ff                 58 file.c           struct file ff;
ff                 67 file.c           ff = *f;
ff                 72 file.c           if(ff.type == FD_PIPE)
ff                 73 file.c             pipeclose(ff.pipe, ff.writable);
ff                 74 file.c           else if(ff.type == FD_INODE){
ff                 76 file.c             iput(ff.ip);