempDir: %s", err)
}
defer RemoveAll(startPath)
err = Chdir(startPath)
if err != nil {
t.Fatalf("Could not chdir %s: %s", startPath, err)
}
// Removing paths with over 4096 chars commonly fails
for i := 0; i < 41; i++ {
name := strings.Repeat("a", 100)
err = Mkdir(name, 0755)
if err != nil {
t.Fatalf("Could not mkdir %s: %s", name, err)
}
err = Chdir(name)
if err != nil {
t.Fatalf("Could not chdir %s: %s", name, err)
}
}
err = Chdir(prevDir)
if err != nil {
t.Fatalf("Could not chdir %s: %s", prevDir, err)
}
err = RemoveAll(startPath)
if err != nil {
t.Errorf("RemoveAll could not remove long file path %s: %s", startPath, err)
}
}
func TestRemoveAllDot(t *testing.T) {
prevDir, err := Getwd()
if err != nil {
t.Fatalf("Could not get wd: %s", err)
}
tempDir, err := MkdirTemp("", "TestRemoveAllDot-")
if err != nil {
t.Fatalf("Could not create TempDir: %s", err)
}
defer RemoveAll(tempDir)
err = Chdir(tempDir)
if err != nil {
t.Fatalf("Could not chdir to tempdir: %s", err)
}
err = RemoveAll(".")
if err == nil {
t.Errorf("RemoveAll succeed to remove .")
}
err = Chdir(prevDir)
if err != nil {
t.Fatalf("Could not chdir %s: %s", prevDir, err)
}
}
func TestRemoveAllDotDot(t *testing.T) {
t.Parallel()
tempDir := t.TempDir()
subdir := filepath.Join(tempDir, "x")
subsubdir := filepath.Join(subdir, "y")
if err := MkdirAll(subsubdir, 0777); err != nil {
t.Fatal(err)
}
if err := RemoveAll(filepath.Join(subsubdir, "..")); err != nil {
t.Error(err)
}
for _, dir := range []string{subsubdir, subdir} {
if _, err := Stat(dir); err == nil {
t.Errorf("%s: exists after RemoveAll", dir)
}
}
}
// Issue #29178.
func TestRemoveReadOnlyDir(t *testing.T) {
t.Parallel()
tempDir := t.TempDir()
subdir := filepath.Join(tempDir, "x")
if err := Mkdir(subdir, 0); err != nil {
t.Fatal(err)
}
// If an error occurs make it more likely that removing the
// temporary directory will succeed.
defer Chmod(subdir, 0777)
if err := RemoveAll(subdir); err != nil {
t.Fatal(err)
}
if _, err := Stat(subdir); err == nil {
t.Error("subdirectory was not removed")
}
}
// Issue #29983.
func TestRemoveAllButReadOnlyAndPathError(t *testing.T) {
switch runtime.GOOS {
case "js", "wasip1", "windows":
t.Skipf("skipping test on %s", runtime.GOOS)
}
if Getuid() == 0 {
t.Skip("skipping test when running as root")
}
t.Parallel()
tempDir := t.TempDir()
dirs := []string{
"a",
"a/x",
"a/x/1",
"b",
"b/y",
"b/y/2",
"c",
"c/z",
"c/z/3",
}
readonly := []string{
"b",
}
inReadonly := func(d string) bool {
for _, ro := range readonly {
if d == ro {
return true
}
dd, _ := filepath.Split(d)
if filepath.Clean(dd) == ro {
return true
}
}
return false
}
for _, dir := range dirs {
if err := Mkdir(filepath.Join(tempDir, dir), 0777); err != nil {
t.Fatal(err)
}
}
for _, dir := range readonly {
d := filepath.Join(tempDir, dir)
if err := Chmod(d, 0555); err != nil {
t.Fatal(err)
}
// Defer changing the mode back so that the deferred
// RemoveAll(tempDir) can succeed.
defer Chmod(d, 0777)
}
err := RemoveAll(tempDir)
if err == nil {
t.Fatal("RemoveAll succeeded unexpectedly")
}
// The error should be of type *PathError.
// see issue 30491 for details.
if pathErr, ok := err.(*PathError); ok {
want := filepath.Join(tempDir, "b", "y")
if pathErr.Path != want {
t.Errorf("RemoveAll(%q): err.Path=%q, want %q", tempDir, pathErr.Path, want)
}
} else {
t.Errorf("RemoveAll(%q): error has type %T, want *fs.PathError", tempDir, err)
}
for _, dir := range dirs {
_, err := Stat(filepath.Join(tempDir, dir))
if inReadonly(dir) {
if err != nil {
t.Errorf("file %q was deleted but should still exist", dir)
}
} else {
if err == nil {
t.Errorf("file %q still exists but should have been deleted", dir)
}
}
}
}
func TestRemoveUnreadableDir(t *testing.T) {
switch runtime.GOOS {
case "js":
t.Skipf("skipping test on %s", runtime.GOOS)
}
if Getuid() == 0 {
t.Skip("skipping test when running as root")
}
t.Parallel()
tempDir := t.TempDir()
target := filepath.Join(tempDir, "d0", "d1", "d2")
if err := MkdirAll(target, 0755); err != nil {
t.Fatal(err)
}
if err := Chmod(target, 0300); err != nil {
t.Fatal(err)
}
if err := RemoveAll(filepath.Join(tempDir, "d0")); err != nil {
t.Fatal(err)
}
}
// Issue 29921
func TestRemoveAllWithMoreErrorThanReqSize(t *testing.T) {
if testing.Short() {
t.Skip("skipping in short mode")
}
t.Parallel()
tmpDir := t.TempDir()
path := filepath.Join(tmpDir, "_TestRemoveAllWithMoreErrorThanReqSize_")
// Make directory with 1025 read-only files.
if err := MkdirAll(path, 0777); err != nil {
t.Fatalf("MkdirAll %q: %s", path, err)
}
for i := 0; i < 1025; i++ {
fpath := filepath.Join(path, fmt.Sprintf("file%d", i))
fd, err := Create(fpath)
if err != nil {
t.Fatalf("create %q: %s", fpath, err)
}
fd.Close()
}
// Make the parent directory read-only. On some platforms, this is what
// prevents Remove from removing the files within that directory.
if err := Chmod(path, 0555); err != nil {
t.Fatal(err)
}
defer Chmod(path, 0755)
// This call should not hang, even on a platform that disallows file deletion
// from read-only directories.
err := RemoveAll(path)
if Getuid() == 0 {
// On many platforms, root can remove files from read-only directories.
return
}
if err == nil {
if runtime.GOOS == "windows" || runtime.GOOS == "wasip1" {
// Marking a directory as read-only in Windows does not prevent the RemoveAll
// from creating or removing files within it.
//
// For wasip1, there is no support for file permissions so we cannot prevent
// RemoveAll from removing the files.
return
}
t.Fatal("RemoveAll(<read-only directory>) = nil; want error")
}
dir, err := Open(path)
if err != nil {
t.Fatal(err)
}
defer dir.Close()
names, _ := dir.Readdirnames(1025)
if len(names) < 1025 {
t.Fatalf("RemoveAll(<read-only directory>) unexpectedly removed %d read-only files from that directory", 1025-len(names))
}
}
func TestRemoveAllNoFcntl(t *testing.T) {
if testing.Short() {
t.Skip("skipping in short mode")
}
const env = "GO_TEST_REMOVE_ALL_NO_FCNTL"
if dir := Getenv(env); dir != "" {
if err := RemoveAll(dir); err != nil {
t.Fatal(err)
}
return
}
// Only test on Linux so that we can assume we have strace.
// The code is OS-independent so if it passes on Linux
// it should pass on other Unix systems.
if runtime.GOOS != "linux" {
t.Skipf("skipping test on %s", runtime.GOOS)
}
if _, err := Stat("/bin/strace"); err != nil {
t.Skipf("skipping test because /bin/strace not found: %v", err)
}
me, err := Executable()
if err != nil {
t.Skipf("skipping because Executable failed: %v", err)
}
// Create 100 directories.
// The test is that we can remove them without calling fcntl
// on each one.
tmpdir := t.TempDir()
subdir := filepath.Join(tmpdir, "subdir")
if err := Mkdir(subdir, 0o755); err != nil {
t.Fatal(err)
}
for i := 0; i < 100; i++ {
subsubdir := filepath.Join(subdir, strconv.Itoa(i))
if err := Mkdir(filepath.Join(subdir, strconv.Itoa(i)), 0o755); err != nil {
t.Fatal(err)
}
if err := WriteFile(filepath.Join(subsubdir, "file"), nil, 0o644); err != nil {
t.Fatal(err)
}
}
cmd := testenv.Command(t, "/bin/strace", "-f", "-e", "fcntl", me, "-test.run=^TestRemoveAllNoFcntl$")
cmd = testenv.CleanCmdEnv(cmd)
cmd.Env = append(cmd.Env, env+"="+subdir)
out, err := cmd.CombinedOutput()
if len(out) > 0 {
t.Logf("%s", out)
}
if err != nil {
t.Fatal(err)
}
if got := bytes.Count(out, []byte("fcntl")); got >= 100 {
t.Errorf("found %d fcntl calls, want < 100", got)
}
}
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