#include <unistd.h> for getopt(3) call.
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@ -51,6 +51,7 @@ static char const sccsid[] = "@(#)printf.c 8.1 (Berkeley) 7/20/93";
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#ifdef SHELL
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#define main printfcmd
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