text: #ifndef ERRON_H
  #define ERRON_H
  
  
  #define E2BIG 1
  //    Argument list too long.
  #define EACCES 2
  //    Permission denied.
  #define EADDRINUSE 3
  //    Address in use.
  #define EADDRNOTAVAIL 4
  //    Address not available.
  #define EAFNOSUPPORT 4
  //   Address family not supported.
  #define EAGAIN 6
  //   Resource unavailable, try again (may be the same value as EWOULDBLOCK).
  #define EALREADY 7
  //   Connection already in progress.
  #define EBADF 8
  //   Bad file descriptor.
  #define EBADMSG 9
  //   Bad message.
  #define EBUSY 10
  //   Device or resource busy.
  #define ECANCELED 11
  //   Operation canceled.
  #define ECHILD 12
  //   No child processes.
  #define ECONNABORTED 13
  //   Connection aborted.
  #define ECONNREFUSED 14
  //   Connection refused.
  #define ECONNRESET 15
  //   Connection reset.
  #define EDEADLK 16
  //   Resource deadlock would occur.
  #define EDESTADDRREQ 17
  //   Destination address required.
  #define EDOM 18
  //   Mathematics argument out of domain of function.
  #define EDQUOT 19
  //   Reserved.
  #define EEXIST 20
  //   File exists.
  #define EFAULT 21
  //   Bad address.
  #define EFBIG 22
  //   File too large.
  #define EHOSTUNREACH 23
  //   Host is unreachable.
  #define EIDRM 24
  //   Identifier removed.
  #define EILSEQ 25
  //   Illegal byte sequence.
  #define EINPROGRESS 26
  //   Operation in progress.
  #define EINTR 27
  //   Interrupted function.
  #define EINVAL 28
  //   Invalid argument.
  #define EIO 29
  //   I/O error.
  #define EISCONN 30
  //   Socket is connected.
  #define EISDIR 31
  //   Is a directory.
  #define ELOOP 32
  //   Too many levels of symbolic links.
  #define EMFILE 33
  //   File descriptor value too large.
  #define EMLINK 34
  //   Too many links.
  #define EMSGSIZE 35
  //   Message too large.
  #define EMULTIHOP 36
  //   Reserved.
  #define ENAMETOOLONG 37
  //   Filename too long.
  #define ENETDOWN 38
  //   Network is down.
  #define ENETRESET 39
  //   Connection aborted by network.
  #define ENETUNREACH 40
  //   Network unreachable.
  #define ENFILE 41
  //   Too many files open in system.
  #define ENOBUFS 42
  //   No buffer space available.
  #define ENODATA 43
  //   OB XSR Option Start No message is available on the STREAM head read queue. Option End
  #define ENODEV 44
  //   No such device.
  #define ENOENT 45
  //   No such file or directory.
  #define ENOEXEC 46
  //   Executable file format error.
  #define ENOLCK 47
  //   No locks available.
  #define ENOLINK 48
  //   Reserved.
  #define ENOMEM 49
  //   Not enough space.
  #define ENOMSG 50
  //   No message of the desired type.
  #define ENOPROTOOPT 51
  //   Protocol not available.
  #define ENOSPC 52
  //   No space left on device.
  #define ENOSR 53
  //   OB XSR Option Start No STREAM resources. Option End
  #define ENOSTR 54
  //   OB XSR Option Start Not a STREAM. Option End
  #define ENOSYS 55
  //   Function not supported.
  #define ENOTCONN 56
  //   The socket is not connected.
  #define ENOTDIR 57
  //   Not a directory or a symbolic link to a directory.
  #define ENOTEMPTY 58
  //   Directory not empty.
  #define ENOTRECOVERABLE 59
  //   State not recoverable.
  #define ENOTSOCK 60
  //   Not a socket.
  #define ENOTSUP 61
  //   Not supported (may be the same value as EOPNOTSUPP).
  #define ENOTTY 62
  //   Inappropriate I/O control operation.
  #define ENXIO 63
  //   No such device or address.
  #define EOPNOTSUPP 64
  //   Operation not supported on socket (may be the same value as ENOTSUP).
  #define EOVERFLOW 65
  //   Value too large to be stored in data type.
  #define EOWNERDEAD 66
  //   Previous owner died.
  #define EPERM 67
  //   Operation not permitted.
  #define EPIPE 68
  //   Broken pipe.
  #define EPROTO 69
  //   Protocol error.
  #define EPROTONOSUPPORT 70
  //   Protocol not supported.
  #define EPROTOTYPE 71
  //   Protocol wrong type for socket.
  #define ERANGE 72
  //   Result too large.
  #define EROFS 73
  //   Read-only file system.
  #define ESPIPE 74
  //   Invalid seek.
  #define ESRCH 75
  //   No such process.
  #define ESTALE 76
  //   Reserved.
  #define ETIME 77
  //   OB XSR Option Start Stream ioctl() timeout. Option End
  #define ETIMEDOUT 78
  //   Connection timed out.
  #define ETXTBSY 79
  //   Text file busy.
  #define EWOULDBLOCK 80
  //   Operation would block (may be the same value as EAGAIN).
  #define EXDEV 81
  //   Cross-device link. 
  
  #endif
  
  