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o0zi · May 22nd, 2005, 8:48 AM

I have a piece of code that looks like this:

---example.c---

#include <stdio.h>

int main() {
        char c;
        while ((c = getchar()) && (c != EOF))
                ;
        putchar('\n');
        c = getchar();
        printf("%c\n", c);
}

Entering input from the keyboard, this program works fine.
However, if I then redirect input to this program (e.g. dmesg | ./example), then I get a garbage character printed to the console, and the program does not wait for input from the keyboard.
I assume this is something to do with resetting stdin - how can I pass input back to the keyboard when stdin has been set to receive input from a redirect?

Thanks,
Rob

May 22nd, 2005, 8:48 AM	#1
o0zi Newbie Join Date: May 2005 Posts: 1 Rep Power: 0	Resetting stdin after EOF I have a piece of code that looks like this: ---example.c--- (Toggle Plain Text) #include <stdio.h> int main() { char c; while ((c = getchar()) && (c != EOF)) ; putchar('\n'); c = getchar(); printf("%c\n", c); } #include <stdio.h> int main() { char c; while ((c = getchar()) && (c != EOF)) ; putchar('\n'); c = getchar(); printf("%c\n", c); } Entering input from the keyboard, this program works fine. However, if I then redirect input to this program (e.g. dmesg \| ./example), then I get a garbage character printed to the console, and the program does not wait for input from the keyboard. I assume this is something to do with resetting stdin - how can I pass input back to the keyboard when stdin has been set to receive input from a redirect? Thanks, Rob