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
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
/* readclock - manipulate the hardware real time clock */
#include <sys/types.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <time.h>
#include <errno.h>
#include <lib.h>
#include <minix/type.h>
#include <minix/const.h>
#include <minix/callnr.h>
#include <minix/log.h>
#include <minix/syslib.h>
#include <minix/sysutil.h>
#include <minix/com.h>
#include <minix/type.h>
#include <minix/safecopies.h>
#include "readclock.h"
static struct rtc rtc;
static struct log log = {
.name = "readclock",
.log_level = LEVEL_INFO,
.log_func = default_log
};
/* functions for transfering struct tm to/from this driver and calling proc. */
static int fetch_t(endpoint_t who_e, vir_bytes rtcdev_tm, struct tm *t);
static int store_t(endpoint_t who_e, vir_bytes rtcdev_tm, struct tm *t);
/* SEF functions and variables. */
static void sef_local_startup(void);
static int sef_cb_init(int type, sef_init_info_t * info);
int
main(int argc, char **argv)
{
int r;
endpoint_t caller;
struct tm t;
message m;
int ipc_status, reply_status;
env_setargs(argc, argv);
sef_local_startup();
while (TRUE) {
/* Receive Message */
r = sef_receive_status(ANY, &m, &ipc_status);
if (r != OK) {
log_warn(&log, "sef_receive_status() failed\n");
continue;
}
if (is_ipc_notify(ipc_status)) {
/* Do not reply to notifications. */
continue;
}
caller = m.m_source;
log_debug(&log, "Got message 0x%x from 0x%x\n", m.m_type,
caller);
switch (m.m_type) {
case RTCDEV_GET_TIME:
/* Any user can read the time */
reply_status = rtc.get_time(&t, m.m_lc_readclock_rtcdev.flags);
if (reply_status != OK) {
break;
}
/* write results back to calling process */
reply_status =
store_t(caller, m.m_lc_readclock_rtcdev.tm, &t);
break;
case RTCDEV_SET_TIME:
/* Only super user is allowed to set the time */
if (getnuid(caller) == SUPER_USER) {
/* read time from calling process */
reply_status =
fetch_t(caller, m.m_lc_readclock_rtcdev.tm,
&t);
if (reply_status != OK) {
break;
}
reply_status =
rtc.set_time(&t, m.m_lc_readclock_rtcdev.flags);
} else {
reply_status = EPERM;
}
break;
case RTCDEV_PWR_OFF:
/* Only PM is allowed to set the power off time */
if (caller == PM_PROC_NR) {
reply_status = rtc.pwr_off();
} else {
reply_status = EPERM;
}
break;
default:
/* Unrecognized call */
reply_status = EINVAL;
break;
}
/* Send Reply */
m.m_type = RTCDEV_REPLY;
m.m_readclock_lc_rtcdev.status = reply_status;
log_debug(&log, "Sending Reply");
r = ipc_sendnb(caller, &m);
if (r != OK) {
log_warn(&log, "ipc_sendnb() failed\n");
continue;
}
}
rtc.exit();
return 0;
}
static int
sef_cb_init(int type, sef_init_info_t * UNUSED(info))
{
int r;
r = arch_setup(&rtc);
if (r != OK) {
log_warn(&log, "Clock setup failed\n");
return r;
}
r = rtc.init();
if (r != OK) {
log_warn(&log, "Clock initalization failed\n");
return r;
}
return OK;
}
static void
sef_local_startup()
{
/*
* Register init callbacks. Use the same function for all event types
*/
sef_setcb_init_fresh(sef_cb_init);
sef_setcb_init_lu(sef_cb_init);
sef_setcb_init_restart(sef_cb_init);
/* Let SEF perform startup. */
sef_startup();
}
int
bcd_to_dec(int n)
{
return ((n >> 4) & 0x0F) * 10 + (n & 0x0F);
}
int
dec_to_bcd(int n)
{
return ((n / 10) << 4) | (n % 10);
}
static int
fetch_t(endpoint_t who_e, vir_bytes rtcdev_tm, struct tm *t)
{
return sys_datacopy(who_e, rtcdev_tm, SELF, (vir_bytes) t,
sizeof(struct tm));
}
static int
store_t(endpoint_t who_e, vir_bytes rtcdev_tm, struct tm *t)
{
return sys_datacopy(SELF, (vir_bytes) t, who_e, rtcdev_tm,
sizeof(struct tm));
}
|
