linux系统中errno对应的含义

errno 在 <errno.h> 中定义，错误 Exx 的宏定义在 /usr/include/asm-generic 文件夹下面的  errno-base.h 和 errno.h，分别定义了 1-34 、35-132 的错误定义。


strerror() 函数依据 errno 值返回错误描述字符串，下面程序打印对照表：


[cpp] view plain copy
#include <errno.h>  
#include <string.h>  
#include <stdio.h>  
  
int main()  
{  
    int i;  
    for(i = 0; i < 140; ++i)  
    {  
        errno = i;  
        printf("errno %d :\t\t%s\n",i,strerror(errno));  
    }  
    return 0;  
}  
错误对照表：
errno0 :     Success
errno1 :     Operation not permitted
errno2 :     No such file or directory
errno3 :     No such process
errno4 :     Interrupted system call
errno5 :     Input/output error
errno6 :     No such device or address
errno7 :     Argument list too long
errno8 :     Exec format error
errno9 :     Bad file descriptor
errno10 :    No child processes
errno11 :    Resource temporarily unavailable
errno12 :    Cannot allocate memory
errno13 :    Permission denied
errno14 :    Bad address
errno15 :    Block device required
errno16 :    Device or resource busy
errno17 :    File exists
errno18 :    Invalid cross-device link
errno19 :    No such device
errno20 :    Not a directory
errno21 :    Is a directory
errno22 :    Invalid argument
errno23 :    Too many open files in system
errno24 :    Too many open files
errno25 :    Inappropriate ioctl for device
errno26 :    Text file busy
errno27 :    File too large
errno28 :    No space left on device
errno29 :    Illegal seek
errno30 :    Read-only file system
errno31 :    Too many links
errno32 :    Broken pipe
errno33 :    Numerical argument out of domain
errno34 :    Numerical result out of range
errno35 :    Resource deadlock avoided
errno36 :    File name too long
errno37 :    No locks available
errno38 :    Function not implemented
errno39 :    Directory not empty
errno40 :    Too many levels of symbolic links
errno41 :    Unknown error 41
errno42 :    No message of desired type
errno43 :    Identifier removed
errno44 :    Channel number out of range
errno45 :    Level 2 not synchronized
errno46 :    Level 3 halted
errno47 :    Level 3 reset
errno48 :    Link number out of range
errno49 :    Protocol driver not attached
errno50 :    No CSI structure available
errno51 :    Level 2 halted
errno52 :    Invalid exchange
errno53 :    Invalid request descriptor
errno54 :    Exchange full
errno55 :    No anode
errno56 :    Invalid request code
errno57 :    Invalid slot
errno58 :    Unknown error 58
errno59 :    Bad font file format
errno60 :    Device not a stream
errno61 :    No data available
errno62 :    Timer expired
errno63 :    Out of streams resources
errno64 :    Machine is not on the network
errno65 :    Package not installed
errno66 :    Object is remote
errno67 :    Link has been severed
errno68 :    Advertise error
errno69 :    Srmount error
errno70 :    Communication error on send
errno71 :    Protocol error
errno72 :    Multihop attempted
errno73 :    RFS specific error
errno74 :    Bad message
errno75 :    Value too large for defined datatype
errno76 :    Name not unique on network
errno77 :    File descriptor in bad state
errno78 :    Remote address changed
errno79 :    Can not access a needed sharedlibrary
errno80 :    Accessing a corrupted sharedlibrary
errno81 :    .lib section in a.out corrupted


errno82 :    Attempting to link in too manyshared libraries


errno83 :    Cannot exec a shared librarydirectly


errno84 :    Invalid or incomplete multibyte orwide character


errno85 :    Interrupted system call should berestarted


errno86 :    Streams pipe error


errno87 :    Too many users


errno88 :    Socket operation on non-socket


errno89 :    Destinationaddress required


errno90 :    Message too long


errno91 :    Protocol wrong type for socket


errno92 :    Protocol not available


errno93 :    Protocol not supported


errno94 :    Socket type not supported


errno95 :    Operation not supported


errno96 :    Protocol family not supported


errno97 :    Address family not supported byprotocol


errno98 :    Address already in use


errno99 :    Cannot assign requested address


errno100 :   Network is down


errno101 :   Network is unreachable


errno102 :   Network dropped connection onreset


errno103 :   Software caused connection abort


errno104 :   Connection reset by peer


errno105 :   No buffer space available


errno106 :   Transport endpoint is alreadyconnected


errno107 :   Transport endpoint is notconnected


errno108 :   Cannot send after transportendpoint shutdown


errno109 :   Too many references: cannot splice


errno110 :   Connection timed out


errno111 :   Connection refused


errno112 :   Host is down


errno113 :   No route to host


errno114 :   Operation already in progress


errno115 :   Operation now in progress


errno116 :   Stale NFS file handle


errno117 :   Structure needs cleaning


errno118 :   Not a XENIX named type file


errno119 :   No XENIX semaphores available


errno120 :   Is a named type file


errno121 :   Remote I/O error


errno122 :   Disk quota exceeded


errno123 :   No medium found


errno124 :   Wrong medium type


errno125 :   Operation canceled


errno126 :   Required key not available


errno127 :   Key has expired


errno128 :   Key has been revoked


errno129 :   Key was rejected by service


errno130 :   Owner died


errno131 :   State not recoverable


errno132 :   Operation not possible due toRF-kill


errno133 :   Unknown error 133


errno134 :   Unknown error 134


errno135 :   Unknown error 135


errno136 :   Unknown error 136


errno137 :   Unknown error 137


errno138 :   Unknown error 138


errno139 :   Unknown error 139




由上可见Linux对错误宏的定义。


头文件 /usr/include/asm-generic/errno-base.h 的源码：


#ifndef _ASM_GENERIC_ERRNO_BASE_H
#define _ASM_GENERIC_ERRNO_BASE_H


#define EPERM  1 /* Operation not permitted */
#define ENOENT2
/* No such file or directory */
#define ESRCH  3 /* No such process */
#define EINTR  4 /* Interrupted system call */
#define EIO  5 /* I/O error */
#define ENXIO  6 /* No such device or address */
#define E2BIG  7 /* Argument list too long */
#define ENOEXEC8
/* Exec format error */
#define EBADF  9 /* Bad file number */
#define ECHILD10
/* No child processes */
#define EAGAIN11
/* Try again */
#define ENOMEM12
/* Out of memory */
#define EACCES13
/* Permission denied */
#define EFAULT14
/* Bad address */
#define ENOTBLK15
/* Block device required */
#define EBUSY  16 /* Device or resource busy */
#define EEXIST17
/* File exists */
#define EXDEV  18 /* Cross-device link */
#define ENODEV19
/* No such device */
#define ENOTDIR20
/* Not a directory */
#define EISDIR21
/* Is a directory */
#define EINVAL22
/* Invalid argument */
#define ENFILE23
/* File table overflow */
#define EMFILE24
/* Too many open files */
#define ENOTTY25
/* Not a typewriter */
#define ETXTBSY26
/* Text file busy */
#define EFBIG  27 /* File too large */
#define ENOSPC28
/* No space left on device */
#define ESPIPE29
/* Illegal seek */
#define EROFS  30 /* Read-only file system */
#define EMLINK31
/* Too many links */
#define EPIPE  32 /* Broken pipe */
#define EDOM  33 /* Math argument out of domain of func */
#define ERANGE34
/* Math result not representable */


#endif


头文件/usr/include/asm-generic/erno.h源码：


#ifndef _ASM_GENERIC_ERRNO_H
#define _ASM_GENERIC_ERRNO_H


#include <asm-generic/errno-base.h>


#define EDEADLK35
/* Resource deadlock would occur */
#define ENAMETOOLONG36
/* File name too long */
#define ENOLCK37
/* No record locks available */
#define ENOSYS38
/* Function not implemented */
#define ENOTEMPTY39
/* Directory not empty */
#define ELOOP  40 /* Too many symbolic links encountered */
#define EWOULDBLOCKEAGAIN
/* Operation would block */
#define ENOMSG42
/* No message of desired type */
#define EIDRM  43 /* Identifier removed */
#define ECHRNG44
/* Channel number out of range */
#define EL2NSYNC45
/* Level 2 not synchronized */
#define EL3HLT46
/* Level 3 halted */
#define EL3RST47
/* Level 3 reset */
#define ELNRNG48
/* Link number out of range */
#define EUNATCH49
/* Protocol driver not attached */
#define ENOCSI50
/* No CSI structure available */
#define EL2HLT51
/* Level 2 halted */
#define EBADE  52 /* Invalid exchange */
#define EBADR  53 /* Invalid request descriptor */
#define EXFULL54
/* Exchange full */
#define ENOANO55
/* No anode */
#define EBADRQC56
/* Invalid request code */
#define EBADSLT57
/* Invalid slot */


#define EDEADLOCKEDEADLK


#define EBFONT59
/* Bad font file format */
#define ENOSTR60
/* Device not a stream */
#define ENODATA61
/* No data available */
#define ETIME  62 /* Timer expired */
#define ENOSR  63 /* Out of streams resources */
#define ENONET64
/* Machine is not on the network */
#define ENOPKG65
/* Package not installed */
#define EREMOTE66
/* Object is remote */
#define ENOLINK67
/* Link has been severed */
#define EADV  68 /* Advertise error */
#define ESRMNT69
/* Srmount error */
#define ECOMM  70 /* Communication error on send */
#define EPROTO71
/* Protocol error */
#define EMULTIHOP72
/* Multihop attempted */
#define EDOTDOT73
/* RFS specific error */
#define EBADMSG74
/* Not a data message */
#define EOVERFLOW75
/* Value too large for defined data type */
#define ENOTUNIQ76
/* Name not unique on network */
#define EBADFD77
/* File descriptor in bad state */
#define EREMCHG78
/* Remote address changed */
#define ELIBACC79
/* Can not access a needed shared library */
#define ELIBBAD80
/* Accessing a corrupted shared library */
#define ELIBSCN81
/* .lib section in a.out corrupted */
#define ELIBMAX82
/* Attempting to link in too many shared libraries */
#define ELIBEXEC83
/* Cannot exec a shared library directly */
#define EILSEQ84
/* Illegal byte sequence */
#define ERESTART85
/* Interrupted system call should be restarted */
#define ESTRPIPE86
/* Streams pipe error */
#define EUSERS87
/* Too many users */
#define ENOTSOCK88
/* Socket operation on non-socket */
#define EDESTADDRREQ89
/* Destination address required */
#define EMSGSIZE90
/* Message too long */
#define EPROTOTYPE91
/* Protocol wrong type for socket */
#define ENOPROTOOPT92
/* Protocol not available */
#define EPROTONOSUPPORT93
/* Protocol not supported */
#define ESOCKTNOSUPPORT94
/* Socket type not supported */
#define EOPNOTSUPP95
/* Operation not supported on transport endpoint */
#define EPFNOSUPPORT96
/* Protocol family not supported */
#define EAFNOSUPPORT97
/* Address family not supported by protocol */
#define EADDRINUSE98
/* Address already in use */
#define EADDRNOTAVAIL99
/* Cannot assign requested address */
#define ENETDOWN100
/* Network is down */
#define ENETUNREACH101
/* Network is unreachable */
#define ENETRESET102
/* Network dropped connection because of reset */
#define ECONNABORTED103
/* Software caused connection abort */
#define ECONNRESET104
/* Connection reset by peer */
#define ENOBUFS105
/* No buffer space available */
#define EISCONN106
/* Transport endpoint is already connected */
#define ENOTCONN107
/* Transport endpoint is not connected */
#define ESHUTDOWN108
/* Cannot send after transport endpoint shutdown */
#define ETOOMANYREFS109
/* Too many references: cannot splice */
#define ETIMEDOUT110
/* Connection timed out */
#define ECONNREFUSED111
/* Connection refused */
#define EHOSTDOWN112
/* Host is down */
#define EHOSTUNREACH113
/* No route to host */
#define EALREADY114
/* Operation already in progress */
#define EINPROGRESS115
/* Operation now in progress */
#define ESTALE116
/* Stale NFS file handle */
#define EUCLEAN117
/* Structure needs cleaning */
#define ENOTNAM118
/* Not a XENIX named type file */
#define ENAVAIL119
/* No XENIX semaphores available */
#define EISNAM120
/* Is a named type file */
#define EREMOTEIO121
/* Remote I/O error */
#define EDQUOT122
/* Quota exceeded */


#define ENOMEDIUM123
/* No medium found */
#define EMEDIUMTYPE124
/* Wrong medium type */
#define ECANCELED125
/* Operation Canceled */
#define ENOKEY126
/* Required key not available */
#define EKEYEXPIRED127
/* Key has expired */
#define EKEYREVOKED128
/* Key has been revoked */
#define EKEYREJECTED129
/* Key was rejected by service */


/* for robust mutexes */
#define EOWNERDEAD130
/* Owner died */
#define ENOTRECOVERABLE131
/* State not recoverable */


#define ERFKILL 132/* Operation not possible due to RF-kill */


#endif