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Date:      Sat, 17 Jan 2015 12:59:05 -0500
From:      less xss <less.xss@gmail.com>
To:        freebsd-hackers@freebsd.org
Subject:   ctrl-d appends characters to output
Message-ID:  <CAGcjGpP0t3%2BcJLRHS5Ggfjao9Vcy0xosAg2KqBWgVA_NtKoNgA@mail.gmail.com>
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I've searched around quite a bit with no luck on this matter. I currently
have an issue where I send EOF (ctrl-d) to some simple K&R2 exercises and
the terminal returns the D character appended to my data when EOF is sent.
I wish to prevent any and all extra characters from being appended and I
would also like to understand why it's happening. The following code
is an example exercise from K&R2 that yield said problem.

#include <stdio.h>

int main() {
    double nc;

    for (nc = 0; getchar() != EOF; ++nc) {
        ; /* syntactic null statement */
    }

    printf("%.0f\n", nc);
}

$ ./a.out
0D
$

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