Source: types.go in package os


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.

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)