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-rw-r--r--src/os/stat_plan9.go110
1 files changed, 110 insertions, 0 deletions
diff --git a/src/os/stat_plan9.go b/src/os/stat_plan9.go
new file mode 100644
index 0000000..57ae6fb
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+++ b/src/os/stat_plan9.go
@@ -0,0 +1,110 @@
+// 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"
+ "time"
+)
+
+const bitSize16 = 2
+
+func fileInfoFromStat(d *syscall.Dir) *fileStat {
+ fs := &fileStat{
+ name: d.Name,
+ size: d.Length,
+ modTime: time.Unix(int64(d.Mtime), 0),
+ sys: d,
+ }
+ fs.mode = FileMode(d.Mode & 0777)
+ if d.Mode&syscall.DMDIR != 0 {
+ fs.mode |= ModeDir
+ }
+ if d.Mode&syscall.DMAPPEND != 0 {
+ fs.mode |= ModeAppend
+ }
+ if d.Mode&syscall.DMEXCL != 0 {
+ fs.mode |= ModeExclusive
+ }
+ if d.Mode&syscall.DMTMP != 0 {
+ fs.mode |= ModeTemporary
+ }
+ // Consider all files not served by #M as device files.
+ if d.Type != 'M' {
+ fs.mode |= ModeDevice
+ }
+ // Consider all files served by #c as character device files.
+ if d.Type == 'c' {
+ fs.mode |= ModeCharDevice
+ }
+ return fs
+}
+
+// arg is an open *File or a path string.
+func dirstat(arg interface{}) (*syscall.Dir, error) {
+ var name string
+ var err error
+
+ size := syscall.STATFIXLEN + 16*4
+
+ for i := 0; i < 2; i++ {
+ buf := make([]byte, bitSize16+size)
+
+ var n int
+ switch a := arg.(type) {
+ case *File:
+ name = a.name
+ n, err = syscall.Fstat(a.fd, buf)
+ case string:
+ name = a
+ n, err = syscall.Stat(a, buf)
+ default:
+ panic("phase error in dirstat")
+ }
+
+ if n < bitSize16 {
+ return nil, &PathError{Op: "stat", Path: name, Err: err}
+ }
+
+ // Pull the real size out of the stat message.
+ size = int(uint16(buf[0]) | uint16(buf[1])<<8)
+
+ // If the stat message is larger than our buffer we will
+ // go around the loop and allocate one that is big enough.
+ if size <= n {
+ d, err := syscall.UnmarshalDir(buf[:n])
+ if err != nil {
+ return nil, &PathError{Op: "stat", Path: name, Err: err}
+ }
+ return d, nil
+ }
+
+ }
+
+ if err == nil {
+ err = syscall.ErrBadStat
+ }
+
+ return nil, &PathError{Op: "stat", Path: name, Err: err}
+}
+
+// statNolog implements Stat for Plan 9.
+func statNolog(name string) (FileInfo, error) {
+ d, err := dirstat(name)
+ if err != nil {
+ return nil, err
+ }
+ return fileInfoFromStat(d), nil
+}
+
+// lstatNolog implements Lstat for Plan 9.
+func lstatNolog(name string) (FileInfo, error) {
+ return statNolog(name)
+}
+
+// For testing.
+func atime(fi FileInfo) time.Time {
+ return time.Unix(int64(fi.Sys().(*syscall.Dir).Atime), 0)
+}