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  * 4. 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 }