Stevens Institute of Technology - Department of Computer Science

CS631 Week 12 Checkpoint

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Describe each one log level and facility not mentioned in the videos:

Use the nonblock.c program to write data in non-blocking mode (./a.out nonblock) into a pipe, a fifo, and over the network (e.g., via nc(1)).
Describe and explain your observation:

Rewrite flock.c to use fcntl(2).
Note any observations here:

Give a practical example of when it might be useful to use asynchronous I/O:

Review the NetBSD source code for cp(1) - why/when is mmap(2) used here?
Why is it not used for all I/O?