mirror of https://github.com/rclone/rclone
119 lines
3.6 KiB
Go
119 lines
3.6 KiB
Go
// +build darwin
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// Copyright 2019 the Go-FUSE Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package fs
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import (
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"context"
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"syscall"
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"time"
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"unsafe"
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"github.com/hanwen/go-fuse/v2/fuse"
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"github.com/hanwen/go-fuse/v2/internal/utimens"
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)
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func (n *loopbackNode) Getxattr(ctx context.Context, attr string, dest []byte) (uint32, syscall.Errno) {
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return 0, syscall.ENOSYS
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}
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func (n *loopbackNode) Setxattr(ctx context.Context, attr string, data []byte, flags uint32) syscall.Errno {
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return syscall.ENOSYS
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}
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func (n *loopbackNode) Removexattr(ctx context.Context, attr string) syscall.Errno {
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return syscall.ENOSYS
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}
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func (n *loopbackNode) Listxattr(ctx context.Context, dest []byte) (uint32, syscall.Errno) {
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return 0, syscall.ENOSYS
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}
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func (n *loopbackNode) renameExchange(name string, newparent *loopbackNode, newName string) syscall.Errno {
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return syscall.ENOSYS
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}
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func (f *loopbackFile) Allocate(ctx context.Context, off uint64, sz uint64, mode uint32) syscall.Errno {
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// TODO: Handle `mode` parameter.
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// From `man fcntl` on OSX:
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// The F_PREALLOCATE command operates on the following structure:
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//
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// typedef struct fstore {
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// u_int32_t fst_flags; /* IN: flags word */
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// int fst_posmode; /* IN: indicates offset field */
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// off_t fst_offset; /* IN: start of the region */
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// off_t fst_length; /* IN: size of the region */
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// off_t fst_bytesalloc; /* OUT: number of bytes allocated */
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// } fstore_t;
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//
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// The flags (fst_flags) for the F_PREALLOCATE command are as follows:
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//
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// F_ALLOCATECONTIG Allocate contiguous space.
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//
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// F_ALLOCATEALL Allocate all requested space or no space at all.
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//
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// The position modes (fst_posmode) for the F_PREALLOCATE command indicate how to use the offset field. The modes are as fol-
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// lows:
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//
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// F_PEOFPOSMODE Allocate from the physical end of file.
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//
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// F_VOLPOSMODE Allocate from the volume offset.
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k := struct {
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Flags uint32 // u_int32_t
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Posmode int64 // int
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Offset int64 // off_t
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Length int64 // off_t
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Bytesalloc int64 // off_t
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}{
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0,
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0,
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int64(off),
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int64(sz),
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0,
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}
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// Linux version for reference:
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// err := syscall.Fallocate(int(f.File.Fd()), mode, int64(off), int64(sz))
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_, _, errno := syscall.Syscall(syscall.SYS_FCNTL, uintptr(f.fd), uintptr(syscall.F_PREALLOCATE), uintptr(unsafe.Pointer(&k)))
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return errno
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}
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// timeToTimeval - Convert time.Time to syscall.Timeval
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//
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// Note: This does not use syscall.NsecToTimespec because
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// that does not work properly for times before 1970,
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// see https://github.com/golang/go/issues/12777
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func timeToTimeval(t *time.Time) syscall.Timeval {
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var tv syscall.Timeval
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tv.Usec = int32(t.Nanosecond() / 1000)
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tv.Sec = t.Unix()
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return tv
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}
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// MacOS before High Sierra lacks utimensat() and UTIME_OMIT.
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// We emulate using utimes() and extra Getattr() calls.
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func (f *loopbackFile) utimens(a *time.Time, m *time.Time) syscall.Errno {
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var attr fuse.AttrOut
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if a == nil || m == nil {
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errno := f.Getattr(context.Background(), &attr)
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if errno != 0 {
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return errno
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}
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}
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tv := utimens.Fill(a, m, &attr.Attr)
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err := syscall.Futimes(int(f.fd), tv)
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return ToErrno(err)
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}
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func (n *loopbackNode) CopyFileRange(ctx context.Context, fhIn FileHandle,
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offIn uint64, out *Inode, fhOut FileHandle, offOut uint64,
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len uint64, flags uint64) (uint32, syscall.Errno) {
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return 0, syscall.ENOSYS
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}
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