func TestAccess(t *testing.T) {
if os.Geteuid() == 0 {
t.Log("Skipping TestAccess() as root.")
return
}
tc := NewTestCase(t)
defer tc.Cleanup()
contents := []byte{1, 2, 3}
err := ioutil.WriteFile(tc.origFile, []byte(contents), 0700)
if err != nil {
t.Fatalf("WriteFile failed: %v", err)
}
err = os.Chmod(tc.origFile, 0)
if err != nil {
t.Fatalf("Chmod failed: %v", err)
}
// Ugh - copied from unistd.h
const W_OK uint32 = 2
errCode := syscall.Access(tc.mountFile, W_OK)
if errCode != syscall.EACCES {
t.Errorf("Expected EACCES for non-writable, %v %v", errCode, syscall.EACCES)
}
err = os.Chmod(tc.origFile, 0222)
if err != nil {
t.Fatalf("Chmod failed: %v", err)
}
errCode = syscall.Access(tc.mountFile, W_OK)
if errCode != nil {
t.Errorf("Expected no error code for writable. %v", errCode)
}
}
func TestAccess(t *testing.T) {
if os.Geteuid() == 0 {
t.Log("Skipping TestAccess() as root.")
return
}
me := NewTestCase(t)
defer me.Cleanup()
err := ioutil.WriteFile(me.origFile, []byte(contents), 0700)
CheckSuccess(err)
err = os.Chmod(me.origFile, 0)
CheckSuccess(err)
// Ugh - copied from unistd.h
const W_OK uint32 = 2
errCode := syscall.Access(me.mountFile, W_OK)
if errCode != syscall.EACCES {
t.Errorf("Expected EACCES for non-writable, %v %v", errCode, syscall.EACCES)
}
err = os.Chmod(me.origFile, 0222)
CheckSuccess(err)
errCode = syscall.Access(me.mountFile, W_OK)
if errCode != nil {
t.Errorf("Expected no error code for writable. %v", errCode)
}
}
//初始化文件缓存，配置参数如下
//
// filecache_dir 缓存文件目录
//
// filecache_suffix 缓存文件后缀(.cache)
//
// filecache_level 目录层级(2)
//
// filecache_expire 过期时间(3600秒)
func InitFilecache() (cache.Cache, error) {
if beego.BConfig.RunMode == "dev" {
beego.Info("initiating file cache")
}
filecache_dir := beego.AppConfig.DefaultString("filecache_dir", "")
filecache_suffix := beego.AppConfig.DefaultString("filecache_suffix", ".cache")
filecache_level := beego.AppConfig.DefaultInt("filecache_level", 2)
filecache_expire := beego.AppConfig.DefaultInt("filecache_expire", 3600)
if filecache_dir == "" {
panic("filecache_dir is not set")
}
info, err := os.Stat(filecache_dir)
if err != nil && !os.IsExist(err) {
if err := os.MkdirAll(filecache_dir, 777); err != nil {
panic(fmt.Sprintf("%s not exist and can not be created\n%v", filecache_dir, err))
}
}
if !info.IsDir() {
panic(fmt.Sprintf("%s is not a directory", filecache_dir))
}
if err := syscall.Access(filecache_dir, syscall.O_RDWR); err != nil {
panic(fmt.Sprintf("%s is not accessable\n%v", filecache_dir, err))
}
return cache.NewCache("file", fmt.Sprintf(`{"CachePath":"%s","FileSuffix":"%s","DirectoryLevel":%d,"EmbedExpiry":%d}`, filecache_suffix, filecache_suffix, filecache_level, filecache_expire))
}
func checkArgs() {
flag.Parse()
if *showHelp {
flag.Usage()
os.Exit(0)
}
if flag.NArg() == 0 {
showErrorAndQuit("No input files", -1)
}
// check that args end with the efene suffix and that the files exist
args := flag.Args()
for i := 0; i < flag.NArg(); i++ {
file := args[i]
if *outputType == "erl2ast" {
if !strings.HasSuffix(file, ".erl") {
showErrorAndQuit("Invalid input filename. '"+file+"'", -1)
}
} else if !strings.HasSuffix(file, fnSuffix) {
showErrorAndQuit("Invalid input filename '"+file+"'", -1)
}
fmt.Printf("")
if syscall.Access(file, syscall.O_RDONLY) != 0 {
showErrorAndQuit("Can't read file '"+file+"'", -1)
}
}
}
func isFileExist(path string) bool {
if path == "" {
return false
}
return syscall.Access(path, syscall.F_OK) == nil
}
func access(u U, a []uint64) uint64 {
// TODO: portability
path, _ := u.Mem().ReadStrAt(a[0])
amode := uint32(a[1])
err := syscall.Access(path, amode)
return errno(err)
}
func getProgramPath() (string, os.Error) {
program := os.Args[0]
dir, _ := path.Split(program)
if dir == "" {
binPath, pathError := exec.LookPath(program)
if pathError != nil {
if syscall.Access(program, syscall.O_RDONLY) != 0 {
return "", os.NewError("Path to " + program + " couldn't be found")
}
cwd, cwdError := os.Getwd()
if cwdError != nil {
return "", cwdError
}
return cwd, nil
}
binPath, _ = path.Split(binPath)
return binPath, nil
}
dir, _ = abspath(dir)
return dir, nil
}
// Init initialises the srvlog package. if either consoleLog or fileLog
// is true it will start the logger in another gorutine ready to log
func Init(consolLog, fileLog bool, maxLogDays int, pathToLogDir string) {
logToConsol = consolLog
logToFile = fileLog
logDir = pathToLogDir
maxDays = maxLogDays
if logToFile {
// make sure log directory exists
info, err := os.Stat(logDir)
if err != nil {
if os.IsNotExist(err) {
log.Fatalln("The directory specified to serverlog does not exist.")
}
log.Fatalln(err)
}
if !info.IsDir() {
log.Fatalln("The path specified to serverlog is not a directory.")
}
// make sure have premissions to log directory
err = syscall.Access(logDir, syscall.O_RDWR)
if err != nil {
log.Fatalln("Serverlog needs read and write premissions to the specified directory.")
}
// manage logfile names and number of logfiles at any one time
// only needed if logging to files
go logFileOverseer()
}
go listen()
}
// Checks whether the file can be considered a match according to given options
// Existing option requires the file to exist
// Symlink option allows the file to be a symlink
func fileOkay(path string, options *Options) (bool, error) {
var fi syscall.Stat_t
err := syscall.Lstat(path, &fi)
if err != nil && err != syscall.ENOENT {
return false, err
}
if options.Existing && (err == syscall.ENOENT) {
return false, nil
} // Drop dead files...
if options.Accessable { // FIXME(utkan): No R_OK(=4) in syscall package!
err = syscall.Access(path, 4)
if err != nil {
return false, nil
}
}
issym := fi.Mode&syscall.S_IFLNK == syscall.S_IFLNK
if options.Symlink == false && issym {
return false, nil
} // ...and symlinks, if necessary.
return true, nil
}
func (constor *Constor) Access(input *fuse.AccessIn) (code fuse.Status) {
constor.log("%d", input.NodeId)
// FIXME: oops fix this
path, err := constor.getPath(input.NodeId)
if err != nil {
return fuse.ToStatus(err)
}
return fuse.ToStatus(syscall.Access(path, input.Mask))
}
// IsExist check if target is exist in fs or not
func IsExist(path string) bool {
if path == "" {
return false
}
path = PATH.Clean(path)
return syscall.Access(path, syscall.F_OK) == nil
}
func (fs *FS) Access(path string, mode uint32, context *fuse.Context) (code fuse.Status) {
if fs.isFiltered(path) {
return fuse.EPERM
}
cPath, err := fs.getBackingPath(path)
if err != nil {
return fuse.ToStatus(err)
}
return fuse.ToStatus(syscall.Access(cPath, mode))
}
// 判断一个文件或目录是否有写入权限
func IsWritable(path string) (bool, error) {
err := syscall.Access(path, syscall.O_RDWR)
if err == nil {
return true, nil
}
// Check if error is "no such file or directory"
if _, ok := err.(*os.PathError); ok {
return false, nil
}
return false, err
}
// Which find full path to some app
func Which(name string) string {
paths := Get().Path()
for _, path := range paths {
if syscall.Access(path+"/"+name, syscall.F_OK) == nil {
return path + "/" + name
}
}
return ""
}
func (me *testCase) testAccess() {
me.writeOrigFile()
err := os.Chmod(me.origFile, 0)
CheckSuccess(err)
// Ugh - copied from unistd.h
const W_OK uint32 = 2
errCode := syscall.Access(me.mountFile, W_OK)
if errCode != syscall.EACCES {
me.tester.Errorf("Expected EACCES for non-writable, %v %v", errCode, syscall.EACCES)
}
err = os.Chmod(me.origFile, 0222)
CheckSuccess(err)
errCode = syscall.Access(me.mountFile, W_OK)
if errCode != 0 {
me.tester.Errorf("Expected no error code for writable. %v", errCode)
}
me.removeMountFile()
me.removeMountFile()
}
// Access - FUSE call
func (rfs *ReverseFS) Access(relPath string, mode uint32, context *fuse.Context) fuse.Status {
if rfs.isTranslatedConfig(relPath) {
return fuse.OK
}
if rfs.isDirIV(relPath) {
return fuse.OK
}
absPath, err := rfs.abs(rfs.decryptPath(relPath))
if err != nil {
return fuse.ToStatus(err)
}
return fuse.ToStatus(syscall.Access(absPath, mode))
}
func findSafeTempDir() {
var candidates []string
err := processLines("/proc/mounts", func(line string) error {
fields := strings.Fields(line)
if len(fields) < 1 {
return nil
}
path := fields[1]
filesystem := fields[2]
if filesystem == "tmpfs" &&
syscall.Access(path, 7 /* rwx ok */) == nil {
candidates = append(candidates, path)
}
return nil
})
if err == nil && len(candidates) == 0 {
err = errors.New("no writable tmpfs directories found")
}
if err != nil {
safeTempDirErr = errors.New("system: while checking /proc/mounts: " + err.Error())
return
}
suggested := os.TempDir()
preferred := []string{suggested}
var otherOptions []string
if dir := os.Getenv("XDG_RUNTIME_DIR"); len(dir) > 0 {
otherOptions = append(otherOptions, dir)
}
otherOptions = append(otherOptions, "/tmp", "/var/tmp")
for _, d := range otherOptions {
if suggested != d {
preferred = append(preferred, d)
}
}
for _, d := range preferred {
for _, candidate := range candidates {
if candidate == d {
safeTempDir = candidate
return
}
}
}
safeTempDir = candidates[0]
}
func TestUnionFsWriteAccess(t *testing.T) {
wd, clean := setupUfs(t)
defer clean()
fn := wd + "/ro/file"
// No write perms.
err := ioutil.WriteFile(fn, []byte("foo"), 0444)
CheckSuccess(err)
freezeRo(wd + "/ro")
err = syscall.Access(wd+"/mnt/file", fuse.W_OK)
if err != nil {
CheckSuccess(err)
}
}
func findSafeTempDir() {
var candidates []string
err := processMountOutput(func(line string) error {
fields := strings.Fields(line)
if len(fields) < 1 {
return nil
}
path := fields[2]
filesystem := fields[4]
if filesystem == "tmpfs" &&
syscall.Access(path, 2 /* write ok */) == nil {
candidates = append(candidates, path)
}
return nil
})
if err == nil && len(candidates) == 0 {
err = errors.New("system: no writable tmpfs directories found")
}
if err != nil {
safeTempDirErr = errors.New("system: while checking mount output: " + err.Error())
return
}
suggested := os.TempDir()
preferred := []string{suggested}
var otherOptions []string
otherOptions = append(otherOptions, "/tmp")
for _, d := range otherOptions {
if suggested != d {
preferred = append(preferred, d)
}
}
for _, d := range preferred {
for _, candidate := range candidates {
if candidate == d {
safeTempDir = candidate
return
}
}
}
safeTempDir = candidates[0]
}
func TestWriteAccess(t *testing.T) {
t.Log("TestWriteAccess")
wd, clean := setupUfs(t)
defer clean()
fn := wd + "/ro/file"
// No write perms.
err := ioutil.WriteFile(fn, []byte("foo"), 0444)
CheckSuccess(err)
errno := syscall.Access(wd+"/mount/file", fuse.W_OK)
if errno != 0 {
err = os.Errno(errno)
CheckSuccess(err)
}
}
func findSafeTempDir() {
var candidates []string
err := processFilesystems(func(fstype, path string) error {
if fstype == "tmpfs" &&
syscall.Access(path, 7 /* write ok */) == nil {
candidates = append(candidates, path)
}
return nil
})
if err == nil && len(candidates) == 0 {
err = errors.New("no writable tmpfs directories found")
}
if err != nil {
safeTempDirErr = errors.New("system: while checking filesystems: " + err.Error())
return
}
suggested := os.TempDir()
preferred := []string{suggested}
var otherOptions []string
if dir := os.Getenv("XDG_RUNTIME_DIR"); len(dir) > 0 {
otherOptions = append(otherOptions, dir)
}
otherOptions = append(otherOptions, "/tmp", "/var/tmp")
for _, d := range otherOptions {
if suggested != d {
preferred = append(preferred, d)
}
}
for _, d := range preferred {
for _, candidate := range candidates {
if candidate == d {
safeTempDir = candidate
return
}
}
}
safeTempDir = candidates[0]
}
func (config *backupConfig) isDstWritable() error {
var err error
fi, err := os.Stat(config.Dst)
if err != nil {
return err
}
if !fi.IsDir() {
return fmt.Errorf("config.Dst is not directory. dir=%s", config.Dst)
}
err = syscall.Access(config.Dst, _W_OK)
if err != nil {
return err
}
return nil
}
func TestUnionFsWriteAccess(t *testing.T) {
wd, clean := setupUfs(t)
defer clean()
fn := wd + "/ro/file"
// No write perms.
err := ioutil.WriteFile(fn, []byte("foo"), 0444)
if err != nil {
t.Fatalf("WriteFile failed: %v", err)
}
setRecursiveWritable(t, wd+"/ro", false)
err = syscall.Access(wd+"/mnt/file", raw.W_OK)
if err != nil {
if err != nil {
t.Fatalf("Access failed: %v", err)
}
}
}
// NewDB reads filenames in given databases and stores the union in a newly created DB.
// If everything goes fine, new DB is returned.
func NewDB(dbFilenames []string, options *Options) (db *DB, err error) {
db = &DB{dbFilenames: dbFilenames}
db.options = *options
db.options.Root = filepath.Clean(db.options.Root)
if db.options.Root == "" {
db.options.Root = "/"
}
// BUG(utkan): Accessable option should not require RO access to _all_ DB files.
if db.options.Accessable { // FIXME(utkan): No R_OK(=4) in syscall package!
for _, dbFilename := range dbFilenames {
if syscall.Access(dbFilename, 4) != nil {
db.options.Accessable = false
break
}
}
}
err = db.readDBs()
if err != nil {
return nil, err
}
if db.options.HashMap {
err = db.bakeBasenames()
if err != nil {
return db, err
}
/*go func() {
err = db.bakeBasenames()
if err != nil {
db.options.HashMap = false
}
}()*/
}
return db, nil
}
func InitContainer() error {
var err error
err = os.MkdirAll(runc_root, 0700)
if err != nil {
return err
}
err = syscall.Access(runc_root, 0x7)
if err != nil {
return err
}
factory, err = createFactory()
if err != nil {
return err
}
master_config, err = loadConfig(fconf)
if err != nil {
return err
}
use_container = true
return nil
}
func (fs *LoopbackFileSystem) Access(name string, mode uint32, context *Context) (code Status) {
return ToStatus(syscall.Access(fs.GetPath(name), mode))
}
func isExecutable(path string) bool {
return syscall.Access(path, X_OK) == nil
}
func (fs *loopbackFileSystem) Access(name string, mode uint32, context *fuse.Context) (code fuse.Status) {
return fuse.ToStatus(syscall.Access(fs.GetPath(name), mode))
}
func IsWritableDir(dir string) bool {
return syscall.Access(dir, unix.W_OK) == nil
}
func isWritable(path string) bool {
return syscall.Access(path, 2) == nil
}
