Error numbers
中定义的每个宏<cerrno>展开为具有类型的整数常量表达式。int，每个值都是正数，与大多数POSIX错误码定义了以下常量%28实现可以定义更多的常量，只要它们开始于'E'后面跟着数字或大写字母%29。
在标头中定义<cerrno>
*。
E2BIG%28C++11%29参数列表太长，%28宏常数%29
EACCES%28C++11%29权限被拒绝%28宏常量%29
使用中的EADDRINUSE%28C++11%29地址%28宏常数%29
EADDRNOTAVAIL%28C++11%29地址不可用%28宏常数%29
EAFNOSUPPORT%28C++11%29地址家庭不支持%28宏常数%29
EAGAIN%28C++11%29资源不可用，请重试%28宏常数%29
eodie%28C++11%29连接已在进行中%28宏常数%29
EBADF%28C++11%29坏文件描述符%28宏常数%29
EBADMSG%28C++11%29坏消息%28宏常数%29
EBUSY%28C++11%29设备或资源繁忙%28宏常数%29
ECANCELED%28C++11%29操作取消%28宏常数%29
ECHILD%28C++11%29没有子进程%28宏常数%29
终止%28宏常数%29的连接终止%28C++11%29
经济价值%28C++11%29连接拒绝%28宏常数%29
ECNNRESET%28C++11%29连接重置%28宏常数%29
EDEADLK%28C++11%29资源死锁将发生%28宏常数%29
EDESTADDRREQ%28C++11%29目标地址要求%28宏常数%29
Edom数学论证超出函数域%28宏常数%29
EEXIST%28C++11%29文件存在%28宏常量%29
EFAULT%28C++11%29坏地址%28宏常数%29
EFBIG%28C++11%29文件太大，%28宏常数%29
EHOSTUNEACH%28C++11%29主机不可达%28宏常数%29
EIDRM%28C++11%29标识符删除%28宏常数%29
EILSEQ%28C++11%29非法字节序列%28宏常数%29
EINPROGRESS%28C++11%29正在进行中的操作28宏常数%29
EINTR%28C++11%29中断函数%28宏常数%29
EINVAL%28C++11%29无效参数%28宏常数%29
EIO%28C++11%29 I/O错误%28宏常数%29
EISCONN%28C++11%29套接字连接%28宏常数%29
EISDIR%28C++11%29是目录%28宏常量%29
ELOOP%28C++11%29太多级别的符号链接%28宏常量%29
EMFILE%28C++11%29文件描述符值过大
EMLINK%28C++11%29太多链接%28宏常数%29
EMSGSIZE%28C++11%29消息太大%28宏常数%29
ENANAMETOOLONG%28C++11%29文件名过长%28宏常数%29
ENETDOWN%28C++11%29网络下降%28宏常数%29
网络%28宏常数%29中止的ENETRESET%28C++11%29连接
ENETUNEACH%28C++11%29网络不可达%28宏常数%29
在系统%28宏常量%29中打开的文件太多了
ENOBUFS%28C++11%29无可用缓冲区空间%28宏常数%29
ENODATA%28C++11%29在流头读取队列%28宏常量%29上没有消息可用
ENODEV%28C++11%29没有这类设备%28宏常数%29
ENOENT%28C++11%29没有这样的文件或目录%28宏常量%29
ENOEXEC%28C++11%29可执行文件格式错误%28宏常量%29
ENOLCK%28C++11%29无锁可用%28宏常数%29
ENOLINK%28C++11%29链接被切断%28宏常数%29
ENOMEM%28C++11%29不够空间%28宏常数%29
ENOMSG%28C++11%29没有所需类型的消息%28宏常量%29
ENOPROTOOPT%28C++11%29协议不可用%28宏常数%29
ENOSPC%28C++11%29设备上没有剩余空间28宏常数%29
ENOSR%28C++11%29无流资源%28宏常数%29
ENOSTR%28C++11%29不是流%28宏常数%29
ENOSYS%28C++11%29函数不支持%28宏常数%29
ENOTCONN%28C++11%29套接字未连接%28宏常数%29
ENOTDIR%28C++11%29不是目录%28宏常数%29
ENOTEMPTY%28C++11%29目录没有空%28宏常数%29
ENOTRECOVERABLE%28C++11%29状态不可恢复%28宏常数%29
ENOTSOCK%28C++11%29不是套接字%28宏常数%29
ENOTSUP%28C++11%29不支持%28宏常数%29
ENOTTY%28C++11%29不合适的I/O控制操作%28宏常数%29
ENXIO%28C++11%29没有这样的设备或地址%28宏常数%29
EOPNOTSUPP%28C++11%29不支持套接字%28宏常数%29的操作
EOVERFLOW%28C++11%29值太大，不能存储在数据类型%28宏常数%29中
前业主死亡百分比28宏常量%29
EPERM%28C++11%29操作不允许%28宏常数%29
EPIPE%28C++11%29断管%28宏常数%29
EPROTO%28C++11%29协议错误%28宏常数%29
EPROTONOSUPPORT%28C++11%29协议不支持%28宏常数%29
EPROTOTYPE%28C++11%29协议套接字%28宏常数%29错误类型
eRange结果太大，%28宏常数%29
EROFS%28C++11%29只读文件系统%28宏常量%29
ESPIPE%28C++11%29无效查找%28宏常数%29
ESRCH%28C++11%29没有这类进程%28宏常数%29
eTime%28C++11%29流ioctl%28%29超时%28宏常数%29
ETIMEDOUT%28C++11%29连接超时%28宏常数%29
ETXTBSY%28C++11%29文本文件忙%28宏常量%29
EWOULDBLOCK%28C++11%29操作将阻止%28宏常数%29
EXDEV%28C++11%29交叉设备链路%28宏常数%29
所有值都必须是唯一的，除非EOPNOTSUPP和ENOTSUP的值可能是相同的。EAGAIN和EWOULDBLOCK可能是一样的。
例
二次
#include <iostream>
#include <cmath>
#include <cerrno>
#include <cstring>
#include <clocale>
int main()
{
double not_a_number = std::log(-1.0);
if (errno == EDOM) {
std::cout << "log(-1) failed: " << std::strerror(errno) << '\n';
std::setlocale(LC_MESSAGES, "de_DE.utf8");
std::cout << "Or, in German, " << std::strerror(errno) << '\n';
}
}二次
可能的产出：
二次
log(-1) failed: Numerical argument out of domain
Or, in German, Das numerische Argument ist ausserhalb des Definitionsbereiches二次
另见
errc (C++11) | the std::error_condition enumeration listing all standard <cerrno> macro constants (class) |
|---|---|
errno | macro which expands to POSIX-compatible thread-local error number variable(macro variable) |
perror | displays a character string corresponding of the current error to stderr (function) |
strerror | returns a text version of a given error code (function) |
c错误编号文档
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