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97 lines
2.4 KiB
Go
97 lines
2.4 KiB
Go
// +build linux darwin freebsd
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package mount
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import (
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"os"
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"time"
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"bazil.org/fuse"
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fusefs "bazil.org/fuse/fs"
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"github.com/ncw/rclone/fs"
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"github.com/ncw/rclone/vfs"
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"golang.org/x/net/context"
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)
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// File represents a file
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type File struct {
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*vfs.File
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}
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// Check interface satisfied
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var _ fusefs.Node = (*File)(nil)
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// Attr fills out the attributes for the file
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func (f *File) Attr(ctx context.Context, a *fuse.Attr) (err error) {
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defer fs.Trace(f, "")("a=%+v, err=%v", a, &err)
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modTime := f.File.ModTime()
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Size := uint64(f.File.Size())
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Blocks := (Size + 511) / 512
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a.Gid = f.VFS().Opt.GID
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a.Uid = f.VFS().Opt.UID
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a.Mode = f.VFS().Opt.FilePerms
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a.Size = Size
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a.Atime = modTime
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a.Mtime = modTime
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a.Ctime = modTime
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a.Crtime = modTime
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a.Blocks = Blocks
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return nil
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}
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// Check interface satisfied
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var _ fusefs.NodeSetattrer = (*File)(nil)
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// Setattr handles attribute changes from FUSE. Currently supports ModTime and Size only
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func (f *File) Setattr(ctx context.Context, req *fuse.SetattrRequest, resp *fuse.SetattrResponse) (err error) {
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defer fs.Trace(f, "a=%+v", req)("err=%v", &err)
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if !f.VFS().Opt.NoModTime {
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if req.Valid.MtimeNow() {
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err = f.File.SetModTime(time.Now())
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}
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if req.Valid.Mtime() {
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err = f.File.SetModTime(req.Mtime)
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}
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}
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if req.Valid.Size() {
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err = f.File.Truncate(int64(req.Size))
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}
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return translateError(err)
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}
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// Check interface satisfied
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var _ fusefs.NodeOpener = (*File)(nil)
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// Open the file for read or write
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func (f *File) Open(ctx context.Context, req *fuse.OpenRequest, resp *fuse.OpenResponse) (fh fusefs.Handle, err error) {
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defer fs.Trace(f, "flags=%v", req.Flags)("fh=%v, err=%v", &fh, &err)
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// fuse flags are based off syscall flags as are os flags, so
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// should be compatible
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//
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// we seem to be missing O_CREATE here so add it in to allow
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// file creation
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handle, err := f.File.Open(int(req.Flags) | os.O_CREATE)
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if err != nil {
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return nil, translateError(err)
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}
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// See if seeking is supported and set FUSE hint accordingly
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if _, err = handle.Seek(0, 1); err != nil {
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resp.Flags |= fuse.OpenNonSeekable
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}
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return &FileHandle{handle}, nil
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}
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// Check interface satisfied
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var _ fusefs.NodeFsyncer = (*File)(nil)
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// Fsync the file
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//
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// Note that we don't do anything except return OK
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func (f *File) Fsync(ctx context.Context, req *fuse.FsyncRequest) (err error) {
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defer fs.Trace(f, "")("err=%v", &err)
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return nil
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}
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