writev()

[IfYouSaySo]

I am trying to replace send() with writev() to eliminate a copy operation in the network code. I know with send there needs to be logic for partial writes, is this also true for writev? Are there any guarantees about an entire iov block being written at each write? It seems like the code for partial writes on a writev would be alot more complex than the basic loop that can be used for a send...

Thanks for any info.

[IfYouSaySo]

This is for many unixes, so I don't think sendfile is an option. The data that is being sent is from data structures built up in memory. I didn't realize that send (or writev) would send all data if you have it in blocking mode. Is this documented somewhere? Thanks.