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Otros manuales para este modelo:
Resumen del manual
If
the
pro cess
issues
more
than
one
HPFOPEN
or
FOPEN
call
for
a
le
b efore
it
is
closed,
it
results
in
m
ultiple,
logically
separate
accesses
of
that
le.
In
this
case,
MPE/iX
returns
a
unique
le
n
um
b er
for
eac
h
access
and
maintains
a
separate
logical
record
p ointer.
(indicating
the
next
sequen
tial
record
to
b e
accessed)
for
eac
h
access
where
y
ou
did
not
request
or
p ermit
the
multi-ac
c
ess
option
at
HPFOPEN
or
FOPEN
time.
When
y
ou
op en
a
le,
HPFOPEN
or
FOPEN
establishes
a
comm
unication
link
b et
w
een
the
le
and
y
our
program.
The
link
is
established
b
y
determining
the
device
on
whic
h
the
le
resides,
allo
cating
it
to
y
our
pro cess,
v
erifying
access
right,
and
p erforming
other
required
tasks.
These
tasks
include
constructing
con
trol
blo
c
ks
required
b
y
MPE/iX
for
access
to
this
le.
F
or
detailed
information
on
establishing
the
comm
unication
link
and
determining
the
File
System
hierarch
y
,
refer
to
A
c
c
essing
Files
Pr
o
gr
ammer's
Guide
(32650-90017).
F
or
an
example
of
op ening
new
and
old
disc
les,
refer
to
A
c
c
essing
Files
Pr
o
gr
ammer's
Guide
(32650-90017).
When
a
pro cess
op ens
a
disc
le,
the
HPFOPEN
or
FOPEN
call
sp ecies
that
the
le
is
OLD
(lo
cated
in
either
the
System
P
ermanen
t
File
Directory
or
the
Job
T
emp orary
File
Directory)
or
NEW .
An
OLD
le
is
an
existing
le,
and
a
NEW
le
is
a
le
to
b e
created
during
the
pro cess.
When
a
pro cess
accesses
a
le
residing
on
a
non-sharable
device,
the
device's
attributes
may
o
v
erride
the
OLD
or
NEW
sp ecication.
Sp ecically
,
a
device
used
only
for
input
automatically
imp oses
a
PERMANENT
domain
on
a
le.
A
device
used
only
for
output,
suc
h
as
a
line
prin
ter,
automatically
imp oses
a
NEW
domain
on
a
le.
Serial
input/output
devices,
suc
h
as
terminals
and
magnetic
tap
e
units,
follow
the
domain
option
sp ecication
in
the
HPFOPEN
or
FOPEN
call.
The
HPFOPEN
in
trinsic
assumes
that
all
les
on
non-sharable
devices
(device
Note
les)
are
PERMANENT
les.
T
o
maintain
compatibility
with
MPE
V/E,
device
les
can
b e
op ened
with
the
domain
option
set
to
NEW ,
but
a
w
arning
is
returned
in
the
status
parameter.
When
a
job
attempts
to
op en
a
PERMANENT
le
on
a
non-sharable
device,
MPE/iX
searc
hes
for
the
le
in
its
in
ternal
tables.
If
it
do es
not
nd
the
le,
it
requests
the
op erator
to
lo
cate
the
le.
When
a
job
op ens
a
new
le
on
a
non-sharable
device
(other
than
magnetic
tap
e),
it
uses
the
rst
a
v
ailable
device.
When
a
job
op ens
a
new
le
on
a
magnetic
tap
e
unit,
the
op erator
is
usually
required
to
make
the
tap
e
a
v
ailable.
The
sp ecication
of
a
device
name
or
device
class
when
HPFOPEN
or
FOPEN
is
issued,
implies
a
request
for
the
initial
allo
cation
of
an
unop ened
device.
F
or
detailed
information
on,
and
examples
of,
op ening
a
le
on
a
non-sharable
device,
refer
to
A
c
c
essing
Files
Pr
o
gr
ammer's
Guide
(32650-90017).
Closing
a
File
Y
ou
terminate
access
to
a
le
from
a
program
with
the
FCLOSE
in
trinsic.
It
applies
to
les
on
all
devices
(disc
les
and
device
les)
and
deallo
cates
the
device
on
whic
h
the
le
resides.
If
y
our
program
has
sev
eral
concurren
t
HPFOPEN
or
FOPEN
calls
issued
to
the
same
le,
the
device
is
not
deallo
cated
un
til
the
last
FCLOSE
in
trinsic
is
executed.
Y
ou
can
use
the
FCLOSE
in
trinsic
to
c
hange
the
disp osition
of
a
disc
or
magnetic
tap
e
le.
F
or
example,
a
le
y
ou
op en
as
a
NEW
le
can
b e
closed
and
sa
v
ed
as
an
OLD
le
with
p ermanen
t
or
temp orary
disp osition.
A
disc
le
y
ou
op en
as
a
TEMP
le
can
b e
closed
as
TEMP
or
sa
v
ed
as
a
PERMANENT
le.
File
System
6-17
...Otros modelos de este manual:
Software - MPE/iX 6.5 Operating System (946.26 kb)
Software - MPE/iX 7.0 Operating System (946.26 kb)
Software - MPE/iX 7.5 Operating System (946.26 kb)