1 64abb42a 2018-04-10 noreply package ufs
  2 64abb42a 2018-04-10 noreply 
  3 64abb42a 2018-04-10 noreply import (
  4 64abb42a 2018-04-10 noreply 	"context"
  5 64abb42a 2018-04-10 noreply 	"io"
  6 64abb42a 2018-04-10 noreply 	"io/ioutil"
  7 64abb42a 2018-04-10 noreply 	"os"
  8 64abb42a 2018-04-10 noreply 	"os/user"
  9 64abb42a 2018-04-10 noreply 	"path/filepath"
 10 64abb42a 2018-04-10 noreply 	"strconv"
 11 64abb42a 2018-04-10 noreply 	"sync"
 12 64abb42a 2018-04-10 noreply 	"syscall"
 13 64abb42a 2018-04-10 noreply 
 14 c55b00ed 2021-12-31 op 	"git.omarpolo.com/go-p9p"
 15 64abb42a 2018-04-10 noreply )
 16 64abb42a 2018-04-10 noreply 
 17 64abb42a 2018-04-10 noreply type session struct {
 18 64abb42a 2018-04-10 noreply 	sync.Mutex
 19 64abb42a 2018-04-10 noreply 	rootRef *FileRef
 20 64abb42a 2018-04-10 noreply 	refs    map[p9p.Fid]*FileRef
 21 64abb42a 2018-04-10 noreply }
 22 64abb42a 2018-04-10 noreply 
 23 64abb42a 2018-04-10 noreply func NewSession(ctx context.Context, root string) (p9p.Session, error) {
 24 64abb42a 2018-04-10 noreply 	return &session{
 25 64abb42a 2018-04-10 noreply 		rootRef: &FileRef{Path: root},
 26 64abb42a 2018-04-10 noreply 		refs:    make(map[p9p.Fid]*FileRef),
 27 64abb42a 2018-04-10 noreply 	}, nil
 28 64abb42a 2018-04-10 noreply }
 29 64abb42a 2018-04-10 noreply 
 30 64abb42a 2018-04-10 noreply func (sess *session) getRef(fid p9p.Fid) (*FileRef, error) {
 31 64abb42a 2018-04-10 noreply 	sess.Lock()
 32 64abb42a 2018-04-10 noreply 	defer sess.Unlock()
 33 64abb42a 2018-04-10 noreply 
 34 64abb42a 2018-04-10 noreply 	if fid == p9p.NOFID {
 35 64abb42a 2018-04-10 noreply 		return nil, p9p.ErrUnknownfid
 36 64abb42a 2018-04-10 noreply 	}
 37 64abb42a 2018-04-10 noreply 
 38 64abb42a 2018-04-10 noreply 	ref, found := sess.refs[fid]
 39 64abb42a 2018-04-10 noreply 	if !found {
 40 64abb42a 2018-04-10 noreply 		return nil, p9p.ErrUnknownfid
 41 64abb42a 2018-04-10 noreply 	}
 42 64abb42a 2018-04-10 noreply 
 43 64abb42a 2018-04-10 noreply 	if err := ref.Stat(); err != nil {
 44 64abb42a 2018-04-10 noreply 		return nil, err
 45 64abb42a 2018-04-10 noreply 	}
 46 64abb42a 2018-04-10 noreply 
 47 64abb42a 2018-04-10 noreply 	return ref, nil
 48 64abb42a 2018-04-10 noreply }
 49 64abb42a 2018-04-10 noreply 
 50 64abb42a 2018-04-10 noreply func (sess *session) newRef(fid p9p.Fid, path string) (*FileRef, error) {
 51 64abb42a 2018-04-10 noreply 	sess.Lock()
 52 64abb42a 2018-04-10 noreply 	defer sess.Unlock()
 53 64abb42a 2018-04-10 noreply 
 54 64abb42a 2018-04-10 noreply 	if fid == p9p.NOFID {
 55 64abb42a 2018-04-10 noreply 		return nil, p9p.ErrUnknownfid
 56 64abb42a 2018-04-10 noreply 	}
 57 64abb42a 2018-04-10 noreply 
 58 64abb42a 2018-04-10 noreply 	_, found := sess.refs[fid]
 59 64abb42a 2018-04-10 noreply 	if found {
 60 64abb42a 2018-04-10 noreply 		return nil, p9p.ErrDupfid
 61 64abb42a 2018-04-10 noreply 	}
 62 64abb42a 2018-04-10 noreply 
 63 64abb42a 2018-04-10 noreply 	ref := &FileRef{Path: path}
 64 64abb42a 2018-04-10 noreply 	if err := ref.Stat(); err != nil {
 65 64abb42a 2018-04-10 noreply 		return nil, err
 66 64abb42a 2018-04-10 noreply 	}
 67 64abb42a 2018-04-10 noreply 
 68 64abb42a 2018-04-10 noreply 	sess.refs[fid] = ref
 69 64abb42a 2018-04-10 noreply 	return ref, nil
 70 64abb42a 2018-04-10 noreply }
 71 64abb42a 2018-04-10 noreply 
 72 64abb42a 2018-04-10 noreply func (sess *session) Auth(ctx context.Context, afid p9p.Fid, uname, aname string) (p9p.Qid, error) {
 73 64abb42a 2018-04-10 noreply 	// TODO: AuthInit?
 74 64abb42a 2018-04-10 noreply 	return p9p.Qid{}, nil //p9p.MessageRerror{Ename: "no auth"}
 75 64abb42a 2018-04-10 noreply }
 76 64abb42a 2018-04-10 noreply 
 77 64abb42a 2018-04-10 noreply func (sess *session) Attach(ctx context.Context, fid, afid p9p.Fid, uname, aname string) (p9p.Qid, error) {
 78 64abb42a 2018-04-10 noreply 	if uname == "" {
 79 64abb42a 2018-04-10 noreply 		return p9p.Qid{}, p9p.MessageRerror{Ename: "no user"}
 80 64abb42a 2018-04-10 noreply 	}
 81 64abb42a 2018-04-10 noreply 
 82 64abb42a 2018-04-10 noreply 	// TODO: AuthCheck?
 83 64abb42a 2018-04-10 noreply 
 84 64abb42a 2018-04-10 noreply 	// if afid > 0 {
 85 64abb42a 2018-04-10 noreply 	// 	return p9p.Qid{}, p9p.MessageRerror{Ename: "attach: no auth"}
 86 64abb42a 2018-04-10 noreply 	// }
 87 64abb42a 2018-04-10 noreply 
 88 64abb42a 2018-04-10 noreply 	if aname == "" {
 89 64abb42a 2018-04-10 noreply 		aname = sess.rootRef.Path
 90 64abb42a 2018-04-10 noreply 	}
 91 64abb42a 2018-04-10 noreply 
 92 64abb42a 2018-04-10 noreply 	ref, err := sess.newRef(fid, aname)
 93 64abb42a 2018-04-10 noreply 	if err != nil {
 94 64abb42a 2018-04-10 noreply 		return p9p.Qid{}, err
 95 64abb42a 2018-04-10 noreply 	}
 96 64abb42a 2018-04-10 noreply 
 97 64abb42a 2018-04-10 noreply 	return ref.Info.Qid, nil
 98 64abb42a 2018-04-10 noreply }
 99 64abb42a 2018-04-10 noreply 
100 64abb42a 2018-04-10 noreply func (sess *session) Clunk(ctx context.Context, fid p9p.Fid) error {
101 64abb42a 2018-04-10 noreply 	ref, err := sess.getRef(fid)
102 64abb42a 2018-04-10 noreply 	if err != nil {
103 64abb42a 2018-04-10 noreply 		return err
104 64abb42a 2018-04-10 noreply 	}
105 64abb42a 2018-04-10 noreply 
106 64abb42a 2018-04-10 noreply 	ref.Lock()
107 64abb42a 2018-04-10 noreply 	defer ref.Unlock()
108 64abb42a 2018-04-10 noreply 	if ref.File != nil {
109 64abb42a 2018-04-10 noreply 		ref.File.Close()
110 64abb42a 2018-04-10 noreply 	}
111 64abb42a 2018-04-10 noreply 
112 64abb42a 2018-04-10 noreply 	sess.Lock()
113 64abb42a 2018-04-10 noreply 	defer sess.Unlock()
114 64abb42a 2018-04-10 noreply 	delete(sess.refs, fid)
115 64abb42a 2018-04-10 noreply 
116 64abb42a 2018-04-10 noreply 	return nil
117 64abb42a 2018-04-10 noreply }
118 64abb42a 2018-04-10 noreply 
119 64abb42a 2018-04-10 noreply func (sess *session) Remove(ctx context.Context, fid p9p.Fid) error {
120 64abb42a 2018-04-10 noreply 	defer sess.Clunk(ctx, fid)
121 64abb42a 2018-04-10 noreply 
122 64abb42a 2018-04-10 noreply 	ref, err := sess.getRef(fid)
123 64abb42a 2018-04-10 noreply 	if err != nil {
124 64abb42a 2018-04-10 noreply 		return err
125 64abb42a 2018-04-10 noreply 	}
126 64abb42a 2018-04-10 noreply 
127 64abb42a 2018-04-10 noreply 	// TODO: check write perms on parent
128 64abb42a 2018-04-10 noreply 
129 64abb42a 2018-04-10 noreply 	return os.Remove(ref.Path)
130 64abb42a 2018-04-10 noreply }
131 64abb42a 2018-04-10 noreply 
132 64abb42a 2018-04-10 noreply func (sess *session) Walk(ctx context.Context, fid p9p.Fid, newfid p9p.Fid, names ...string) ([]p9p.Qid, error) {
133 64abb42a 2018-04-10 noreply 	var qids []p9p.Qid
134 64abb42a 2018-04-10 noreply 
135 64abb42a 2018-04-10 noreply 	ref, err := sess.getRef(fid)
136 64abb42a 2018-04-10 noreply 	if err != nil {
137 64abb42a 2018-04-10 noreply 		return qids, err
138 64abb42a 2018-04-10 noreply 	}
139 64abb42a 2018-04-10 noreply 
140 64abb42a 2018-04-10 noreply 	newref, err := sess.newRef(newfid, ref.Path)
141 64abb42a 2018-04-10 noreply 	if err != nil {
142 64abb42a 2018-04-10 noreply 		return qids, err
143 64abb42a 2018-04-10 noreply 	}
144 64abb42a 2018-04-10 noreply 
145 64abb42a 2018-04-10 noreply 	path := newref.Path
146 64abb42a 2018-04-10 noreply 	for _, name := range names {
147 64abb42a 2018-04-10 noreply 		newpath := filepath.Join(path, name)
148 64abb42a 2018-04-10 noreply 		r := &FileRef{Path: newpath}
149 64abb42a 2018-04-10 noreply 		if err := r.Stat(); err != nil {
150 64abb42a 2018-04-10 noreply 			break
151 64abb42a 2018-04-10 noreply 		}
152 64abb42a 2018-04-10 noreply 		qids = append(qids, r.Info.Qid)
153 64abb42a 2018-04-10 noreply 		path = newpath
154 64abb42a 2018-04-10 noreply 	}
155 64abb42a 2018-04-10 noreply 
156 64abb42a 2018-04-10 noreply 	newref.Path = path
157 64abb42a 2018-04-10 noreply 	return qids, nil
158 64abb42a 2018-04-10 noreply }
159 64abb42a 2018-04-10 noreply 
160 64abb42a 2018-04-10 noreply func (sess *session) Read(ctx context.Context, fid p9p.Fid, p []byte, offset int64) (n int, err error) {
161 64abb42a 2018-04-10 noreply 	ref, err := sess.getRef(fid)
162 64abb42a 2018-04-10 noreply 	if err != nil {
163 64abb42a 2018-04-10 noreply 		return 0, err
164 64abb42a 2018-04-10 noreply 	}
165 64abb42a 2018-04-10 noreply 
166 64abb42a 2018-04-10 noreply 	ref.Lock()
167 64abb42a 2018-04-10 noreply 	defer ref.Unlock()
168 64abb42a 2018-04-10 noreply 
169 64abb42a 2018-04-10 noreply 	if ref.IsDir() {
170 64abb42a 2018-04-10 noreply 		if offset == 0 && ref.Readdir == nil {
171 64abb42a 2018-04-10 noreply 			files, err := ioutil.ReadDir(ref.Path)
172 64abb42a 2018-04-10 noreply 			if err != nil {
173 64abb42a 2018-04-10 noreply 				return 0, err
174 64abb42a 2018-04-10 noreply 			}
175 64abb42a 2018-04-10 noreply 			var dirs []p9p.Dir
176 64abb42a 2018-04-10 noreply 			for _, info := range files {
177 64abb42a 2018-04-10 noreply 				dirs = append(dirs, dirFromInfo(info))
178 64abb42a 2018-04-10 noreply 			}
179 64abb42a 2018-04-10 noreply 			ref.Readdir = p9p.NewFixedReaddir(p9p.NewCodec(), dirs)
180 64abb42a 2018-04-10 noreply 		}
181 64abb42a 2018-04-10 noreply 		if ref.Readdir == nil {
182 64abb42a 2018-04-10 noreply 			return 0, p9p.ErrBadoffset
183 64abb42a 2018-04-10 noreply 		}
184 64abb42a 2018-04-10 noreply 		return ref.Readdir.Read(ctx, p, offset)
185 64abb42a 2018-04-10 noreply 	}
186 64abb42a 2018-04-10 noreply 
187 64abb42a 2018-04-10 noreply 	if ref.File == nil {
188 64abb42a 2018-04-10 noreply 		return 0, p9p.MessageRerror{Ename: "no file open"} //p9p.ErrClosed
189 64abb42a 2018-04-10 noreply 	}
190 64abb42a 2018-04-10 noreply 
191 64abb42a 2018-04-10 noreply 	n, err = ref.File.ReadAt(p, offset)
192 64abb42a 2018-04-10 noreply 	if err != nil && err != io.EOF {
193 64abb42a 2018-04-10 noreply 		return n, err
194 64abb42a 2018-04-10 noreply 	}
195 64abb42a 2018-04-10 noreply 	return n, nil
196 64abb42a 2018-04-10 noreply }
197 64abb42a 2018-04-10 noreply 
198 64abb42a 2018-04-10 noreply func (sess *session) Write(ctx context.Context, fid p9p.Fid, p []byte, offset int64) (n int, err error) {
199 64abb42a 2018-04-10 noreply 	ref, err := sess.getRef(fid)
200 64abb42a 2018-04-10 noreply 	if err != nil {
201 64abb42a 2018-04-10 noreply 		return 0, err
202 64abb42a 2018-04-10 noreply 	}
203 64abb42a 2018-04-10 noreply 
204 64abb42a 2018-04-10 noreply 	ref.Lock()
205 64abb42a 2018-04-10 noreply 	defer ref.Unlock()
206 64abb42a 2018-04-10 noreply 	if ref.File == nil {
207 64abb42a 2018-04-10 noreply 		return 0, p9p.ErrClosed
208 64abb42a 2018-04-10 noreply 	}
209 64abb42a 2018-04-10 noreply 
210 64abb42a 2018-04-10 noreply 	return ref.File.WriteAt(p, offset)
211 64abb42a 2018-04-10 noreply }
212 64abb42a 2018-04-10 noreply 
213 64abb42a 2018-04-10 noreply func (sess *session) Open(ctx context.Context, fid p9p.Fid, mode p9p.Flag) (p9p.Qid, uint32, error) {
214 64abb42a 2018-04-10 noreply 	ref, err := sess.getRef(fid)
215 64abb42a 2018-04-10 noreply 	if err != nil {
216 64abb42a 2018-04-10 noreply 		return p9p.Qid{}, 0, err
217 64abb42a 2018-04-10 noreply 	}
218 64abb42a 2018-04-10 noreply 
219 64abb42a 2018-04-10 noreply 	ref.Lock()
220 64abb42a 2018-04-10 noreply 	defer ref.Unlock()
221 64abb42a 2018-04-10 noreply 	f, err := os.OpenFile(ref.Path, oflags(mode), 0)
222 64abb42a 2018-04-10 noreply 	if err != nil {
223 64abb42a 2018-04-10 noreply 		return p9p.Qid{}, 0, err
224 64abb42a 2018-04-10 noreply 	}
225 64abb42a 2018-04-10 noreply 	ref.File = f
226 64abb42a 2018-04-10 noreply 	return ref.Info.Qid, 0, nil
227 64abb42a 2018-04-10 noreply }
228 64abb42a 2018-04-10 noreply 
229 64abb42a 2018-04-10 noreply func (sess *session) Create(ctx context.Context, parent p9p.Fid, name string, perm uint32, mode p9p.Flag) (p9p.Qid, uint32, error) {
230 64abb42a 2018-04-10 noreply 	ref, err := sess.getRef(parent)
231 64abb42a 2018-04-10 noreply 	if err != nil {
232 64abb42a 2018-04-10 noreply 		return p9p.Qid{}, 0, err
233 64abb42a 2018-04-10 noreply 	}
234 64abb42a 2018-04-10 noreply 
235 64abb42a 2018-04-10 noreply 	newpath := filepath.Join(ref.Path, name)
236 64abb42a 2018-04-10 noreply 
237 64abb42a 2018-04-10 noreply 	var file *os.File
238 64abb42a 2018-04-10 noreply 	switch {
239 64abb42a 2018-04-10 noreply 	case perm&p9p.DMDIR != 0:
240 64abb42a 2018-04-10 noreply 		err = os.Mkdir(newpath, os.FileMode(perm&0777))
241 64abb42a 2018-04-10 noreply 
242 64abb42a 2018-04-10 noreply 	case perm&p9p.DMSYMLINK != 0:
243 64abb42a 2018-04-10 noreply 	case perm&p9p.DMNAMEDPIPE != 0:
244 64abb42a 2018-04-10 noreply 	case perm&p9p.DMDEVICE != 0:
245 64abb42a 2018-04-10 noreply 		err = p9p.MessageRerror{Ename: "not implemented"}
246 64abb42a 2018-04-10 noreply 
247 64abb42a 2018-04-10 noreply 	default:
248 64abb42a 2018-04-10 noreply 		file, err = os.OpenFile(newpath, oflags(mode)|os.O_CREATE, os.FileMode(perm&0777))
249 64abb42a 2018-04-10 noreply 	}
250 64abb42a 2018-04-10 noreply 
251 64abb42a 2018-04-10 noreply 	if file == nil && err == nil {
252 64abb42a 2018-04-10 noreply 		file, err = os.OpenFile(newpath, oflags(mode), 0)
253 64abb42a 2018-04-10 noreply 	}
254 64abb42a 2018-04-10 noreply 
255 64abb42a 2018-04-10 noreply 	if err != nil {
256 64abb42a 2018-04-10 noreply 		return p9p.Qid{}, 0, err
257 64abb42a 2018-04-10 noreply 	}
258 64abb42a 2018-04-10 noreply 
259 64abb42a 2018-04-10 noreply 	ref.Lock()
260 64abb42a 2018-04-10 noreply 	defer ref.Unlock()
261 64abb42a 2018-04-10 noreply 	ref.Path = newpath
262 64abb42a 2018-04-10 noreply 	ref.File = file
263 64abb42a 2018-04-10 noreply 	if err := ref.statLocked(); err != nil {
264 64abb42a 2018-04-10 noreply 		return p9p.Qid{}, 0, err
265 64abb42a 2018-04-10 noreply 	}
266 64abb42a 2018-04-10 noreply 	return ref.Info.Qid, 0, err
267 64abb42a 2018-04-10 noreply }
268 64abb42a 2018-04-10 noreply 
269 64abb42a 2018-04-10 noreply func (sess *session) Stat(ctx context.Context, fid p9p.Fid) (p9p.Dir, error) {
270 64abb42a 2018-04-10 noreply 	ref, err := sess.getRef(fid)
271 64abb42a 2018-04-10 noreply 	if err != nil {
272 64abb42a 2018-04-10 noreply 		return p9p.Dir{}, err
273 64abb42a 2018-04-10 noreply 	}
274 64abb42a 2018-04-10 noreply 	return ref.Info, nil
275 64abb42a 2018-04-10 noreply }
276 64abb42a 2018-04-10 noreply 
277 64abb42a 2018-04-10 noreply func (sess *session) WStat(ctx context.Context, fid p9p.Fid, dir p9p.Dir) error {
278 64abb42a 2018-04-10 noreply 	ref, err := sess.getRef(fid)
279 64abb42a 2018-04-10 noreply 	if err != nil {
280 64abb42a 2018-04-10 noreply 		return err
281 64abb42a 2018-04-10 noreply 	}
282 64abb42a 2018-04-10 noreply 
283 64abb42a 2018-04-10 noreply 	if dir.Mode != ^uint32(0) {
284 64abb42a 2018-04-10 noreply 		// TODO: 9P2000.u: DMSETUID DMSETGID
285 64abb42a 2018-04-10 noreply 		err := os.Chmod(ref.Path, os.FileMode(dir.Mode&0777))
286 64abb42a 2018-04-10 noreply 		if err != nil {
287 64abb42a 2018-04-10 noreply 			return err
288 64abb42a 2018-04-10 noreply 		}
289 64abb42a 2018-04-10 noreply 	}
290 64abb42a 2018-04-10 noreply 
291 64abb42a 2018-04-10 noreply 	if dir.UID != "" || dir.GID != "" {
292 64abb42a 2018-04-10 noreply 		usr, err := user.Lookup(dir.UID)
293 64abb42a 2018-04-10 noreply 		if err != nil {
294 64abb42a 2018-04-10 noreply 			return err
295 64abb42a 2018-04-10 noreply 		}
296 64abb42a 2018-04-10 noreply 		uid, err := strconv.Atoi(usr.Uid)
297 64abb42a 2018-04-10 noreply 		if err != nil {
298 64abb42a 2018-04-10 noreply 			return err
299 64abb42a 2018-04-10 noreply 		}
300 64abb42a 2018-04-10 noreply 		grp, err := user.LookupGroup(dir.GID)
301 64abb42a 2018-04-10 noreply 		if err != nil {
302 64abb42a 2018-04-10 noreply 			return err
303 64abb42a 2018-04-10 noreply 		}
304 64abb42a 2018-04-10 noreply 		gid, err := strconv.Atoi(grp.Gid)
305 64abb42a 2018-04-10 noreply 		if err != nil {
306 64abb42a 2018-04-10 noreply 			return err
307 64abb42a 2018-04-10 noreply 		}
308 64abb42a 2018-04-10 noreply 		if err := os.Chown(ref.Path, uid, gid); err != nil {
309 64abb42a 2018-04-10 noreply 			return err
310 64abb42a 2018-04-10 noreply 		}
311 64abb42a 2018-04-10 noreply 	}
312 64abb42a 2018-04-10 noreply 
313 64abb42a 2018-04-10 noreply 	if dir.Name != "" {
314 64abb42a 2018-04-10 noreply 		newpath := filepath.Join(filepath.Dir(ref.Path), dir.Name)
315 64abb42a 2018-04-10 noreply 		if err := syscall.Rename(ref.Path, newpath); err != nil {
316 64abb42a 2018-04-10 noreply 			return nil
317 64abb42a 2018-04-10 noreply 		}
318 64abb42a 2018-04-10 noreply 		ref.Lock()
319 64abb42a 2018-04-10 noreply 		defer ref.Unlock()
320 64abb42a 2018-04-10 noreply 		ref.Path = newpath
321 64abb42a 2018-04-10 noreply 	}
322 64abb42a 2018-04-10 noreply 
323 64abb42a 2018-04-10 noreply 	if dir.Length != ^uint64(0) {
324 64abb42a 2018-04-10 noreply 		if err := os.Truncate(ref.Path, int64(dir.Length)); err != nil {
325 64abb42a 2018-04-10 noreply 			return err
326 64abb42a 2018-04-10 noreply 		}
327 64abb42a 2018-04-10 noreply 	}
328 64abb42a 2018-04-10 noreply 
329 64abb42a 2018-04-10 noreply 	// If either mtime or atime need to be changed, then
330 64abb42a 2018-04-10 noreply 	// we must change both.
331 64abb42a 2018-04-10 noreply 	//if dir.ModTime != time.Time{} || dir.AccessTime != ^uint32(0) {
332 64abb42a 2018-04-10 noreply 	// mt, at := time.Unix(int64(dir.Mtime), 0), time.Unix(int64(dir.Atime), 0)
333 64abb42a 2018-04-10 noreply 	// if cmt, cat := (dir.Mtime == ^uint32(0)), (dir.Atime == ^uint32(0)); cmt || cat {
334 64abb42a 2018-04-10 noreply 	// 	st, e := os.Stat(fid.path)
335 64abb42a 2018-04-10 noreply 	// 	if e != nil {
336 64abb42a 2018-04-10 noreply 	// 		req.RespondError(toError(e))
337 64abb42a 2018-04-10 noreply 	// 		return
338 64abb42a 2018-04-10 noreply 	// 	}
339 64abb42a 2018-04-10 noreply 	// 	switch cmt {
340 64abb42a 2018-04-10 noreply 	// 	case true:
341 64abb42a 2018-04-10 noreply 	// 		mt = st.ModTime()
342 64abb42a 2018-04-10 noreply 	// 	default:
343 64abb42a 2018-04-10 noreply 	// 		at = atime(st.Sys().(*syscall.Stat_t))
344 64abb42a 2018-04-10 noreply 	// 	}
345 64abb42a 2018-04-10 noreply 	// }
346 64abb42a 2018-04-10 noreply 	// e := os.Chtimes(fid.path, at, mt)
347 64abb42a 2018-04-10 noreply 	// if e != nil {
348 64abb42a 2018-04-10 noreply 	// 	req.RespondError(toError(e))
349 64abb42a 2018-04-10 noreply 	// 	return
350 64abb42a 2018-04-10 noreply 	// }
351 64abb42a 2018-04-10 noreply 	//}
352 64abb42a 2018-04-10 noreply 	return nil
353 64abb42a 2018-04-10 noreply }
354 64abb42a 2018-04-10 noreply 
355 64abb42a 2018-04-10 noreply func (sess *session) Version() (msize int, version string) {
356 64abb42a 2018-04-10 noreply 	return p9p.DefaultMSize, p9p.DefaultVersion
357 64abb42a 2018-04-10 noreply }