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// 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.
// +build darwin dragonfly freebsd linux netbsd openbsd solaris
package os_test
import (
"io"
"io/ioutil"
. "os"
"path/filepath"
"runtime"
"strings"
"syscall"
"testing"
)
func init() {
isReadonlyError = func(err error) bool { return err == syscall.EROFS }
}
func checkUidGid(t *testing.T, path string, uid, gid int) {
dir, err := Lstat(path)
if err != nil {
t.Fatalf("Lstat %q (looking for uid/gid %d/%d): %s", path, uid, gid, err)
}
sys := dir.Sys().(*syscall.Stat_t)
if int(sys.Uid) != uid {
t.Errorf("Lstat %q: uid %d want %d", path, sys.Uid, uid)
}
if int(sys.Gid) != gid {
t.Errorf("Lstat %q: gid %d want %d", path, sys.Gid, gid)
}
}
func TestChown(t *testing.T) {
// Use TempDir() to make sure we're on a local file system,
// so that the group ids returned by Getgroups will be allowed
// on the file. On NFS, the Getgroups groups are
// basically useless.
f := newFile("TestChown", t)
defer Remove(f.Name())
defer f.Close()
dir, err := f.Stat()
if err != nil {
t.Fatalf("stat %s: %s", f.Name(), err)
}
// Can't change uid unless root, but can try
// changing the group id. First try our current group.
gid := Getgid()
t.Log("gid:", gid)
if err = Chown(f.Name(), -1, gid); err != nil {
t.Fatalf("chown %s -1 %d: %s", f.Name(), gid, err)
}
sys := dir.Sys().(*syscall.Stat_t)
checkUidGid(t, f.Name(), int(sys.Uid), gid)
// Then try all the auxiliary groups.
groups, err := Getgroups()
if err != nil {
t.Fatalf("getgroups: %s", err)
}
t.Log("groups: ", groups)
for _, g := range groups {
if err = Chown(f.Name(), -1, g); err != nil {
t.Fatalf("chown %s -1 %d: %s", f.Name(), g, err)
}
checkUidGid(t, f.Name(), int(sys.Uid), g)
// change back to gid to test fd.Chown
if err = f.Chown(-1, gid); err != nil {
t.Fatalf("fchown %s -1 %d: %s", f.Name(), gid, err)
}
checkUidGid(t, f.Name(), int(sys.Uid), gid)
}
}
func TestFileChown(t *testing.T) {
// Use TempDir() to make sure we're on a local file system,
// so that the group ids returned by Getgroups will be allowed
// on the file. On NFS, the Getgroups groups are
// basically useless.
f := newFile("TestFileChown", t)
defer Remove(f.Name())
defer f.Close()
dir, err := f.Stat()
if err != nil {
t.Fatalf("stat %s: %s", f.Name(), err)
}
// Can't change uid unless root, but can try
// changing the group id. First try our current group.
gid := Getgid()
t.Log("gid:", gid)
if err = f.Chown(-1, gid); err != nil {
t.Fatalf("fchown %s -1 %d: %s", f.Name(), gid, err)
}
sys := dir.Sys().(*syscall.Stat_t)
checkUidGid(t, f.Name(), int(sys.Uid), gid)
// Then try all the auxiliary groups.
groups, err := Getgroups()
if err != nil {
t.Fatalf("getgroups: %s", err)
}
t.Log("groups: ", groups)
for _, g := range groups {
if err = f.Chown(-1, g); err != nil {
t.Fatalf("fchown %s -1 %d: %s", f.Name(), g, err)
}
checkUidGid(t, f.Name(), int(sys.Uid), g)
// change back to gid to test fd.Chown
if err = f.Chown(-1, gid); err != nil {
t.Fatalf("fchown %s -1 %d: %s", f.Name(), gid, err)
}
checkUidGid(t, f.Name(), int(sys.Uid), gid)
}
}
func TestLchown(t *testing.T) {
// Use TempDir() to make sure we're on a local file system,
// so that the group ids returned by Getgroups will be allowed
// on the file. On NFS, the Getgroups groups are
// basically useless.
f := newFile("TestLchown", t)
defer Remove(f.Name())
defer f.Close()
dir, err := f.Stat()
if err != nil {
t.Fatalf("stat %s: %s", f.Name(), err)
}
linkname := f.Name() + "2"
if err := Symlink(f.Name(), linkname); err != nil {
if runtime.GOOS == "android" && IsPermission(err) {
t.Skip("skipping test on Android; permission error creating symlink")
}
t.Fatalf("link %s -> %s: %v", f.Name(), linkname, err)
}
defer Remove(linkname)
// Can't change uid unless root, but can try
// changing the group id. First try our current group.
gid := Getgid()
t.Log("gid:", gid)
if err = Lchown(linkname, -1, gid); err != nil {
t.Fatalf("lchown %s -1 %d: %s", linkname, gid, err)
}
sys := dir.Sys().(*syscall.Stat_t)
checkUidGid(t, linkname, int(sys.Uid), gid)
// Then try all the auxiliary groups.
groups, err := Getgroups()
if err != nil {
t.Fatalf("getgroups: %s", err)
}
t.Log("groups: ", groups)
for _, g := range groups {
if err = Lchown(linkname, -1, g); err != nil {
t.Fatalf("lchown %s -1 %d: %s", linkname, g, err)
}
checkUidGid(t, linkname, int(sys.Uid), g)
// Check that link target's gid is unchanged.
checkUidGid(t, f.Name(), int(sys.Uid), int(sys.Gid))
}
}
// Issue 16919: Readdir must return a non-empty slice or an error.
func TestReaddirRemoveRace(t *testing.T) {
oldStat := *LstatP
defer func() { *LstatP = oldStat }()
*LstatP = func(name string) (FileInfo, error) {
if strings.HasSuffix(name, "some-file") {
// Act like it's been deleted.
return nil, ErrNotExist
}
return oldStat(name)
}
dir := newDir("TestReaddirRemoveRace", t)
defer RemoveAll(dir)
if err := ioutil.WriteFile(filepath.Join(dir, "some-file"), []byte("hello"), 0644); err != nil {
t.Fatal(err)
}
d, err := Open(dir)
if err != nil {
t.Fatal(err)
}
defer d.Close()
fis, err := d.Readdir(2) // notably, greater than zero
if len(fis) == 0 && err == nil {
// This is what used to happen (Issue 16919)
t.Fatal("Readdir = empty slice & err == nil")
}
if len(fis) != 0 || err != io.EOF {
t.Errorf("Readdir = %d entries: %v; want 0, io.EOF", len(fis), err)
for i, fi := range fis {
t.Errorf(" entry[%d]: %q, %v", i, fi.Name(), fi.Mode())
}
t.FailNow()
}
}
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