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Linux中系统调用的错误都存储于errno中，errno由操作系统维护，存储就近发生的错误，下一次的错误码会覆盖掉上一次的错误。
#include//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char *strerror(int errnum);
#include//用来将上一个函数发生错误的原因输出到标准设备(stderr),参数s所指的字符串会先打印出,后面再加上错误原因字符串void perror(const char *s);
1 - 34错误码在/usr/include/asm-generic/errno-base.h文件中
35 - 133错误码在/usr/include/asm-generic/errno.h文件中| name | value | Description | 翻译 |
|---|---|---|---|
| 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 | 中断系统调用 |
| 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 | Argument list too long | 参数列表太长 |
| ENOEXEC | 8 | Exec format error | Exec格式错误 |
| EBADF | 9 | Bad file number | 错误的文件描述符 |
| 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 | 块设备要求 |
| EBUSY | 16 | Device or resource busy | 设备或资源忙 |
| EEXIST | 17 | File exists | 文件已经存在 |
| EXDEV | 18 | Invalid 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 | 文件表溢出 |
| EMFILE | 24 | Too many open files | 打开的文件太多 |
| ENOTTY | 25 | Not a typewriter | 在不支持 I/O 控制操作的文件或特殊文件上执行该操作。例如，不要尝试在目录上设置波特率。 |
| 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 | 非法的寻求 |
| 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 of func | 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 | 出现资源死锁 |
| ENAMETOOLONG | 36 | File name too long | 文件名太长 |
| ENOLCK | 37 | No record locks available | 没有可用的记录锁 |
| ENOSYS | 38 | Function not implemented | 功能没有实现 |
| ENOTEMPTY | 39 | Directory not empty | 目录非空 |
| ELOOP | 40 | Too many symbolic links encountered | 遇到太多的符号链接 |
| EWOULDBLOCK | 41 | Operation would block ；as EAGAIN | 操作将阻止 |
| ENOMSG | 42 | No message of desired type | 没有所需类型的消息 |
| EIDRM | 43 | Identifier removed | 标识符删除 |
| ECHRNG | 44 | Channel number out of range | 频道数超出范围 |
| 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 | 三级重置 |
| 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CSI结构可用 |
| EL2HLT | 51 | Level 2 halted | 2级中断 |
| EBADE | 52 | Invalid exchange | 无效的交换 |
| EBADR | 53 | Invalid request descriptor | 无效的请求描述符 |
| EXFULL | 54 | Exchange full | 交换完整的 |
| 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 | as EDEADLK | 和EDEADLK一样 |
| EBFONT | 59 | Bad font file format | 字体文件格式错误 |
| 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 | 链路已被切断 |
| EADV | 68 | Advertise error | 广告的错误 |
| ESRMNT | 69 | Srmount error | Srmount错误 |
| ECOMM | 70 | Communication error on send | 发送时通信错误 |
| 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 | 值对于定义的数据类型来说太大 |
| ENOTUNIQ | 76 | Name not unique on network | 名称在网络上不唯一 |
| 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 | Can not access a needed shared library | 无法访问所需的共享库 |
| ELIBBAD | 80 | Accessing a corrupted shared library | 访问损坏的共享库 |
| ELIBSCN | 81 | .lib section in a.out corrupted | .lib部分在.out上损坏的 |
| ELIBMAX | 82 | Attempting to link in too many shared libraries | 试图链接太多的共享库 |
| ELIBEXEC | 83 | Cannot exec a shared library directly | 无法直接执行共享库 |
| EILSEQ | 84 | Illegal byte sequence | 非法字节序列 |
| ERESTART | 85 | Interrupted system call should be restarted | 应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 | 太多的用户 |
| ENOTSOCK | 88 | Socket operation on non-socket | 非套接字上的套接字操作 |
| EDESTADDRREQ | 89 | Destination address required | 需要目的地址 |
| EMSGSIZE | 90 | Message too long | 消息太长 |
| EPROTOTYPE | 91 | Protocol wrong type for socket | 套接字的协议类型错误 |
| ENOPROTOOPT | 92 | Protocol not available | 协议不可用 |
| EPROTONOSUPPORT | 93 | Protocol not supported | 协议不支持 |
| ESOCKTNOSUPPORT | 94 | Socket type not supported | 套接字类型不受支持 |
| EOPNOTSUPP | 95 | Operation not supported on transport endpoint | 传输端点上不支持的操作 |
| EPFNOSUPPORT | 96 | Protocol family not supported | 不支持协议族 |
| EAFNOSUPPORT | 97 | Address family not supported by protocol | 协议不支持的地址族 |
| 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 | 网络中瘫痪 |
| ENETUNREACH | 101 | Network is unreachable | 网络是不可达 |
| ENETRESET | 102 | Network dropped connection because of reset | 网络由于复位而断开连接 |
| ECONNABORTED | 103 | Software caused connection abort | 软件导致连接中止 |
| ECONNRESET | 104 | Connection reset by peer | 对等点重置连接 |
| ENOBUFS | 105 | No buffer space available | 没有可用的缓冲区空间 |
| EISCONN | 106 | Transport endpoint is already connected | 传输端点已经连接 |
| ENOTCONN | 107 | Transport endpoint is not connected | 传输端点未连接 |
| ESHUTDOWN | 108 | Cannot send after transport endpoint shutdown | 传输端点关闭后无法发送 |
| ETOOMANYREFS | 109 | Too many references: cannot splice | 引用太多:不能拼接 |
| ETIMEDOUT | 110 | Connection timed out | 连接超时 |
| ECONNREFUSED | 111 | Connection refused | 连接拒绝 |
| EHOSTDOWN | 112 | Host is down | 主机已关闭 |
| EHOSTUNREACH | 113 | No route to host | 没有路由到主机 |
| EALREADY | 114 | Operation already in progress | 已运行 |
| EINPROGRESS | 115 | Operation now in progress | 正在运行 |
| ESTALE | 116 | Stale file handle | 过期文件句柄 |
| EUCLEAN | 117 | Structure needs cleaning | 结构需要清洗 |
| ENOTNAM | 118 | Not a XENIX named type file | 不是一个命名类型文件的XENIX |
| ENAVAIL | 119 | No XENIX semaphores available | 没有XENIX信号量可用 |
| 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I/O错误 |
| EDQUOT | 122 | Quota exceeded | 超出磁盘配额 |
| ENOMEDIUM | 123 | No medium found | 没有发现介质 |
| EMEDIUMTYPE | 124 | Wrong medium type | 错误的媒体类型 |
| ECANCELED | 125 | Operation Canceled | 操作取消 |
| ENOKEY | 126 | Required key not available | 所需键不可用 |
| EKEYEXPIRED | 127 | Key has expired | 键已经过期 |
| EKEYREVOKED | 128 | Key has been revoked | 键已被撤销 |
| EKEYREJECTED | 129 | Key was rejected by service | 键被服务拒绝 |
| EOWNERDEAD | 130 | Owner died | 所有者死亡 |
| ENOTRECOVERABLE | 131 | State not recoverable | 状态不可恢复的 |
| ERFKILL | 132 | Operation not possible due to RF-kill | 由于RF-kill而无法操作 |
| EHWPOISON | 133 | Memory page has hardware error | 内存页有硬件错误 |
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