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ufs_windows.go
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ufs_windows.go
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// Copyright 2009 The go9p 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 go9p
import (
"fmt"
"os"
"path"
"strings"
"syscall"
"time"
)
func atime(fi os.FileInfo) time.Time {
return time.Unix(0, fi.Sys().(*syscall.Win32FileAttributeData).LastAccessTime.Nanoseconds())
}
// IsBlock reports if the file is a block device
func isBlock(d os.FileInfo) bool {
// stat := d.Sys().(*syscall.Stat_t)
// return (stat.Mode & syscall.S_IFMT) == syscall.S_IFBLK
return true
}
// IsChar reports if the file is a character device
func isChar(d os.FileInfo) bool {
// stat := d.Sys().(*syscall.Stat_t)
// return (stat.Mode & syscall.S_IFMT) == syscall.S_IFCHR
return true
}
func dir2Qid(d os.FileInfo) *Qid {
var qid Qid
qid.Path = uint64(d.Sys().(*syscall.Win32FileAttributeData).FileSizeLow)
qid.Version = uint32(d.ModTime().UnixNano() / 1000000)
qid.Type = dir2QidType(d)
return &qid
}
func dir2Dir(path string, d os.FileInfo, dotu bool, upool Users) (*Dir, error) {
if r := recover(); r != nil {
fmt.Print("stat failed: ", r)
return nil, &os.PathError{"dir2Dir", path, nil}
}
sysif := d.Sys()
if sysif == nil {
return nil, &os.PathError{"dir2Dir: sysif is nil", path, nil}
}
sysMode := sysif.(*syscall.Win32FileAttributeData)
dir := new(ufsDir)
dir.Qid = *dir2Qid(d)
dir.Mode = dir2Npmode(d, dotu)
// dir.Atime = uint32(0 /*atime(sysMode).Unix()*/)
// dir.Mtime = uint32(d.ModTime().Unix())
dir.Length = uint64(d.Size())
dir.Name = path[strings.LastIndex(path, "/")+1:]
if dotu {
dir.dotu(path, d, upool, sysMode)
return &dir.Dir, nil
}
// unixUid := int(sysMode.Uid)
// unixGid := int(sysMode.Gid)
// dir.Uid = strconv.Itoa(unixUid)
// dir.Gid = strconv.Itoa(unixGid)
dir.Uid = "none"
dir.Gid = "none"
dir.Muid = "none"
// BUG(akumar): LookupId will never find names for
// groups, as it only operates on user ids.
// u, err := user.LookupId(dir.Uid)
// if err == nil {
// dir.Uid = u.Username
// }
// g, err := user.LookupId(dir.Gid)
// if err == nil {
// dir.Gid = g.Username
// }
var err error
/* For Akaros, we use the Muid as the link value. */
if *Akaros && (d.Mode()&os.ModeSymlink != 0) {
dir.Muid, err = os.Readlink(path)
if err == nil {
dir.Mode |= DMSYMLINK
}
}
return &dir.Dir, nil
}
func (dir *ufsDir) dotu(path string, d os.FileInfo, upool Users, sysMode *syscall.Win32FileAttributeData) {
// u := upool.Uid2User(int(sysMode.Uid))
// g := upool.Gid2Group(int(sysMode.Gid))
// dir.Uid = u.Name()
// if dir.Uid == "" {
// dir.Uid = "none"
// }
// dir.Gid = g.Name()
// if dir.Gid == "" {
// dir.Gid = "none"
// }
// dir.Muid = "none"
// dir.Ext = ""
// dir.Uidnum = uint32(u.Id())
// dir.Gidnum = uint32(g.Id())
// dir.Muidnum = NOUID
// if d.Mode()&os.ModeSymlink != 0 {
// var err error
// dir.Ext, err = os.Readlink(path)
// if err != nil {
// dir.Ext = ""
// }
// } else if isBlock(d) {
// dir.Ext = fmt.Sprintf("b %d %d", sysMode.Rdev>>24, sysMode.Rdev&0xFFFFFF)
// } else if isChar(d) {
// dir.Ext = fmt.Sprintf("c %d %d", sysMode.Rdev>>24, sysMode.Rdev&0xFFFFFF)
// }
dir.Uid = "none"
dir.Gid = "none"
dir.Muid = "none"
dir.Uidnum = 0
dir.Gidnum = 0
dir.Muidnum = NOUID
dir.Ext = ""
}
func (u *Ufs) Wstat(req *SrvReq) {
fid := req.Fid.Aux.(*ufsFid)
err := fid.stat()
if err != nil {
req.RespondError(err)
return
}
dir := &req.Tc.Dir
if dir.Mode != 0xFFFFFFFF {
mode := dir.Mode & 0777
if req.Conn.Dotu {
if dir.Mode&DMSETUID > 0 {
mode |= syscall.S_ISUID
}
if dir.Mode&DMSETGID > 0 {
mode |= syscall.S_ISGID
}
}
e := os.Chmod(fid.path, os.FileMode(mode))
if e != nil {
req.RespondError(toError(e))
return
}
}
uid, gid := NOUID, NOUID
if req.Conn.Dotu {
uid = dir.Uidnum
gid = dir.Gidnum
}
// Try to find local uid, gid by name.
if (dir.Uid != "" || dir.Gid != "") && !req.Conn.Dotu {
uid, err = lookup(dir.Uid, false)
if err != nil {
req.RespondError(err)
return
}
// BUG(akumar): Lookup will never find gids
// corresponding to group names, because
// it only operates on user names.
gid, err = lookup(dir.Gid, true)
if err != nil {
req.RespondError(err)
return
}
}
if uid != NOUID || gid != NOUID {
e := os.Chown(fid.path, int(uid), int(gid))
if e != nil {
req.RespondError(toError(e))
return
}
}
if dir.Name != "" {
fmt.Printf("Rename %s to %s\n", fid.path, dir.Name)
// if first char is / it is relative to root, else relative to
// cwd.
var destpath string
if dir.Name[0] == '/' {
destpath = path.Join(u.Root, dir.Name)
fmt.Printf("/ results in %s\n", destpath)
} else {
fiddir, _ := path.Split(fid.path)
destpath = path.Join(fiddir, dir.Name)
fmt.Printf("rel results in %s\n", destpath)
}
err := syscall.Rename(fid.path, destpath)
fmt.Printf("rename %s to %s gets %v\n", fid.path, destpath, err)
if err != nil {
req.RespondError(toError(err))
return
}
fid.path = destpath
}
if dir.Length != 0xFFFFFFFFFFFFFFFF {
e := os.Truncate(fid.path, int64(dir.Length))
if e != nil {
req.RespondError(toError(e))
return
}
}
// If either mtime or atime need to be changed, then
// we must change both.
// if dir.Mtime != ^uint32(0) || dir.Atime != ^uint32(0) {
// mt, at := time.Unix(int64(dir.Mtime), 0), time.Unix(int64(dir.Atime), 0)
// if cmt, cat := (dir.Mtime == ^uint32(0)), (dir.Atime == ^uint32(0)); cmt || cat {
// st, e := os.Stat(fid.path)
// if e != nil {
// req.RespondError(toError(e))
// return
// }
// switch cmt {
// case true:
// mt = st.ModTime()
// default:
// //at = time.Time(0)//atime(st.Sys().(*syscall.Stat_t))
// }
// }
// e := os.Chtimes(fid.path, at, mt)
// if e != nil {
// req.RespondError(toError(e))
// return
// }
// }
req.RespondRwstat()
}