--- third_party/go9p/ufs_freebsd.go.orig	2018-08-08 17:01:39 UTC
+++ third_party/go9p/ufs_freebsd.go
@@ -0,0 +1,235 @@
+package go9p
+
+import (
+	"fmt"
+	"os"
+	"os/user"
+	"path"
+	"strconv"
+	"strings"
+	"syscall"
+	"time"
+)
+
+func atime(stat *syscall.Stat_t) time.Time {
+	return time.Unix(stat.Atimespec.Unix())
+}
+
+// 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.Stat_t).Ino)
+	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.Stat_t)
+
+	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)
+
+	// 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
+	}
+
+	/* 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.Stat_t) {
+	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)
+	}
+}
+
+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()
+}