sys/emulation/43bsd/43bsd_stats.c

   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. All advertising materials mentioning features or use of this software
  21  *    must display the following acknowledgement:
  22  *      This product includes software developed by the University of
  23  *      California, Berkeley and its contributors.
  24  * 4. Neither the name of the University nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  *
  40  * $DragonFly: src/sys/emulation/43bsd/43bsd_stats.c,v 1.5 2006/06/05 07:26:07 dillon Exp $
  41  *      from: DragonFly kern/kern_descrip.c,v 1.16
  42  *      from: DragonFly kern/vfs_syscalls.c,v 1.21
  43  *
  44  * These syscalls used to live in kern/kern_descrip.c and
  45  * kern/vfs_syscalls.c.  They are modified * to use the new split syscalls.
  46  */
  47
  48 #include "opt_compat.h"
  49
  50 #include <sys/param.h>
  51 #include <sys/systm.h>
  52 #include <sys/sysproto.h>
  53 #include <sys/conf.h>
  54 #include <sys/kernel.h>
  55 #include <sys/stat.h>
  56 #include <sys/kern_syscall.h>
  57 #include <sys/namei.h>
  58 #include <sys/nlookup.h>
  59
  60 #include <emulation/43bsd/stat.h>
  61
  62 static int
  63 compat_43_copyout_stat(struct stat *st, struct ostat *uaddr)
  64 {
  65         struct ostat ost;
  66         int error;
  67
  68         ost.st_dev = st->st_dev;
  69         ost.st_ino = st->st_ino;
  70         ost.st_mode = st->st_mode;
  71         ost.st_nlink = st->st_nlink;
  72         ost.st_uid = st->st_uid;
  73         ost.st_gid = st->st_gid;
  74         ost.st_rdev = st->st_rdev;
  75         if (st->st_size < (quad_t)1 << 32)
  76                 ost.st_size = st->st_size;
  77         else
  78                 ost.st_size = -2;
  79         ost.st_atime = st->st_atime;
  80         ost.st_mtime = st->st_mtime;
  81         ost.st_ctime = st->st_ctime;
  82         ost.st_blksize = st->st_blksize;
  83         ost.st_blocks = st->st_blocks;
  84         ost.st_flags = st->st_flags;
  85         ost.st_gen = st->st_gen;
  86
  87         error = copyout(&ost, uaddr, sizeof(ost));
  88         return (error);
  89 }
  90
  91 int
  92 sys_ofstat(struct ofstat_args *uap)
  93 {
  94         struct stat st;
  95         int error;
  96
  97         error = kern_fstat(uap->fd, &st);
  98
  99         if (error == 0)
 100                 error = compat_43_copyout_stat(&st, uap->sb);
 101         return (error);
 102 }
 103
 104 int
 105 sys_ostat(struct ostat_args *uap)
 106 {
 107         struct nlookupdata nd;
 108         struct stat st;
 109         int error;
 110
 111         error = nlookup_init(&nd, uap->path, UIO_USERSPACE, NLC_FOLLOW);
 112         if (error == 0) {
 113                 error = kern_stat(&nd, &st);
 114                 if (error == 0)
 115                         error = compat_43_copyout_stat(&st, uap->ub);
 116                 nlookup_done(&nd);
 117         }
 118         return (error);
 119 }
 120
 121 int
 122 sys_olstat(struct olstat_args *uap)
 123 {
 124         struct nlookupdata nd;
 125         struct stat st;
 126         int error;
 127
 128         error = nlookup_init(&nd, uap->path, UIO_USERSPACE, 0);
 129         if (error == 0) {
 130                 error = kern_stat(&nd, &st);
 131                 if (error == 0)
 132                         error = compat_43_copyout_stat(&st, uap->ub);
 133                 nlookup_done(&nd);
 134         }
 135         return (error);
 136 }