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#include <fcntl.h>
#include <unistd.h>
#include "fd.h"
int fd_copy(to,from)
int to;
int from;
{
if (to == from) return 0;
if (fcntl(from,F_GETFL,0) == -1) return -1;
close(to);
if (fcntl(from,F_DUPFD,to) == -1) return -1;
return 0;
}
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