BSD 4_3_Net_2 release

[unix-history] / usr / src / sys / sys / file.h

diff --git a/usr/src/sys/sys/file.h b/usr/src/sys/sys/file.h
index 72febe3..31f1989 100644 (file)
--- a/usr/src/sys/sys/file.h
+++ b/usr/src/sys/sys/file.h
@@ -2,9 +2,35 @@
  * Copyright (c) 1982, 1986, 1989 Regents of the University of California.
  * All rights reserved.
  *
  * Copyright (c) 1982, 1986, 1989 Regents of the University of California.
  * All rights reserved.
  *

- * %sccs.include.redist.c%
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *     This product includes software developed by the University of
+ *     California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.

  *
  *

- *     @(#)file.h      7.8 (Berkeley) %G%
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *     @(#)file.h      7.10 (Berkeley) 6/4/91

  */
 
 #include <sys/fcntl.h>
  */
 
 #include <sys/fcntl.h>


@@ -12,11 +38,13 @@
 
 #ifdef KERNEL
 /*
 
 #ifdef KERNEL
 /*

- * Kernel descriptor table entry;
- * one for each open kernel vnode and socket.
+ * Kernel descriptor table.
+ * One entry for each open kernel vnode and socket.

  */
 struct file {
  */
 struct file {

-       int     f_flag;         /* see below */
+       struct  file *f_filef;  /* list of active files */
+       struct  file **f_fileb; /* list of active files */
+       short   f_flag;         /* see fcntl.h */

 #define        DTYPE_VNODE     1       /* file */
 #define        DTYPE_SOCKET    2       /* communications endpoint */
        short   f_type;         /* descriptor type */
 #define        DTYPE_VNODE     1       /* file */
 #define        DTYPE_SOCKET    2       /* communications endpoint */
        short   f_type;         /* descriptor type */


@@ -24,32 +52,22 @@ struct file {
        short   f_msgcount;     /* references from message queue */
        struct  ucred *f_cred;  /* credentials associated with descriptor */
        struct  fileops {
        short   f_msgcount;     /* references from message queue */
        struct  ucred *f_cred;  /* credentials associated with descriptor */
        struct  fileops {

-               int     (*fo_read)__P((
-                               struct file *fp,
-                               struct uio *uio,
-                               struct ucred *cred));
-               int     (*fo_write)__P((
-                               struct file *fp,
-                               struct uio *uio,
-                               struct ucred *cred));
-               int     (*fo_ioctl)__P((
-                               struct file *fp,
-                               int com,
-                               caddr_t data,
-                               struct proc *p));
-               int     (*fo_select)__P((
-                               struct file *fp,
-                               int which,
-                               struct proc *p));
-               int     (*fo_close)__P((
-                               struct file *fp,
-                               struct proc *p));
+               int     (*fo_read)      __P((struct file *fp, struct uio *uio,
+                                           struct ucred *cred));
+               int     (*fo_write)     __P((struct file *fp, struct uio *uio,
+                                           struct ucred *cred));
+               int     (*fo_ioctl)     __P((struct file *fp, int com,
+                                           caddr_t data, struct proc *p));
+               int     (*fo_select)    __P((struct file *fp, int which,
+                                           struct proc *p));
+               int     (*fo_close)     __P((struct file *fp, struct proc *p));

        } *f_ops;
        } *f_ops;

-       caddr_t f_data;         /* inode */

        off_t   f_offset;
        off_t   f_offset;

+       caddr_t f_data;         /* vnode or socket */

 };
 
 };
 

-struct file *file, *fileNFILE;
-int nfile;
+extern struct file *filehead;  /* head of list of open files */
+extern int maxfiles;           /* kernel limit on number of open files */
+extern int nfiles;             /* actual number of open files */

 
 #endif /* KERNEL */
 
 #endif /* KERNEL */