75 lines
2.8 KiB
Go
75 lines
2.8 KiB
Go
// Copyright 2009 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 (
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"io/fs"
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"syscall"
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)
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// Getpagesize returns the underlying system's memory page size.
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func Getpagesize() int { return syscall.Getpagesize() }
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// File represents an open file descriptor.
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type File struct {
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*file // os specific
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}
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// A FileInfo describes a file and is returned by Stat and Lstat.
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type FileInfo = fs.FileInfo
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// A FileMode represents a file's mode and permission bits.
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// The bits have the same definition on all systems, so that
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// information about files can be moved from one system
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// to another portably. Not all bits apply to all systems.
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// The only required bit is ModeDir for directories.
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type FileMode = fs.FileMode
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// The defined file mode bits are the most significant bits of the FileMode.
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// The nine least-significant bits are the standard Unix rwxrwxrwx permissions.
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// The values of these bits should be considered part of the public API and
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// may be used in wire protocols or disk representations: they must not be
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// changed, although new bits might be added.
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const (
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// The single letters are the abbreviations
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// used by the String method's formatting.
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ModeDir = fs.ModeDir // d: is a directory
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ModeAppend = fs.ModeAppend // a: append-only
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ModeExclusive = fs.ModeExclusive // l: exclusive use
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ModeTemporary = fs.ModeTemporary // T: temporary file; Plan 9 only
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ModeSymlink = fs.ModeSymlink // L: symbolic link
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ModeDevice = fs.ModeDevice // D: device file
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ModeNamedPipe = fs.ModeNamedPipe // p: named pipe (FIFO)
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ModeSocket = fs.ModeSocket // S: Unix domain socket
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ModeSetuid = fs.ModeSetuid // u: setuid
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ModeSetgid = fs.ModeSetgid // g: setgid
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ModeCharDevice = fs.ModeCharDevice // c: Unix character device, when ModeDevice is set
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ModeSticky = fs.ModeSticky // t: sticky
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ModeIrregular = fs.ModeIrregular // ?: non-regular file; nothing else is known about this file
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// Mask for the type bits. For regular files, none will be set.
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ModeType = fs.ModeType
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ModePerm = fs.ModePerm // Unix permission bits, 0o777
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)
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func (fs *fileStat) Name() string { return fs.name }
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func (fs *fileStat) IsDir() bool { return fs.Mode().IsDir() }
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// SameFile reports whether fi1 and fi2 describe the same file.
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// For example, on Unix this means that the device and inode fields
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// of the two underlying structures are identical; on other systems
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// the decision may be based on the path names.
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// SameFile only applies to results returned by this package's Stat.
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// It returns false in other cases.
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func SameFile(fi1, fi2 FileInfo) bool {
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fs1, ok1 := fi1.(*fileStat)
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fs2, ok2 := fi2.(*fileStat)
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if !ok1 || !ok2 {
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return false
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}
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return sameFile(fs1, fs2)
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}
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