| // Copyright 2016 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. |
| |
| package os |
| |
| import ( |
| "errors" |
| "internal/poll" |
| "syscall" |
| "syscall/zx/fdio" |
| "time" |
| ) |
| |
| func (f *File) Truncate(size int64) error { |
| if err := f.checkValid("truncate"); err != nil { |
| return err |
| } |
| return syscall.Ftruncate(f.pfd.Sysfd, size) |
| } |
| |
| func (f *File) Sync() error { |
| if f == nil { |
| return ErrInvalid |
| } |
| return syscall.Fsync(f.pfd.Sysfd) |
| } |
| |
| func syscallMode(i FileMode) (o uint32) { |
| o |= uint32(i.Perm()) |
| // TODO i&ModeSetuid != 0 |
| // TODO i&ModeSetgid != 0 |
| // TODO i&ModeSticky != 0 |
| return o |
| } |
| |
| func (f *File) chmod(mode FileMode) error { |
| if err := f.checkValid("chmod"); err != nil { |
| return err |
| } |
| return chmod(f.Name(), mode) |
| } |
| |
| func (f *File) Chown(uid, gid int) error { |
| return errors.New("os: Chown unimplemented on fuchsia") |
| } |
| |
| func chmod(name string, mode FileMode) error { |
| if _, err := Stat(name); err != nil { |
| return err |
| } |
| |
| return nil |
| } |
| |
| func Chown(name string, uid, gid int) error { |
| return errors.New("os: Chown unimplemented on fuchsia") |
| } |
| |
| func Chtimes(name string, atime time.Time, mtime time.Time) error { |
| var utimes [2]syscall.Timespec |
| utimes[0] = syscall.NsecToTimespec(atime.UnixNano()) |
| utimes[1] = syscall.NsecToTimespec(mtime.UnixNano()) |
| if e := syscall.UtimesNano(fixLongPath(name), utimes[0:]); e != nil { |
| return &PathError{"chtimes", name, e} |
| } |
| return nil |
| } |
| |
| func Readlink(name string) (string, error) { |
| return "", errors.New("Readlink unimplemented") |
| } |
| |
| func Pipe() (r *File, w *File, err error) { |
| p0, p1, err := fdio.NewPipes() |
| if err != nil { |
| return nil, nil, err |
| } |
| r = NewFile(uintptr(syscall.OpenFDIO(p0)), "|0") |
| w = NewFile(uintptr(syscall.OpenFDIO(p1)), "|1") |
| // TODO CloseOnExec equivalent |
| return r, w, nil |
| } |
| |
| // Chdir changes the current working directory to the file, |
| // which must be a directory. |
| // If there is an error, it will be of type *PathError. |
| func (f *File) Chdir() error { |
| if err := f.checkValid("chdir"); err != nil { |
| return err |
| } |
| if e := syscall.Fchdir(f.pfd.Sysfd); e != nil { |
| return &PathError{"chdir", f.name, e} |
| } |
| return nil |
| } |
| |
| func sigpipe() // implemented in package runtime |
| |
| var supportsCloseOnExec = true |
| |
| func fillFileStatFromSys(fs *fileStat, name string) { |
| fs.name = basename(name) |
| fs.size = int64(fs.sys.Size) |
| // For now, pretend files have all bits. This should really be: |
| // fs.mode = FileMode(fs.sys.Dev & 0777) |
| // but we don't really set file modes properly and testing for executables |
| // in $PATH fails without the x bit set. |
| fs.mode = FileMode(0766) |
| |
| switch fs.sys.Dev & 0xf000 { |
| case 0x4000: |
| fs.mode = fs.mode | ModeDir |
| case 0x2000: |
| fs.mode = fs.mode | ModeCharDevice |
| case 0xa000: |
| fs.mode = fs.mode | ModeSymlink |
| case 0xc000: |
| fs.mode = fs.mode | ModeSocket |
| } |
| fs.modTime = time.Unix(int64(fs.sys.ModifyTime), 0) |
| } |
| |
| func atime(fi FileInfo) time.Time { |
| // TODO: fdio doesn't have atime yet |
| return time.Time{} |
| } |
| |
| // setDeadline sets the read and write deadline. |
| func (f *File) setDeadline(time.Time) error { |
| if err := f.checkValid("SetDeadline"); err != nil { |
| return err |
| } |
| return poll.ErrNoDeadline |
| } |
| |
| // setReadDeadline sets the read deadline. |
| func (f *File) setReadDeadline(time.Time) error { |
| if err := f.checkValid("SetReadDeadline"); err != nil { |
| return err |
| } |
| return poll.ErrNoDeadline |
| } |
| |
| // setWriteDeadline sets the write deadline. |
| func (f *File) setWriteDeadline(time.Time) error { |
| if err := f.checkValid("SetWriteDeadline"); err != nil { |
| return err |
| } |
| return poll.ErrNoDeadline |
| } |
| |
| // checkValid checks whether f is valid for use. |
| func (f *File) checkValid(op string) error { |
| if f == nil { |
| return ErrInvalid |
| } |
| return nil |
| } |