Golang Fwstat Examples

Example #1

// Truncate changes the size of the file.
// It does not change the I/O offset.
func (f *File) Truncate(size int64) error {
	var d Dir
	d.Null()

	d.Length = uint64(size)

	if e := syscall.Fwstat(f.fd, pdir(nil, &d)); e != nil {
		return &PathError{"truncate", f.name, e}
	}
	return nil
}

Example #2

File: file_plan9.go Project: go-nosql/golang

// Chmod changes the mode of the file to mode.
func (f *File) Chmod(mode uint32) Error {
	var d Dir
	d.Null()

	d.Mode = mode & 0777

	if e := syscall.Fwstat(f.fd, pdir(nil, &d)); iserror(e) {
		return &PathError{"chmod", f.name, e}
	}
	return nil
}

Example #3

// Sync commits the current contents of the file to stable storage.
// Typically, this means flushing the file system's in-memory copy
// of recently written data to disk.
func (f *File) Sync() (err error) {
	if f == nil {
		return EINVAL
	}

	var d Dir
	d.Null()

	if e := syscall.Fwstat(f.fd, pdir(nil, &d)); e != nil {
		return NewSyscallError("fsync", e)
	}
	return nil
}

Example #4

// Chmod changes the mode of the file to mode.
func (f *File) Chmod(mode FileMode) error {
	var d Dir

	odir, e := dirstat(f)
	if e != nil {
		return &PathError{"chmod", f.name, e}
	}
	d.Null()
	d.Mode = odir.Mode&^chmodMask | syscallMode(mode)&chmodMask
	if e := syscall.Fwstat(f.fd, pdir(nil, &d)); e != nil {
		return &PathError{"chmod", f.name, e}
	}
	return nil
}

Example #5

File: file_plan9.go Project: kostyll/gccpy

// Truncate changes the size of the file.
// It does not change the I/O offset.
// If there is an error, it will be of type *PathError.
func (f *File) Truncate(size int64) error {
	var d syscall.Dir

	d.Null()
	d.Length = size

	var buf [syscall.STATFIXLEN]byte
	n, err := d.Marshal(buf[:])
	if err != nil {
		return &PathError{"truncate", f.name, err}
	}
	if err = syscall.Fwstat(f.fd, buf[:n]); err != nil {
		return &PathError{"truncate", f.name, err}
	}
	return nil
}

Example #6

File: file_plan9.go Project: aubonbeurre/gcc

// Chmod changes the mode of the file to mode.
func (f *File) Chmod(mode uint32) error {
	var d Dir
	var mask = ^uint32(0777)

	d.Null()
	odir, e := dirstat(f)
	if iserror(e) {
		return &PathError{"chmod", f.name, e}
	}

	d.Mode = (odir.Mode & mask) | (mode &^ mask)
	if e := syscall.Fwstat(f.fd, pdir(nil, &d)); iserror(e) {
		return &PathError{"chmod", f.name, e}
	}
	return nil
}

Example #7

File: file_plan9.go Project: kostyll/gccpy

// Sync commits the current contents of the file to stable storage.
// Typically, this means flushing the file system's in-memory copy
// of recently written data to disk.
func (f *File) Sync() (err error) {
	if f == nil {
		return ErrInvalid
	}
	var d syscall.Dir
	d.Null()

	var buf [syscall.STATFIXLEN]byte
	n, err := d.Marshal(buf[:])
	if err != nil {
		return NewSyscallError("fsync", err)
	}
	if err = syscall.Fwstat(f.fd, buf[:n]); err != nil {
		return NewSyscallError("fsync", err)
	}
	return nil
}

Example #8

File: file_plan9.go Project: kostyll/gccpy

// Chmod changes the mode of the file to mode.
// If there is an error, it will be of type *PathError.
func (f *File) Chmod(mode FileMode) error {
	var d syscall.Dir

	odir, e := dirstat(f)
	if e != nil {
		return &PathError{"chmod", f.name, e}
	}
	d.Null()
	d.Mode = odir.Mode&^chmodMask | syscallMode(mode)&chmodMask

	var buf [syscall.STATFIXLEN]byte
	n, err := d.Marshal(buf[:])
	if err != nil {
		return &PathError{"chmod", f.name, err}
	}
	if err = syscall.Fwstat(f.fd, buf[:n]); err != nil {
		return &PathError{"chmod", f.name, err}
	}
	return nil
}