X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/8c8a5b54e79564c14fc7a2823a21a8f048449bcf..af359dea2e5ab3e937b62107ecd6a51d78189ed7:/usr/src/sys/sys/file.h

diff --git a/usr/src/sys/sys/file.h b/usr/src/sys/sys/file.h
index 72febe3822..31f198937e 100644
--- 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.
  *
- * %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>
@@ -12,11 +38,13 @@
 
 #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 {
-	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 */
@@ -24,32 +52,22 @@ struct file {
 	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;
-	caddr_t	f_data;		/* inode */
 	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 */