FreeBSD/Linux Kernel Cross Reference
sys/emulation/43bsd/43bsd_stats.c

     /*
      * 43BSD_STATS.C        - 4.3BSD compatibility stats syscalls
      *
      * Copyright (c) 1982, 1986, 1989, 1991, 1993
      *      The Regents of the University of California.  All rights reserved.
      * (c) UNIX System Laboratories, Inc.
      * All or some portions of this file are derived from material licensed
      * to the University of California by American Telephone and Telegraph
      * Co. or Unix System Laboratories, Inc. and are reproduced herein with
     * the permission of UNIX System Laboratories, Inc.
     *
     * 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. 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.
     *
     * $DragonFly: src/sys/emulation/43bsd/43bsd_stats.c,v 1.5 2006/06/05 07:26:07 dillon Exp $
     *      from: DragonFly kern/kern_descrip.c,v 1.16
     *      from: DragonFly kern/vfs_syscalls.c,v 1.21
     *
     * These syscalls used to live in kern/kern_descrip.c and
     * kern/vfs_syscalls.c.  They are modified * to use the new split syscalls.
     */
    
    #include "opt_compat.h"
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/sysproto.h>
    #include <sys/conf.h>
    #include <sys/kernel.h>
    #include <sys/stat.h>
    #include <sys/kern_syscall.h>
    #include <sys/namei.h>
    #include <sys/nlookup.h>
    
    #include <sys/mplock2.h>
    
    #include <emulation/43bsd/stat.h>
    
    static int
    compat_43_copyout_stat(struct stat *st, struct ostat *uaddr)
    {
            struct ostat ost;
            int error;
    
            ost.st_dev = st->st_dev;
            ost.st_ino = st->st_ino;
            ost.st_mode = st->st_mode;
            ost.st_nlink = st->st_nlink;
            ost.st_uid = st->st_uid;
            ost.st_gid = st->st_gid;
            ost.st_rdev = st->st_rdev;
            if (st->st_size < (quad_t)1 << 32)
                    ost.st_size = st->st_size;
            else
                    ost.st_size = -2;
            ost.st_atime = st->st_atime;
            ost.st_mtime = st->st_mtime;
            ost.st_ctime = st->st_ctime;
            ost.st_blksize = st->st_blksize;
            ost.st_blocks = st->st_blocks;
            ost.st_flags = st->st_flags;
            ost.st_gen = st->st_gen;
    
            error = copyout(&ost, uaddr, sizeof(ost));
            return (error);
    }
    
    /*
     * MPALMOSTSAFE
     */
    int
    sys_ofstat(struct ofstat_args *uap)
    {
            struct stat st;
            int error;
    
            error = kern_fstat(uap->fd, &st);
    
           if (error == 0)
                   error = compat_43_copyout_stat(&st, uap->sb);
           return (error);
   }
   
   /*
    * MPALMOSTSAFE
    */
   int
   sys_ostat(struct ostat_args *uap)
   {
           struct nlookupdata nd;
           struct stat st;
           int error;
   
           get_mplock();
           error = nlookup_init(&nd, uap->path, UIO_USERSPACE, NLC_FOLLOW);
           if (error == 0) {
                   error = kern_stat(&nd, &st);
                   if (error == 0)
                           error = compat_43_copyout_stat(&st, uap->ub);
                   nlookup_done(&nd);
           }
           rel_mplock();
           return (error);
   }
   
   /*
    * MPALMOSTSAFE
    */
   int
   sys_olstat(struct olstat_args *uap)
   {
           struct nlookupdata nd;
           struct stat st;
           int error;
   
           get_mplock();
           error = nlookup_init(&nd, uap->path, UIO_USERSPACE, 0);
           if (error == 0) {
                   error = kern_stat(&nd, &st);
                   if (error == 0)
                           error = compat_43_copyout_stat(&st, uap->ub);
                   nlookup_done(&nd);
           }
           rel_mplock();
           return (error);
   }

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