HelenOS sources

dup2              179 uspace/lib/pcut/src/os/unix.c 		dup2(link_stdout[1], STDOUT_FILENO);
dup2              181 uspace/lib/pcut/src/os/unix.c 		dup2(link_stderr[1], STDERR_FILENO);
dup2               98 uspace/lib/posix/include/posix/unistd.h extern int dup2(int fildes, int fildes2);