Linux/Unix Errno Code
我本地環境為 Ubuntu 12.10
Errno Code 自然是寫在 errno.h 中，不過簡直是茫茫多的 errno.h 檔案啊！
/usr/lnclude/errno.h
/usr/include/linux/errno.h
/usr/include/asm-generic/errno.h
/usr/include/i386-linux-gnu/sys/errno.h
/usr/include/i386-linux-gnu/bits/errno.h
/usr/include/i386-linux-gnu/asm/errno.h
/usr/src/linux-headers-3.5.0-22/include/linux/errno.h
/usr/src/linux-headers-3.5.0-22/include/asm-generic/errno.h
/usr/src/linux-headers-3.5.0-22-generic/include/linux/errno.h
/usr/src/linux-headers-3.5.0-22/arch/xtensa/include/linux/errno.h
/usr/src/linux-headers-3.5.0-22/arch/cris/include/linux/errno.h
/usr/src/linux-headers-3.5.0-22/arch/m32r/include/linux/errno.h
/usr/src/linux-headers-3.5.0-22/arch/avr32/include/linux/errno.h
/usr/src/linux-headers-3.5.0-22/arch/microblaze/include/linux/errno.h
/usr/src/linux-headers-3.5.0-22/arch/mn10300/include/linux/errno.h
/usr/src/linux-headers-3.5.0-22/arch/ia64/include/linux/errno.h
/usr/src/linux-headers-3.5.0-22/arch/score/include/linux/errno.h
/usr/src/linux-headers-3.5.0-22/arch/frv/include/linux/errno.h
/usr/src/linux-headers-3.5.0-22/arch/arm/mach-bcmring/include/csp/errno.h
/usr/src/linux-headers-3.5.0-22/arch/mips/include/linux/errno.h
/usr/src/linux-headers-3.5.0-22/arch/m68k/include/linux/errno.h
/usr/src/linux-headers-3.5.0-22/arch/x86/include/linux/errno.h
/usr/src/linux-headers-3.5.0-22/arch/parisc/include/linux/errno.h
/usr/src/linux-headers-3.5.0-22/arch/sparc/include/linux/errno.h
/usr/src/linux-headers-3.5.0-22/arch/s390/include/linux/errno.h
/usr/src/linux-headers-3.5.0-22/arch/powerpc/include/linux/errno.h
/usr/src/linux-headers-3.5.0-22/arch/alpha/include/linux/errno.h
後面這些彷彿都是原始碼，真正要找的應該是前六個。
/usr/lnclude/errno.h 是一個空殼
/usr/include/linux/errno.h 更空的一個殼
/usr/include/asm-generic/errno.h 這裡有35-133號的錯誤碼
/usr/include/i386-linux-gnu/sys/errno.h
/usr/include/i386-linux-gnu/bits/errno.h
/usr/include/i386-linux-gnu/asm/errno.h
很鬱悶，再找找其他的。
另找了一臺，系統為 Linux version 2.6.32，清晰多了。
/usr/include/errno.h -->
/usr/include/bits/errno.h -->
/usr/include/linux/errno.h -->
/usr/include/asm/errno.h -->
/usr/include/asm-generic/errno.h -->
/usr/include/asm-generic/errno-base.h
/usr/include/asm-generic/errno-base.h 中
#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 /* Argument 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 */
/usr/include/asm-generic/errno.h 中定義了主要的錯誤碼：
#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 */
#define ECANCELED 125 /* Operation Canceled */
#define ENOKEY 126 /* Required key not available */
#define EKEYEXPIRED 127 /* Key has expired */
#define EKEYREVOKED 128 /* Key has been revoked */
#define EKEYREJECTED 129 /* Key was rejected by service */
/* for robust mutexes */
#define EOWNERDEAD 130 /* Owner died */
#define ENOTRECOVERABLE 131 /* State not recoverable */
#define ERFKILL 132 /* Operation not possible due to RF-kill */
#define EHWPOISON 133 /* Memory page has hardware error */
/usr/include/bits/errno.h
/* Linux has no ENOTSUP error code. */
# define ENOTSUP EOPNOTSUPP
/* Older Linux versions also had no ECANCELED error code. */
# ifndef ECANCELED
# define ECANCELED 125
# endif
/* Support for error codes to support robust mutexes was added later, too. */
# ifndef EOWNERDEAD
# define EOWNERDEAD 130
# define ENOTRECOVERABLE 131
# endif
# ifndef ERFKILL
# define ERFKILL 132
# endif
#if !defined _ERRNO_H && defined __need_Emath
/* This is ugly but the kernel header is not clean enough. We must
define only the values EDOM, EILSEQ and ERANGE in case __need_Emath is
defined. */
# define EDOM 33 /* Math argument out of domain of function. */
# define EILSEQ 84 /* Illegal byte sequence. */
# define ERANGE 34 /* Math result not representable. */
#endif /* !_ERRNO_H && __need_Emath */
相對的，MacOSX中，errno.h少的多，分別是：
/usr/include/errno.h
/usr/include/sys/errno.h
前者是後者的殼，後者中定義了所有的Errno Code
#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 /* Input/output error */
#define ENXIO 6 /* Device not configured */
#define E2BIG 7 /* Argument list too long */
#define ENOEXEC 8 /* Exec format error */
#define EBADF 9 /* Bad file descriptor */
#define ECHILD 10 /* No child processes */
#define EDEADLK 11 /* Resource deadlock avoided */
/* 11 was EAGAIN */
#define ENOMEM 12 /* Cannot allocate memory */
#define EACCES 13 /* Permission denied */
#define EFAULT 14 /* Bad address */
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define ENOTBLK 15 /* Block device required */
#endif
#define EBUSY 16 /* Device / Resource busy */
#define EEXIST 17 /* File exists */
#define EXDEV 18 /* Cross-device link */
#define ENODEV 19 /* Operation not supported by device */
#define ENOTDIR 20 /* Not a directory */
#define EISDIR 21 /* Is a directory */
#define EINVAL 22 /* Invalid argument */
#define ENFILE 23 /* Too many open files in system */
#define EMFILE 24 /* Too many open files */
#define ENOTTY 25 /* Inappropriate ioctl for device */
#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 /* Numerical argument out of domain */
#define ERANGE 34 /* Result too large */
#define EAGAIN 35 /* Resource temporarily unavailable */
#define EWOULDBLOCK EAGAIN /* Operation would block */
#define EINPROGRESS 36 /* Operation now in progress */
#define EALREADY 37 /* Operation already in progress */
#define ENOTSOCK 38 /* Socket operation on non-socket */
#define EDESTADDRREQ 39 /* Destination address required */
#define EMSGSIZE 40 /* Message too long */
#define EPROTOTYPE 41 /* Protocol wrong type for socket */
#define ENOPROTOOPT 42 /* Protocol not available */
#define EPROTONOSUPPORT 43 /* Protocol not supported */
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define ESOCKTNOSUPPORT 44 /* Socket type not supported */
#endif
#define ENOTSUP 45 /* Operation not supported */
#if !__DARWIN_UNIX03 && !defined(KERNEL)
#define EOPNOTSUPP ENOTSUP /* Operation not supported on socket */
#endif /* !__DARWIN_UNIX03 && !KERNEL */
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define EPFNOSUPPORT 46 /* Protocol family not supported */
#endif
#define EAFNOSUPPORT 47 /* Address family not supported by protocol family */
#define EADDRINUSE 48 /* Address already in use */
#define EADDRNOTAVAIL 49 /* Can't assign requested address */
/* ipc/network software -- operational errors */
#define ENETDOWN 50 /* Network is down */
#define ENETUNREACH 51 /* Network is unreachable */
#define ENETRESET 52 /* Network dropped connection on reset */
#define ECONNABORTED 53 /* Software caused connection abort */
#define ECONNRESET 54 /* Connection reset by peer */
#define ENOBUFS 55 /* No buffer space available */
#define EISCONN 56 /* Socket is already connected */
#define ENOTCONN 57 /* Socket is not connected */
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define ESHUTDOWN 58 /* Can't send after socket shutdown */
#define ETOOMANYREFS 59 /* Too many references: can't splice */
#endif
#define ETIMEDOUT 60 /* Operation timed out */
#define ECONNREFUSED 61 /* Connection refused */
#define ELOOP 62 /* Too many levels of symbolic links */
#define ENAMETOOLONG 63 /* File name too long */
/* should be rearranged */
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define EHOSTDOWN 64 /* Host is down */
#endif
#define EHOSTUNREACH 65 /* No route to host */
#define ENOTEMPTY 66 /* Directory not empty */
/* quotas & mush */
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define EPROCLIM 67 /* Too many processes */
#define EUSERS 68 /* Too many users */
#endif
#define EDQUOT 69 /* Disc quota exceeded */
/* Network File System */
#define ESTALE 70 /* Stale NFS file handle */
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define EREMOTE 71 /* Too many levels of remote in path */
#define EBADRPC 72 /* RPC struct is bad */
#define ERPCMISMATCH 73 /* RPC version wrong */
#define EPROGUNAVAIL 74 /* RPC prog. not avail */
#define EPROGMISMATCH 75 /* Program version wrong */
#define EPROCUNAVAIL 76 /* Bad procedure for program */
#endif
#define ENOLCK 77 /* No locks available */
#define ENOSYS 78 /* Function not implemented */
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define EFTYPE 79 /* Inappropriate file type or format */
#define EAUTH 80 /* Authentication error */
#define ENEEDAUTH 81 /* Need authenticator */
/* Intelligent device errors */
#define EPWROFF 82 /* Device power is off */
#define EDEVERR 83 /* Device error, e.g. paper out */
#endif
#define EOVERFLOW 84 /* Value too large to be stored in data type */
/* Program loading errors */
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define EBADEXEC 85 /* Bad executable */
#define EBADARCH 86 /* Bad CPU type in executable */
#define ESHLIBVERS 87 /* Shared library version mismatch */
#define EBADMACHO 88 /* Malformed Macho file */
#endif
#define ECANCELED 89 /* Operation canceled */
#define EIDRM 90 /* Identifier removed */
#define ENOMSG 91 /* No message of desired type */
#define EILSEQ 92 /* Illegal byte sequence */
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define ENOATTR 93 /* Attribute not found */
#endif
#define EBADMSG 94 /* Bad message */
#define EMULTIHOP 95 /* Reserved */
#define ENODATA 96 /* No message available on STREAM */
#define ENOLINK 97 /* Reserved */
#define ENOSR 98 /* No STREAM resources */
#define ENOSTR 99 /* Not a STREAM */
#define EPROTO 100 /* Protocol error */
#define ETIME 101 /* STREAM ioctl timeout */
#if __DARWIN_UNIX03 || defined(KERNEL)
/* This value is only discrete when compiling __DARWIN_UNIX03, or KERNEL */
#define EOPNOTSUPP 102 /* Operation not supported on socket */
#endif /* __DARWIN_UNIX03 || KERNEL */
#define ENOPOLICY 103 /* No such policy registered */
#if __DARWIN_C_LEVEL >= 200809L
#define ENOTRECOVERABLE 104 /* State not recoverable */
#define EOWNERDEAD 105 /* Previous owner died */
#endif
#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
#define EQFULL 106 /* Interface output queue is full */
#define ELAST 106 /* Must be equal largest errno */
#endif
#endif /* _SYS_ERRNO_H_ */
好吧，我就想試試排版效果。。。。。。
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