xnu-2422.115.4.tar.gz

[apple/xnu.git] / bsd / miscfs / devfs / devfs.h

diff --git a/bsd/miscfs/devfs/devfs.h b/bsd/miscfs/devfs/devfs.h
index bf059f2b4df1fb0a17d9faee90ada15fcb3f8936..88e63b4f5bc9cde1908820e4e799b2f6897e26ce 100644 (file)
--- a/bsd/miscfs/devfs/devfs.h
+++ b/bsd/miscfs/devfs/devfs.h
@@ -61,8 +61,37 @@
 #define DEVFS_CHAR     0
 #define DEVFS_BLOCK    1
 
+/*
+ * Argument to clone callback after dev
+ */
+#define        DEVFS_CLONE_ALLOC       1       /* Allocate minor number slot */
+#define        DEVFS_CLONE_FREE        0       /* Free minor number slot */
+
 __BEGIN_DECLS
 
+/*
+ * Function: devfs_make_node_clone
+ *
+ * Purpose
+ *   Create a device node with the given pathname in the devfs namespace;
+ *   before returning a dev_t value for an open instance, the dev_t has
+ *   it's minor number updated by calling the supplied clone function on
+ *   the supplied dev..
+ *
+ * Parameters:
+ *   dev       - the dev_t value to associate
+ *   chrblk    - block or character device (DEVFS_CHAR or DEVFS_BLOCK)
+ *   uid, gid  - ownership
+ *   perms     - permissions
+ *   clone     - minor number cloning function
+ *   fmt, ...  - print format string and args to format the path name
+ * Returns:
+ *   A handle to a device node if successful, NULL otherwise.
+ */
+void *         devfs_make_node_clone(dev_t dev, int chrblk, uid_t uid, gid_t gid, 
+                            int perms, int (*clone)(dev_t dev, int action),
+                            const char *fmt, ...);
+
 /*
  * Function: devfs_make_node
  *
@@ -91,7 +120,7 @@ void *       devfs_make_node(dev_t dev, int chrblk, uid_t uid, gid_t gid,
  * Returns:
  *   0 if successful, -1 if failed
  */
-int    devfs_link(void * handle, char *fmt, ...);
+int    devfs_make_link(void * handle, char *fmt, ...);
 #endif /* BSD_KERNEL_PRIVATE */
 
 /*
@@ -114,6 +143,7 @@ __END_DECLS
 /* XXX */
 #define        GID_WHEEL       0
 #define        GID_KMEM        2
+#define        GID_TTY         4
 #define        GID_OPERATOR    5
 #define        GID_BIN         7
 #define        GID_GAMES       13