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why use dup? (not dup2)

Josh CodeJosh Code Member Posts: 675
Why would anyone use the unix/linux dup function?

I know that dup2 is useful but I'm confused about why someone use a function that seems to just return another number for the same job.

Why do we care if the file descriptor is the smallest available? We will store the value in a variable anyway. It seems like it might aswell be any int value.
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