linux 下各errno的意义

strerror(errno)：获取errno对应的错误

#include <string.h> /* for strerror */
#include <errno.h>
#include <stdio.h>
 
int main(int argc, char ** argv)        {
        int i = ;
        for(i = ; i < ; i++)
        printf("errno.%02d is: %s/n", i, strerror(i));
        return ;
}

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 
 
errno42 :    No message of desired type
 
errno43 :    Identifier removed
 
errno44 :    Channel number out of range
 
errno45 :    Level  not synchronized
 
errno46 :    Level  halted
 
errno47 :    Level  reset
 
errno48 :    Link number out of range
 
errno49 :    Protocol driver not attached
 
errno50 :    No CSI structure available
 
errno51 :    Level  halted
 
errno52 :    Invalid exchange
 
errno53 :    Invalid request descriptor
 
errno54 :    Exchange full
 
errno55 :    No anode
 
errno56 :    Invalid request code
 
errno57 :    Invalid slot
 
errno58 :    Unknown error 
 
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 
 
errno134 :   Unknown error 
 
errno135 :   Unknown error 
 
errno136 :   Unknown error 
 
errno137 :   Unknown error 
 
errno138 :   Unknown error 
 
errno139 :   Unknown error 

具体宏定义如下：

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