-
Notifications
You must be signed in to change notification settings - Fork 98
/
log_blackbox.c
209 lines (181 loc) · 4.63 KB
/
log_blackbox.c
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
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
/*
* Copyright (C) 2011 Red Hat, Inc.
*
* All rights reserved.
*
* Author: Angus Salkeld <asalkeld@redhat.com>
*
* libqb is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 2.1 of the License, or
* (at your option) any later version.
*
* libqb 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with libqb. If not, see <http://www.gnu.org/licenses/>.
*/
#include "os_base.h"
#include <qb/qbrb.h>
#include "util_int.h"
#include "log_int.h"
static void
_blackbox_reload(int32_t target)
{
struct qb_log_target *t = qb_log_target_get(target);
if (t->instance == NULL) {
return;
}
qb_rb_close(t->instance);
t->instance = qb_rb_open(t->filename, t->size,
QB_RB_FLAG_CREATE | QB_RB_FLAG_OVERWRITE, 0);
}
/* <u32> file lineno
* <u32> function name length
* <string> function name
* <u32> buffer length
* <string> buffer
*/
static void
_blackbox_vlogger(int32_t target,
struct qb_log_callsite *cs, time_t timestamp, va_list ap)
{
size_t max_size;
size_t actual_size;
size_t fn_size;
char *chunk;
struct qb_log_target *t = qb_log_target_get(target);
if (t->instance == NULL) {
return;
}
fn_size = strlen(cs->function) + 1;
actual_size = 2 * sizeof(uint32_t) + fn_size + sizeof(time_t);
max_size = actual_size + QB_LOG_MAX_LEN;
chunk = qb_rb_chunk_alloc(t->instance, max_size);
/* line number */
memcpy(chunk, &cs->lineno, sizeof(uint32_t));
chunk += sizeof(uint32_t);
/* function name */
memcpy(chunk, &fn_size, sizeof(uint32_t));
chunk += sizeof(uint32_t);
memcpy(chunk, cs->function, fn_size);
chunk += fn_size;
/* timestamp */
memcpy(chunk, ×tamp, sizeof(time_t));
chunk += sizeof(time_t);
/* log message */
actual_size += qb_vsprintf_serialize(chunk, cs->format, ap);
(void)qb_rb_chunk_commit(t->instance, actual_size);
}
static void
_blackbox_close(int32_t target)
{
struct qb_log_target *t = qb_log_target_get(target);
if (t->instance) {
qb_rb_close(t->instance);
t->instance = NULL;
}
}
int32_t
qb_log_blackbox_open(struct qb_log_target *t)
{
if (t->size < 1024) {
return -EINVAL;
}
snprintf(t->filename, PATH_MAX, "%s-blackbox", t->name);
t->instance = qb_rb_open(t->filename, t->size,
QB_RB_FLAG_CREATE | QB_RB_FLAG_OVERWRITE, 0);
if (t->instance == NULL) {
return -errno;
}
t->logger = NULL;
t->vlogger = _blackbox_vlogger;
t->reload = _blackbox_reload;
t->close = _blackbox_close;
return 0;
}
ssize_t
qb_log_blackbox_write_to_file(const char *filename)
{
ssize_t written_size = 0;
struct qb_log_target *t;
int fd = open(filename, O_CREAT | O_RDWR, 0700);
if (fd < 0) {
return -errno;
}
t = qb_log_target_get(QB_LOG_BLACKBOX);
if (t->instance) {
written_size = qb_rb_write_to_file(t->instance, fd);
} else {
written_size = -ENOENT;
}
close(fd);
return written_size;
}
void
qb_log_blackbox_print_from_file(const char *bb_filename)
{
qb_ringbuffer_t *instance;
ssize_t bytes_read;
char chunk[512];
int fd;
char time_buf[64];
fd = open(bb_filename, 0);
if (fd < 0) {
qb_util_perror(LOG_ERR, "qb_log_blackbox_print_from_file");
return;
}
instance = qb_rb_create_from_file(fd, 0);
close(fd);
if (instance == NULL) {
return;
}
do {
char *ptr;
uint32_t lineno;
uint32_t fn_size;
char *function;
uint32_t len;
time_t timestamp;
char message[QB_LOG_MAX_LEN];
uint32_t u32;
bytes_read = qb_rb_chunk_read(instance, chunk, 512, 0);
ptr = chunk;
if (bytes_read > 0) {
struct tm *tm;
/* lineno */
memcpy(&lineno, ptr, sizeof(uint32_t));
ptr += sizeof(uint32_t);
/* function size & name */
memcpy(&fn_size, ptr, sizeof(uint32_t));
ptr += sizeof(uint32_t);
function = ptr;
ptr += fn_size;
/* timestamp size & content */
memcpy(&u32, ptr, sizeof(uint32_t));
timestamp = u32;
ptr += sizeof(time_t);
tm = localtime(×tamp);
if (tm) {
(void)strftime(time_buf,
sizeof(time_buf), "%b %d %T",
tm);
} else {
snprintf(time_buf, sizeof(time_buf), "%ld",
(long int)timestamp);
}
/* message content */
len = qb_vsnprintf_deserialize(message, QB_LOG_MAX_LEN, ptr);
len--;
while (message[len] == '\n' || message[len] == '\0') {
message[len] = '\0';
len--;
}
printf("%s %s():%d %s\n",
time_buf, function, lineno, message);
}
} while (bytes_read > 0);
}