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