kernel/syscall/fdsync.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 /*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T     */
  27 /*        All Rights Reserved   */
  28
  29 /*
  30  * Portions of this source code were derived from Berkeley 4.3 BSD
  31  * under license from the Regents of the University of California.
  32  */
  33
  34 #pragma ident   "%Z%%M% %I%     %E% SMI"
  35
  36 #include <sys/param.h>
  37 #include <sys/isa_defs.h>
  38 #include <sys/types.h>
  39 #include <sys/sysmacros.h>
  40 #include <sys/cred.h>
  41 #include <sys/systm.h>
  42 #include <sys/errno.h>
  43 #include <sys/vnode.h>
  44 #include <sys/file.h>
  45 #include <sys/mode.h>
  46 #include <sys/debug.h>
  47
  48 /*
  49  * Flush output pending for file.
  50  */
  51 int
  52 fdsync(int fd, int flag)
  53 {
  54         file_t *fp;
  55         register int error;
  56         int syncflag;
  57
  58         if ((fp = getf(fd)) != NULL) {
  59                 /*
  60                  * This flag will determine the file sync
  61                  * or data sync.
  62                  * FSYNC : file sync
  63                  * FDSYNC : data sync
  64                  */
  65                 syncflag = flag & (FSYNC|FDSYNC);
  66
  67                 if (error = fop_fsync(fp->f_vnode, syncflag, fp->f_cred, NULL))
  68                         (void) set_errno(error);
  69                 releasef(fd);
  70         } else
  71                 error = set_errno(EBADF);
  72         return (error);
  73 }