Subversion Repositories planix.SVN

#include "lib.h"
#include <unistd.h>
#include <errno.h>

int
dup(int oldd)
{
        return fcntl(oldd, F_DUPFD, 0);
}

int
dup2(int oldd, int newd)
{
        if(newd < 0 || newd >= OPEN_MAX){
                errno = EBADF;
                return -1;
        }
        if(oldd == newd && _fdinfo[newd].flags&FD_ISOPEN)
                return newd;
        close(newd);
        return fcntl(oldd, F_DUPFD, newd);
}