Informix 7.x Space problems

Do any of you have any nifty little procedures or sql programs that will tell you how much disk space you actually have in use for a particular database? The problem I am experiencing is I have a java developer that tried to create an index on one of the tables on our demo/test server. When he submitted this, it came back with an error which he claimed was concerning out of disk space error. As soon as I get a chance to break free from my planning to migrate to IDS2000 that I am in the middle of, I was going to sit down with him and try to get more info then the sketchy details he gave me. So if you happen to have anything that looks at data in sysmaster/sysutil concerning space and any other metrics that might be useful in finding the real problem, please do send it this way. Thanks. Scott