97 lines
4.8 KiB
C
97 lines
4.8 KiB
C
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/* The <errno.h> header defines the numbers of the various errors that can
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* occur during program execution. They are visible to user programs and
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* should be small positive integers. However, they are also used within
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* MINIX, where they must be negative. For example, the READ system call is
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* executed internally by calling do_read(). This function returns either a
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* (negative) error number or a (positive) number of bytes actually read.
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*
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* To solve the problem of having the error numbers be negative inside the
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* the system and positive outside, the following mechanism is used. All the
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* definitions are are the form:
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*
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* #define EPERM (_SIGN 1)
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*
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* If the macro _SYSTEM is defined, then _SIGN is set to "-", otherwise it is
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* set to "". Thus when compiling the operating system, the macro _SYSTEM
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* will be defined, setting EPERM to (- 1), whereas when when this
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* file is included in an ordinary user program, EPERM has the value ( 1).
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*/
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#ifndef _ERRNO_H /* check if <errno.h> is already included */
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#define _ERRNO_H /* it is not included; note that fact */
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/* Now define _SIGN as "" or "-" depending on _SYSTEM. */
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#ifdef _SYSTEM
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# define _SIGN -
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# define OK 0
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#else
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# define _SIGN
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#endif
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extern int errno; /* place where the error numbers go */
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/* Here are the numerical values of the error numbers. */
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#define _NERROR 39 /* number of errors */
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#define ERROR (_SIGN 99) /* generic error */
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#define EPERM (_SIGN 1) /* operation not permitted */
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#define ENOENT (_SIGN 2) /* no such file or directory */
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#define ESRCH (_SIGN 3) /* no such process */
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#define EINTR (_SIGN 4) /* interrupted function call */
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#define EIO (_SIGN 5) /* input/output error */
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#define ENXIO (_SIGN 6) /* no such device or address */
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#define E2BIG (_SIGN 7) /* arg list too long */
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#define ENOEXEC (_SIGN 8) /* exec format error */
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#define EBADF (_SIGN 9) /* bad file descriptor */
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#define ECHILD (_SIGN 10) /* no child process */
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#define EAGAIN (_SIGN 11) /* resource temporarily unavailable */
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#define ENOMEM (_SIGN 12) /* not enough space */
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#define EACCES (_SIGN 13) /* permission denied */
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#define EFAULT (_SIGN 14) /* bad address */
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#define ENOTBLK (_SIGN 15) /* Extension: not a block special file */
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#define EBUSY (_SIGN 16) /* resource busy */
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#define EEXIST (_SIGN 17) /* file exists */
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#define EXDEV (_SIGN 18) /* improper link */
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#define ENODEV (_SIGN 19) /* no such device */
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#define ENOTDIR (_SIGN 20) /* not a directory */
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#define EISDIR (_SIGN 21) /* is a directory */
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#define EINVAL (_SIGN 22) /* invalid argument */
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#define ENFILE (_SIGN 23) /* too many open files in system */
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#define EMFILE (_SIGN 24) /* too many open files */
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#define ENOTTY (_SIGN 25) /* inappropriate I/O control operation */
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#define ETXTBSY (_SIGN 26) /* no longer used */
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#define EFBIG (_SIGN 27) /* file too large */
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#define ENOSPC (_SIGN 28) /* no space left on device */
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#define ESPIPE (_SIGN 29) /* invalid seek */
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#define EROFS (_SIGN 30) /* read-only file system */
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#define EMLINK (_SIGN 31) /* too many links */
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#define EPIPE (_SIGN 32) /* broken pipe */
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#define EDOM (_SIGN 33) /* domain error (from ANSI C std) */
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#define ERANGE (_SIGN 34) /* result too large (from ANSI C std) */
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#define EDEADLK (_SIGN 35) /* resource deadlock avoided */
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#define ENAMETOOLONG (_SIGN 36) /* file name too long */
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#define ENOLCK (_SIGN 37) /* no locks available */
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#define ENOSYS (_SIGN 38) /* function not implemented */
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#define ENOTEMPTY (_SIGN 39) /* directory not empty */
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/* The following are not POSIX errors, but they can still happen. */
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#define ELOCKED (_SIGN 101) /* can't send message */
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#define EBADCALL (_SIGN 102) /* error on send/receive */
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/* The following error codes are generated by the kernel itself. */
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#ifdef _SYSTEM
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#define E_BAD_DEST -1 /* destination address illegal */
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#define E_BAD_SRC -2 /* source address illegal */
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#define E_TRY_AGAIN -3 /* can't send-- tables full */
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#define E_OVERRUN -4 /* interrupt for task that is not waiting */
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#define E_BAD_BUF -5 /* message buf outside caller's addr space */
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#define E_TASK -6 /* can't send to task */
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#define E_NO_MESSAGE -7 /* RECEIVE failed: no message present */
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#define E_NO_PERM -8 /* ordinary users can't send to tasks */
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#define E_BAD_FCN -9 /* only valid fcns are SEND, RECEIVE, BOTH */
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#define E_BAD_ADDR -10 /* bad address given to utility routine */
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#define E_BAD_PROC -11 /* bad proc number given to utility */
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#endif /* _SYSTEM */
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#endif /* _ERRNO_H */
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