casts to void

[VLD/VMB]

No, I want you to do something INTELLIGENT when a write operation fails.
Properly-designed tools are NOT necessarily writing to a terminal
with their printf()s; they may be writing into a disk file on a
full filesystem or onto a communication link or a number of other
possibilities.  By assuming that your program is always being run
in its simplest mode with a human attendant, you are providing your
users with UNFRIENDLY software that will sooner or later cause them
unnecessary grief.  UNIX has enough crappy code already.  Let's
make OUR code better!