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
|
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "db.h"
#define DATABASE "access.db"
int
main()
{
extern int errno;
DB *dbp;
DBT key, data;
if ((errno = db_open(DATABASE,
DB_BTREE, DB_CREATE, 0664, NULL, NULL, &dbp)) != 0) {
fprintf(stderr, "db: %s: %s\n", DATABASE, strerror(errno));
exit (1);
}
memset(&key, 0, sizeof(key));
memset(&data, 0, sizeof(data));
key.data = "fruit";
key.size = sizeof("fruit");
data.data = "apple";
data.size = sizeof("apple");
switch (errno = dbp->put(dbp, NULL, &key, &data, 0)) {
case 0:
printf("db: %s: key stored.\n", (char *)key.data);
break;
default:
fprintf(stderr, "db: put: %s\n", strerror(errno));
exit (1);
}
switch (errno = dbp->get(dbp, NULL, &key, &data, 0)) {
case 0:
printf("db: %s: key retrieved: data was %s.\n",
(char *)key.data, (char *)data.data);
break;
case DB_NOTFOUND:
printf("db: %s: key not found.\n", (char *)key.data);
break;
default:
fprintf(stderr, "db: get: %s\n", strerror(errno));
exit (1);
}
switch (errno = dbp->del(dbp, NULL, &key, 0)) {
case 0:
printf("db: %s: key was deleted.\n", (char *)key.data);
break;
default:
fprintf(stderr, "db: del: %s\n", strerror(errno));
exit (1);
}
switch (errno = dbp->get(dbp, NULL, &key, &data, 0)) {
case 0:
printf("db: %s: key retrieved: data was %s.\n",
(char *)key.data, (char *)data.data);
break;
case DB_NOTFOUND:
printf("db: %s: key not found.\n", (char *)key.data);
break;
default:
fprintf(stderr, "db: get: %s\n", strerror(errno));
exit (1);
}
switch (errno = dbp->close(dbp, 0)) {
case 0:
printf("db: database closed.\n");
break;
default:
fprintf(stderr, "db: get: %s\n", strerror(errno));
exit (1);
}
exit(0);
}
|
