Error numbers
From cppreference.net
在头文件 <cerrno> 中定义的每个宏都会展开为具有 int 类型的整型常量表达式，每个表达式均为正值，与大多数 POSIX错误代码 相匹配。以下常量被定义（实现可以定义更多常量，只要它们以 'E' 后接数字或大写字母开头）。
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定义于头文件
<cerrno>
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E2BIG
(C++11)
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参数列表过长
(宏常量) |
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EACCES
(C++11)
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权限被拒绝
(宏常量) |
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EADDRINUSE
(C++11)
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地址已占用
(宏常量) |
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EADDRNOTAVAIL
(C++11)
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地址不可用
(宏常量) |
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EAFNOSUPPORT
(C++11)
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地址族不受支持
(宏常量) |
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EAGAIN
(C++11)
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资源暂时不可用，请重试
(宏常量) |
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EALREADY
(C++11)
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连接已在进行中
(宏常量) |
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EBADF
(C++11)
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错误的文件描述符
(宏常量) |
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EBADMSG
(C++11)
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错误消息
(宏常量) |
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EBUSY
(C++11)
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设备或资源忙
(宏常量) |
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ECANCELED
(C++11)
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操作已取消
(宏常量) |
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ECHILD
(C++11)
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无子进程
(宏常量) |
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ECONNABORTED
(C++11)
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连接已中止
(宏常量) |
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ECONNREFUSED
(C++11)
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连接被拒绝
(宏常量) |
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ECONNRESET
(C++11)
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连接被重置
(宏常量) |
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EDEADLK
(C++11)
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将发生资源死锁
(宏常量) |
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EDESTADDRREQ
(C++11)
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需要目标地址
(宏常量) |
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EDOM
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数学参数超出函数定义域
(宏常量) |
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EEXIST
(C++11)
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文件已存在
(宏常量) |
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EFAULT
(C++11)
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错误地址
(宏常量) |
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EFBIG
(C++11)
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文件过大
(宏常量) |
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EHOSTUNREACH
(C++11)
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主机不可达
(宏常量) |
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EIDRM
(C++11)
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标识符已移除
(宏常量) |
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EILSEQ
(C++11)
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非法字节序列
(宏常量) |
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EINPROGRESS
(C++11)
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操作正在进行中
(宏常量) |
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EINTR
(C++11)
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被中断的函数
(宏常量) |
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EINVAL
(C++11)
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无效参数
(宏常量) |
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EIO
(C++11)
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输入/输出错误
(宏常量) |
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EISCONN
(C++11)
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套接字已连接
(宏常量) |
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EISDIR
(C++11)
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是目录
(宏常量) |
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ELOOP
(C++11)
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符号链接层数过多
(宏常量) |
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EMFILE
(C++11)
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文件描述符数值过大
(宏常量) |
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EMLINK
(C++11)
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链接数过多
(宏常量) |
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EMSGSIZE
(C++11)
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消息过大
(宏常量) |
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ENAMETOOLONG
(C++11)
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文件名过长
(宏常量) |
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ENETDOWN
(C++11)
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网络不可用
(宏常量) |
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ENETRESET
(C++11)
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网络连接被中止
(宏常量) |
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ENETUNREACH
(C++11)
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网络不可达
(宏常量) |
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ENFILE
(C++11)
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系统中打开文件过多
(宏常量) |
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ENOBUFS
(C++11)
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无可用缓冲区空间
(宏常量) |
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ENODATA
(C++11)
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STREAM头读取队列中没有可用消息
(宏常量) |
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ENODEV
(C++11)
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无此设备
(宏常量) |
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ENOENT
(C++11)
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文件或目录不存在
(宏常量) |
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ENOEXEC
(C++11)
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可执行文件格式错误
(宏常量) |
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ENOLCK
(C++11)
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无可用锁
(宏常量) |
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ENOLINK
(C++11)
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链接已被切断
(宏常量) |
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ENOMEM
(C++11)
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内存不足
(宏常量) |
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ENOMSG
(C++11)
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无所需类型的消息
(宏常量) |
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ENOPROTOOPT
(C++11)
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协议不可用
(宏常量) |
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ENOSPC
(C++11)
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设备无剩余空间
(宏常量) |
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ENOSR
(C++11)
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无STREAM资源
(宏常量) |
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ENOSTR
(C++11)
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非流设备
(宏常量) |
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ENOSYS
(C++11)
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函数不支持
(宏常量) |
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ENOTCONN
(C++11)
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套接字未连接
(宏常量) |
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ENOTDIR
(C++11)
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非目录
(宏常量) |
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ENOTEMPTY
(C++11)
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目录非空
(宏常量) |
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ENOTRECOVERABLE
(C++11)
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状态不可恢复
(宏常量) |
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ENOTSOCK
(C++11)
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非套接字
(宏常量) |
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ENOTSUP
(C++11)
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不支持
(宏常量) |
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ENOTTY
(C++11)
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不适当的I/O控制操作
(宏常量) |
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ENXIO
(C++11)
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无此设备或地址
(宏常量) |
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EOPNOTSUPP
(C++11)
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套接字不支持该操作
(宏常量) |
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EOVERFLOW
(C++11)
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数值过大无法存入数据类型
(宏常量) |
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EOWNERDEAD
(C++11)
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前所有者已终止
(宏常量) |
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EPERM
(C++11)
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操作不允许
(宏常量) |
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EPIPE
(C++11)
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管道破裂
(宏常量) |
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EPROTO
(C++11)
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协议错误
(宏常量) |
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EPROTONOSUPPORT
(C++11)
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协议不受支持
(宏常量) |
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EPROTOTYPE
(C++11)
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协议类型与套接字不匹配
(宏常量) |
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ERANGE
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结果过大
(宏常量) |
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EROFS
(C++11)
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只读文件系统
(宏常量) |
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ESPIPE
(C++11)
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无效寻址
(宏常量) |
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ESRCH
(C++11)
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无此进程
(宏常量) |
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ETIME
(C++11)
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流 ioctl() 超时
(宏常量) |
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ETIMEDOUT
(C++11)
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连接超时
(宏常量) |
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ETXTBSY
(C++11)
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文本文件忙
(宏常量) |
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EWOULDBLOCK
(C++11)
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操作将被阻塞
(宏常量) |
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EXDEV
(C++11)
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跨设备链接
(宏常量) |
所有值都必须唯一，但
EOPNOTSUPP
和
ENOTSUP
的值可以相同，
EAGAIN
和
EWOULDBLOCK
的值也可以相同。
示例
运行此代码
#include <cerrno> #include <cstring> #include <iomanip> #include <iostream> #define SHOW(x) std::cout << std::setw(15) << #x << ": " << std::strerror(x) << '\n' int main() { std::cout << "Known error codes/messages:\n\n"; SHOW( E2BIG ); SHOW( EACCES ); SHOW( EADDRINUSE ); SHOW( EADDRNOTAVAIL ); SHOW( EAFNOSUPPORT ); SHOW( EAGAIN ); SHOW( EALREADY ); SHOW( EBADF ); SHOW( EBADMSG ); SHOW( EBUSY ); SHOW( ECANCELED ); SHOW( ECHILD ); SHOW( ECONNABORTED ); SHOW( ECONNREFUSED ); SHOW( ECONNRESET ); SHOW( EDEADLK ); SHOW( EDESTADDRREQ ); SHOW( EDOM ); SHOW( EEXIST ); SHOW( EFAULT ); SHOW( EFBIG ); SHOW( EHOSTUNREACH ); SHOW( EIDRM ); SHOW( EILSEQ ); SHOW( EINPROGRESS ); SHOW( EINTR ); SHOW( EINVAL ); SHOW( EIO ); SHOW( EISCONN ); SHOW( EISDIR ); SHOW( ELOOP ); SHOW( EMFILE ); SHOW( EMLINK ); SHOW( EMSGSIZE ); SHOW( ENAMETOOLONG ); SHOW( ENETDOWN ); SHOW( ENETRESET ); SHOW( ENETUNREACH ); SHOW( ENFILE ); SHOW( ENOBUFS ); SHOW( ENODATA ); SHOW( ENODEV ); SHOW( ENOENT ); SHOW( ENOEXEC ); SHOW( ENOLCK ); SHOW( ENOLINK ); SHOW( ENOMEM ); SHOW( ENOMSG ); SHOW( ENOPROTOOPT ); SHOW( ENOSPC ); SHOW( ENOSR ); SHOW( ENOSTR ); SHOW( ENOSYS ); SHOW( ENOTCONN ); SHOW( ENOTDIR ); SHOW( ENOTEMPTY ); SHOW( ENOTRECOVERABLE ); SHOW( ENOTSOCK ); SHOW( ENOTSUP ); SHOW( ENOTTY ); SHOW( ENXIO ); SHOW( EOPNOTSUPP ); SHOW( EOVERFLOW ); SHOW( EOWNERDEAD ); SHOW( EPERM ); SHOW( EPIPE ); SHOW( EPROTO ); SHOW( EPROTONOSUPPORT ); SHOW( EPROTOTYPE ); SHOW( ERANGE ); SHOW( EROFS ); SHOW( ESPIPE ); SHOW( ESRCH ); SHOW( ETIME ); SHOW( ETIMEDOUT ); SHOW( ETXTBSY ); SHOW( EWOULDBLOCK ); SHOW( EXDEV ); }
可能的输出：
Known error codes/messages:
E2BIG: Argument list too long
EACCES: Permission denied
EADDRINUSE: Address already in use
EADDRNOTAVAIL: Cannot assign requested address
EAFNOSUPPORT: Address family not supported by protocol
EAGAIN: Resource temporarily unavailable
EALREADY: Operation already in progress
EBADF: Bad file descriptor
EBADMSG: Bad message
EBUSY: Device or resource busy
ECANCELED: Operation canceled
ECHILD: No child processes
ECONNABORTED: Software caused connection abort
ECONNREFUSED: Connection refused
ECONNRESET: Connection reset by peer
EDEADLK: Resource deadlock avoided
EDESTADDRREQ: Destination address required
EDOM: Numerical argument out of domain
EEXIST: File exists
EFAULT: Bad address
EFBIG: File too large
EHOSTUNREACH: No route to host
EIDRM: Identifier removed
EILSEQ: Invalid or incomplete multibyte or wide character
EINPROGRESS: Operation now in progress
EINTR: Interrupted system call
EINVAL: Invalid argument
EIO: Input/output error
EISCONN: Transport endpoint is already connected
EISDIR: Is a directory
ELOOP: Too many levels of symbolic links
EMFILE: Too many open files
EMLINK: Too many links
EMSGSIZE: Message too long
ENAMETOOLONG: File name too long
ENETDOWN: Network is down
ENETRESET: Network dropped connection on reset
ENETUNREACH: Network is unreachable
ENFILE: Too many open files in system
ENOBUFS: No buffer space available
ENODATA: No data available
ENODEV: No such device
ENOENT: No such file or directory
ENOEXEC: Exec format error
ENOLCK: No locks available
ENOLINK: Link has been severed
ENOMEM: Cannot allocate memory
ENOMSG: No message of desired type
ENOPROTOOPT: Protocol not available
ENOSPC: No space left on device
ENOSR: Out of streams resources
ENOSTR: Device not a stream
ENOSYS: Function not implemented
ENOTCONN: Transport endpoint is not connected
ENOTDIR: Not a directory
ENOTEMPTY: Directory not empty
ENOTRECOVERABLE: State not recoverable
ENOTSOCK: Socket operation on non-socket
ENOTSUP: Operation not supported
ENOTTY: Inappropriate ioctl for device
ENXIO: No such device or address
EOPNOTSUPP: Operation not supported
EOVERFLOW: Value too large for defined data type
EOWNERDEAD: Owner died
EPERM: Operation not permitted
EPIPE: Broken pipe
EPROTO: Protocol error
EPROTONOSUPPORT: Protocol not supported
EPROTOTYPE: Protocol wrong type for socket
ERANGE: Numerical result out of range
EROFS: Read-only file system
ESPIPE: Illegal seek
ESRCH: No such process
ETIME: Timer expired
ETIMEDOUT: Connection timed out
ETXTBSY: Text file busy
EWOULDBLOCK: Resource temporarily unavailable
EXDEV: Invalid cross-device link
另请参阅
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(C++11)
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枚举所有标准
std::error_condition
错误条件，对应
<cerrno>
宏常量
(类) |
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扩展为POSIX兼容的线程局部错误编号变量
(宏变量) |
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将当前错误对应的字符串输出到
stderr
(函数) |
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返回给定错误码的文本描述
(函数) |
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错误编号
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