dup2             271 ext/pty/pty.c  	dup2(slave,0);
dup2             272 ext/pty/pty.c  	dup2(slave,1);
dup2             273 ext/pty/pty.c  	dup2(slave,2);
dup2             1959 io.c           		dup2(pr[1], 1);
dup2             1966 io.c           		dup2(pw[0], 0);
dup2             2235 io.c           	if (dup2(fileno(orig->f), fd) < 0)
dup2             2240 io.c           	if (dup2(fileno(orig->f), fd) < 0)
dup2             2253 io.c           	    if (dup2(fileno(orig->f2), fd) < 0)
dup2             2610 io.c           	dup2(saved_fd[0], 0);
dup2             2616 io.c           	dup2(fileno(fptr->f), 0);
dup2             2651 io.c           	dup2(saved_fd[fd], fd);
dup2             2657 io.c           	dup2(fileno(fptr->f), fd);