sys/lib/libsa/fstat.c

   1 /*      $NetBSD: fstat.c,v 1.7 2007/12/02 04:59:25 tsutsui Exp $        */
   2
   3 /*-
   4  * Copyright (c) 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  *
  31  *      @(#)stat.c      8.1 (Berkeley) 6/11/93
  32  */
  33
  34 #include "stand.h"
  35
  36 int
  37 fstat(int fd, struct stat *sb)
  38 {
  39         struct open_file *f = &files[fd];
  40
  41 #if !defined(LIBSA_NO_FD_CHECKING)
  42         if ((unsigned int)fd >= SOPEN_MAX || f->f_flags == 0) {
  43                 errno = EBADF;
  44                 return -1;
  45         }
  46 #endif
  47
  48 #if !defined(LIBSA_NO_RAW_ACCESS)
  49         /* operation not defined on raw devices */
  50         if (f->f_flags & F_RAW) {
  51                 errno = EOPNOTSUPP;
  52                 return -1;
  53         }
  54 #endif
  55
  56         errno = FS_STAT(f->f_ops)(f, sb);       /* XXX no point setting errno */
  57         return 0;
  58 }