1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/*
* Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* 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 Hyra 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
*/
#include <sys/vfs.h>
#include <sys/vnode.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/namei.h>
#include <sys/stat.h>
#include <sys/limits.h>
#include <sys/errno.h>
#include <sys/types.h>
#include <sys/filedesc.h>
#include <string.h>
static int
vfs_dostat(const char *path, struct stat *sbuf)
{
char pathbuf[PATH_MAX];
struct vattr *attr;
struct stat st;
struct vnode *vp;
struct vop_getattr_args gattr;
struct nameidata nd;
int error;
if (sbuf == NULL || path == NULL) {
return -EINVAL;
}
if ((copyinstr(path, pathbuf, sizeof(path))) < 0) {
return -EFAULT;
}
nd.path = path;
nd.flags = 0;
if ((error = namei(&nd)) != 0) {
return error;
}
vp = nd.vp;
gattr.vp = vp;
error = vfs_vop_getattr(vp, &gattr);
if (error != 0) {
return error;
}
attr = gattr.res;
memset(&st, VNOVAL, sizeof(st));
/* Copy stat data to userspace statbuf */
st.st_mode = attr->mode;
st.st_size = attr->size;
copyout(&st, sbuf, sizeof(*sbuf));
return 0;
}
static int
vfs_doopen(const char *pathname, int flags)
{
char pathbuf[PATH_MAX];
if (copyinstr(pathname, pathbuf, PATH_MAX) < 0) {
return -EFAULT;
}
return fd_open(pathbuf, flags);
}
/*
* arg0: pathname
* arg1: oflags
*
* TODO: Use oflags.
*/
scret_t
sys_open(struct syscall_args *scargs)
{
return vfs_doopen((char *)scargs->arg0, scargs->arg1);
}
/*
* arg0: fd
*/
scret_t
sys_close(struct syscall_args *args)
{
return fd_close(args->arg0);
}
/*
* arg0: fd
* arg1: buf
* arg2: count
*/
scret_t
sys_read(struct syscall_args *scargs)
{
return fd_read(scargs->arg0, (void *)scargs->arg1,
scargs->arg2);
}
/*
* arg0: path
* arg1: buf
*/
scret_t
sys_stat(struct syscall_args *scargs)
{
return vfs_dostat((const char *)scargs->arg0, (void *)scargs->arg1);
}
|
