The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/lib/libsa/close.c

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    1 /*      $NetBSD: close.c,v 1.10 2003/08/07 16:32:26 agc Exp $   */
    2 
    3 /*-
    4  * Copyright (c) 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * This code is derived from software contributed to Berkeley by
    8  * The Mach Operating System project at Carnegie-Mellon University.
    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  * 3. Neither the name of the University nor the names of its contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   32  * SUCH DAMAGE.
   33  *
   34  *      @(#)close.c     8.1 (Berkeley) 6/11/93
   35  *  
   36  *
   37  * Copyright (c) 1989, 1990, 1991 Carnegie Mellon University
   38  * All Rights Reserved.
   39  *
   40  * Author: Alessandro Forin
   41  * 
   42  * Permission to use, copy, modify and distribute this software and its
   43  * documentation is hereby granted, provided that both the copyright
   44  * notice and this permission notice appear in all copies of the
   45  * software, derivative works or modified versions, and any portions
   46  * thereof, and that both notices appear in supporting documentation.
   47  * 
   48  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
   49  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
   50  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
   51  * 
   52  * Carnegie Mellon requests users of this software to return to
   53  * 
   54  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
   55  *  School of Computer Science
   56  *  Carnegie Mellon University
   57  *  Pittsburgh PA 15213-3890
   58  * 
   59  * any improvements or extensions that they make and grant Carnegie the
   60  * rights to redistribute these changes.
   61  */
   62 
   63 #include "stand.h"
   64 
   65 int
   66 #ifndef __INTERNAL_LIBSA_CREAD
   67 close(fd)
   68 #else
   69 oclose(fd)
   70 #endif
   71         int fd;
   72 {
   73         struct open_file *f = &files[fd];
   74         int err1 = 0, err2 = 0;
   75 
   76 #if !defined(LIBSA_NO_FD_CHECKING)
   77         if ((unsigned)fd >= SOPEN_MAX || f->f_flags == 0) {
   78                 errno = EBADF;
   79                 return (-1);
   80         }
   81 #endif
   82 #if !defined(LIBSA_NO_RAW_ACCESS)
   83         if (!(f->f_flags & F_RAW))
   84 #endif
   85 #if !defined(LIBSA_SINGLE_FILESYSTEM)
   86                 if (f->f_ops != NULL)
   87 #endif
   88                         err1 = FS_CLOSE(f->f_ops)(f);
   89         if (!(f->f_flags & F_NODEV))
   90 #if !defined(LIBSA_SINGLE_DEVICE)
   91                 if (f->f_dev != NULL)
   92 #endif
   93                         err2 = DEV_CLOSE(f->f_dev)(f);
   94         f->f_flags = 0;
   95         if (err1) {
   96                 errno = err1;
   97                 return (-1);
   98         }
   99         if (err2) {
  100                 errno = err2;
  101                 return (-1);
  102         }
  103         return (0);
  104 }

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