asked on 9/9/2013

C Programming: Working with OPEN(2) and File Descriptors

After reading about OPEN(2), I am still confused about the returned value.

http://man7.org/linux/man-pages/man2/open.2.html

It says that the returned value is a File Descriptor, but I tried googling it, and cannot find much about file descriptors, and how to use them.

I have a project that requires me to work with file descriptors, and I would like to learn more about their built-in functions.

Can you please provide a examples of working with "fd" after using the OPEN command?

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mccarl

9/10/2013

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ozo

9/9/2013

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ASKER CERTIFIED SOLUTION

mccarl

9/9/2013

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pzozulka

9/9/2013

ASKER

Thanks to both of you. mccarl, your explanation is extremely clear, so no further advice is needed. I'm sure I'll be posting more questions about this project soon.

mccarl

9/10/2013

Not a problem, glad to help!

C is a general-purpose, imperative computer programming language, supporting structured programming, lexical variable scope and recursion, while a static type system prevents many unintended operations. By design, C provides constructs that map efficiently to typical machine instructions, so it has found lasting use in applications that had formerly been coded in assembly language, including operating systems as well as various application software for computers ranging from supercomputers to embedded systems. It is distinct from C++ (which has its roots in C) and C#, and many later languages have borrowed directly or indirectly from C.

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