title: two file descriptors to same file
body: <p>Using the posix read() write() linux calls, is it guaranteed that if I write through one file descriptor and read through another file descriptor, in a serial fashion such that the two actions are mutually exclusive of each other... that my read file descriptor will always see what was written last by the write file descriptor?</p>
  
  <p>i believe this is the case, but I want to make sure and the man page isn't very helpful on this</p>