rb_cloexec_pipe   565 include/ruby/intern.h int rb_cloexec_pipe(int fildes[2]);
rb_cloexec_pipe  5733 io.c               ret = rb_cloexec_pipe(pipes);
rb_cloexec_pipe  5736 io.c                       ret = rb_cloexec_pipe(pipes);
rb_cloexec_pipe  1395 thread_pthread.c     err = rb_cloexec_pipe(pipes);