Important Opening Fact

Manual pages for Unix/C|C++ are in Chapter 3 of the manual Use:

man 3 ______

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Outstanding Issues From Last Week

If a program's output is redirected to a file, then stdout is no longer line buffered. It becomes fully buffered.
 Line buffering means the stdout buffer is flushed on intro of a newline into the stream.
To get the value from an exit() via a wait(), it must be accessed using WEXITSTATUS(code), which provides the lowest 8 bits.
See waitTest.c
Also, waitTest.c shows use of waitpid().
How is the exit status of a program started in the background accessed?
For a background process, waitpid() is used.
The third argument can be used to make wait() non-suspending. To wit:
WNOHANG
              The waitpid() function shall not suspend execution of the  callâ
              ing thread if status is not immediately available for one of the
              child processes specified by pid.
Process Termination
- The signals in a Unix/Linux system have differing default actions.
  * For some, the default action is that they are ignored if not caught
    + e.g. wait() and waitpid() catch SIGCHLD, otherwise, it is ignored, i.e. if no wait() is issued.
  * Others have a default action that they terminate the process to which they are applied
    + Ctrl-C generates a SIGINT in the kernel, which is sent to the process and terminates it, unless
    -> it is set to be ignored
    -> it is specifically caught
  * Two signals can't have their default action changed, and can't be ignored or caught
    + SIGKILL
    + SIGSTOP - ^Z

- Command to generate a signal    kill(signal,pid)

- A terminating process sends SIGCHLD to its parent.

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Project 1

Command-line arguments

       0. p1

createBin
csv file
Binary output of createBin
printRecs
# records to print
Reading a binary file requires an fseek() and an fread(). This can also be done with streams. Open the binary file using (I think) ios::bin

Look up how to read binary data via a stream.
Project 1 Web Area on acad:
There should be a directory public_html in your root directory. 

If no such directory, inform me at once... by 12 Noon Sat.
PolygonList Doxygen Website

https://acad.kutztown.edu/~spiegel/DoxygenDemo/PolygonList/index.html