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
140
141
142
143
144
145
146
147
148
149
150
151
152
|
/*
Copyright (C) 1994 Free Software Foundation
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "priv.h"
#include "fs_S.h"
#include <fcntl.h>
/* Implement fs.defs:file_invoke_translator as described in <hurd/fs.defs>. */
kern_return_t
diskfs_S_file_invoke_translator (struct protid *cred,
int flags,
retry_type *retry,
char *retry_name,
mach_port_t *retrypt,
mach_msg_type_name_t *retrypttype)
{
#if 0
/* XXX */
static mach_port_t _diskfs_dotdot_file = MACH_PORT_NULL;
error_t error = 0;
mode_t type;
struct node *np;
/* This code is very similar (but subtly different) from
dir-pathtrans.c and fsys-getroot.c. A way should be found to
combine them. */
if (!cred)
return EOPNOTSUPP;
flags &= O_HURD;
np = cred->po->np;
mutex_lock (&np->lock);
type = np->dn_stat.st_mode & S_IFMT;
repeat_transcheck:
/* Ignore O_NOTRANS in the following check */
if (np->istranslated || np->translator.control != MACH_PORT_NULL)
{
mach_port_t control = np->translator.control;
if (control == MACH_PORT_NULL)
{
/* This use of _diskfs_dotdot_file is completely and utterly
bogus. XXX */
if (error = diskfs_start_translator (np, _diskfs_dotdot_file))
{
mutex_unlock (&np->lock);
return error;
}
control = np->translator.control;
}
mach_port_mod_refs (mach_task_self (), control, MACH_PORT_RIGHT_SEND, 1);
mutex_unlock (&np->lock);
error = fsys_getroot (control, cred->uids, cred->nuids,
cred->gids, cred->ngids, flags, retry,
retry_name, retrypt);
if (error == MACH_SEND_INVALID_DEST)
{
mutex_lock (&np->lock);
if (np->translator.control == control)
fshelp_translator_drop (&np->translator);
mach_port_deallocate (mach_task_self (), control);
error = 0;
goto repeat_transcheck;
}
if (!error && *retrypt != MACH_PORT_NULL)
*retrypttype = MACH_MSG_TYPE_MOVE_SEND;
else
*retrypttype = MACH_MSG_TYPE_COPY_SEND;
return error;
}
/* Ignore O_NOTRANS here. */
if (type == S_IFLNK && !(flags & O_NOLINK))
{
/* Handle symlink interpretation */
char pathbuf[np->dn_stat.st_size + 1];
int amt;
if (diskfs_read_symlink_hook)
error = (*diskfs_read_symlink_hook) (np, pathbuf);
if (!diskfs_read_symlink_hook || error == EINVAL)
error = diskfs_node_rdwr (np, pathbuf, 0, np->dn_stat.st_size, 0,
0, &amt);
pathbuf[amt] = '\0';
mutex_unlock (&np->lock);
if (error)
return error;
if (pathbuf[0] == '/')
{
*retry = FS_RETRY_MAGICAL;
*retrypt = MACH_PORT_NULL;
*retrypttype = MACH_MSG_TYPE_COPY_SEND;
strcpy (retry_name, pathbuf);
return 0;
}
else
{
*retry = FS_RETRY_REAUTH;
*retrypt = _diskfs_dotdot_file;
*retrypttype = MACH_MSG_TYPE_COPY_SEND;
strcpy (retry_name, pathbuf);
return 0;
}
}
if ((type == S_IFSOCK || type == S_IFBLK
|| type == S_IFCHR || type == S_IFIFO)
&& (flags & (O_READ|O_WRITE|O_EXEC)))
error = EOPNOTSUPP;
flags &= ~OPENONLY_STATE_MODES;
*retry = FS_RETRY_NONE;
retry_name[0] = '\0';
*retrypt = (ports_get_right
(diskfs_make_protid
(diskfs_make_peropen (np, flags, _diskfs_dotdot_file),
cred->uids, cred->nuids, cred->gids, cred->ngids)));
*retrypttype = MACH_MSG_TYPE_MAKE_SEND;
mutex_unlock (&np->lock);
return 0;
#else
return EOPNOTSUPP;
#endif
}
|
