kubernetes/vendor/go.etcd.io/etcd/client/pkg/v3/fileutil/fileutil.go

const PrivateFileMode …

// IsDirWriteable checks if dir is writable by writing and removing a file
// to dir. It returns nil if dir is writable.
func IsDirWriteable(dir string) error { … }

// TouchDirAll is similar to os.MkdirAll. It creates directories with 0700 permission if any directory
// does not exists. TouchDirAll also ensures the given directory is writable.
func TouchDirAll(lg *zap.Logger, dir string) error { … }

// CreateDirAll is similar to TouchDirAll but returns error
// if the deepest directory was not empty.
func CreateDirAll(lg *zap.Logger, dir string) error { … }

// Exist returns true if a file or directory exists.
func Exist(name string) bool { … }

// DirEmpty returns true if a directory empty and can access.
func DirEmpty(name string) bool { … }

// ZeroToEnd zeros a file starting from SEEK_CUR to its SEEK_END. May temporarily
// shorten the length of the file.
func ZeroToEnd(f *os.File) error { … }

// CheckDirPermission checks permission on an existing dir.
// Returns error if dir is empty or exist with a different permission than specified.
func CheckDirPermission(dir string, perm os.FileMode) error { … }

// RemoveMatchFile deletes file if matchFunc is true on an existing dir
// Returns error if the dir does not exist or remove file fail
func RemoveMatchFile(lg *zap.Logger, dir string, matchFunc func(fileName string) bool) error { … }