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C - STDIN, STDOUT

Started by ace84_84 Nov 29, 2005 at 9:08 PM 1 replies 1k views

Original Post

Nov 29, 2005 at 9:08 PM

I am writing a program where i dup2 the STDIN (0) with my file descriptor number, then i do the same for the STDOUT (1). So when i write i am actually writing to the stdout. my problem is i am having trouble reading the data from the stdin. will a simple scanf do the trick or will i need to use a system call like fgets to get the data????

JohnBolton

132

JohnBolton

Nov 30, 2005 at 12:49 AM

fgets and scanf are both part of the same set of stdio functions. You could use either depending on what you want to do. What is the problem you are having?

Shadowdancer

Nov 30, 2005 at 6:09 AM

In order to use a file descriptor with the fprintf/fscanf family of functions, you'll have to associate the descriptor with a stream. Have a look at the fdopen function for that.

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