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
|
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* Fluent Bit
* ==========
* Copyright (C) 2015-2022 The Fluent Bit Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <fluent-bit/flb_info.h>
#include <fluent-bit/flb_input_plugin.h>
#include <fluent-bit/flb_sqldb.h>
#include "systemd_config.h"
#include "systemd_db.h"
struct query_status {
int rows;
char *cursor;
time_t updated;
};
static int cb_cursor_check(void *data, int argc, char **argv, char **cols)
{
struct query_status *qs = data;
qs->cursor = flb_strdup(argv[0]); /* cursor string */
qs->updated = atoll(argv[1]); /* timestamp */
qs->rows++;
return 0;
}
static int cb_count_check(void *data, int argc, char **argv, char **cols)
{
struct query_status *qs = data;
qs->rows = atoll(argv[0]);
return 0;
}
/* sanitize database table if required */
static void flb_systemd_db_sanitize(struct flb_sqldb *db,
struct flb_input_instance *ins)
{
int ret;
struct query_status qs = {0};
memset(&qs, '\0', sizeof(qs));
ret = flb_sqldb_query(db,
SQL_COUNT_CURSOR, cb_count_check, &qs);
if (ret != FLB_OK) {
flb_plg_error(ins, "db: failed counting number of rows");
return;
}
if (qs.rows > 1) {
flb_plg_warn(ins,
"db: table in_systemd_cursor looks corrupted, it has "
"more than one entry (rows=%i), the table content will be "
"fixed", qs.rows);
/* Delete duplicates, we only preserve the last record based on it ROWID */
ret = flb_sqldb_query(db, SQL_DELETE_DUPS, NULL, NULL);
if (ret != FLB_OK) {
flb_plg_error(ins, "could not delete in_systemd_cursor duplicates");
return;
}
flb_plg_info(ins, "table in_systemd_cursor has been fixed");
}
}
struct flb_sqldb *flb_systemd_db_open(const char *path,
struct flb_input_instance *ins,
struct flb_systemd_config *ctx,
struct flb_config *config)
{
int ret;
char tmp[64];
struct flb_sqldb *db;
/* Open/create the database */
db = flb_sqldb_open(path, ins->name, config);
if (!db) {
return NULL;
}
/* Create table schema if it don't exists */
ret = flb_sqldb_query(db, SQL_CREATE_CURSOR, NULL, NULL);
if (ret != FLB_OK) {
flb_plg_error(ins, "db: could not create 'cursor' table");
flb_sqldb_close(db);
return NULL;
}
if (ctx->db_sync >= 0) {
snprintf(tmp, sizeof(tmp) - 1, SQL_PRAGMA_SYNC,
ctx->db_sync);
ret = flb_sqldb_query(db, tmp, NULL, NULL);
if (ret != FLB_OK) {
flb_plg_error(ctx->ins, "db could not set pragma 'sync'");
flb_sqldb_close(db);
return NULL;
}
}
flb_systemd_db_sanitize(db, ins);
return db;
}
int flb_systemd_db_close(struct flb_sqldb *db)
{
flb_sqldb_close(db);
return 0;
}
int flb_systemd_db_init_cursor(struct flb_systemd_config *ctx, const char *cursor)
{
int ret;
char query[PATH_MAX];
struct query_status qs = {0};
/* Check if the file exists */
memset(&qs, '\0', sizeof(qs));
ret = flb_sqldb_query(ctx->db,
SQL_GET_CURSOR, cb_cursor_check, &qs);
if (ret != FLB_OK) {
return -1;
}
if (qs.rows == 0) {
/* Register the cursor */
snprintf(query, sizeof(query) - 1,
SQL_INSERT_CURSOR,
cursor, time(NULL));
ret = flb_sqldb_query(ctx->db,
query, NULL, NULL);
if (ret == FLB_ERROR) {
return -1;
}
return 0;
}
return -1;
}
int flb_systemd_db_set_cursor(struct flb_systemd_config *ctx, const char *cursor)
{
int ret;
/* Bind parameters */
sqlite3_bind_text(ctx->stmt_cursor, 1, (char *) cursor, -1, 0);
sqlite3_bind_int64(ctx->stmt_cursor, 2, time(NULL));
ret = sqlite3_step(ctx->stmt_cursor);
sqlite3_clear_bindings(ctx->stmt_cursor);
sqlite3_reset(ctx->stmt_cursor);
if (ret != SQLITE_DONE) {
return -1;
}
return 0;
}
char *flb_systemd_db_get_cursor(struct flb_systemd_config *ctx)
{
int ret;
struct query_status qs = {0};
memset(&qs, '\0', sizeof(qs));
ret = flb_sqldb_query(ctx->db,
SQL_GET_CURSOR, cb_cursor_check, &qs);
if (ret != FLB_OK) {
return NULL;
}
if (qs.rows > 0) {
/* cursor must be freed by the caller */
return qs.cursor;
}
return NULL;
}
|
