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/emulation/43bsd/43bsd_stats.c

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    1 /*
    2  * 43BSD_STATS.C        - 4.3BSD compatibility stats syscalls
    3  *
    4  * Copyright (c) 1982, 1986, 1989, 1991, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  * (c) UNIX System Laboratories, Inc.
    7  * All or some portions of this file are derived from material licensed
    8  * to the University of California by American Telephone and Telegraph
    9  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
   10  * the permission of UNIX System Laboratories, Inc.
   11  *
   12  * Redistribution and use in source and binary forms, with or without
   13  * modification, are permitted provided that the following conditions
   14  * are met:
   15  * 1. Redistributions of source code must retain the above copyright
   16  *    notice, this list of conditions and the following disclaimer.
   17  * 2. Redistributions in binary form must reproduce the above copyright
   18  *    notice, this list of conditions and the following disclaimer in the
   19  *    documentation and/or other materials provided with the distribution.
   20  * 3. Neither the name of the University nor the names of its contributors
   21  *    may be used to endorse or promote products derived from this software
   22  *    without specific prior written permission.
   23  *
   24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   34  * SUCH DAMAGE.
   35  *
   36  * $DragonFly: src/sys/emulation/43bsd/43bsd_stats.c,v 1.5 2006/06/05 07:26:07 dillon Exp $
   37  *      from: DragonFly kern/kern_descrip.c,v 1.16
   38  *      from: DragonFly kern/vfs_syscalls.c,v 1.21
   39  *
   40  * These syscalls used to live in kern/kern_descrip.c and
   41  * kern/vfs_syscalls.c.  They are modified * to use the new split syscalls.
   42  */
   43 
   44 #include "opt_compat.h"
   45 
   46 #include <sys/param.h>
   47 #include <sys/systm.h>
   48 #include <sys/sysproto.h>
   49 #include <sys/conf.h>
   50 #include <sys/kernel.h>
   51 #include <sys/stat.h>
   52 #include <sys/kern_syscall.h>
   53 #include <sys/namei.h>
   54 #include <sys/nlookup.h>
   55 
   56 #include <sys/mplock2.h>
   57 
   58 #include <emulation/43bsd/stat.h>
   59 
   60 static int
   61 compat_43_copyout_stat(struct stat *st, struct ostat *uaddr)
   62 {
   63         struct ostat ost;
   64         int error;
   65 
   66         ost.st_dev = st->st_dev;
   67         ost.st_ino = st->st_ino;
   68         ost.st_mode = st->st_mode;
   69         ost.st_nlink = st->st_nlink;
   70         ost.st_uid = st->st_uid;
   71         ost.st_gid = st->st_gid;
   72         ost.st_rdev = st->st_rdev;
   73         if (st->st_size < (quad_t)1 << 32)
   74                 ost.st_size = st->st_size;
   75         else
   76                 ost.st_size = -2;
   77         ost.st_atime = st->st_atime;
   78         ost.st_mtime = st->st_mtime;
   79         ost.st_ctime = st->st_ctime;
   80         ost.st_blksize = st->st_blksize;
   81         ost.st_blocks = st->st_blocks;
   82         ost.st_flags = st->st_flags;
   83         ost.st_gen = st->st_gen;
   84 
   85         error = copyout(&ost, uaddr, sizeof(ost));
   86         return (error);
   87 }
   88 
   89 /*
   90  * MPALMOSTSAFE
   91  */
   92 int
   93 sys_ofstat(struct ofstat_args *uap)
   94 {
   95         struct stat st;
   96         int error;
   97 
   98         error = kern_fstat(uap->fd, &st);
   99 
  100         if (error == 0)
  101                 error = compat_43_copyout_stat(&st, uap->sb);
  102         return (error);
  103 }
  104 
  105 /*
  106  * MPALMOSTSAFE
  107  */
  108 int
  109 sys_ostat(struct ostat_args *uap)
  110 {
  111         struct nlookupdata nd;
  112         struct stat st;
  113         int error;
  114 
  115         get_mplock();
  116         error = nlookup_init(&nd, uap->path, UIO_USERSPACE, NLC_FOLLOW);
  117         if (error == 0) {
  118                 error = kern_stat(&nd, &st);
  119                 if (error == 0)
  120                         error = compat_43_copyout_stat(&st, uap->ub);
  121                 nlookup_done(&nd);
  122         }
  123         rel_mplock();
  124         return (error);
  125 }
  126 
  127 /*
  128  * MPALMOSTSAFE
  129  */
  130 int
  131 sys_olstat(struct olstat_args *uap)
  132 {
  133         struct nlookupdata nd;
  134         struct stat st;
  135         int error;
  136 
  137         get_mplock();
  138         error = nlookup_init(&nd, uap->path, UIO_USERSPACE, 0);
  139         if (error == 0) {
  140                 error = kern_stat(&nd, &st);
  141                 if (error == 0)
  142                         error = compat_43_copyout_stat(&st, uap->ub);
  143                 nlookup_done(&nd);
  144         }
  145         rel_mplock();
  146         return (error);
  147 }

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