db_method.c

这是linux下运行的mysql软件包,可用于linux 下安装 php + mysql + apach 的网络配置

/*
 * __db_set_cachesize --
 *	Set underlying cache size.
 */
static int
__db_set_cachesize(dbp, cache_gbytes, cache_bytes, ncache)
	DB *dbp;
	u_int32_t cache_gbytes, cache_bytes;
	int ncache;
{
	DB_ILLEGAL_IN_ENV(dbp, "set_cachesize");
	DB_ILLEGAL_AFTER_OPEN(dbp, "set_cachesize");

	return (dbp->dbenv->set_cachesize(
	    dbp->dbenv, cache_gbytes, cache_bytes, ncache));
}

/*
 * __db_set_cache_priority --
 *	Set cache priority for pages from this file.
 */
static int
__db_set_cache_priority(dbp, priority)
	DB *dbp;
	DB_CACHE_PRIORITY priority;
{
	/*
	 * If an underlying DB_MPOOLFILE exists, call it.  Otherwise, save
	 * the information away until DB->open is called.
	 */
	if (dbp->mpf == NULL) {
		dbp->priority = priority;
		return (0);
	}
	return (dbp->mpf->set_priority(dbp->mpf, priority));
}

/*
 * __db_set_dup_compare --
 *	Set duplicate comparison routine.
 */
static int
__db_set_dup_compare(dbp, func)
	DB *dbp;
	int (*func) __P((DB *, const DBT *, const DBT *));
{
	int ret;

	DB_ILLEGAL_AFTER_OPEN(dbp, "dup_compare");
	DB_ILLEGAL_METHOD(dbp, DB_OK_BTREE | DB_OK_HASH);

	if ((ret = dbp->set_flags(dbp, DB_DUPSORT)) != 0)
		return (ret);

	dbp->dup_compare = func;

	return (0);
}

/*
 * __db_set_encrypt --
 *	Set database passwd.
 */
static int
__db_set_encrypt(dbp, passwd, flags)
	DB *dbp;
	const char *passwd;
	u_int32_t flags;
{
	DB_CIPHER *db_cipher;
	int ret;

	DB_ILLEGAL_IN_ENV(dbp, "set_encrypt");
	DB_ILLEGAL_AFTER_OPEN(dbp, "set_encrypt");

	if ((ret = dbp->dbenv->set_encrypt(dbp->dbenv, passwd, flags)) != 0)
		return (ret);

	/*
	 * In a real env, this gets initialized with the region.  In a local
	 * env, we must do it here.
	 */
	db_cipher = (DB_CIPHER *)dbp->dbenv->crypto_handle;
	if (!F_ISSET(db_cipher, CIPHER_ANY) &&
	    (ret = db_cipher->init(dbp->dbenv, db_cipher)) != 0)
		return (ret);

	return (dbp->set_flags(dbp, DB_ENCRYPT));
}

static void
__db_set_errcall(dbp, errcall)
	DB *dbp;
	void (*errcall) __P((const char *, char *));
{
	dbp->dbenv->set_errcall(dbp->dbenv, errcall);
}

static void
__db_set_errfile(dbp, errfile)
	DB *dbp;
	FILE *errfile;
{
	dbp->dbenv->set_errfile(dbp->dbenv, errfile);
}

static void
__db_set_errpfx(dbp, errpfx)
	DB *dbp;
	const char *errpfx;
{
	dbp->dbenv->set_errpfx(dbp->dbenv, errpfx);
}

static int
__db_set_feedback(dbp, feedback)
	DB *dbp;
	void (*feedback) __P((DB *, int, int));
{
	dbp->db_feedback = feedback;
	return (0);
}

static int
__db_set_flags(dbp, flags)
	DB *dbp;
	u_int32_t flags;
{
	int ret;

	/*
	 * !!!
	 * The hash access method only takes two flags: DB_DUP and DB_DUPSORT.
	 * The Btree access method uses them for the same purposes, and so we
	 * resolve them there.
	 *
	 * The queue access method takes no flags.
	 */
	if (LF_ISSET(DB_ENCRYPT)) {
		if (!CRYPTO_ON(dbp->dbenv)) {
			__db_err(dbp->dbenv,
		    "Database environment not configured for encryption");
			return (EINVAL);
		}
		F_SET(dbp, DB_AM_ENCRYPT);
		F_SET(dbp, DB_AM_CHKSUM);
		LF_CLR(DB_ENCRYPT);
	}
	if (LF_ISSET(DB_CHKSUM_SHA1)) {
		F_SET(dbp, DB_AM_CHKSUM);
		LF_CLR(DB_CHKSUM_SHA1);
	}

	if ((ret = __bam_set_flags(dbp, &flags)) != 0)
		return (ret);
	if ((ret = __ram_set_flags(dbp, &flags)) != 0)
		return (ret);

	return (flags == 0 ? 0 : __db_ferr(dbp->dbenv, "DB->set_flags", 0));
}

/*
 * __db_set_lorder --
 *	Set whether lorder is swapped or not.
 *
 * PUBLIC: int  __db_set_lorder __P((DB *, int));
 */
int
__db_set_lorder(dbp, db_lorder)
	DB *dbp;
	int db_lorder;
{
	int ret;

	DB_ILLEGAL_AFTER_OPEN(dbp, "set_lorder");

	/* Flag if the specified byte order requires swapping. */
	switch (ret = __db_byteorder(dbp->dbenv, db_lorder)) {
	case 0:
		F_CLR(dbp, DB_AM_SWAP);
		break;
	case DB_SWAPBYTES:
		F_SET(dbp, DB_AM_SWAP);
		break;
	default:
		return (ret);
		/* NOTREACHED */
	}
	return (0);
}

static int
__db_set_alloc(dbp, mal_func, real_func, free_func)
	DB *dbp;
	void *(*mal_func) __P((size_t));
	void *(*real_func) __P((void *, size_t));
	void (*free_func) __P((void *));
{
	DB_ILLEGAL_IN_ENV(dbp, "set_alloc");
	DB_ILLEGAL_AFTER_OPEN(dbp, "set_alloc");

	return (dbp->dbenv->set_alloc(dbp->dbenv,
	    mal_func, real_func, free_func));
}

static int
__db_set_pagesize(dbp, db_pagesize)
	DB *dbp;
	u_int32_t db_pagesize;
{
	DB_ILLEGAL_AFTER_OPEN(dbp, "set_pagesize");

	if (db_pagesize < DB_MIN_PGSIZE) {
		__db_err(dbp->dbenv, "page sizes may not be smaller than %lu",
		    (u_long)DB_MIN_PGSIZE);
		return (EINVAL);
	}
	if (db_pagesize > DB_MAX_PGSIZE) {
		__db_err(dbp->dbenv, "page sizes may not be larger than %lu",
		    (u_long)DB_MAX_PGSIZE);
		return (EINVAL);
	}

	/*
	 * We don't want anything that's not a power-of-2, as we rely on that
	 * for alignment of various types on the pages.
	 */
	if (!POWER_OF_TWO(db_pagesize)) {
		__db_err(dbp->dbenv, "page sizes must be a power-of-2");
		return (EINVAL);
	}

	/*
	 * XXX
	 * Should we be checking for a page size that's not a multiple of 512,
	 * so that we never try and write less than a disk sector?
	 */
	dbp->pgsize = db_pagesize;

	return (0);
}

static int
__db_set_paniccall(dbp, paniccall)
	DB *dbp;
	void (*paniccall) __P((DB_ENV *, int));
{
	return (dbp->dbenv->set_paniccall(dbp->dbenv, paniccall));
}

static int
__db_stat_fail(dbp, sp, flags)
	DB *dbp;
	void *sp;
	u_int32_t flags;
{
	COMPQUIET(sp, NULL);
	COMPQUIET(flags, 0);

	/*
	 * DB->stat isn't initialized until the actual DB->open call,
	 * but we don't want to core dump.
	 */
	PANIC_CHECK(dbp->dbenv);
	DB_ILLEGAL_BEFORE_OPEN(dbp, "DB->stat");

	/* NOTREACHED */
	return (EINVAL);
}

#ifdef HAVE_RPC
/*
 * __dbcl_init --
 *	Initialize a DB structure on the server.
 */
static int
__dbcl_init(dbp, dbenv, flags)
	DB *dbp;
	DB_ENV *dbenv;
	u_int32_t flags;
{
	TAILQ_INIT(&dbp->free_queue);
	TAILQ_INIT(&dbp->active_queue);
	/* !!!
	 * Note that we don't need to initialize the join_queue;  it's
	 * not used in RPC clients.  See the comment in __dbcl_db_join_ret().
	 */

	dbp->associate = __dbcl_db_associate;
	dbp->close = __dbcl_db_close;
	dbp->cursor = __dbcl_db_cursor;
	dbp->del = __dbcl_db_del;
	dbp->err = __dbh_err;
	dbp->errx = __dbh_errx;
	dbp->fd = __dbcl_db_fd;
	dbp->get = __dbcl_db_get;
	dbp->get_byteswapped = __db_get_byteswapped;
	dbp->get_type = __db_get_type;
	dbp->join = __dbcl_db_join;
	dbp->key_range = __dbcl_db_key_range;
	dbp->open = __dbcl_db_open_wrap;
	dbp->pget = __dbcl_db_pget;
	dbp->put = __dbcl_db_put;
	dbp->remove = __dbcl_db_remove;
	dbp->rename = __dbcl_db_rename;
	dbp->set_alloc = __dbcl_db_alloc;
	dbp->set_append_recno = __dbcl_db_set_append_recno;
	dbp->set_cachesize = __dbcl_db_cachesize;
	dbp->set_cache_priority = __dbcl_db_cache_priority;
	dbp->set_dup_compare = __dbcl_db_dup_compare;
	dbp->set_encrypt = __dbcl_db_encrypt;
	dbp->set_errcall = __db_set_errcall;
	dbp->set_errfile = __db_set_errfile;
	dbp->set_errpfx = __db_set_errpfx;
	dbp->set_feedback = __dbcl_db_feedback;
	dbp->set_flags = __dbcl_db_flags;
	dbp->set_lorder = __dbcl_db_lorder;
	dbp->set_pagesize = __dbcl_db_pagesize;
	dbp->set_paniccall = __dbcl_db_panic;
	dbp->stat = __dbcl_db_stat;
	dbp->sync = __dbcl_db_sync;
	dbp->truncate = __dbcl_db_truncate;
	dbp->upgrade = __dbcl_db_upgrade;
	dbp->verify = __dbcl_db_verify;

	/*
	 * Set all the method specific functions to client funcs as well.
	 */
	dbp->set_bt_compare = __dbcl_db_bt_compare;
	dbp->set_bt_maxkey = __dbcl_db_bt_maxkey;
	dbp->set_bt_minkey = __dbcl_db_bt_minkey;
	dbp->set_bt_prefix = __dbcl_db_bt_prefix;
	dbp->set_h_ffactor = __dbcl_db_h_ffactor;
	dbp->set_h_hash = __dbcl_db_h_hash;
	dbp->set_h_nelem = __dbcl_db_h_nelem;
	dbp->set_q_extentsize = __dbcl_db_extentsize;
	dbp->set_re_delim = __dbcl_db_re_delim;
	dbp->set_re_len = __dbcl_db_re_len;
	dbp->set_re_pad = __dbcl_db_re_pad;
	dbp->set_re_source = __dbcl_db_re_source;

	return (__dbcl_db_create(dbp, dbenv, flags));
}
#endif