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errno含意

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errno含义
errno.h
#define EPERM 1 /* Operation not permitted */操作不允许
  #define ENOENT 2 /* No such file or directory */文件/路径不存在
  #define ESRCH 3 /* No such process */进程不存在
  #define EINTR 4 /* Interrupted system call */中断的系统调用
  #define EIO 5 /* I/O error */I/O错误
  #define ENXIO 6 /* No such device or address */设备/地址不存在
  #define E2BIG 7 /* Arg list too long */参数列表过长
  #define ENOEXEC 8 /* Exec format error */执行格式错误
  #define EBADF 9 /* Bad file number */错误文件编号
  #define ECHILD 10 /* No child processes */子进程不存在
  #define EAGAIN 11 /* Try again */重试
  #define ENOMEM 12 /* Out of memory */内存不足
  #define EACCES 13 /* Permission denied */无权限
  #define EFAULT 14 /* Bad address */地址错误
  #define ENOTBLK 15 /* Block device required */需要块设备
  #define EBUSY 16 /* Device or resource busy */设备或资源忙
  #define EEXIST 17 /* File exists */文件已存在
  #define EXDEV 18 /* Cross-device link */跨设备链路
  #define ENODEV 19 /* No such device */设备不存在
  #define ENOTDIR 20 /* Not a directory */路径不存在
  #define EISDIR 21 /* Is a directory */是路径
  #define EINVAL 22 /* Invalid argument */无效参数
  #define ENFILE 23 /* File table overflow */文件表溢出
  #define EMFILE 24 /* Too many open files */打开的文件过多
  #define ENOTTY 25 /* Not a typewriter */非打字机
  #define ETXTBSY 26 /* Text file busy */文本文件忙
  #define EFBIG 27 /* File too large */文件太大
  #define ENOSPC 28 /* No space left on device */设备无空间
  #define ESPIPE 29 /* Illegal seek */非法查询
  #define EROFS 30 /* Read-only file system */只读文件系统
  #define EMLINK 31 /* Too many links */链接太多
  #define EPIPE 32 /* Broken pipe */管道破裂
  #define EDOM 33 /* Math argument out of domain of func */参数超出函数域
  #define ERANGE 34 /* Math result not representable */结果无法表示
  #define EDEADLK 35 /* Resource deadlock would occur */资源将发生死锁
  #define ENAMETOOLONG 36 /* File name too long */文件名太长
  #define ENOLCK 37 /* No record locks available */没有可用的记录锁
  #define ENOSYS 38 /* Function not implemented */函数未实现
  #define ENOTEMPTY 39 /* Directory not empty */目录非空
  #define ELOOP 40 /* Too many symbolic links encountered */遇到太多符号链接
  #define EWOULDBLOCK EAGAIN /* Operation would block */操作会阻塞
  #define ENOMSG 42 /* No message of desired type */没有符合需求类型的消息
  #define EIDRM 43 /* Identifier removed */标识符已删除
  #define ECHRNG 44 /* Channel number out of range */通道编号超出范围
  #define EL2NSYNC 45 /* Level 2 not synchronized */level2不同步
  #define EL3HLT 46 /* Level 3 halted */3级停止
  #define EL3RST 47 /* Level 3 reset */3级重置
  #define ELNRNG 48 /* Link number out of range */链接编号超出范围
  #define EUNATCH 49 /* Protocol driver not attached */协议驱动程序没有连接
  #define ENOCSI 50 /* No CSI structure available */没有可用的CSI结构
  #define EL2HLT 51 /* Level 2 halted */2级停止
  #define EBADE 52 /* Invalid exchange */无效交换
  #define EBADR 53 /* Invalid request descriptor */无效请求描述
  #define EXFULL 54 /* Exchange full */交换完全
  #define ENOANO 55 /* No anode */无阳极
  #define EBADRQC 56 /* Invalid request code */无效请求码
  #define EBADSLT 57 /* Invalid slot */无效插槽
  #define EDEADLOCK EDEADLK
  #define EBFONT 59 /* Bad font file format */错误的字体文件格式
  #define ENOSTR 60 /* Device not a stream */设备不是流
  #define ENODATA 61 /* No data available */无数据
  #define ETIME 62 /* Timer expired */计时器到期
  #define ENOSR 63 /* Out of streams resources */流资源不足
  #define ENONET 64 /* Machine is not on the network */机器不在网络上
  #define ENOPKG 65 /* Package not installed */包未安装
  #define EREMOTE 66 /* Object is remote */对象是远程
  #define ENOLINK 67 /* Link has been severed */链接正在服务中
  #define EADV 68 /* Advertise error */广告错误
  #define ESRMNT 69 /* Srmount error */?
  #define ECOMM 70 /* Communication error on send */发送过程中通讯错误
  #define EPROTO 71 /* Protocol error */协议错误
  #define EMULTIHOP 72 /* Multihop attempted */多跳尝试
  #define EDOTDOT 73 /* RFS specific error */RFS特定错误
  #define EBADMSG 74 /* Not a data message */不是数据类型消息
  #define EOVERFLOW 75 /* Value too large for defined data type */对指定的数据类型来说值太大
  #define ENOTUNIQ 76 /* Name not unique on network */网络上名字不唯一
  #define EBADFD 77 /* File descriptor in bad state */文件描述符状态错误
  #define EREMCHG 78 /* Remote address changed */远程地址改变
  #define ELIBACC 79 /* Can not access a needed shared library */无法访问需要的共享库
  #define ELIBBAD 80 /* Accessing a corrupted shared library */访问损坏的共享库
  #define ELIBSCN 81 /* .lib section in a.out corrupted */库部分在a.out损坏
  #define ELIBMAX 82 /* Attempting to link in too many shared libraries */试图链接太多的共享库
  #define ELIBEXEC 83 /* Cannot exec a shared library directly */不能直接运行共享库
  #define EILSEQ 84 /* Illegal byte sequence */非法字节序
  #define ERESTART 85 /* Interrupted system call should be restarted */应重新启动被中断的系统调用
  #define ESTRPIPE 86 /* Streams pipe error */流管错误
  #define EUSERS 87 /* Too many users */用户太多
  #define ENOTSOCK 88 /* Socket operation on non-socket */在非套接字上进行套接字操作
  #define EDESTADDRREQ 89 /* Destination address required */需要目的地址
  #define EMSGSIZE 90 /* Message too long */消息太长
  #define EPROTOTYPE 91 /* Protocol wrong type for socket */错误协议类型
  #define ENOPROTOOPT 92 /* Protocol not available */协议不可用
  #define EPROTONOSUPPORT 93 /* Protocol not supported */不支持协议
  #define ESOCKTNOSUPPORT 94 /* Socket type not supported */不支持套接字类型
  #define EOPNOTSUPP 95 /* Operation not supported on transport endpoint */操作上不支持传输端点
  #define EPFNOSUPPORT 96 /* Protocol family not supported */不支持协议族
  #define EAFNOSUPPORT 97 /* Address family not supported by protocol */协议不支持地址群
  #define EADDRINUSE 98 /* Address already in use */地址已被使用
  #define EADDRNOTAVAIL 99 /* Cannot assign requested address */无法分配请求的地址
  #define ENETDOWN 100 /* Network is down */网络已关闭
  #define ENETUNREACH 101 /* Network is unreachable */网络不可达
  #define ENETRESET 102 /* Network dropped connection because of reset */网络由于复位断开连接
  #define ECONNABORTED 103 /* Software caused connection abort */软件导致连接终止
  #define ECONNRESET 104 /* Connection reset by peer */连接被对方复位
  #define ENOBUFS 105 /* No buffer space available */没有可用的缓存空间
  #define EISCONN 106 /* Transport endpoint is already connected */传输端点已连接
  #define ENOTCONN 107 /* Transport endpoint is not connected */传输端点未连接
  #define ESHUTDOWN 108 /* Cannot send after transport endpoint shutdown */传输端点关闭后不能在发送
  #define ETOOMANYREFS 109 /* Too many references: cannot splice */太多的引用:无法接合
  #define ETIMEDOUT 110 /* Connection timed out */连接超时
  #define ECONNREFUSED 111 /* Connection refused */连接被拒绝
  #define EHOSTDOWN 112 /* Host is down */主机已关闭
  #define EHOSTUNREACH 113 /* No route to host */无法路由到主机
  #define EALREADY 114 /* Operation already in progress */操作已在进程中
  #define EINPROGRESS 115 /* Operation now in progress */进程中正在进行的操作
  #define ESTALE 116 /* Stale NFS file handle */
  #define EUCLEAN 117 /* Structure needs cleaning */
  #define ENOTNAM 118 /* Not a XENIX named type file */
  #define ENAVAIL 119 /* No XENIX semaphores available */
  #define EISNAM 120 /* Is a named type file */
  #define EREMOTEIO 121 /* Remote I/O error */
  #define EDQUOT 122 /* Quota exceeded */
  #define ENOMEDIUM 123 /* No medium found */
  #define EMEDIUMTYPE 124 /* Wrong medium type */

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