Techniques for handling short reads/writes with scatter-gather?

Question

Scatter-gather - readv()/writev()/preadv()/pwritev() - reads/writes a variable number of iovec structs in a single system call. Basically it reads/write each buffer sequentiall

Answer 1

Vectored write will write all the data you have provided with one call to "writev" function. So byteswritten will be always be equal to total number of bytes provided as input. this is what my understanding is.

Please correct me if I am wrong