func (sfs *NopSrv) Read(req *go9p.SrvReq) {
fid := req.Fid.Aux.(Dispatcher)
tc := req.Tc
rc := req.Rc
if sfs.Debuglevel > 0 {
log.Printf("read %T %s %d:%d", fid, fid, tc.Offset, tc.Count)
}
buf, err := fid.Read(req)
if err != nil {
req.RespondError(toError(err))
return
}
go9p.InitRread(rc, tc.Count)
count := 0
switch {
case tc.Offset > uint64(len(buf)):
count = 0
case len(buf[tc.Offset:]) > int(tc.Count):
count = int(tc.Count)
default:
count = len(buf[tc.Offset:])
}
copy(rc.Data, buf[tc.Offset:int(tc.Offset)+count])
go9p.SetRreadCount(rc, uint32(count))
req.Respond()
}
// Read reads data from a file handle.
func (fs *fileSystem) Read(req *go9p.SrvReq) {
aux := req.Fid.Aux.(*Aux)
if err := aux.stat(); err != nil {
req.RespondError(err)
return
}
// Add to readset.
fs.addToReadset(aux.rootID, aux.path)
go9p.InitRread(req.Rc, req.Tc.Count)
if aux.st.IsDir() {
fs.readDir(req)
return
}
fs.readFile(req)
}