Processes - Evan Carlstrom#374

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ecarlstrom wants to merge 24 commits intobloominstituteoftechnology:masterfrom ecarlstrom:master

+142-5

Commits on Feb 20, 2019

initial commit
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ex1 code and questions complete
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initial code idea for ex2 added, figuring out a good way to test this to help with answering questions
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added parent/child cases for ex2
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forgot to add write capability (r -> r+)
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fixed variable name error (fp - file_pointer, forgot to change after referencing example code)
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completed ex2 with questions and text example appearing properly in the file
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ex3 complete, child/parent printing is working properly
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ex4 complete, today's MVP met. Going to keep looking at the ex3 syntax changes to learn more about process ordering and the different versions of exec() from ex4.
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reviewing some ex3 changes to learn more about the effects of waitpid()
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found the issue: I had the waitpid() after the printf() statement initially, child process now always prints first and waitpid() is in the proper location
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added error handling to ex1
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added error handling to ex2
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added error handling to ex3
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