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
153
154
155
156
157
158
|
/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @brief Instantiate a Private User Environment
* @ingroup LibIOEnv
*/
/*
* Copyright (c) 2001 Fernando Ruiz Casas <fruizcasas@gmail.com>
*
* COPYRIGHT (c) 1989-2010.
* On-Line Applications Research Corporation (OAR).
*
* 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.
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <rtems/libio_.h>
#include <rtems/score/threadimpl.h>
#include <rtems/score/userextimpl.h>
#include <rtems/sysinit.h>
/**
* Instantiate a private user environment for the calling thread.
*/
static void rtems_libio_free_user_env(rtems_user_env_t *env)
{
bool uses_global_env = env == &rtems_global_user_env;
if (!uses_global_env) {
rtems_filesystem_global_location_release(env->current_directory, false);
rtems_filesystem_global_location_release(env->root_directory, false);
free(env);
}
}
rtems_status_code rtems_libio_set_private_env(void)
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
rtems_user_env_t *old_env = rtems_current_user_env;
bool uses_global_env = old_env == &rtems_global_user_env;
if (uses_global_env) {
Thread_Life_state life_state =
_Thread_Set_life_protection(THREAD_LIFE_PROTECTED);
rtems_user_env_t *new_env = calloc(1, sizeof(*new_env));
if (new_env != NULL) {
*new_env = *old_env;
new_env->root_directory =
rtems_filesystem_global_location_obtain(&old_env->root_directory);
new_env->current_directory =
rtems_filesystem_global_location_obtain(&old_env->current_directory);
if (
!rtems_filesystem_global_location_is_null(new_env->root_directory)
&& !rtems_filesystem_global_location_is_null(new_env->current_directory)
) {
Thread_Control *executing = _Thread_Get_executing();
executing->user_environment = new_env;
} else {
sc = RTEMS_UNSATISFIED;
}
if (sc != RTEMS_SUCCESSFUL) {
rtems_libio_free_user_env(new_env);
}
} else {
sc = RTEMS_NO_MEMORY;
}
_Thread_Set_life_protection(life_state);
}
return sc;
}
void rtems_libio_use_global_env(void)
{
rtems_user_env_t *env = rtems_current_user_env;
bool uses_private_env = env != &rtems_global_user_env;
if (uses_private_env) {
Thread_Life_state life_state =
_Thread_Set_life_protection(THREAD_LIFE_PROTECTED);
Thread_Control *executing;
rtems_libio_free_user_env(env);
executing = _Thread_Get_executing();
executing->user_environment = NULL;
_Thread_Set_life_protection(life_state);
}
}
static void rtems_libio_env_thread_terminate(Thread_Control *the_thread)
{
rtems_user_env_t *env = the_thread->user_environment;
if (env != NULL) {
rtems_libio_free_user_env(env);
}
}
static void rtems_libio_env_thread_restart(
Thread_Control *executing,
Thread_Control *the_thread
)
{
(void) executing;
rtems_libio_env_thread_terminate( the_thread );
}
static User_extensions_Control rtems_libio_env_extensions = {
.Callouts = {
.thread_restart = rtems_libio_env_thread_restart,
.thread_terminate = rtems_libio_env_thread_terminate
}
};
static void rtems_libio_env_init(void)
{
_User_extensions_Add_API_set(&rtems_libio_env_extensions);
}
RTEMS_SYSINIT_ITEM(
rtems_libio_env_init,
RTEMS_SYSINIT_USER_ENVIRONMENT,
RTEMS_SYSINIT_ORDER_MIDDLE
);
|
