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Annotation of 42BSD/lib/libc/gen/isatty.c, revision 1.1

1.1     ! root        1: /* @(#)isatty.c        4.1 (Berkeley) 12/21/80 */
        !             2: /*
        !             3:  * Returns 1 iff file is a tty
        !             4:  */
        !             5: 
        !             6: #include <sgtty.h>
        !             7: 
        !             8: isatty(f)
        !             9: {
        !            10:        struct sgttyb ttyb;
        !            11: 
        !            12:        if (gtty(f, &ttyb) < 0)
        !            13:                return(0);
        !            14:        return(1);
        !            15: }

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