free.c

该代码为unix环境高级编程的源代码

#include	"db.h"

/* Free up a DB structure, and all the malloc'ed buffers it
 * may point to.  Also close the file descriptors if still open. */

int
_db_free(DB *db)
{
	if (db->idxfd >= 0 && close(db->idxfd) < 0)
		err_dump("index close error");
	if (db->datfd >= 0 && close(db->datfd) < 0)
		err_dump("data close error");
	db->idxfd = db->datfd = -1;

	if (db->idxbuf != NULL)
		free(db->idxbuf);
	if (db->datbuf != NULL)
		free(db->datbuf);
	if (db->name != NULL)
		free(db->name);
	free(db);
	return(0);
}