Standard library header <cerrno>

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This header was originally in the C standard library as <errno.h>.

This header is part of the error handling library.

Macros

macro which expands to POSIX-compatible thread-local error number variable
(macro variable)
E2BIG
(C++11)
Argument list too long
(macro constant)
EACCES
(C++11)
Permission denied
(macro constant)
EADDRINUSE
(C++11)
Address in use
(macro constant)
EADDRNOTAVAIL
(C++11)
Address not available
(macro constant)
EAFNOSUPPORT
(C++11)
Address family not supported
(macro constant)
EAGAIN
(C++11)
Resource unavailable, try again
(macro constant)
EALREADY
(C++11)
Connection already in progress
(macro constant)
EBADF
(C++11)
Bad file descriptor
(macro constant)
EBADMSG
(C++11)
Bad message
(macro constant)
EBUSY
(C++11)
Device or resource busy
(macro constant)
ECANCELED
(C++11)
Operation canceled
(macro constant)
ECHILD
(C++11)
No child processes
(macro constant)
ECONNABORTED
(C++11)
Connection aborted
(macro constant)
ECONNREFUSED
(C++11)
Connection refused
(macro constant)
ECONNRESET
(C++11)
Connection reset
(macro constant)
EDEADLK
(C++11)
Resource deadlock would occur
(macro constant)
EDESTADDRREQ
(C++11)
Destination address required
(macro constant)
EDOM
Mathematics argument out of domain of function
(macro constant)
EEXIST
(C++11)
File exists
(macro constant)
EFAULT
(C++11)
Bad address
(macro constant)
EFBIG
(C++11)
File too large
(macro constant)
EHOSTUNREACH
(C++11)
Host is unreachable
(macro constant)
EIDRM
(C++11)
Identifier removed
(macro constant)
EILSEQ
(C++11)
Illegal byte sequence
(macro constant)
EINPROGRESS
(C++11)
Operation in progress
(macro constant)
EINTR
(C++11)
Interrupted function
(macro constant)
EINVAL
(C++11)
Invalid argument
(macro constant)
EIO
(C++11)
I/O error
(macro constant)
EISCONN
(C++11)
Socket is connected
(macro constant)
EISDIR
(C++11)
Is a directory
(macro constant)
ELOOP
(C++11)
Too many levels of symbolic links
(macro constant)
EMFILE
(C++11)
File descriptor value too large
(macro constant)
EMLINK
(C++11)
Too many links
(macro constant)
EMSGSIZE
(C++11)
Message too large
(macro constant)
ENAMETOOLONG
(C++11)
Filename too long
(macro constant)
ENETDOWN
(C++11)
Network is down
(macro constant)
ENETRESET
(C++11)
Connection aborted by network
(macro constant)
ENETUNREACH
(C++11)
Network unreachable
(macro constant)
ENFILE
(C++11)
Too many files open in system
(macro constant)
ENOBUFS
(C++11)
No buffer space available
(macro constant)
ENODATA
(C++11)
No message is available on the STREAM head read queue
(macro constant)
ENODEV
(C++11)
No such device
(macro constant)
ENOENT
(C++11)
No such file or directory
(macro constant)
ENOEXEC
(C++11)
Executable file format error
(macro constant)
ENOLCK
(C++11)
No locks available
(macro constant)
ENOLINK
(C++11)
Link has been severed
(macro constant)
ENOMEM
(C++11)
Not enough space
(macro constant)
ENOMSG
(C++11)
No message of the desired type
(macro constant)
ENOPROTOOPT
(C++11)
Protocol not available
(macro constant)
ENOSPC
(C++11)
No space left on device
(macro constant)
ENOSR
(C++11)
No STREAM resources
(macro constant)
ENOSTR
(C++11)
Not a STREAM
(macro constant)
ENOSYS
(C++11)
Function not supported
(macro constant)
ENOTCONN
(C++11)
The socket is not connected
(macro constant)
ENOTDIR
(C++11)
Not a directory
(macro constant)
ENOTEMPTY
(C++11)
Directory not empty
(macro constant)
ENOTRECOVERABLE
(C++11)
State not recoverable
(macro constant)
ENOTSOCK
(C++11)
Not a socket
(macro constant)
ENOTSUP
(C++11)
Not supported
(macro constant)
ENOTTY
(C++11)
Inappropriate I/O control operation
(macro constant)
ENXIO
(C++11)
No such device or address
(macro constant)
EOPNOTSUPP
(C++11)
Operation not supported on socket
(macro constant)
EOVERFLOW
(C++11)
Value too large to be stored in data type
(macro constant)
EOWNERDEAD
(C++11)
Previous owner died
(macro constant)
EPERM
(C++11)
Operation not permitted
(macro constant)
EPIPE
(C++11)
Broken pipe
(macro constant)
EPROTO
(C++11)
Protocol error
(macro constant)
EPROTONOSUPPORT
(C++11)
Protocol not supported
(macro constant)
EPROTOTYPE
(C++11)
Protocol wrong type for socket
(macro constant)
ERANGE
Result too large
(macro constant)
EROFS
(C++11)
Read-only file system
(macro constant)
ESPIPE
(C++11)
Invalid seek
(macro constant)
ESRCH
(C++11)
No such process
(macro constant)
ETIME
(C++11)
Stream ioctl() timeout
(macro constant)
ETIMEDOUT
(C++11)
Connection timed out
(macro constant)
ETXTBSY
(C++11)
Text file busy
(macro constant)
EWOULDBLOCK
(C++11)
Operation would block
(macro constant)
EXDEV
(C++11)
Cross-device link
(macro constant)

Notes

Although the header <cerrno> is based on the C standard library header errno.h, the majority of the macros defined by <cerrno> were adopted by C++ from the POSIX standard, rather than the C standard library.

See Also