Page 117 - slides.dvi

•
•
•
•
•
Unix
–
–
–
–
–
–
–
–
A
File
Case
fd
fd
file
also
=
=
reply
reply
Devices
bytes
is
Study—
count
=
=
support
=
an
Operations
=
Files
Hierarchical
have
Represented
open
and
on
in
the
above
Abstraction
files
seek(fd,
read(fd,
represented
close(fd)
write(fd,
ioctl’s:
structure
Filesystem
by
are:
unstructured
creat(pathname,
(pathname,
user-space
offset,
buffer,
allow
buffer,
operations,
by
special
a
mode)
supported
mode)
sequence
access
file
nbytes)
by
whence)
files:
nbytes)
of
to
although
bytes.
directory
descriptor
perhaps
(fd)
files.
with
device-specific
bizarre
functionality.
semantics.
113