how to setup rate of ftp?

noc,I have the CD and found the file “src.zip”,but it can’t be unzip using winrar under winxp,Could you send me the files about “pure-ftpd” ? by the way,Can I unzip it under qnx?

Check this article:
openqnx.com/Article117.html
and you can find the download link for the source code in the tar.gz format.
Once you have downloaded src.tar.gz, you can unpack it in QNX:
tar zxvf src.tar.gz

my god,I download the file and try to unzip it in QNX,but after unpacking some file it said “unexpect end and return error” and stop,the bad thing is “pure-ftpd” hasn’t been created,noc,Can I unpack one directory from the file?

It is not unzip, it is untar, you should run the command:

tar zxvf src.tar.gz

If it still gives you errors, that means your download is corrupted, try to download again.

Yes, you can just extract one directory, eg:
tar zxvf src.tar.gz src/pure-ftpd

OK, to save you some time, I downloaded/unpacked the pure-ftpd src for you. See attached:

noc,I have compiled it,but when I use it to control bandwidth,the tranmitting speed is not the value I expect,Have you ever tried it before?

No, I haven’t tried that.
You will have to ask the pureftpd team, or post on their mailing list. Find a web proxy so that you can access their web site at pureftpd.org/
Good luck!