:mod:!errno --- Standard errno system symbols

.. module:: errno :synopsis: Standard errno system symbols.

---

This module makes available standard errno system symbols. The value of each symbol is the corresponding integer value. The names and descriptions are borrowed from :file:linux/include/errno.h, which should be all-inclusive.

.. data:: errorcode

Dictionary providing a mapping from the errno value to the string name in the underlying system. For instance, errno.errorcode[errno.EPERM] maps to 'EPERM'.

To translate a numeric error code to an error message, use :func:os.strerror.

Of the following list, symbols that are not used on the current platform are not defined by the module. The specific list of defined symbols is available as errno.errorcode.keys(). Symbols available can include:

.. data:: EPERM

Operation not permitted. This error is mapped to the exception :exc:PermissionError.

.. data:: ENOENT

No such file or directory. This error is mapped to the exception :exc:FileNotFoundError.

.. data:: ESRCH

No such process. This error is mapped to the exception :exc:ProcessLookupError.

.. data:: EINTR

Interrupted system call. This error is mapped to the exception :exc:InterruptedError.

.. data:: EIO

I/O error

.. data:: ENXIO

No such device or address

.. data:: E2BIG

Arg list too long

.. data:: ENOEXEC

Exec format error

.. data:: EBADF

Bad file number

.. data:: ECHILD

No child processes. This error is mapped to the exception :exc:ChildProcessError.

.. data:: EAGAIN

Try again. This error is mapped to the exception :exc:BlockingIOError.

.. data:: ENOMEM

Out of memory

.. data:: EACCES

Permission denied. This error is mapped to the exception :exc:PermissionError.

.. data:: EFAULT

Bad address

.. data:: ENOTBLK

Block device required

.. data:: EBUSY

Device or resource busy

.. data:: EEXIST

File exists. This error is mapped to the exception :exc:FileExistsError.

.. data:: EXDEV

Cross-device link

.. data:: ENODEV

No such device

.. data:: ENOTDIR

Not a directory. This error is mapped to the exception :exc:NotADirectoryError.

.. data:: EISDIR

Is a directory. This error is mapped to the exception :exc:IsADirectoryError.

.. data:: EINVAL

Invalid argument

.. data:: ENFILE

File table overflow

.. data:: EMFILE

Too many open files

.. data:: ENOTTY

Not a typewriter

.. data:: ETXTBSY

Text file busy

.. data:: EFBIG

File too large

.. data:: ENOSPC

No space left on device

.. data:: ESPIPE

Illegal seek

.. data:: EROFS

Read-only file system

.. data:: EMLINK

Too many links

.. data:: EPIPE

Broken pipe. This error is mapped to the exception :exc:BrokenPipeError.

.. data:: EDOM

Math argument out of domain of func

.. data:: ERANGE

Math result not representable

.. data:: EDEADLK

Resource deadlock would occur

.. data:: ENAMETOOLONG

File name too long

.. data:: ENOLCK

No record locks available

.. data:: ENOSYS

Function not implemented

.. data:: ENOTEMPTY

Directory not empty

.. data:: ELOOP

Too many symbolic links encountered

.. data:: EWOULDBLOCK

Operation would block. This error is mapped to the exception :exc:BlockingIOError.

.. data:: ENOMSG

No message of desired type

.. data:: EIDRM

Identifier removed

.. data:: ECHRNG

Channel number out of range

.. data:: EL2NSYNC

Level 2 not synchronized

.. data:: EL3HLT

Level 3 halted

.. data:: EL3RST

Level 3 reset

.. data:: ELNRNG

Link number out of range

.. data:: EUNATCH

Protocol driver not attached

.. data:: ENOCSI

No CSI structure available

.. data:: EL2HLT

Level 2 halted

.. data:: EBADE

Invalid exchange

.. data:: EBADR

Invalid request descriptor

.. data:: EXFULL

Exchange full

.. data:: ENOANO

No anode

.. data:: EBADRQC

Invalid request code

.. data:: EBADSLT

Invalid slot

.. data:: EDEADLOCK

File locking deadlock error

.. data:: EBFONT

Bad font file format

.. data:: ENOSTR

Device not a stream

.. data:: ENODATA

No data available

.. data:: ETIME

Timer expired

.. data:: ENOSR

Out of streams resources

.. data:: ENONET

Machine is not on the network

.. data:: ENOPKG

Package not installed

.. data:: EREMOTE

Object is remote

.. data:: ENOLINK

Link has been severed

.. data:: EADV

Advertise error

.. data:: ESRMNT

Srmount error

.. data:: ECOMM

Communication error on send

.. data:: EPROTO

Protocol error

.. data:: EMULTIHOP

Multihop attempted

.. data:: EDOTDOT

RFS specific error

.. data:: EBADMSG

Not a data message

.. data:: EOVERFLOW

Value too large for defined data type

.. data:: ENOTUNIQ

Name not unique on network

.. data:: EBADFD

File descriptor in bad state

.. data:: EREMCHG

Remote address changed

.. data:: ELIBACC

Can not access a needed shared library

.. data:: ELIBBAD

Accessing a corrupted shared library

.. data:: ELIBSCN

.lib section in a.out corrupted

.. data:: ELIBMAX

Attempting to link in too many shared libraries

.. data:: ELIBEXEC

Cannot exec a shared library directly

.. data:: EILSEQ

Illegal byte sequence

.. data:: ERESTART

Interrupted system call should be restarted

.. data:: ESTRPIPE

Streams pipe error

.. data:: EUSERS

Too many users

.. data:: ENOTSOCK

Socket operation on non-socket

.. data:: EDESTADDRREQ

Destination address required

.. data:: EMSGSIZE

Message too long

.. data:: EPROTOTYPE

Protocol wrong type for socket

.. data:: ENOPROTOOPT

Protocol not available

.. data:: EPROTONOSUPPORT

Protocol not supported

.. data:: ESOCKTNOSUPPORT

Socket type not supported

.. data:: EOPNOTSUPP

Operation not supported on transport endpoint

.. data:: ENOTSUP

Operation not supported

.. versionadded:: 3.2

.. data:: EPFNOSUPPORT

Protocol family not supported

.. data:: EAFNOSUPPORT

Address family not supported by protocol

.. data:: EADDRINUSE

Address already in use

.. data:: EADDRNOTAVAIL

Cannot assign requested address

.. data:: ENETDOWN

Network is down

.. data:: ENETUNREACH

Network is unreachable

.. data:: ENETRESET

Network dropped connection because of reset

.. data:: ECONNABORTED

Software caused connection abort. This error is mapped to the exception :exc:ConnectionAbortedError.

.. data:: ECONNRESET

Connection reset by peer. This error is mapped to the exception :exc:ConnectionResetError.

.. data:: ENOBUFS

No buffer space available

.. data:: EISCONN

Transport endpoint is already connected

.. data:: ENOTCONN

Transport endpoint is not connected

.. data:: ESHUTDOWN

Cannot send after transport endpoint shutdown. This error is mapped to the exception :exc:BrokenPipeError.

.. data:: ETOOMANYREFS

Too many references: cannot splice

.. data:: ETIMEDOUT

Connection timed out. This error is mapped to the exception :exc:TimeoutError.

.. data:: ECONNREFUSED

Connection refused. This error is mapped to the exception :exc:ConnectionRefusedError.

.. data:: EHOSTDOWN

Host is down

.. data:: EHOSTUNREACH

No route to host

.. data:: EHWPOISON

Memory page has hardware error.

.. versionadded:: 3.14

.. data:: EALREADY

Operation already in progress. This error is mapped to the exception :exc:BlockingIOError.

.. data:: EINPROGRESS

Operation now in progress. This error is mapped to the exception :exc:BlockingIOError.

.. data:: ESTALE

Stale NFS file handle

.. data:: EUCLEAN

Structure needs cleaning

.. data:: ENOTNAM

Not a XENIX named type file

.. data:: ENAVAIL

No XENIX semaphores available

.. data:: EISNAM

Is a named type file

.. data:: EREMOTEIO

Remote I/O error

.. data:: EDQUOT

Quota exceeded

.. data:: EQFULL

Interface output queue is full

.. versionadded:: 3.11

.. data:: ENOMEDIUM

No medium found

.. data:: EMEDIUMTYPE

Wrong medium type

.. data:: ENOKEY

Required key not available

.. data:: EKEYEXPIRED

Key has expired

.. data:: EKEYREVOKED

Key has been revoked

.. data:: EKEYREJECTED

Key was rejected by service

.. data:: ERFKILL

Operation not possible due to RF-kill

.. data:: ELOCKUNMAPPED

Locked lock was unmapped

.. data:: ENOTACTIVE

Facility is not active

.. data:: EAUTH

Authentication error

.. versionadded:: 3.2

.. data:: EBADARCH

Bad CPU type in executable

.. versionadded:: 3.2

.. data:: EBADEXEC

Bad executable (or shared library)

.. versionadded:: 3.2

.. data:: EBADMACHO

Malformed Mach-o file

.. versionadded:: 3.2

.. data:: EDEVERR

Device error

.. versionadded:: 3.2

.. data:: EFTYPE

Inappropriate file type or format

.. versionadded:: 3.2

.. data:: ENEEDAUTH

Need authenticator

.. versionadded:: 3.2

.. data:: ENOATTR

Attribute not found

.. versionadded:: 3.2

.. data:: ENOPOLICY

Policy not found

.. versionadded:: 3.2

.. data:: EPROCLIM

Too many processes

.. versionadded:: 3.2

.. data:: EPROCUNAVAIL

Bad procedure for program

.. versionadded:: 3.2

.. data:: EPROGMISMATCH

Program version wrong

.. versionadded:: 3.2

.. data:: EPROGUNAVAIL

RPC prog. not avail

.. versionadded:: 3.2

.. data:: EPWROFF

Device power is off

.. versionadded:: 3.2

.. data:: EBADRPC

RPC struct is bad

.. versionadded:: 3.2

.. data:: ERPCMISMATCH

RPC version wrong

.. versionadded:: 3.2

.. data:: ESHLIBVERS

Shared library version mismatch

.. versionadded:: 3.2

.. data:: ENOTCAPABLE

Capabilities insufficient. This error is mapped to the exception :exc:PermissionError.

.. availability:: WASI, FreeBSD

.. versionadded:: 3.11.1

.. data:: ECANCELED

Operation canceled

.. versionadded:: 3.2

.. data:: EOWNERDEAD

Owner died

.. versionadded:: 3.2

.. data:: ENOTRECOVERABLE

State not recoverable

.. versionadded:: 3.2