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+
+: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
+
+   Network is unreachable
+
+
+.. data:: ENETRESET
+
+   Network dropped connection because of reset
+
+
+.. data:: ECONNABORTED
+
+   Software caused connection abort
+
+
+.. data:: ECONNRESET
+
+   Connection reset by peer
+
+
+.. 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
+
+
+.. data:: ETOOMANYREFS
+
+   Too many references: cannot splice
+
+
+.. data:: ETIMEDOUT
+
+   Connection timed out
+
+
+.. data:: ECONNREFUSED
+
+   Connection refused
+
+
+.. data:: EHOSTDOWN
+
+   Host is down
+
+
+.. data:: EHOSTUNREACH
+
+   No route to host
+
+
+.. data:: EALREADY
+
+   Operation already in progress
+
+
+.. data:: EINPROGRESS
+
+   Operation now in progress
+
+
+.. 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
+