Page 98 - slides.dvi
P. 98
•
•
•
•
4.
1.
2.
3.
–
2.
1.
File
Operating
if
Once
Create
all
copy
copy
Closing
Systems
a
Opening
create
a
various
—
a
have
file
directory
invalidate
goes
new
[new]
new
file:
file:
Filesystem
UFID
modes
file
Operations
well,
file:
UFID
control
service
UFID
can
UFID
(see
(I)
Interface
status
=
and
UFID
control
=
block
4
1
3
2
UFID
=
read,
next
eventually
into
recursively
return
block
SFID
10532
7122
23421
3250
get
slide)
write,
to
back
etc.
SFID
memory.
searches
to
close(UFID)
caller.
of
for
disk.
file.
open(<pathname>)
create(<pathname>)
" "
" "
" "
components
File Control Block (Copy)
of
location on disk, size,...
<pathname>
94