errno.h- -??????????????????????????????????????

查看錯誤代碼errno是調試程序的一個重要方法。當linuc C api函數發生異常時,一般會將errno變量(需include errno.h)賦一個整數值,不同的值表示不同的含義,可以通過查看該值推測出錯的原因。在實際編程中用這一招解決了不少原本看來莫名其妙的問題。比較麻煩的是每次都要去linux源代碼里面查找錯誤代碼的含義，現在把它貼出來，以后需要查時就來這里看了。
以下來自linux 2.4.20-18的內核代碼中的/usr/include/asm/errno.h
#ifndef _I386_ERRNO_H
#define _I386_ERRNO_H
#define EPERM?? 1 /* Operation not permitted */
#define ENOENT?? 2 /* 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 /* Arg list too long */
#define ENOEXEC?? 8 /* Exec format error */
#define EBADF?? 9 /* Bad file number */
#define ECHILD? 10 /* No child processes */
#define EAGAIN? 11 /* Try again */
#define ENOMEM? 12 /* Out of memory */
#define EACCES? 13 /* Permission denied */
#define EFAULT? 14 /* Bad address */
#define ENOTBLK? 15 /* Block device required */
#define EBUSY? 16 /* Device or resource busy */
#define EEXIST? 17 /* File exists */
#define EXDEV? 18 /* Cross-device link */
#define ENODEV? 19 /* No such device */
#define ENOTDIR? 20 /* Not a directory */
#define EISDIR? 21 /* Is a directory */
#define EINVAL? 22 /* Invalid argument */
#define ENFILE? 23 /* File table overflow */
#define EMFILE? 24 /* Too many open files */
#define ENOTTY? 25 /* Not a typewriter */
#define ETXTBSY? 26 /* Text file busy */
#define EFBIG? 27 /* File too large */
#define ENOSPC? 28 /* No space left on device */
#define ESPIPE? 29 /* Illegal seek */
#define EROFS? 30 /* Read-only file system */
#define EMLINK? 31 /* Too many links */
#define EPIPE? 32 /* Broken pipe */
#define EDOM? 33 /* Math argument out of domain of func */
#define ERANGE? 34 /* Math result not representable */
#define EDEADLK? 35 /* Resource deadlock would occur */
#define ENAMETOOLONG 36 /* File name too long */
#define ENOLCK? 37 /* No record locks available */
#define ENOSYS? 38 /* Function not implemented */
#define ENOTEMPTY 39 /* Directory not empty */
#define ELOOP? 40 /* Too many symbolic links encountered */
#define EWOULDBLOCK EAGAIN /* Operation would block */
#define ENOMSG? 42 /* No message of desired type */
#define EIDRM? 43 /* Identifier removed */
#define ECHRNG? 44 /* Channel number out of range */
#define EL2NSYNC 45 /* Level 2 not synchronized */
#define EL3HLT? 46 /* Level 3 halted */
#define EL3RST? 47 /* Level 3 reset */
#define ELNRNG? 48 /* Link number out of range */
#define EUNATCH? 49 /* Protocol driver not attached */
#define ENOCSI? 50 /* No CSI structure available */
#define EL2HLT? 51 /* Level 2 halted */
#define EBADE? 52 /* Invalid exchange */
#define EBADR? 53 /* Invalid request descriptor */
#define EXFULL? 54 /* Exchange full */
#define ENOANO? 55 /* No anode */
#define EBADRQC? 56 /* Invalid request code */
#define EBADSLT? 57 /* Invalid slot */
#define EDEADLOCK EDEADLK
#define EBFONT? 59 /* Bad font file format */
#define ENOSTR? 60 /* Device not a stream */
#define ENODATA? 61 /* No data available */
#define ETIME? 62 /* Timer expired */
#define ENOSR? 63 /* Out of streams resources */
#define ENONET? 64 /* Machine is not on the network */
#define ENOPKG? 65 /* Package not installed */
#define EREMOTE? 66 /* Object is remote */
#define ENOLINK? 67 /* Link has been severed */
#define EADV? 68 /* Advertise error */
#define ESRMNT? 69 /* Srmount error */
#define ECOMM? 70 /* Communication error on send */
#define EPROTO? 71 /* Protocol error */
#define EMULTIHOP 72 /* Multihop attempted */
#define EDOTDOT? 73 /* RFS specific error */
#define EBADMSG? 74 /* Not a data message */
#define EOVERFLOW 75 /* Value too large for defined data type */
#define ENOTUNIQ 76 /* Name not unique on network */
#define EBADFD? 77 /* File descriptor in bad state */
#define EREMCHG? 78 /* Remote address changed */
#define ELIBACC? 79 /* Can not access a needed shared library */
#define ELIBBAD? 80 /* Accessing a corrupted shared library */
#define ELIBSCN? 81 /* .lib section in a.out corrupted */
#define ELIBMAX? 82 /* Attempting to link in too many shared libraries */
#define ELIBEXEC 83 /* Cannot exec a shared library directly */
#define EILSEQ? 84 /* Illegal byte sequence */
#define ERESTART 85 /* Interrupted system call should be restarted */
#define ESTRPIPE 86 /* Streams pipe error */
#define EUSERS? 87 /* Too many users */
#define ENOTSOCK 88 /* Socket operation on non-socket */
#define EDESTADDRREQ 89 /* Destination address required */
#define EMSGSIZE 90 /* Message too long */
#define EPROTOTYPE 91 /* Protocol wrong type for socket */
#define ENOPROTOOPT 92 /* Protocol not available */
#define EPROTONOSUPPORT 93 /* Protocol not supported */
#define ESOCKTNOSUPPORT 94 /* Socket type not supported */
#define EOPNOTSUPP 95 /* Operation not supported on transport endpoint */
#define EPFNOSUPPORT 96 /* Protocol family not supported */
#define EAFNOSUPPORT 97 /* Address family not supported by protocol */
#define EADDRINUSE 98 /* Address already in use */
#define EADDRNOTAVAIL 99 /* Cannot assign requested address */
#define ENETDOWN 100 /* Network is down */
#define ENETUNREACH 101 /* Network is unreachable */
#define ENETRESET 102 /* Network dropped connection because of reset */
#define ECONNABORTED 103 /* Software caused connection abort */
#define ECONNRESET 104 /* Connection reset by peer */
#define ENOBUFS? 105 /* No buffer space available */
#define EISCONN? 106 /* Transport endpoint is already connected */
#define ENOTCONN 107 /* Transport endpoint is not connected */
#define ESHUTDOWN 108 /* Cannot send after transport endpoint shutdown */
#define ETOOMANYREFS 109 /* Too many references: cannot splice */
#define ETIMEDOUT 110 /* Connection timed out */
#define ECONNREFUSED 111 /* Connection refused */
#define EHOSTDOWN 112 /* Host is down */
#define EHOSTUNREACH 113 /* No route to host */
#define EALREADY 114 /* Operation already in progress */
#define EINPROGRESS 115 /* Operation now in progress */
#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 */
#endif

轉載于:https://www.cnblogs.com/riky/archive/2008/02/02/1062750.html

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