FD_PIPE            76 kernel/file.c    if(ff.type == FD_PIPE){
FD_PIPE           114 kernel/file.c    if(f->type == FD_PIPE){
FD_PIPE           142 kernel/file.c    if(f->type == FD_PIPE){
FD_PIPE            38 kernel/pipe.c    (*f0)->type = FD_PIPE;
FD_PIPE            42 kernel/pipe.c    (*f1)->type = FD_PIPE;