add security routines iskmemdev, isdisk, and chrtoblk

SCCS-vsn: sys/news3400/news3400/conf.c 7.5

diff --git a/usr/src/sys/news3400/news3400/conf.c b/usr/src/sys/news3400/news3400/conf.c
index ef93e85..3274184 100644 (file)
--- a/usr/src/sys/news3400/news3400/conf.c
+++ b/usr/src/sys/news3400/news3400/conf.c
@@ -7,13 +7,15 @@
  *
  * %sccs.include.redist.c%
  *
  *
  * %sccs.include.redist.c%
  *

- *     @(#)conf.c      7.4 (Berkeley) %G%
+ *     @(#)conf.c      7.5 (Berkeley) %G%

  */
 
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/buf.h>
 #include <sys/ioctl.h>
  */
 
 #include <sys/param.h>
 #include <sys/systm.h>
 #include <sys/buf.h>
 #include <sys/ioctl.h>

+#include <sys/proc.h>
+#include <sys/vnode.h>

 #include <sys/tty.h>
 #include <sys/conf.h>
 
 #include <sys/tty.h>
 #include <sys/conf.h>
 


@@ -351,3 +353,106 @@ int       mem_no = 2;     /* major device number of memory special file */
  * provided as a character (raw) device.
  */
 dev_t  swapdev = makedev(1, 0);
  * provided as a character (raw) device.
  */
 dev_t  swapdev = makedev(1, 0);

+
+/*
+ * Routine that identifies /dev/mem and /dev/kmem.
+ *
+ * A minimal stub routine can always return 0.
+ */
+iskmemdev(dev)
+       dev_t dev;
+{
+
+       if (major(dev) == 3 && (minor(dev) == 0 || minor(dev) == 1))
+               return (1);
+       return (0);
+}
+
+/*
+ * Routine to determine if a device is a disk.
+ *
+ * A minimal stub routine can always return 0.
+ */
+isdisk(dev, type)
+       dev_t dev;
+       int type;
+{
+
+       switch (major(dev)) {
+       case 0:
+       case 3:
+               if (type == VBLK)
+                       return (1);
+               return (0);
+       case 4:
+       case 15:
+               if (type == VCHR)
+                       return (1);
+               /* FALLTHROUGH */
+       default:
+               return (0);
+       }
+       /* NOTREACHED */
+}
+
+#define MAXDEV 43
+static int chrtoblktbl[MAXDEV] =  {
+      /* VCHR */      /* VBLK */
+       /* 0 */         NODEV,
+       /* 1 */         NODEV,
+       /* 2 */         NODEV,
+       /* 3 */         NODEV,
+       /* 4 */         0,
+       /* 5 */         NODEV,
+       /* 6 */         NODEV,
+       /* 7 */         NODEV,
+       /* 8 */         NODEV,
+       /* 9 */         NODEV,
+       /* 10 */        NODEV,
+       /* 11 */        NODEV,
+       /* 12 */        NODEV,
+       /* 13 */        NODEV,
+       /* 14 */        NODEV,
+       /* 15 */        3,
+       /* 16 */        NODEV,
+       /* 17 */        NODEV,
+       /* 18 */        NODEV,
+       /* 19 */        NODEV,
+       /* 20 */        NODEV,
+       /* 21 */        NODEV,
+       /* 22 */        NODEV,
+       /* 23 */        NODEV,
+       /* 24 */        NODEV,
+       /* 25 */        NODEV,
+       /* 26 */        NODEV,
+       /* 27 */        NODEV,
+       /* 28 */        NODEV,
+       /* 29 */        NODEV,
+       /* 30 */        NODEV,
+       /* 31 */        NODEV,
+       /* 32 */        NODEV,
+       /* 33 */        NODEV,
+       /* 34 */        NODEV,
+       /* 35 */        NODEV,
+       /* 36 */        NODEV,
+       /* 37 */        NODEV,
+       /* 38 */        NODEV,
+       /* 39 */        NODEV,
+       /* 40 */        NODEV,
+       /* 41 */        NODEV,
+       /* 42 */        NODEV,
+};
+/*
+ * Routine to convert from character to block device number.
+ *
+ * A minimal stub routine can always return NODEV.
+ */
+chrtoblk(dev)
+       dev_t dev;
+{
+       int blkmaj;
+
+       if (major(dev) >= MAXDEV || (blkmaj = chrtoblktbl[major(dev)]) == NODEV)
+               return (NODEV);
+       return (makedev(blkmaj, minor(dev)));
+}