Imported Upstream version 60upstream/60

1 files changed, 90 insertions, 0 deletions

diff --git a/src/pkg/os/stat_plan9.go b/src/pkg/os/stat_plan9.go
new file mode 100644
index 000000000..173a23f8b
--- /dev/null
+++ b/src/pkg/os/stat_plan9.go
@@ -0,0 +1,90 @@
+// 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)
+	fi.Ino = d.Qid.Path
+
+	fi.Mode = uint32(d.Mode) & 0777
+	if (d.Mode & syscall.DMDIR) == syscall.DMDIR {
+		fi.Mode |= syscall.S_IFDIR
+	} else {
+		fi.Mode |= syscall.S_IFREG
+	}
+
+	fi.Size = int64(d.Length)
+	fi.Atime_ns = 1e9 * int64(d.Atime)
+	fi.Mtime_ns = 1e9 * int64(d.Mtime)
+	fi.Name = d.Name
+	fi.FollowedSymlink = false
+	return fi
+}
+
+// arg is an open *File or a path string. 
+func dirstat(arg interface{}) (d *Dir, 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 syscallArg := arg.(type) {
+		case *File:
+			name = syscallArg.name
+			n, e = syscall.Fstat(syscallArg.fd, buf)
+		case string:
+			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}
+		}
+
+		ntmp, _ := gbit16(buf)
+		nd = int(ntmp)
+
+		if nd <= n {
+			d, e := UnmarshalDir(buf[:n])
+
+			if e != nil {
+				return nil, &PathError{"stat", name, e}
+			}
+			return d, e
+		}
+	}
+
+	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) {
+	d, err := dirstat(name)
+	if iserror(err) {
+		return nil, err
+	}
+	return fileInfoFromStat(new(FileInfo), d), err
+}
+
+// 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) {
+	d, err := dirstat(name)
+	if iserror(err) {
+		return nil, err
+	}
+	return fileInfoFromStat(new(FileInfo), d), err
+}