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sysiocod errors are system specific, and are reported directly from the operating system. For WIndows you can use the built-in helpmsg system to obtain the meaning of these errors:
>net helpmsg <msg_no>
From Unix, you need to reference the errno.h header file. Here is a typical file (from AIX) provided as a handy reference.
#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 descriptor */
#define ECHILD 10 /* No child processes */
#define EAGAIN 11 /* Resource temporarily unavailable */
#define ENOMEM 12 /* Not enough space */
#define EACCES 13 /* Permission denied */
#define EFAULT 14 /* Bad address */
#define ENOTBLK 15 /* Block device required */
#define EBUSY 16 /* Resource busy */
#define EEXIST 17 /* File exists */
#define EXDEV 18 /* Improper 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 /* Too many open files in system */
#define EMFILE 24 /* Too many open files */
#define ENOTTY 25 /* Inappropriate I/O control operation */
#define ETXTBSY 26 /* Text file busy */
#define EFBIG 27 /* File too large */
#define ENOSPC 28 /* No space left on device */
#define ESPIPE 29 /* Invalid seek */
#define EROFS 30 /* Read only file system */
#define EMLINK 31 /* Too many links */
#define EPIPE 32 /* Broken pipe */
#define EDOM 33 /* Domain error within math function */
#define ERANGE 34 /* Result too large */
#define ENOMSG 35 /* No message of desired type */
#define EIDRM 36 /* Identifier removed */
#define ECHRNG 37 /* Channel number out of range */
#define EL2NSYNC 38 /* Level 2 not synchronized */
#define EL3HLT 39 /* Level 3 halted */
#define EL3RST 40 /* Level 3 reset */
#define ELNRNG 41 /* Link number out of range */
#define EUNATCH 42 /* Protocol driver not attached */
#define ENOCSI 43 /* No CSI structure available */
#define EL2HLT 44 /* Level 2 halted */
#define EDEADLK 45 /* Resource deadlock avoided */
#define ENOTREADY 46 /* Device not ready */
#define EWRPROTECT 47 /* Write-protected media */
#define EFORMAT 48 /* Unformatted media */
#define ENOLCK 49 /* No locks available */
#define ENOCONNECT 50 /* no connection */
#define ESTALE 52 /* no filesystem */
#define EDIST 53 /* old, currently unused AIX errno*/
/* non-blocking and interrupt i/o */
/*
* AIX returns EAGAIN where 4.3BSD used EWOULDBLOCK;
* but, the standards insist on unique errno values for each errno.
* A unique value is reserved for users that want to code case
* statements for systems that return either EAGAIN or EWOULDBLOCK.
*/
#if _XOPEN_SOURCE_EXTENDED==1
#define EWOULDBLOCK EAGAIN /* Operation would block */
#else /* _XOPEN_SOURCE_EXTENDED */
#define EWOULDBLOCK 54
#endif /* _XOPEN_SOURCE_EXTENDED */
#define EINPROGRESS 55 /* Operation now in progress */
#define EALREADY 56 /* Operation already in progress */
/* ipc/network software */
/* argument errors */
#define ENOTSOCK 57 /* Socket operation on non-socket */
#define EDESTADDRREQ 58 /* Destination address required */
#define EDESTADDREQ EDESTADDRREQ /* Destination address required */
#define EMSGSIZE 59 /* Message too long */
#define EPROTOTYPE 60 /* Protocol wrong type for socket */
#define ENOPROTOOPT 61 /* Protocol not available */
#define EPROTONOSUPPORT 62 /* Protocol not supported */
#define ESOCKTNOSUPPORT 63 /* Socket type not supported */
#define EOPNOTSUPP 64 /* Operation not supported on socket */
#define EPFNOSUPPORT 65 /* Protocol family not supported */
#define EAFNOSUPPORT 66 /* Address family not supported by protocol family */
#define EADDRINUSE 67 /* Address already in use */
#define EADDRNOTAVAIL 68 /* Can't assign requested address */
/* operational errors */
#define ENETDOWN 69 /* Network is down */
#define ENETUNREACH 70 /* Network is unreachable */
#define ENETRESET 71 /* Network dropped connection on reset */
#define ECONNABORTED 72 /* Software caused connection abort */
#define ECONNRESET 73 /* Connection reset by peer */
#define ENOBUFS 74 /* No buffer space available */
#define EISCONN 75 /* Socket is already connected */
#define ENOTCONN 76 /* Socket is not connected */
#define ESHUTDOWN 77 /* Can't send after socket shutdown */
#define ETIMEDOUT 78 /* Connection timed out */
#define ECONNREFUSED 79 /* Connection refused */
#define EHOSTDOWN 80 /* Host is down */
#define EHOSTUNREACH 81 /* No route to host */
/* ERESTART is used to determine if the system call is restartable */
#define ERESTART 82 /* restart the system call */
/* quotas and limits */
#define EPROCLIM 83 /* Too many processes */
#define EUSERS 84 /* Too many users */
#define ELOOP 85 /* Too many levels of symbolic links */
#define ENAMETOOLONG 86 /* File name too long */
/*
* AIX returns EEXIST where 4.3BSD used ENOTEMPTY;
* but, the standards insist on unique errno values for each errno.
* A unique value is reserved for users that want to code case
* statements for systems that return either EEXIST or ENOTEMPTY.
*/
#if defined(_ALL_SOURCE) && !defined(_LINUX_SOURCE_COMPAT)
#define ENOTEMPTY EEXIST /* Directory not empty */
#else /* not _ALL_SOURCE */
#define ENOTEMPTY 87
#endif /* _ALL_SOURCE */
/* disk quotas */
#define EDQUOT 88 /* Disc quota exceeded */
#define ECORRUPT 89 /* Invalid file system control data */
/* errnors 90-92 reserved for future use compatible with AIX PS/2 */
/* network file system */
#define EREMOTE 93 /* Item is not local to host */
#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 ENOSYS 109 /* Function not implemented POSIX */
/* disk device driver */
#define EMEDIA 110 /* media surface error */
#define ESOFT 111 /* I/O completed, but needs relocation */
/* security */
#define ENOATTR 112 /* no attribute found */
#define ESAD 113 /* security authentication denied */
#define ENOTRUST 114 /* not a trusted program */
/* BSD 4.3 RENO */
#define ETOOMANYREFS 115 /* Too many references: can't splice */
#define EILSEQ 116 /* Invalid wide character */
#define ECANCELED 117 /* asynchronous i/o cancelled */
/* SVR4 STREAMS */
#define ENOSR 118 /* temp out of streams resources */
#define ETIME 119 /* I_STR ioctl timed out */
#define EBADMSG 120 /* wrong message type at stream head */
#define EPROTO 121 /* STREAMS protocol error */
#define ENODATA 122 /* no message ready at stream head */
#define ENOSTR 123 /* fd is not a stream */
#define ECLONEME ERESTART /* this is the way we clone a stream ... */
#define ENOTSUP 124 /* POSIX threads unsupported value */
#define EMULTIHOP 125 /* multihop is not allowed */
#define ENOLINK 126 /* the link has been severed */
#define EOVERFLOW 127 /* value too large to be stored in data type */
#endif /* _ANSI_C_SOURCE */
#endif /* _H_ERRNO */
