diff options
Diffstat (limited to 'StdLib/Include/sys/file.h')
| -rw-r--r-- | StdLib/Include/sys/file.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/StdLib/Include/sys/file.h b/StdLib/Include/sys/file.h new file mode 100644 index 0000000000..cce35f1637 --- /dev/null +++ b/StdLib/Include/sys/file.h @@ -0,0 +1,102 @@ +/*
+ * Copyright (c) 1982, 1986, 1989, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * 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.
+ *
+ * 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 8.3 (Berkeley) 1/9/95
+ * $Id: file.h,v 1.1.1.1 2006/05/30 06:12:53 hhzhou Exp $
+ */
+
+#ifndef _SYS_FILE_H_
+#define _SYS_FILE_H_
+
+#ifndef KERNEL
+#include <sys/fcntl.h>
+#include <sys/unistd.h>
+#endif
+
+#ifdef KERNEL
+#include <sys/queue.h>
+
+struct proc;
+struct uio;
+
+/*
+ * Kernel descriptor table.
+ * One entry for each open kernel vnode and socket.
+ */
+struct file {
+ LIST_ENTRY(file) f_list;/* list of active files */
+ short f_flag; /* see fcntl.h */
+#define DTYPE_VNODE 1 /* file */
+#define DTYPE_SOCKET 2 /* communications endpoint */
+#define DTYPE_PIPE 3 /* pipe */
+#define DTYPE_FIFO 4 /* fifo (named pipe) */
+ short f_type; /* descriptor type */
+ short f_count; /* reference count */
+ 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 flags));
+ int (*fo_write) __P((struct file *fp, struct uio *uio,
+ struct ucred *cred, int flags));
+#define FOF_OFFSET 1
+ int (*fo_ioctl) __P((struct file *fp, u_long com,
+ caddr_t data, struct proc *p));
+ int (*fo_poll) __P((struct file *fp, int events,
+ struct ucred *cred, struct proc *p));
+ int (*fo_close) __P((struct file *fp, struct proc *p));
+ } *f_ops;
+ int f_seqcount; /*
+ * count of sequential accesses -- cleared
+ * by most seek operations.
+ */
+ off_t f_nextread; /*
+ * offset of next expected read
+ */
+ off_t f_offset;
+ caddr_t f_data; /* vnode or socket */
+};
+
+#ifdef MALLOC_DECLARE
+MALLOC_DECLARE(M_FILE);
+#endif
+
+LIST_HEAD(filelist, file);
+extern struct filelist filehead; /* head of list of open files */
+extern struct fileops vnops;
+extern int maxfiles; /* kernel limit on number of open files */
+extern int maxfilesperproc; /* per process limit on number of open files */
+extern int nfiles; /* actual number of open files */
+
+#endif /* KERNEL */
+
+#endif /* !SYS_FILE_H */
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