include/errno.h

   1 /* The <errno.h> header defines the numbers of the various errors that can
   2  * occur during program execution.  They are visible to user programs and
   3  * should be small positive integers.  However, they are also used within
   4  * MINIX, where they must be negative.  For example, the READ system call is
   5  * executed internally by calling do_read().  This function returns either a
   6  * (negative) error number or a (positive) number of bytes actually read.
   7  *
   8  * To solve the problem of having the error numbers be negative inside the
   9  * the system and positive outside, the following mechanism is used.  All the
  10  * definitions are are the form:
  11  *
  12  *      #define EPERM           (_SIGN 1)
  13  *
  14  * If the macro _SYSTEM is defined, then  _SIGN is set to "-", otherwise it is
  15  * set to "".  Thus when compiling the operating system, the  macro _SYSTEM
  16  * will be defined, setting EPERM to (- 1), whereas when when this
  17  * file is included in an ordinary user program, EPERM has the value ( 1).
  18  */
  19
  20 #ifndef _ERRNO_H                /* check if <errno.h> is already included */
  21 #define _ERRNO_H                /* it is not included; note that fact */
  22
  23 /* Now define _SIGN as "" or "-" depending on _SYSTEM. */
  24 #ifdef _SYSTEM
  25 #   define _SIGN         -
  26 #   define OK            0
  27 #else
  28 #   define _SIGN
  29 #endif
  30
  31 extern int errno;                 /* place where the error numbers go */
  32
  33 /* Here are the numerical values of the error numbers. */
  34 #define _NERROR               70  /* number of errors */
  35
  36 #define EGENERIC      (_SIGN 99)  /* generic error */
  37 #define EPERM         (_SIGN  1)  /* operation not permitted */
  38 #define ENOENT        (_SIGN  2)  /* no such file or directory */
  39 #define ESRCH         (_SIGN  3)  /* no such process */
  40 #define EINTR         (_SIGN  4)  /* interrupted function call */
  41 #define EIO           (_SIGN  5)  /* input/output error */
  42 #define ENXIO         (_SIGN  6)  /* no such device or address */
  43 #define E2BIG         (_SIGN  7)  /* arg list too long */
  44 #define ENOEXEC       (_SIGN  8)  /* exec format error */
  45 #define EBADF         (_SIGN  9)  /* bad file descriptor */
  46 #define ECHILD        (_SIGN 10)  /* no child process */
  47 #define EAGAIN        (_SIGN 11)  /* resource temporarily unavailable */
  48 #define ENOMEM        (_SIGN 12)  /* not enough space */
  49 #define EACCES        (_SIGN 13)  /* permission denied */
  50 #define EFAULT        (_SIGN 14)  /* bad address */
  51 #define ENOTBLK       (_SIGN 15)  /* Extension: not a block special file */
  52 #define EBUSY         (_SIGN 16)  /* resource busy */
  53 #define EEXIST        (_SIGN 17)  /* file exists */
  54 #define EXDEV         (_SIGN 18)  /* improper link */
  55 #define ENODEV        (_SIGN 19)  /* no such device */
  56 #define ENOTDIR       (_SIGN 20)  /* not a directory */
  57 #define EISDIR        (_SIGN 21)  /* is a directory */
  58 #define EINVAL        (_SIGN 22)  /* invalid argument */
  59 #define ENFILE        (_SIGN 23)  /* too many open files in system */
  60 #define EMFILE        (_SIGN 24)  /* too many open files */
  61 #define ENOTTY        (_SIGN 25)  /* inappropriate I/O control operation */
  62 #define ETXTBSY       (_SIGN 26)  /* no longer used */
  63 #define EFBIG         (_SIGN 27)  /* file too large */
  64 #define ENOSPC        (_SIGN 28)  /* no space left on device */
  65 #define ESPIPE        (_SIGN 29)  /* invalid seek */
  66 #define EROFS         (_SIGN 30)  /* read-only file system */
  67 #define EMLINK        (_SIGN 31)  /* too many links */
  68 #define EPIPE         (_SIGN 32)  /* broken pipe */
  69 #define EDOM          (_SIGN 33)  /* domain error       (from ANSI C std) */
  70 #define ERANGE        (_SIGN 34)  /* result too large   (from ANSI C std) */
  71 #define EDEADLK       (_SIGN 35)  /* resource deadlock avoided */
  72 #define ENAMETOOLONG  (_SIGN 36)  /* file name too long */
  73 #define ENOLCK        (_SIGN 37)  /* no locks available */
  74 #define ENOSYS        (_SIGN 38)  /* function not implemented */
  75 #define ENOTEMPTY     (_SIGN 39)  /* directory not empty */
  76 #define ELOOP         (_SIGN 40)  /* too many levels of symlinks detected */
  77
  78 /* The following errors relate to networking. */
  79 #define EPACKSIZE     (_SIGN 50)  /* invalid packet size for some protocol */
  80 #define EOUTOFBUFS    (_SIGN 51)  /* not enough buffers left */
  81 #define EBADIOCTL     (_SIGN 52)  /* illegal ioctl for device */
  82 #define EBADMODE      (_SIGN 53)  /* badmode in ioctl */
  83 #define EWOULDBLOCK   (_SIGN 54)
  84 #define EBADDEST      (_SIGN 55)  /* not a valid destination address */
  85 #define EDSTNOTRCH    (_SIGN 56)  /* destination not reachable */
  86 #define EISCONN       (_SIGN 57)  /* all ready connected */
  87 #define EADDRINUSE    (_SIGN 58)  /* address in use */
  88 #define ECONNREFUSED  (_SIGN 59)  /* connection refused */
  89 #define ECONNRESET    (_SIGN 60)  /* connection reset */
  90 #define ETIMEDOUT     (_SIGN 61)  /* connection timed out */
  91 #define EURG          (_SIGN 62)  /* urgent data present */
  92 #define ENOURG        (_SIGN 63)  /* no urgent data present */
  93 #define ENOTCONN      (_SIGN 64)  /* no connection (yet or anymore) */
  94 #define ESHUTDOWN     (_SIGN 65)  /* a write call to a shutdown connection */
  95 #define ENOCONN       (_SIGN 66)  /* no such connection */
  96 #define EAFNOSUPPORT  (_SIGN 67)  /* address family not supported */
  97 #define EPROTONOSUPPORT (_SIGN 68) /* protocol not supported by AF */
  98 #define EPROTOTYPE    (_SIGN 69)  /* Protocol wrong type for socket */
  99 #define EINPROGRESS   (_SIGN 70)  /* Operation now in progress */
 100 #define EADDRNOTAVAIL (_SIGN 71)  /* Can't assign requested address */
 101 #define EALREADY      (_SIGN 72)  /* Connection already in progress */
 102 #define EMSGSIZE      (_SIGN 73)  /* Message too long */
 103 #define ENOTSOCK      (_SIGN 74)  /* Socket operation on non-socket */
 104 #define ENOPROTOOPT   (_SIGN 75)  /* Protocol not available */
 105 #define EOPNOTSUPP    (_SIGN 76)  /* Operation not supported */
 106
 107 /* The following are not POSIX errors, but they can still happen.
 108  * All of these are generated by the kernel and relate to message passing.
 109  */
 110 #define ELOCKED      (_SIGN 101)  /* can't send message due to deadlock */
 111 #define EBADCALL     (_SIGN 102)  /* illegal system call number */
 112 #define EBADSRCDST   (_SIGN 103)  /* bad source or destination process */
 113 #define ECALLDENIED  (_SIGN 104)  /* no permission for system call */
 114 #define EDEADSRCDST  (_SIGN 105)  /* source or destination is not alive */
 115 #define ENOTREADY    (_SIGN 106)  /* source or destination is not ready */
 116 #define EBADREQUEST  (_SIGN 107)  /* destination cannot handle request */
 117 #define ESRCDIED     (_SIGN 108)  /* source just died */
 118 #define EDSTDIED     (_SIGN 109)  /* destination just died */
 119 #define ETRAPDENIED  (_SIGN 110)  /* IPC trap not allowed */
 120 #define EDONTREPLY   (_SIGN 201)  /* pseudo-code: don't send a reply */
 121
 122 #endif /* _ERRNO_H */