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#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/time.h>
#include "tdb.h"
/* a tdb tool for manipulating a tdb database */
static TDB_CONTEXT *tdb;
static void help(void)
{
printf("
tdbtool:
create dbname : create a database
open dbname : open an existing database
erase : erase the database
dump : dump the database as strings
insert key data : insert a record
store key data : store a record (replace)
show key : show a record by key
delete key : delete a record by key
");
}
static void terror(char *why)
{
printf("%s\n", why);
}
static void create_tdb(void)
{
char *tok = strtok(NULL, " ");
if (!tok) {
help();
return;
}
if (tdb) tdb_close(tdb);
tdb = tdb_open(tok, 0, TDB_CLEAR_IF_FIRST,
O_RDWR | O_CREAT | O_TRUNC, 0600);
}
static void open_tdb(void)
{
char *tok = strtok(NULL, " ");
if (!tok) {
help();
return;
}
if (tdb) tdb_close(tdb);
tdb = tdb_open(tok, 0, 0, O_RDWR, 0600);
}
static void insert_tdb(void)
{
char *k = strtok(NULL, " ");
char *d = strtok(NULL, " ");
TDB_DATA key, dbuf;
if (!k || !d) {
help();
return;
}
key.dptr = k;
key.dsize = strlen(k);
dbuf.dptr = d;
dbuf.dsize = strlen(d);
if (tdb_store(tdb, key, dbuf, TDB_INSERT) == -1) {
terror("insert failed");
}
}
static void store_tdb(void)
{
char *k = strtok(NULL, " ");
char *d = strtok(NULL, " ");
TDB_DATA key, dbuf;
if (!k || !d) {
help();
return;
}
key.dptr = k;
key.dsize = strlen(k);
dbuf.dptr = d;
dbuf.dsize = strlen(d);
if (tdb_store(tdb, key, dbuf, TDB_REPLACE) == -1) {
terror("store failed");
}
}
static void show_tdb(void)
{
char *k = strtok(NULL, " ");
TDB_DATA key, dbuf;
if (!k) {
help();
return;
}
key.dptr = k;
key.dsize = strlen(k);
dbuf = tdb_fetch(tdb, key);
if (!dbuf.dptr) terror("fetch failed");
printf("%s : %*.*s\n", k, (int)dbuf.dsize, (int)dbuf.dsize, dbuf.dptr);
}
static void delete_tdb(void)
{
char *k = strtok(NULL, " ");
TDB_DATA key;
if (!k) {
help();
return;
}
key.dptr = k;
key.dsize = strlen(k);
if (tdb_delete(tdb, key) != 0) {
terror("delete failed");
}
}
static int print_rec(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf, void *state)
{
printf("%*.*s : %*.*s\n",
(int)key.dsize, (int)key.dsize, key.dptr,
(int)dbuf.dsize, (int)dbuf.dsize, dbuf.dptr);
return 0;
}
static int total_bytes;
static int traverse_fn(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf, void *state)
{
total_bytes += dbuf.dsize;
return 0;
}
static void info_tdb(void)
{
int count;
total_bytes = 0;
count = tdb_traverse(tdb, traverse_fn, NULL);
printf("%d records totalling %d bytes\n", count, total_bytes);
}
static char *getline(char *prompt)
{
static char line[1024];
char *p;
fputs(prompt, stdout);
line[0] = 0;
p = fgets(line, sizeof(line)-1, stdin);
if (p) p = strchr(p, '\n');
if (p) *p = 0;
return p?line:NULL;
}
static int do_delete_fn(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf,
void *state)
{
return tdb_delete(tdb, key);
}
int main(int argc, char *argv[])
{
char *line;
char *tok;
while ((line = getline("tdb> "))) {
/* Shell command */
if (line[0] == '!') {
system(line + 1);
continue;
}
tok = strtok(line," ");
if (strcmp(tok,"create") == 0) {
create_tdb();
continue;
} else if (strcmp(tok,"open") == 0) {
open_tdb();
continue;
}
/* all the rest require a open database */
if (!tdb) {
terror("database not open");
help();
continue;
}
if (strcmp(tok,"insert") == 0) {
insert_tdb();
} else if (strcmp(tok,"store") == 0) {
store_tdb();
} else if (strcmp(tok,"show") == 0) {
show_tdb();
} else if (strcmp(tok,"erase") == 0) {
tdb_traverse(tdb, do_delete_fn, NULL);
} else if (strcmp(tok,"delete") == 0) {
delete_tdb();
} else if (strcmp(tok,"dump") == 0) {
tdb_traverse(tdb, print_rec, NULL);
} else if (strcmp(tok,"info") == 0) {
info_tdb();
} else {
help();
}
}
if (tdb) tdb_close(tdb);
return 0;
}
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