dup2               36 lib/dup2.c     # undef dup2
dup2              113 lib/dup2.c     dup2 (int fd, int desired_fd)
dup2              305 lib/unistd.in.h #   define dup2 rpl_dup2
dup2              317 lib/unistd.in.h # undef dup2