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最近在做工程的时候,程序在崩溃时候弹出了错误号,然后根据错误号搜索错误信息,很快解决之,特此记录。
在程序出错时,我们通过全局变量错误号errno和perror函数能够很快的定位到错误原因。
Linux错误代码及其含义
C Name | Value | Description | 含义 |
---|---|---|---|
Success | 0 | Success | 成功 |
EPERM | 1 | Operation not permitted | 操作不允许 |
ENOENT | 2 | No such file or directory | 没有这样的文件或目录 |
ESRCH | 3 | No such process | 没有这样的过程 |
EINTR | 4 | Interrupted system call | 系统调用被中断 |
EIO | 5 | I/O error | I/O错误 |
ENXIO | 6 | No such device or address | 没有这样的设备或地址 |
E2BIG | 7 | Arg list too long | 参数列表太长 |
ENOEXEC | 8 | Exec format error | 执行格式错误 |
EBADF | 9 | Bad file number | 坏的文件描述符 |
ECHILD | 10 | No child processes | 没有子进程 |
EAGAIN | 11 | Try again | 资源暂时不可用 |
ENOMEM | 12 | Out of memory | 内存溢出 |
EACCES | 13 | Permission denied | 拒绝许可 |
EFAULT | 14 | Bad address | 错误的地址 |
ENOTBLK | 15 | Block device required | 块设备请求 |
EBUSY | 16 | Device or resource busy | 设备或资源忙 |
EEXIST | 17 | File exists | 文件存在 |
EXDEV | 18 | Cross-device link | 无效的交叉链接 |
ENODEV | 19 | No such device | 设备不存在 |
ENOTDIR | 20 | Not a directory | 不是一个目录 |
EISDIR | 21 | Is a directory | 是一个目录 |
EINVAL | 22 | Invalid argument | 无效的参数 |
ENFILE* | 23 | File table overflow | 打开太多的文件系统 |
EMFILE | 24 | Too many open files | 打开的文件过多 |
ENOTTY | 25 | Not a tty device | 不是tty设备 |
ETXTBSY | 26 | Text file busy | 文本文件忙 |
EFBIG | 27 | File too large | 文件太大 |
ENOSPC | 28 | No space left on device | 设备上没有空间 |
ESPIPE | 29 | Illegal seek | 非法移位 |
EROFS | 30 | Read-only file system | 只读文件系统 |
EMLINK | 31 | Too many links | 太多的链接 |
EPIPE | 32 | Broken pipe | 管道破裂 |
EDOM | 33 | Math argument out of domain | 数值结果超出范围 |
ERANGE | 34 | Math result not representable | 数值结果不具代表性 |
EDEADLK | 35 | Resource deadlock would occur | 资源死锁错误 |
ENAMETOOLONG | 36 | Filename too long | 文件名太长 |
ENOLCK | 37 | No record locks available | 没有可用锁 |
ENOSYS | 38 | Function not implemented | 功能没有实现 |
ENOTEMPTY | 39 | Directory not empty | 目录不空 |
ELOOP | 40 | Too many symbolic links encountered | 符号链接层次太多 |
EWOULDBLOCK | 41 | Same as EAGAIN | 和EAGAIN一样 |
ENOMSG | 42 | No message of desired type | 没有期望类型的消息 |
EIDRM | 43 | Identifier removed | 标识符删除 |
ECHRNG | 44 | Channel number out of range | 频道数目超出范围 |
EL2NSYNC | 45 | Level 2 not synchronized | 2级不同步 |
EL3HLT | 46 | Level 3 halted | 3级中断 |
EL3RST | 47 | Level 3 reset | 3级复位 |
ELNRNG | 48 | Link number out of range | 链接数超出范围 |
EUNATCH | 49 | Protocol driver not attached | 协议驱动程序没有连接 |
ENOCSI | 50 | No CSI structure available | 没有可用CSI结构 |
EL2HLT | 51 | Level 2 halted | 2级中断 |
EBADE | 52 | Invalid exchange | 无效的交换 |
EBADR | 53 | Invalid request descriptor | 请求描述符无效 |
EXFULL | 54 | Exchange full | 交换全 |
ENOANO | 55 | No anode | 没有阳极 |
EBADRQC | 56 | Invalid request code | 无效的请求代码 |
EBADSLT | 57 | Invalid slot | 无效的槽 |
EDEADLOCK | 58 | Same as EDEADLK | 和EDEADLK一样 |
EBFONT | 59 | Bad font file format | 错误的字体文件格式 |
ENOSTR | 60 | Device not a stream | 设备不是字符流 |
ENODATA | 61 | No data available | 无可用数据 |
ETIME | 62 | Timer expired | 计时器过期 |
ENOSR | 63 | Out of streams resources | 流资源溢出 |
ENONET | 64 | Machine is not on the network | 机器不上网 |
ENOPKG | 65 | Package not installed | 没有安装软件包 |
EREMOTE | 66 | Object is remote | 对象是远程的 |
ENOLINK | 67 | Link has been severed | 联系被切断 |
EADV | 68 | Advertise error | 广告的错误 |
ESRMNT | 69 | Srmount error | srmount错误 |
ECOMM | 70 | Communication error on send | 发送时的通讯错误 |
EPROTO | 71 | Protocol error | 协议错误 |
EMULTIHOP | 72 | Multihop attempted | 多跳尝试 |
EDOTDOT | 73 | RFS specific error | RFS特定的错误 |
EBADMSG | 74 | Not a data message | 非数据消息 |
EOVERFLOW | 75 | Value too large for defined data type | 值太大,对于定义数据类型 |
ENOTUNIQ | 76 | Name not unique on network | 名不是唯一的网络 |
EBADFD | 77 | File descriptor in bad state | 文件描述符在坏状态 |
EREMCHG | 78 | Remote address changed | 远程地址改变了 |
ELIBACC | 79 | Cannot access a needed shared library | 无法访问必要的共享库 |
ELIBBAD | 80 | Accessing a corrupted shared library | 访问损坏的共享库 |
ELIBSCN | 81 | A .lib section in an .out is corrupted | 库段. out损坏 |
ELIBMAX | 82 | Linking in too many shared libraries | 试图链接太多的共享库 |
ELIBEXEC | 83 | Cannot exec a shared library directly | 不能直接执行一个共享库 |
EILSEQ | 84 | Illegal byte sequence | 无效的或不完整的多字节或宽字符 |
ERESTART | 85 | Interrupted system call should be restarted | 应该重新启动中断的系统调用 |
ESTRPIPE | 86 | Streams pipe error | 流管错误 |
EUSERS | 87 | Too many users | 用户太多 |
ENOTSOCK | 88 | Socket operation on non-socket | 套接字操作在非套接字上 |
EDESTADDRREQ | 89 | Destination address required | 需要目标地址 |
EMSGSIZE | 90 | Message too long | 消息太长 |
EPROTOTYPE | 91 | Protocol wrong type for socket | socket协议类型错误 |
ENOPROTOOPT | 92 | Protocol not available | 协议不可用 |
EPROTONOSUPPORT | 93 | Protocol not supported | 不支持的协议 |
ESOCKTNOSUPPORT | 94 | Socket type not supported | 套接字类型不受支持 |
EOPNOTSUPP | 95 | Operation not supported on transport | 不支持的操作 |
EPFNOSUPPORT | 96 | Protocol family not supported | 不支持的协议族 |
EAFNOSUPPORT | 97 | Address family not supported by protocol | 协议不支持的地址 |
EADDRINUSE | 98 | Address already in use | 地址已在使用 |
EADDRNOTAVAIL | 99 | Cannot assign requested address | 无法分配请求的地址 |
ENETDOWN | 100 | Network is down | 网络瘫痪 |
ENETUNREACH | 101 | Network is unreachable | 网络不可达 |
ENETRESET | 102 | Network dropped | 网络连接丢失 |
ECONNABORTED | 103 | Software caused connection | 软件导致连接中断 |
ECONNRESET | 104 | Connection reset by | 连接被重置 |
ENOBUFS | 105 | No buffer space available | 没有可用的缓冲空间 |
EISCONN | 106 | Transport endpoint | 传输端点已经连接 |
ENOTCONN | 107 | Transport endpoint | 传输终点没有连接 |
ESHUTDOWN | 108 | Cannot send after transport | 传输后无法发送 |
ETOOMANYREFS | 109 | Too many references | 太多的参考 |
ETIMEDOUT | 110 | Connection timed | 连接超时 |
ECONNREFUSED | 111 | Connection refused | 拒绝连接 |
EHOSTDOWN | 112 | Host is down | 主机已关闭 |
EHOSTUNREACH | 113 | No route to host | 没有主机的路由 |
EALREADY | 114 | Operation already | 已运行 |
EINPROGRESS | 115 | Operation now in | 正在运行 |
ESTALE | 116 | Stale NFS file handle | 陈旧的NFS文件句柄 |
EUCLEAN | 117 | Structure needs cleaning | 结构需要清洗 |
ENOTNAM | 118 | Not a XENIX-named | 不是XENIX命名的 |
ENAVAIL | 119 | No XENIX semaphores | 没有XENIX信号量 |
EISNAM | 120 | Is a named type file | 是一个命名的文件类型 |
EREMOTEIO | 121 | Remote I/O error | 远程输入/输出错误 |
EDQUOT | 122 | Quota exceeded | 超出磁盘配额 |
ENOMEDIUM | 123 | No medium found | 没有磁盘被发现 |
EMEDIUMTYPE | 124 | Wrong medium type | 错误的媒体类型 |
ECANCELED | 125 | Operation Canceled | 取消操作 |
ENOKEY | 126 | Required key not available | 所需键不可用 |
EKEYEXPIRED | 127 | Key has expired | 关键已过期 |
EKEYREVOKED | 128 | Key has been revoked | 关键被撤销 |
EKEYREJECTED | 129 | Key was rejected by service | 关键被拒绝服务 |
EOWNERDEAD | 130 | Owner died | 所有者死亡 |
ENOTRECOVERABLE | 131 | State not recoverable | 状态不可恢复 |
ERFKILL | 132 | Operation not possible due to RF-kill | 由于RF-kill而无法操作 |
暂时记录这么多,133-255全是Unknown error
二、错误处理函数
许多不同的函数库都在失败时设置全局变量errno的值来指明失败原因。值得注意的是函数报告出错后必须立刻检查errno变量,因为它有可能被下一个函数调用所覆盖。
有两个非常有用的函数可以用来报告出现的错误:
#include <string.>
char *strerror(int errnum);
该函数把错误代码映射为一个字符串,对错误类型进行说明。
#include <stdio.h>
void perror(const char *s);
该函数也把errno变量中报告的错误应为到一个字符串,并把它输出到标准错误输出流。
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