Added errno.h

diff --git a/lib/minix/include/sys/.distr b/lib/minix/include/sys/.distr
index 697204f..2781e77 100644 (file)
--- a/lib/minix/include/sys/.distr
+++ b/lib/minix/include/sys/.distr
@@ -2,3 +2,4 @@ times.h
 wait.h
 types.h
 stat.h
+errno.h

diff --git a/lib/minix/include/sys/errno.h b/lib/minix/include/sys/errno.h
new file mode 100644 (file)
index 0000000..9092ffb
--- /dev/null
+++ b/lib/minix/include/sys/errno.h
@@ -0,0 +1,96 @@
+/* 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 */