Radio Shack TRS-80 model III Owner's Manual page 35

TRS-80
MODEL
III
DISK SYSTEM
i^*U^M^^^-;t^'fmiimh
level for
access,
tf
omitted
Level
Degree
of
access granted by access
word
FULL
KILL
NAME
WRITE
READ
EXEC
Full
access,
no
protection.
Kill,
rename,
read, execute,
and
write (gives
total
access,
i.e.,
the least-protected).
Rename,
read, execute,
and
write.
Read,
execute, and
write.
Read
and
execute.
Execute
only.
Note: Each
level allows access
to itself plus
all
lower
levels.
attrib
lets
you change
the passwords
to
an
existing
file
or
makes
the
file
invisible or non-invisible.
Passwords
are
initially
assigned when
the
file
is
created.
At
that
time, the
update
and
access words
are
set to
the
same
value
(either
the
password you
specified or a blank password).
Examples
ATTRIB DATAFILE
(
I
,ACO
JULY14
»UPD
=
M0USE
,
PR0T
= READ
)
Makes
the
file invisible, sets
the access
password
to
julyh
and
the update
password
to
mouse. Use
of
the
access
word
will allow only reading
and
executing
the
file.
ATTRIB PAYROLL/BAS, SECRET (N»ACC=»)
Sets the
access
word
to blanks.
The
file is
made
non-invisible and
the protection
level assigned
to
the update word
is left
unchanged.
ATTRIB OLD/DAT. APPLES <UPD=»)
Sets the
update
word
to blanks.
ATTRIB PAYROLL/BAS,
PW
(PR0T=EXEC)
Leaves
the access and
update words unchanged,
but changes
the level of
access.
Sample
Uses
Suppose you have
a data
file,
payroll, and you want
an employee
to use
the
hie
in
preparing paychecks.
You
want
the
employee
to be
able
to
read
the
file
but not
to
change
it.
Then
use
a
command
like:
28