POSIX 错误常量

【POSIX error constants】

Constant	Description
E2BIG	Indicates that the list of arguments is longer than expected.
EACCES	Indicates that the operation did not have sufficient permissions.
EADDRINUSE	Indicates that the network address is already in use.
EADDRNOTAVAIL	Indicates that the network address is currently unavailable for use.
EAFNOSUPPORT	Indicates that the network address family is not supported.
EAGAIN	Indicates that there is no data available and to try the operation again later.
EALREADY	Indicates that the socket already has a pending connection in progress.
EBADF	Indicates that a file descriptor is not valid.
EBADMSG	Indicates an invalid data message.
EBUSY	Indicates that a device or resource is busy.
ECANCELED	Indicates that an operation was canceled.
ECHILD	Indicates that there are no child processes.
ECONNABORTED	Indicates that the network connection has been aborted.
ECONNREFUSED	Indicates that the network connection has been refused.
ECONNRESET	Indicates that the network connection has been reset.
EDEADLK	Indicates that a resource deadlock has been avoided.
EDESTADDRREQ	Indicates that a destination address is required.
EDOM	Indicates that an argument is out of the domain of the function.
EDQUOT	Indicates that the disk quota has been exceeded.
EEXIST	Indicates that the file already exists.
EFAULT	Indicates an invalid pointer address.
EFBIG	Indicates that the file is too large.
EHOSTUNREACH	Indicates that the host is unreachable.
EIDRM	Indicates that the identifier has been removed.
EILSEQ	Indicates an illegal byte sequence.
EINPROGRESS	Indicates that an operation is already in progress.
EINTR	Indicates that a function call was interrupted.
EINVAL	Indicates that an invalid argument was provided.
EIO	Indicates an otherwise unspecified I/O error.
EISCONN	Indicates that the socket is connected.
EISDIR	Indicates that the path is a directory.
ELOOP	Indicates too many levels of symbolic links in a path.
EMFILE	Indicates that there are too many open files.
EMLINK	Indicates that there are too many hard links to a file.
EMSGSIZE	Indicates that the provided message is too long.
EMULTIHOP	Indicates that a multihop was attempted.
ENAMETOOLONG	Indicates that the filename is too long.
ENETDOWN	Indicates that the network is down.
ENETRESET	Indicates that the connection has been aborted by the network.
ENETUNREACH	Indicates that the network is unreachable.
ENFILE	Indicates too many open files in the system.
ENOBUFS	Indicates that no buffer space is available.
ENODATA	Indicates that no message is available on the stream head read queue.
ENODEV	Indicates that there is no such device.
ENOENT	Indicates that there is no such file or directory.
ENOEXEC	Indicates an exec format error.
ENOLCK	Indicates that there are no locks available.
ENOLINK	Indications that a link has been severed.
ENOMEM	Indicates that there is not enough space.
ENOMSG	Indicates that there is no message of the desired type.
ENOPROTOOPT	Indicates that a given protocol is not available.
ENOSPC	Indicates that there is no space available on the device.
ENOSR	Indicates that there are no stream resources available.
ENOSTR	Indicates that a given resource is not a stream.
ENOSYS	Indicates that a function has not been implemented.
ENOTCONN	Indicates that the socket is not connected.
ENOTDIR	Indicates that the path is not a directory.
ENOTEMPTY	Indicates that the directory is not empty.
ENOTSOCK	Indicates that the given item is not a socket.
ENOTSUP	Indicates that a given operation is not supported.
ENOTTY	Indicates an inappropriate I/O control operation.
ENXIO	Indicates no such device or address.
EOPNOTSUPP	Indicates that an operation is not supported on the socket. Although ENOTSUP and EOPNOTSUPP have the same value on Linux, according to POSIX.1 these error values should be distinct.)
EOVERFLOW	Indicates that a value is too large to be stored in a given data type.
EPERM	Indicates that the operation is not permitted.
EPIPE	Indicates a broken pipe.
EPROTO	Indicates a protocol error.
EPROTONOSUPPORT	Indicates that a protocol is not supported.
EPROTOTYPE	Indicates the wrong type of protocol for a socket.
ERANGE	Indicates that the results are too large.
EROFS	Indicates that the file system is read only.
ESPIPE	Indicates an invalid seek operation.
ESRCH	Indicates that there is no such process.
ESTALE	Indicates that the file handle is stale.
ETIME	Indicates an expired timer.
ETIMEDOUT	Indicates that the connection timed out.
ETXTBSY	Indicates that a text file is busy.
EWOULDBLOCK	Indicates that the operation would block.
EXDEV	Indicates an improper link.