Errno

Error Code

Description

EPERM

1

Operation not permitted

ENOENT

2

No such file or directory

ESRCH

3

No such process

EINTR

4

Interrupted system call

EIO

5

I/O error

ENXIO

6

No such device or address

E2BIG

7

Argument list too long

ENOEXEC

8

Exec format error

EBADF

9

Bad file number

ECHILD

10

No child processes

EAGAIN

11

Try again

ENOMEM

12

Out of memory

EACCES

13

Permission denied

EFAULT

14

Bad address

ENOTBLK

15

Block device required

EBUSY

16

Device or resource busy

EEXIST

17

File exists

EXDEV

18

Cross-device link

ENODEV

19

No such device

ENOTDIR

20

Not a directory

EISDIR

21

Is a directory

EINVAL

22

Invalid argument

ENFILE

23

File table overflow

EMFILE

24

Too many open files

ENOTTY

25

Not a typewriter

ETXTBSY

26

Text file busy

EFBIG

27

File too large

ENOSPC

28

No space left on device

ESPIPE

29

Illegal seek

EROFS

30

Read-only file system

EMLINK

31

Too many links

EPIPE

32

Broken pipe

EDOM

33

Math argument out of domain of func

ERANGE

34

Math result not representable

EDEADLK

35

Resource deadlock would occur

ENAMETOOLONG

36

File name too long

ENOLCK

37

No record locks available

ENOSYS

38

Function not implemented

ENOTEMPTY

39

Directory not empty

ELOOP

40

Too many symbolic links encountered

EWOULDBLOCK

41

Operation would block agai

ENOMSG

42

No message of desired type

EIDRM

43

Identifier removed

ECHRNG

44

Channel number out of range

EL2NSYNC

45

Level 2 not synchronized

EL3HLT

46

Level 3 halted

EL3RST

47

Level 3 reset

ELNRNG

48

Link number out of range

EUNATCH

49

Protocol driver not attached

ENOCSI

50

No CSI structure available

EL2HLT

51

Level 2 halted

EBADE

52

Invalid exchange

EBADR

53

Invalid request descriptor

EXFULL

54

Exchange full

ENOANO

55

No anode

EBADRQC

56

Invalid request code

EBADSLT

57

Invalid slot

EBFONT

59

Bad font file format

ENOSTR

60

Device not a stream

ENODATA

61

No data available

ETIME

62

Timer expired

ENOSR

63

Out of streams resources

ENONET

64

Machine is not on the network

ENOPKG

65

Package not installed

EREMOTE

66

Object is remote

ENOLINK

67

Link has been severed

EADV

68

Advertise error

ESRMNT

69

Srmount error

ECOMM

70

Communication error on send

EPROTO

71

Protocol error

EMULTIHOP

72

Multihop attempted

EDOTDOT

73

RFS specific error

EBADMSG

74

Not a data message

EOVERFLOW

75

Value too large for defined data type

ENOTUNIQ

76

Name not unique on network

EBADFD

77

File descriptor in bad state

EREMCHG

78

Remote address changed

ELIBACC

79

Can not access a needed shared library

ELIBBAD

80

Accessing a corrupted shared library

ELIBSCN

81

.lib section in a.out corrupted

ELIBMAX

82

Attempting to link in too many shared libraries

ELIBEXEC

83

Cannot exec a shared library directly

EILSEQ

84

Illegal byte sequence

ERESTART

85

Interrupted system call should be restarted

ESTRPIPE

86

Streams pipe error

EUSERS

87

Too many users

ENOTSOCK

88

Socket operation on non-socket

EDESTADDRREQ

89

Destination address required

EMSGSIZE

90

Message too long

EPROTOTYPE

91

Protocol wrong type for socket

ENOPROTOOPT

92

Protocol not available

EPROTONOSUPPORT

93

Protocol not supported

ESOCKTNOSUPPORT

94

Socket type not supported

EOPNOTSUPP

95

Operation not supported on transport endpoint

EPFNOSUPPORT

96

Protocol family not supported

EAFNOSUPPORT

97

Address family not supported by protocol

EADDRINUSE

98

Address already in use

EADDRNOTAVAIL

99

Cannot assign requested address

ENETDOWN

100

Network is down

ENETUNREACH

101

Network is unreachable

ENETRESET

102

Network dropped connection because of reset

ECONNABORTED

103

Software caused connection abort

ECONNRESET

104

Connection reset by peer

ENOBUFS

105

No buffer space available

EISCONN

106

Transport endpoint is already connected

ENOTCONN

107

Transport endpoint is not connected

ESHUTDOWN

108

Cannot send after transport endpoint shutdown

ETOOMANYREFS

109

Too many references: cannot splice

ETIMEDOUT

110

Connection timed out

ECONNREFUSED

111

Connection refused

EHOSTDOWN

112

Host is down

EHOSTUNREACH

113

No route to host

EALREADY

114

Operation already in progress

EINPROGRESS

115

Operation now in progress

ESTALE

116

Stale NFS file handle

EUCLEAN

117

Structure needs cleaning

ENOTNAM

118

Not a XENIX named type file

ENAVAIL

119

No XENIX semaphores available

EISNAM

120

Is a named type file

EREMOTEIO

121

Remote I/O error

EDQUOT

122

Quota exceeded

ENOMEDIUM

123

No medium found

EMEDIUMTYPE

124

Wrong medium type

ECANCELED

125

Operation Canceled

ENOKEY

126

Required key not available

EKEYEXPIRED

127

Key has expired

EKEYREVOKED

128

Key has been revoked

EKEYREJECTED

129

Key was rejected by service

EOWNERDEAD

130

Robust mutexes Owner died

ENOTRECOVERABLE

131

Robust mutexes State not recoverable