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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