/* * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */ /* * 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 */ #ifndef _SYS_FILE_H_ #define _SYS_FILE_H_ #include <sys/appleapiopts.h> #include <sys/fcntl.h> #include <sys/unistd.h> #ifdef KERNEL #include <sys/errno.h> #include <sys/queue.h> #include <sys/cdefs.h> struct proc; struct uio; struct knote; #ifdef __APPLE_API_UNSTABLE /* * 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_PSXSHM 3 /* POSIX Shared memory */ #define DTYPE_PSXSEM 4 /* POSIX Semaphores */ #define DTYPE_KQUEUE 5 /* kqueue */ 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, struct proc *p)); int (*fo_write) __P((struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct proc *p)); #define FOF_OFFSET 1 int (*fo_ioctl) __P((struct file *fp, u_long com, caddr_t data, struct proc *p)); int (*fo_select) __P((struct file *fp, int which, void *wql, struct proc *p)); int (*fo_close) __P((struct file *fp, struct proc *p)); int (*fo_kqfilter) __P((struct file *fp, struct knote *kn, struct proc *p)); } *f_ops; off_t f_offset; caddr_t f_data; /* vnode or socket or SHM or semaphore */ }; #ifdef __APPLE_API_PRIVATE LIST_HEAD(filelist, file); extern struct filelist 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 /* __APPLE_API_PRIVATE */ __BEGIN_DECLS int fref __P((struct file *)); /* take a reference on file pointer */ int frele __P((struct file *)); /* release a reference on file pointer */ int fcount __P((struct file *)); /* returns the reference count */ static __inline int fo_read __P((struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct proc *p)); static __inline int fo_write __P((struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct proc *p)); static __inline int fo_ioctl __P((struct file *fp, u_long com, caddr_t data, struct proc *p)); static __inline int fo_select __P((struct file *fp, int which, void *wql, struct proc *p)); static __inline int fo_close __P((struct file *fp, struct proc *p)); static __inline int fo_kqfilter __P((struct file *fp, struct knote *kn, struct proc *p)); static __inline int fo_read(struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct proc *p) { int error; if ((error = fref(fp)) == -1) return (EBADF); error = (*fp->f_ops->fo_read)(fp, uio, cred, flags, p); frele(fp); return (error); } static __inline int fo_write(struct file *fp, struct uio *uio, struct ucred *cred, int flags, struct proc *p) { int error; if ((error = fref(fp)) == -1) return (EBADF); error = (*fp->f_ops->fo_write)(fp, uio, cred, flags, p); frele(fp); return (error); } static __inline int fo_ioctl(struct file *fp, u_long com, caddr_t data, struct proc *p) { int error; if ((error = fref(fp)) == -1) return (EBADF); error = (*fp->f_ops->fo_ioctl)(fp, com, data, p); frele(fp); return (error); } static __inline int fo_select(struct file *fp, int which, void *wql, struct proc *p) { int error; error = (*fp->f_ops->fo_select)(fp, which, wql, p); return (error); } static __inline int fo_close(struct file *fp, struct proc *p) { return ((*fp->f_ops->fo_close)(fp, p)); } static __inline int fo_kqfilter(struct file *fp, struct knote *kn, struct proc *p) { return ((*fp->f_ops->fo_kqfilter)(fp, kn, p)); } __END_DECLS #endif /* __APPLE_API_UNSTABLE */ #endif /* KERNEL */ #endif /* !_SYS_FILE_H_ */