code review 4149046: os: Plan 9 support.

src/pkg/os/stat_plan9.go

 // Copyright 2011 The Go 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 os
 
 import "syscall"
 
 func fileInfoFromStat(fi *FileInfo, d *Dir) *FileInfo {
         fi.Dev = uint64(d.Qid.Vers) | uint64(d.Qid.Type<<32)
@@ skipping 18 matching lines @@
 func dirstat(arg interface{}) (fi *FileInfo, err Error) {
         var name string
         nd := syscall.STATFIXLEN + 16*4
 
         for i := 0; i < 2; i++ { /* should work by the second try */
                 buf := make([]byte, nd)
 
                 var n int
                 var e syscall.Error
 
-                switch syscall_arg := arg.(type) {
+                switch syscallArg := arg.(type) {
                 case *File:
-                        name = syscall_arg.name
-                        n, e = syscall.Fstat(syscall_arg.fd, buf)
+                        name = syscallArg.name
+                        n, e = syscall.Fstat(syscallArg.fd, buf)
                 case string:
-                        name = syscall_arg
+                        name = syscallArg
                         n, e = syscall.Stat(name, buf)
                 }
 
                 if e != nil {
                         return nil, &PathError{"stat", name, e}
                 }
 
                 if n < syscall.STATFIXLEN {
                         return nil, &PathError{"stat", name, Eshortstat}
                 }
@@ skipping 14 matching lines @@
 
         return nil, &PathError{"stat", name, Ebadstat}
 }
 
 
 // Stat returns a FileInfo structure describing the named file and an error, if any.
 func Stat(name string) (fi *FileInfo, err Error) {
         return dirstat(name)
 }
 
+// Lstat returns the FileInfo structure describing the named file and an
+// error, if any.  If the file is a symbolic link (though Plan 9 does not have symbolic links),·
+// the returned FileInfo describes the symbolic link.  Lstat makes no attempt to follow the link.
 func Lstat(name string) (fi *FileInfo, err Error) {

[r, 2011/03/31 22:57:46]

copy the comment for Lstat from file.go

[paulzhol, 2011/04/01 20:16:44]

Done.

         return dirstat(name)
 }