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##</code><code>##

NAME
       dup, dup2 - duplicate a file descriptor

SYNOPSIS
       #include <unistd.h>

       int dup(int oldfd);
       int dup2(int oldfd, int newfd);

DESCRIPTION
       dup and dup2 create a copy of the file descriptor oldfd.

       After successful return of dup or dup2, the old and new descriptors may
       be used interchangeably. 
##</code><code>##


       The two descriptors do not share the close-on-exec flag, however.