85 lines
2.0 KiB
Go
85 lines
2.0 KiB
Go
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package os
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import "syscall"
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func fileInfoFromStat(fi *FileInfo, d *Dir) *FileInfo {
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fi.Dev = uint64(d.Qid.Vers) | uint64(d.Qid.Type<<32)
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fi.Ino = d.Qid.Path
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fi.Mode = uint32(d.Mode) & 0777
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if (d.Mode & syscall.DMDIR) == syscall.DMDIR {
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fi.Mode |= syscall.S_IFDIR
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} else {
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fi.Mode |= syscall.S_IFREG
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}
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fi.Size = int64(d.Length)
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fi.Atime_ns = 1e9 * int64(d.Atime)
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fi.Mtime_ns = 1e9 * int64(d.Mtime)
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fi.Name = d.Name
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fi.FollowedSymlink = false
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return fi
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}
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// arg is an open *File or a path string.
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func dirstat(arg interface{}) (fi *FileInfo, err Error) {
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var name string
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nd := syscall.STATFIXLEN + 16*4
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for i := 0; i < 2; i++ { /* should work by the second try */
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buf := make([]byte, nd)
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var n int
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var e syscall.Error
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switch syscallArg := arg.(type) {
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case *File:
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name = syscallArg.name
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n, e = syscall.Fstat(syscallArg.fd, buf)
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case string:
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name = syscallArg
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n, e = syscall.Stat(name, buf)
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}
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if e != nil {
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return nil, &PathError{"stat", name, e}
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}
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if n < syscall.STATFIXLEN {
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return nil, &PathError{"stat", name, Eshortstat}
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}
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ntmp, _ := gbit16(buf)
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nd = int(ntmp)
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if nd <= n {
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d, e := UnmarshalDir(buf[:n])
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if e != nil {
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return nil, &PathError{"stat", name, e}
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}
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return fileInfoFromStat(new(FileInfo), d), nil
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}
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}
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return nil, &PathError{"stat", name, Ebadstat}
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}
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// Stat returns a FileInfo structure describing the named file and an error, if any.
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func Stat(name string) (fi *FileInfo, err Error) {
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return dirstat(name)
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}
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// Lstat returns the FileInfo structure describing the named file and an
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// error, if any. If the file is a symbolic link (though Plan 9 does not have symbolic links),
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// the returned FileInfo describes the symbolic link. Lstat makes no attempt to follow the link.
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func Lstat(name string) (fi *FileInfo, err Error) {
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return dirstat(name)
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}
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