os

package standard library

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Versions in this module

go1

go1.18.10

Jan 10, 2023 GO-2025-3750GO-2026-4403

GO-2025-3750: Inconsistent handling of O_CREATE|O_EXCL on Unix and Windows in os in syscall

GO-2026-4403: Improper access to parent directory of root in os

Changes in this version

+ const DevNull

+ const ModeAppend

+ const ModeCharDevice

+ const ModeDevice

+ const ModeDir

+ const ModeExclusive

+ const ModeIrregular

+ const ModeNamedPipe

+ const ModePerm

+ const ModeSetgid

+ const ModeSetuid

+ const ModeSocket

+ const ModeSticky

+ const ModeSymlink

+ const ModeTemporary

+ const ModeType

+ const O_APPEND

+ const O_CREATE

+ const O_EXCL

+ const O_RDONLY

+ const O_RDWR

+ const O_SYNC

+ const O_TRUNC

+ const O_WRONLY

+ const PathListSeparator

+ const PathSeparator

+ const SEEK_CUR

+ const SEEK_END

+ const SEEK_SET

+ var Args []string

+ var ErrClosed = fs.ErrClosed

+ var ErrDeadlineExceeded = errDeadlineExceeded()

+ var ErrExist = fs.ErrExist

+ var ErrInvalid = fs.ErrInvalid

+ var ErrNoDeadline = errNoDeadline()

+ var ErrNotExist = fs.ErrNotExist

+ var ErrPermission = fs.ErrPermission

+ var ErrProcessDone = errors.New("os: process already finished")

+ var Stderr = NewFile(uintptr(syscall.Stderr), "/dev/stderr")

+ var Stdin = NewFile(uintptr(syscall.Stdin), "/dev/stdin")

+ var Stdout = NewFile(uintptr(syscall.Stdout), "/dev/stdout")

+ func Chdir(dir string) error

+ func Chmod(name string, mode FileMode) error

+ func Chown(name string, uid, gid int) error

+ func Chtimes(name string, atime time.Time, mtime time.Time) error

+ func Clearenv()

+ func DirFS(dir string) fs.FS

+ func Environ() []string

+ func Executable() (string, error)

+ func Exit(code int)

+ func Expand(s string, mapping func(string) string) string

+ func ExpandEnv(s string) string

+ func Getegid() int

+ func Getenv(key string) string

+ func Geteuid() int

+ func Getgid() int

+ func Getgroups() ([]int, error)

+ func Getpagesize() int

+ func Getpid() int

+ func Getppid() int

+ func Getuid() int

+ func Getwd() (dir string, err error)

+ func Hostname() (name string, err error)

+ func IsExist(err error) bool

+ func IsNotExist(err error) bool

+ func IsPathSeparator(c uint8) bool

+ func IsPermission(err error) bool

+ func IsTimeout(err error) bool

+ func Lchown(name string, uid, gid int) error

+ func Link(oldname, newname string) error

+ func LookupEnv(key string) (string, bool)

+ func Mkdir(name string, perm FileMode) error

+ func MkdirAll(path string, perm FileMode) error

+ func MkdirTemp(dir, pattern string) (string, error)

+ func NewSyscallError(syscall string, err error) error

+ func Pipe() (r *File, w *File, err error)

+ func ReadFile(name string) ([]byte, error)

+ func Readlink(name string) (string, error)

+ func Remove(name string) error

+ func RemoveAll(path string) error

+ func Rename(oldpath, newpath string) error

+ func SameFile(fi1, fi2 FileInfo) bool

+ func Setenv(key, value string) error

+ func Symlink(oldname, newname string) error

+ func TempDir() string

+ func Truncate(name string, size int64) error

+ func Unsetenv(key string) error

+ func UserCacheDir() (string, error)

+ func UserConfigDir() (string, error)

+ func UserHomeDir() (string, error)

+ func WriteFile(name string, data []byte, perm FileMode) error

+ type DirEntry = fs.DirEntry

+ func ReadDir(name string) ([]DirEntry, error)

+ type File struct

+ func Create(name string) (*File, error)

+ func CreateTemp(dir, pattern string) (*File, error)

+ func NewFile(fd uintptr, name string) *File

+ func Open(name string) (*File, error)

+ func OpenFile(name string, flag int, perm FileMode) (*File, error)

+ func (f *File) Chdir() error

+ func (f *File) Chmod(mode FileMode) error

+ func (f *File) Chown(uid, gid int) error

+ func (f *File) Close() error

+ func (f *File) Fd() uintptr

+ func (f *File) Name() string

+ func (f *File) Read(b []byte) (n int, err error)

+ func (f *File) ReadAt(b []byte, off int64) (n int, err error)

+ func (f *File) ReadDir(n int) ([]DirEntry, error)

+ func (f *File) ReadFrom(r io.Reader) (n int64, err error)

+ func (f *File) Readdir(n int) ([]FileInfo, error)

+ func (f *File) Readdirnames(n int) (names []string, err error)

+ func (f *File) Seek(offset int64, whence int) (ret int64, err error)

+ func (f *File) SetDeadline(t time.Time) error

+ func (f *File) SetReadDeadline(t time.Time) error

+ func (f *File) SetWriteDeadline(t time.Time) error

+ func (f *File) Stat() (FileInfo, error)

+ func (f *File) Sync() error

+ func (f *File) SyscallConn() (syscall.RawConn, error)

+ func (f *File) Truncate(size int64) error

+ func (f *File) Write(b []byte) (n int, err error)

+ func (f *File) WriteAt(b []byte, off int64) (n int, err error)

+ func (f *File) WriteString(s string) (n int, err error)

+ func (file *File) Fd() uintptr

+ func (file *File) Stat() (FileInfo, error)

+ type FileInfo = fs.FileInfo

+ func Lstat(name string) (FileInfo, error)

+ func Stat(name string) (FileInfo, error)

+ type FileMode = fs.FileMode

+ type LinkError struct

+ Err error

+ New string

+ Old string

+ Op string

+ func (e *LinkError) Error() string

+ func (e *LinkError) Unwrap() error

+ type PathError = fs.PathError

+ type ProcAttr struct

+ Dir string

+ Env []string

+ Files []*File

+ Sys *syscall.SysProcAttr

+ type Process struct

+ Pid int

+ func FindProcess(pid int) (*Process, error)

+ func StartProcess(name string, argv []string, attr *ProcAttr) (*Process, error)

+ func (p *Process) Kill() error

+ func (p *Process) Release() error

+ func (p *Process) Signal(sig Signal) error

+ func (p *Process) Wait() (*ProcessState, error)

+ type ProcessState struct

+ func (p *ProcessState) ExitCode() int

+ func (p *ProcessState) Exited() bool

+ func (p *ProcessState) Pid() int

+ func (p *ProcessState) String() string

+ func (p *ProcessState) Success() bool

+ func (p *ProcessState) Sys() any

+ func (p *ProcessState) SysUsage() any

+ func (p *ProcessState) SystemTime() time.Duration

+ func (p *ProcessState) UserTime() time.Duration

+ type Signal interface

+ Signal func()

+ String func() string

+ var Interrupt Signal = syscall.SIGINT

+ var Kill Signal = syscall.SIGKILL

+ type SyscallError struct

+ Err error

+ Syscall string

+ func (e *SyscallError) Error() string

+ func (e *SyscallError) Timeout() bool

+ func (e *SyscallError) Unwrap() error

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