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