1 /* $NetBSD: file.h,v 1.7 2021/12/19 10:39:06 riastradh Exp $ */ 2 3 /*- 4 * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Taylor R. Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _LINUX_FILE_H_ 33 #define _LINUX_FILE_H_ 34 35 #include <sys/param.h> 36 #include <sys/file.h> 37 #include <sys/filedesc.h> 38 #include <sys/proc.h> 39 40 struct file; 41 42 struct fd { 43 struct file *file; 44 int fd_number; 45 }; 46 47 static inline struct fd 48 fdget(int number) 49 { 50 struct fd fd; 51 52 fd.file = fd_getfile(number); 53 fd.fd_number = number; 54 55 return fd; 56 } 57 58 static inline void 59 fdput(struct fd fd) 60 { 61 62 fd_putfile(fd.fd_number); 63 } 64 65 /* fget translates; fput(fp) doesn't because we have fd_putfile(fd). */ 66 static inline struct file * 67 fget(int fd) 68 { 69 return fd_getfile(fd); 70 } 71 72 static inline void 73 fd_install(int fd, struct file *fp) 74 { 75 fd_affix(curproc, fp, fd); 76 } 77 78 #endif /* _LINUX_FILE_H_ */ 79