Linux Socker errno

alex.lin

经常有同事问我，socket 错误之后打印的错误码是什么意思，每次都要解释，所以，索性整理一下，供大家查看

errno 是记录系统的最后一次错误代码。代码是一个int型的值，在errno.h中定义


注意：只有当一个库函数失败时，errno才会被设置。当函数成功运行时，errno的值不会被修改。这意味着我们不能通过测试errno的值来判断是否有错误存在。反之，只有当被调用的函数提示有错误发生时检查errno的值才有意义。

错误数

描述

errno0

Success

errno1

Operation not permitted

errno2

No such file or directory

errno3

No such process

errno4

Interrupted system call

errno5

Input/output error

errno6

No such device or address

errno7

Argument list too long

errno8

Exec format error

errno9

Bad file descriptor

errno10

No child processe

errno11

Resource temporarily unavailable

errno12

Cannot allocate memory

errno13

Permission denied

errno14

Bad address

errno15

Block device required

errno16

Device or resource busy

errno17

File exists

errno18

Invalid cross-device link

errno19

No such device

errno20

Not a directory

errno21

Is a directory

errno22

Invalid argument

errno23

Too many open files in system

errno24

Too many open files

errno25

Inappropriate ioctl for device

errno26

Text file busy

errno27

File too large

errno28

No space left on device

errno29

Illegal seek

errno30

Read-only file system

errno31

Too many links

errno32

Broken pipe

errno33

Numerical argument out of domain

errno34

Numerical result out of range

errno35

Resource deadlock avoided

errno36

File name too long

errno37

No locks available

errno38

Function not implemented

errno39

Directory not empty

errno40

Too many levels of symbolic links

errno41

Unknown error 41

errno42

No message of desired type

errno43

Identifier removed

errno44

Channel number out of range

errno45

Level 2 not synchronized

errno46

Level 3 halted

errno47

Level 3 reset

errno48

Link number out of range

errno49

Protocol driver not attached

errno50

No CSI structure available

errno51

Level 2 halted

errno52

Invalid exchange

errno53

Invalid request descriptor

errno54

Exchange full

errno55

No anode

errno56

Invalid request code

errno57

Invalid slot

errno58

Unknown error 58

errno59

Bad font file format

errno60

Device not a stream

errno61

No data available

errno62

Timer expired

errno63

Out of streams resources

errno64

Machine is not on the network

errno65

Package not installed

errno66

Object is remote

errno67

Link has been severed

errno68

Advertise error

errno69

Srmount error

errno70

Communication error on send

errno71

Protocol error

errno72

Multihop attempted

errno73

RFS specific error

errno74

Bad message

errno75

Value too large for defined datatype

errno76

Name not unique on network

errno77

File descriptor in bad state

errno78

Remote address changed

errno79

Can not access a needed sharedlibrary

errno80

Accessing a corrupted sharedlibrary

errno81

.lib section in a.out corrupted

errno82

Attempting to link in too manyshared libraries

errno83

Cannot exec a shared librarydirectly

errno84

Invalid or incomplete multibyte orwide character

errno85

Interrupted system call should berestarted

errno86

Streams pipe error

errno87

Too many users

errno88

Socket operation on non-socket

errno89

Destinationaddress required

errno90

Message too long

errno91

Protocol wrong type for socket

errno92

Protocol not available

errno93

Protocol not supported

errno94

Socket type not supported

errno95

Operation not supported

errno96

Protocol family not supported

errno97

Address family not supported byprotocol

errno98

Address already in use

errno99

Cannot assign requested address

errno100

Network is down

errno101

Network is unreachable

errno102

Network dropped connection onreset

errno103

Software caused connection abort

errno104

Connection reset by peer

errno105

No buffer space available

errno106

Transport endpoint is alreadyconnected

errno107

Transport endpoint is notconnected

errno108

Cannot send after transportendpoint shutdown

errno109

Too many references: cannot splice

errno110

Connection timed out

errno111

Connection refused

errno112

Host is down

errno113

No route to host

errno114

Operation already in progress

errno115

Operation now in progress

errno116

Stale NFS file handle

errno117

Structure needs cleaning

errno118

Not a XENIX named type file

errno119

No XENIX semaphores available

errno120

Is a named type file

errno121

Remote I/O error

errno122

Disk quota exceeded

errno123

No medium found

errno124

Wrong medium type

errno125

Operation canceled

errno126

Required key not available

errno127

Key has expired

errno128

Key has been revoked

errno129

Key was rejected by service

errno130

Owner died

errno131

State not recoverable

errno132

Operation not possible due toRF-kill

errno133

Unknown error 133

errno134

Unknown error 134

errno135

Unknown error 135

errno136

Unknown error 136

errno137

Unknown error 137

errno138

Unknown error 138

errno139

Unknown error 139