// NB: Attributes that the user can't set are always ignored.
// If the user has no permissioin to set an attribute, that's an error.
// Setting an attribute to an empty string removes it.
// Uid, Gid, and Wuid can't be removed.
// Meta locking done by caller, might lock data on truncations
func (f *mFile) wstat(d zx.Dir) error {
if len(d) == 0 {
return nil
}
d = d.Dup()
sum := ""
if f.d["type"] != "d" {
if _, ok := d["size"]; ok {
sz := d.Int64("size")
if sz < 0 {
sz = 0
}
f.data.Truncate(sz)
d["size"] = strconv.FormatInt(sz, 10)
if DoSum {
sum = f.data.Sum()
}
}
} else {
delete(d, "size")
}
if _, ok := d["mode"]; ok {
mode := d.Int("mode")&0777
d["mode"] = "0" + strconv.FormatInt(int64(mode), 8)
}
if _, ok := d["mtime"]; ok {
d.SetTime("mtime", d.Time("mtime"))
}
if sum != "" {
f.d["Sum"] = sum
}
ud := d.UsrAttrs()
if d["Wuid"] != "" {
ud["Wuid"] = d["Wuid"]
}
for k, v := range ud {
if v == "" {
delete(f.d, k)
} else {
f.d[k] = v
}
}
return nil
}
func (t *Fs) Put(rid string, d zx.Dir, off int64, dc <-chan []byte, pred string) chan zx.Dir {
d = d.Dup()
t.dprintf("put %s %v %d '%s'\n", rid, d, off, pred)
cs := t.IOstats.NewCall(zx.Sput)
c := make(chan zx.Dir, 1)
go func() {
cs.Sending()
rid, err := zx.AbsPath(rid)
var nm, n int64
var nd zx.Dir
if err == nil && rid == "/Ctl" {
nc, xerr := t.putCtl(dc)
if xerr == nil {
nd = zx.Dir{"size": "0"}
if DoSum {
nd["Sum"] = zx.Zsum()
}
nd.SetTime("mtime", time.Now())
nm = 1
n = int64(nc)
}
err = xerr
} else if err == nil {
nd, nm, n, err = t.put(rid, d, off, dc, pred)
cs.Sends(nm, n)
}
if err == nil {
rd := zx.Dir{"size": nd["size"], "mtime": nd["mtime"]}
if nd["Sum"] != "" {
rd["Sum"] = nd["Sum"]
}
t.dprintf("put %s: %s (wrote %d)\n", rid, rd, n)
c <- rd
} else {
t.dprintf("put %s: %s\n", rid, err)
close(dc, err)
}
close(c, err)
cs.End(err != nil)
}()
return c
}
func (t *Fs) Put(rid string, d zx.Dir, off int64, dc <-chan []byte, pred string) chan zx.Dir {
d = d.UsrAttrs()
t.dprintf("put %s %v %d '%s'\n", rid, d, off, pred)
cs := t.IOstats.NewCall(zx.Sput)
c := make(chan zx.Dir, 1)
go func() {
cs.Sending()
rid, err := zx.AbsPath(rid)
var nd zx.Dir
if err == nil && rid == "/" {
err = fmt.Errorf("/: %s", dbg.ErrPerm)
}
if err == nil && rid == "/Ctl" {
xerr := t.putCtl(dc)
if xerr == nil {
nd = zx.Dir{"size": "0", "Sum": zx.Zsum()}
nd.SetTime("mtime", time.Now())
}
err = xerr
} else if err == nil {
err = t.put(rid, d, off, dc, pred)
if err == nil {
nd, err = t.stat(rid)
}
}
if err == nil {
rd := zx.Dir{"size": nd["size"], "mtime": nd["mtime"], "Sum": nd["Sum"]}
t.dprintf("put %s: %s\n", rid, rd)
c <- rd
} else {
t.dprintf("put %s: %s\n", rid, err)
close(dc, err)
}
close(c, err)
cs.End(err != nil)
}()
return c
}
// set a fake mtime that can be predicted.
func TouchZX(fs zx.RWTree, path string) error {
d := zx.Dir{}
d.SetTime("mtime", time.Unix(xt/1e9, xt%1e9))
xt += 1e9
return <-fs.Wstat(path, d)
}