POSIX 错误常量

常量	描述
`E2BIG`	表示参数列表比预期长。
`EACCES`	表示操作没有足够的权限。
`EADDRINUSE`	表示该网络地址已被使用。
`EADDRNOTAVAIL`	表示该网络地址当前不可用。
`EAFNOSUPPORT`	表示不支持网络地址族。
`EAGAIN`	表示没有可用数据，稍后再试操作。
`EALREADY`	指示套接字已经有正在进行的挂起连接。
`EBADF`	表示文件描述符无效。
`EBADMSG`	表示无效的数据消息。
`EBUSY`	表示设备或资源繁忙。
`ECANCELED`	表示操作被取消。
`ECHILD`	表示没有子进程。
`ECONNABORTED`	表示网络连接已中止。
`ECONNREFUSED`	表示网络连接已被拒绝。
`ECONNRESET`	表示网络连接已重置。
`EDEADLK`	表示避免了资源死锁。
`EDESTADDRREQ`	表示需要目标地址。
`EDOM`	表示参数超出了函数的域。
`EDQUOT`	表示已超出磁盘配额。
`EEXIST`	表示文件已经存在。
`EFAULT`	指示无效的指针地址。
`EFBIG`	表示文件过大。
`EHOSTUNREACH`	表示主机不可达。
`EIDRM`	表示该标识符已被删除。
`EILSEQ`	指示非法字节序列。
`EINPROGRESS`	表示操作已经在进行中。
`EINTR`	表示函数调用被中断。
`EINVAL`	表示提供了无效的参数。
`EIO`	表示未指定的 I/O 错误。
`EISCONN`	表示套接字已连接。
`EISDIR`	表示路径是目录。
`ELOOP`	表示路径中的符号链接级别过多。
`EMFILE`	表示打开的文件太多。
`EMLINK`	表示文件的硬链接过多。
`EMSGSIZE`	表示提供的消息太长。
`EMULTIHOP`	表示已尝试多跳。
`ENAMETOOLONG`	表示文件名太长。
`ENETDOWN`	表示网络已关闭。
`ENETRESET`	表示连接已被网络中止。
`ENETUNREACH`	表示网络不可达。
`ENFILE`	表示系统中打开的文件过多。
`ENOBUFS`	表示没有可用的缓冲区空间。
`ENODATA`	表示流头读取队列上没有可用的消息。
`ENODEV`	表示没有这样的设备。
`ENOENT`	表示没有这样的文件或目录。
`ENOEXEC`	表示 exec 格式错误。
`ENOLCK`	表示没有可用的锁。
`ENOLINK`	表示链接已被切断。
`ENOMEM`	表示空间不足。
`ENOMSG`	表示没有所需类型的消息。
`ENOPROTOOPT`	表示给定的协议不可用。
`ENOSPC`	表示设备上没有可用空间。
`ENOSR`	表示没有可用的流资源。
`ENOSTR`	表示给定的资源不是流。
`ENOSYS`	表示功能尚未实现。
`ENOTCONN`	表示套接字未连接。
`ENOTDIR`	表示路径不是目录。
`ENOTEMPTY`	表示目录不为空。
`ENOTSOCK`	表示给定的条目不是套接字。
`ENOTSUP`	表示不支持给定的操作。
`ENOTTY`	表示不适当的 I/O 控制操作。
`ENXIO`	表示没有这样的设备或地址。
`EOPNOTSUPP`	表示套接字不支持某个操作。尽管 `ENOTSUP` 和 `EOPNOTSUPP` 在 Linux 上具有相同的值，但根据 POSIX.1，这些错误值应该是不同的。
`EOVERFLOW`	表示值太大而无法存储在给定的数据类型中。
`EPERM`	表示不允许该操作。
`EPIPE`	表示管道破损。
`EPROTO`	表示协议错误。
`EPROTONOSUPPORT`	表示不支持协议。
`EPROTOTYPE`	标识套接字的错误协议类型。
`ERANGE`	表示结果过大。
`EROFS`	表示文件系统是只读的。
`ESPIPE`	指示无效的查找操作。
`ESRCH`	表示没有这样的进程。
`ESTALE`	表示文件句柄已过时。
`ETIME`	表示过期的定时器。
`ETIMEDOUT`	表示连接超时。
`ETXTBSY`	表示文本文件繁忙。
`EWOULDBLOCK`	表示操作会阻塞。
`EXDEV`	表示链接不正确。

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.