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/* $Id$ */
/*
* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <signal.h>
#include <string.h>
#ifndef _PUBLIC_
#define _PUBLIC_
#endif
#include <tdb.h>
#include "fdm.h"
int db_print_item(TDB_CONTEXT *, TDB_DATA, TDB_DATA, void *);
int db_expire_item(TDB_CONTEXT *, TDB_DATA, TDB_DATA, void *);
int db_clear_item(TDB_CONTEXT *, TDB_DATA, TDB_DATA, void *);
TDB_CONTEXT *
db_open(char *path)
{
TDB_CONTEXT *db;
#ifndef DB_UNSAFE
db = tdb_open(path, 0, 0, O_RDWR|O_CREAT, S_IRUSR|S_IWUSR);
#else
db = tdb_open(path, 0, TDB_NOLOCK, O_RDWR|O_CREAT, S_IRUSR|S_IWUSR);
#endif
return (db);
}
void
db_close(TDB_CONTEXT *db)
{
tdb_close(db);
}
int
db_add(TDB_CONTEXT *db, char *k)
{
TDB_DATA key, value;
struct cacheitem v;
uint64_t tim;
memset(&v, 0, sizeof v);
tim = time(NULL);
v.tim = htole64(tim);
key.dptr = k;
key.dsize = strlen(k);
value.dptr = (char *) &v;
value.dsize = sizeof v;
return (tdb_store(db, key, value, TDB_REPLACE));
}
int
db_remove(TDB_CONTEXT *db, char *k)
{
TDB_DATA key;
key.dptr = k;
key.dsize = strlen(k);
return (tdb_delete(db, key));
}
int
db_contains(TDB_CONTEXT *db, char *k)
{
TDB_DATA key;
key.dptr = k;
key.dsize = strlen(k);
return (tdb_exists(db, key));
}
int
db_size(TDB_CONTEXT *db)
{
return (tdb_traverse(db, NULL, NULL));
}
int
db_print_item(
unused TDB_CONTEXT *tdb, unused TDB_DATA key, TDB_DATA value, void *ptr)
{
void (*p)(const char *, ...) = ptr;
struct cacheitem v;
uint64_t tim;
if (value.dsize != sizeof v)
return (-1);
memcpy(&v, value.dptr, sizeof v);
tim = letoh64(v.tim);
p("%.*s %llu", key.dsize, key.dptr, (unsigned long long) tim);
return (0);
}
int
db_print(TDB_CONTEXT *db, void (*p)(const char *, ...))
{
if (tdb_traverse(db, db_print_item, p) == -1)
return (-1);
return (0);
}
int
db_expire_item(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA value, void *ptr)
{
uint64_t *lim = ptr;
struct cacheitem v;
if (value.dsize != sizeof v)
return (-1);
memcpy(&v, value.dptr, sizeof v);
if (letoh64(v.tim) < *lim)
return (tdb_delete(tdb, key));
return (0);
}
int
db_expire(TDB_CONTEXT *db, uint64_t age)
{
uint64_t lim;
lim = time(NULL);
if (lim <= age)
return (0);
lim -= age;
if (tdb_traverse(db, db_expire_item, &lim) == -1)
return (-1);
return (0);
}
int
db_clear_item(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA value, unused void *ptr)
{
if (value.dsize != sizeof (struct cacheitem))
return (-1);
return (tdb_delete(tdb, key));
}
int
db_clear(TDB_CONTEXT *db)
{
if (tdb_traverse(db, db_clear_item, NULL) == -1)
return (-1);
return (0);
}
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