__NR_dup3
__SYSCALL(__NR_dup3, sys_dup3)
#if defined(__NR_dup3)
return my_syscall3(__NR_dup3, old, new, 0);
#if defined(__NR_dup3)
return my_syscall3(__NR_dup3, old, new, flags);
__SYSCALL(__NR_dup3, sys_dup3)
return syscall(__NR_dup3, oldfd, newfd, flags);