: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 pretty

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

.. data:: ENOENT

   No such file or directory

.. data:: ESRCH

   No such process

.. data:: EINTR

   Interrupted system call

.. 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

.. data:: EAGAIN

   Try again

.. data:: ENOMEM

   Out of memory

.. data:: EACCES

   Permission denied

.. data:: EFAULT

   Bad address

.. data:: ENOTBLK

   Block device required

.. data:: EBUSY

   Device or resource busy

.. data:: EEXIST

   File exists

.. data:: EXDEV

   Cross-device link

.. data:: ENODEV

   No such device

.. data:: ENOTDIR

   Not a directory

.. data:: EISDIR

   Is a directory

.. 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

.. 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

.. 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:: 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