ActiveGo 1.8Package fileutil
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Constants
const (
// PrivateFileMode grants owner to read/write a file.
PrivateFileMode = 0600
// PrivateDirMode grants owner to make/remove files inside the directory.
PrivateDirMode = 0700
)
Variables
var (
ErrLocked = errors.New("fileutil: file already locked")
)
func CreateDirAll ¶
func CreateDirAll(dir string) error
CreateDirAll is similar to TouchDirAll but returns error if the deepest directory was not empty.
func Exist ¶
func Exist(name string) bool
func Fdatasync ¶
func Fdatasync(f *os.File) error
Fdatasync on darwin platform invokes fcntl(F_FULLFSYNC) for actual persistence on physical drive media.
func Fsync ¶
func Fsync(f *os.File) error
Fsync on HFS/OSX flushes the data on to the physical drive but the drive may not write it to the persistent media for quite sometime and it may be written in out-of-order sequence. Using F_FULLFSYNC ensures that the physical drive's buffer will also get flushed to the media.
func IsDirWriteable ¶
func IsDirWriteable(dir string) error
IsDirWriteable checks if dir is writable by writing and removing a file to dir. It returns nil if dir is writable.
func OpenDir ¶
func OpenDir(path string) (*os.File, error)
OpenDir opens a directory for syncing.
func Preallocate ¶
func Preallocate(f *os.File, sizeInBytes int64, extendFile bool) error
Preallocate tries to allocate the space for given file. This operation is only supported on linux by a few filesystems (btrfs, ext4, etc.). If the operation is unsupported, no error will be returned. Otherwise, the error encountered will be returned.
func PurgeFile ¶
func PurgeFile(dirname string, suffix string, max uint, interval time.Duration, stop <-chan struct{}) <-chan error
func ReadDir ¶
func ReadDir(dirpath string) ([]string, error)
ReadDir returns the filenames in the given directory in sorted order.
func TouchDirAll ¶
func TouchDirAll(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 ZeroToEnd ¶
func ZeroToEnd(f *os.File) error
ZeroToEnd zeros a file starting from SEEK_CUR to its SEEK_END. May temporarily shorten the length of the file.
type LockedFile ¶
type LockedFile struct{ *os.File }
func LockFile ¶
func LockFile(path string, flag int, perm os.FileMode) (*LockedFile, error)
func TryLockFile ¶
func TryLockFile(path string, flag int, perm os.FileMode) (*LockedFile, error)