ff                 62 kernel/file.c    struct file ff;
ff                 71 kernel/file.c    ff = *f;
ff                 76 kernel/file.c    if(ff.type == FD_PIPE){
ff                 77 kernel/file.c      pipeclose(ff.pipe, ff.writable);
ff                 78 kernel/file.c    } else if(ff.type == FD_INODE || ff.type == FD_DEVICE){
ff                 80 kernel/file.c      iput(ff.ip);