class Errno

Overview

Errno wraps and gives access to libc's errno. This is mostly useful when dealing with C libraries.

This class is the exception thrown when errno errors are encountered.

Defined in:

errno.cr

Constant Summary

EACCES = LibC::EACCES

Cannot allocate memory

EADDRINUSE = LibC::EADDRINUSE

Address family not supported by protocol family

EADDRNOTAVAIL = LibC::EADDRNOTAVAIL

Address already in use

EAFNOSUPPORT = LibC::EAFNOSUPPORT

Protocol family not supported

EAGAIN = LibC::EAGAIN

Result too large

EALREADY = LibC::EALREADY

Operation now in progress

EBADF = LibC::EBADF

Exec format error

EBADMSG = LibC::EBADMSG

Illegal byte sequence

EBUSY = LibC::EBUSY

Block device required

ECANCELED = LibC::ECANCELED

Value too large to be stored in data type

ECHILD = LibC::ECHILD

Bad file descriptor

ECONNABORTED = LibC::ECONNABORTED

Network dropped connection on reset

ECONNREFUSED = LibC::ECONNREFUSED

Operation timed out

ECONNRESET = LibC::ECONNRESET

Software caused connection abort

EDEADLK = LibC::EDEADLK

No child processes

EDESTADDRREQ = LibC::EDESTADDRREQ

Socket operation on non-socket

EDOM = LibC::EDOM

Broken pipe

EDQUOT = LibC::EDQUOT

Too many users

EEXIST = LibC::EEXIST

Device / Resource busy

EFAULT = LibC::EFAULT

Permission denied

EFBIG = LibC::EFBIG

Text file busy

EHOSTDOWN = LibC::EHOSTDOWN

File name too long

EHOSTUNREACH = LibC::EHOSTUNREACH

Host is down

EIDRM = LibC::EIDRM

Operation canceled

EILSEQ = LibC::EILSEQ

No message of desired type

EINPROGRESS = LibC::EINPROGRESS

Operation would block

EINTR = LibC::EINTR

No such process

EINVAL = LibC::EINVAL

Is a directory

EIO = LibC::EIO

Interrupted system call

EISCONN = LibC::EISCONN

No buffer space available

EISDIR = LibC::EISDIR

Not a directory

ELOOP = LibC::ELOOP

Connection refused

EMFILE = LibC::EMFILE

Too many open files in system

EMLINK = LibC::EMLINK

Read-only file system

EMSGSIZE = LibC::EMSGSIZE

Destination address required

EMULTIHOP = LibC::EMULTIHOP

Bad message

ENAMETOOLONG = LibC::ENAMETOOLONG

Too many levels of symbolic links

ENETDOWN = LibC::ENETDOWN

Can't assign requested address

ENETRESET = LibC::ENETRESET

Network is unreachable

ENETUNREACH = LibC::ENETUNREACH

Network is down

ENFILE = LibC::ENFILE

Invalid argument

ENOBUFS = LibC::ENOBUFS

Connection reset by peer

ENODATA = LibC::ENODATA

Reserved

ENODEV = LibC::ENODEV

Cross-device link

ENOENT = LibC::ENOENT

Operation not permitted

ENOEXEC = LibC::ENOEXEC

Device not configured

ENOLCK = LibC::ENOLCK

Too many levels of remote in path

ENOLINK = LibC::ENOLINK

No message available on STREAM

ENOMEM = LibC::ENOMEM

Resource deadlock avoided

ENOMSG = LibC::ENOMSG

Identifier removed

ENOPROTOOPT = LibC::ENOPROTOOPT

Protocol wrong type for socket

ENOSPC = LibC::ENOSPC

File too large

ENOSR = LibC::ENOSR

Reserved

ENOSTR = LibC::ENOSTR

No STREAM resources

ENOSYS = LibC::ENOSYS

No locks available

ENOTBLK = LibC::ENOTBLK

Bad address

ENOTCONN = LibC::ENOTCONN

Socket is already connected

ENOTDIR = LibC::ENOTDIR

Operation not supported by device

ENOTEMPTY = LibC::ENOTEMPTY

No route to host

ENOTRECOVERABLE = LibC::ENOTRECOVERABLE

Operation not supported on socket

ENOTSOCK = LibC::ENOTSOCK

Operation already in progress

ENOTTY = LibC::ENOTTY

Too many open files

ENXIO = LibC::ENXIO

Input/output error

EOPNOTSUPP = LibC::EOPNOTSUPP

STREAM ioctl timeout

EOVERFLOW = LibC::EOVERFLOW

Function not implemented

EOWNERDEAD = LibC::EOWNERDEAD

State not recoverable

EPERM = LibC::EPERM
EPFNOSUPPORT = LibC::EPFNOSUPPORT

Socket type not supported

EPIPE = LibC::EPIPE

Too many links

EPROTO = LibC::EPROTO

Not a STREAM

EPROTONOSUPPORT = LibC::EPROTONOSUPPORT

Protocol not available

EPROTOTYPE = LibC::EPROTOTYPE

Message too long

ERANGE = LibC::ERANGE

Numerical argument out of domain

EREMOTE = LibC::EREMOTE

Stale NFS file handle

EROFS = LibC::EROFS

Illegal seek

ESHUTDOWN = LibC::ESHUTDOWN

Socket is not connected

ESOCKTNOSUPPORT = LibC::ESOCKTNOSUPPORT

Protocol not supported

ESPIPE = LibC::ESPIPE

No space left on device

ESRCH = LibC::ESRCH

No such file or directory

ESTALE = LibC::ESTALE

Disc quota exceeded

ETIME = LibC::ETIME

Protocol error

ETIMEDOUT = LibC::ETIMEDOUT

Too many references: can't splice

ETOOMANYREFS = LibC::ETOOMANYREFS

Can't send after socket shutdown

ETXTBSY = LibC::ETXTBSY

Inappropriate ioctl for device

EUSERS = LibC::EUSERS

Directory not empty

EWOULDBLOCK = LibC::EWOULDBLOCK

Resource temporarily unavailable

EXDEV = LibC::EXDEV

File exists

Class Method Summary

Instance Method Summary

Instance methods inherited from class Exception

backtrace backtrace, backtrace? backtrace?, callstack : CallStack | Nil callstack, callstack=(callstack : CallStack | Nil) callstack=, cause : Exception | Nil cause, inspect_with_backtrace(io : IO)
inspect_with_backtrace inspect_with_backtrace, message : String | Nil message, to_s(io : IO) to_s

Class methods inherited from class Exception

new(message : String | Nil = nil, cause : Exception | Nil = nil) new

Instance methods inherited from class Reference

==(other)
==(other : self) ==, dup dup, hash hash, inspect(io : IO) : Nil inspect, object_id : UInt64 object_id, same?(other : Reference)
same?(other : Nil) same?, to_s(io : IO) : Nil to_s

Instance methods inherited from class Object

!=(other) !=, !~(other) !~, ==(other) ==, ===(other)
===(other : YAML::Any)
===(other : JSON::Any) ===, =~(other) =~, class class, crystal_type_id crystal_type_id, dup dup, hash hash, inspect(io : IO)
inspect inspect, itself itself, not_nil! not_nil!, tap(&block) tap, to_json to_json, to_pretty_json(io : IO)
to_pretty_json to_pretty_json, to_s
to_s(io : IO) to_s, to_yaml
to_yaml(io : IO) to_yaml, try(&block) try

Class methods inherited from class Object

==(other : Class) ==, ===(other) ===, cast(other) : self cast, clone clone, dup dup, from_json(string_or_io, root : String) : self
from_json(string_or_io) : self from_json, from_yaml(string : String) : self from_yaml, hash hash, inspect(io) inspect, name : String name, to_s(io) to_s, |(other : U.class) |

Class Method Detail

def self.value : LibC::Int #

Returns the value of libc's errno.


[View source]
def self.value=(value) #

Sets the value of libc's errno.


[View source]
def self.new(message) #

Creates a new Errno with the given message. The message will have concatenated the message denoted by Errno#value.

Typical usage:

err = LibC.some_call
if err == -1
  raise Errno.new("some_call")
end

[View source]

Instance Method Detail

def errno : Int32 #

Returns the numeric value of errno.


[View source]