►
From YouTube: .NET Core Design Reviews: MAX_PATH Review
Description
In this meeting we'll take a look at a more concrete proposal to address the MAX_PATH issues in .NET.
A
It
also
does
a
few
other
things
I
caught
in
the
windows,
api
behavior
comparison
piece,
notably,
that
it
trims
all
trailing
spaces
and
periods
at
the
end
of
the
path.
You
know
if
it's
like
passed,
the
final
separators
or
whatever
the
file
name
is,
and
does
a
few
other
minor
tweaks
to
internal
segments,
which
is
mainly
taking
off
the
the
last
dot.
A
A
B
A
A
A
A
Correct
and
ethics:
that's
that's
kind
of
the
way
that,
like
the
the
general
api's
that
have
seen
so
far
on
unix
to
like
the
differentiation
between
the
two
like
there's,
there's
get
final
path
on
Windows
your
final
path,
name
that
actually
does
like
analyze
links
and
get
the
keys
change
set
up
other
stuff
and
there's
some
things.
I
call
it
up
for
evasion
and
we
do
probably
need
that
people
already
asked
for
that.
Our
last
design
review
they
want
to
get
canonical
type
of
thing.
A
A
Correct
and
that's
that's
the
final
path,
so
there's
a
logical
equivalency
and
then
there's
like
for
a
pad
for
a
string
right.
Is
this
the
same
logical
path?
How
do
I?
Compare
those?
That's
the
answer
to
the
end
you
get
to
the
absolute
path.
The
actual
final
path
includes
the
links
right
or
the
symlinks,
and
all
that
which
is
something
we
don't
have
right
now
that
again,
people
are
asking
for
an
entry
point
into
that
stuff.
Oh,
that
that's
something
I'll
bring
up
to
the
table
later.
This
is
to
get
to
that
next.
A
A
Right
so
there's
the
it's,
this
mac
compatibility
thing:
483,
that's
still
there
in
like.
We
don't
even
get
it
quite
right,
so
I
talked
about
that
in
here
a
little
bit
as
well,
but
we
try
to
move
like
the
existing
code
inside
get
full
path.
Tries
to
mimic
would
get
full
path.
Name
is
doing
and
doesn't
get
it
right.
I
call
that
out
at
the
very
end
in
the
last
segment,
which
is
the
API
behavior
comparison
which
talks
about
what
talks
about
my
back
actual
the
the
windows
api
does
and
then
how
gipfel
path
differs.
A
There
are
a
few
additional
checks
on
there
that
we
try
and
like
prevent
you
from
using
global
route
and
like
do
some
checks
for
like
HTTP
the
fuel
of
things
like
that.
Those
are
still
legacy,
behaviors
that
we
can
do
beyond
the
trying
to
normalize.
The
way
windows
does-
and
you
know
my
intent
here-
is
to
actually
like
defer
to
them
modular
these
other
like
blocks
that
we
have
in
place
we're
trying
to
mimic
it
ourselves
and
also
whenever
turning
short
pass
around.
Even
though
we
don't
get
back
correct
right
now,
you
keep
that
behavior.
A
A
So
we'll
do
that
same
behavior,
but
like
rather
than
do
it
as
we
forward
through
the
string
will
move
backwards
at
the
end
after
we've
normalized,
because
we
need
all
so
need.
The
other
contract
that
we
have
is
that
the
file
doesn't
have
to
exist
on
disk
right
and
that's
kind
of
also
falls
into
those
absolute
path.
A
Questions
right.
So
when
we,
even
though
we
do
hit
the
disk
for
this
83,
we
totally
deal
if
it,
we
can't
find
something
in
that
portion
of
the
path
we
just
keep
walking
up
the
path
until
we
do
or
we
don't.
If
we
don't
find
anything
that
we
just
don't
care
will
always
give
you
that
path
back.
So
if
you
had
a
tilde
in
there
and
there
is
no
actual
path
that
vid
you'll
just
get
that
till
the
back
right.
So
that's!
That's
the
way
the
current
behavior
works
and
it's
unfortunate.
A
We
have
to
do
that
on
the
window
side
because
it
does
impact
a
perv
but
like
well
I'll.
Do
some
optimizations
around
that
and
I
will
still
keep
it
with
that
like
incorrect
behavior,
because
getting
it
correct
but
actually
further
hurt
right.
So
then
I'll
also
look
at
the
possibility
of
adding
some
additional
checks
in
there
as
well,
because
like
it's
not
just
that
it
has
to
be
12
characters,
will
they
told
it
and
it's
they
have
to
be
Stalin
characters,
which
is
a
really
limited
subsidence,
the
ASCII
sub
right.
A
A
Continue
and
only
do
that,
we're
going
to
push
it
to
the
end
and
walk
backwards
through
the
screen,
rather
than
keep
doing
it
repeatedly
as
we
go
through,
and
then
you
know
we're
going
to
rely
on
get
full
path.
Name,
the
windows
api
by
jamming
the
path
in
ourselves-
and
this
is
actually
what
get
full
pathname
does
itself.
It
literally
just
puts
the
strings
together
and
like
if
the
kids
current
directory,
it's
a.
B
A
B
But
you
get
a
gold
yeah
normalization
like
following
links
or
casing
the
result,
I
think
its
ears
I
think
there's
kind
of
two
questions:
it's
one:
how?
What
is
the
OS
representation
of
this
path?
The
logical
path,
not
the
final
bout,
so
final
path?
And
what
is
the
thing
that
this
half
points
to
and
they're
different
questions
and
the
problem
is
I?
Think
we
need
I,
don't
know
if
we
need
the
latter
API,
but
we
definitely
need.
B
A
B
A
Right,
it's
a
little
tricky
to
get
to,
and
it's
one
of
the
other
discussions
are
going
to
bring
up
lady
or
to
the
thai,
depending
that's
like
around
the
casing
problem,
because,
like
the
current
api
is
that
are
out
there
for
getting
a
case.
Normalized
path
have
nothing
to
do
with
a
logical
path.
That's
all
about
the
final
path,
so
links
are
always
evaluated.
A
B
A
B
A
B
B
A
I
think
it's
actually
pretty
likely
that
they'll
be
busted,
because
these
actually
sinks
these
slip
in
in
a
lot
of
places,
recurrent
behaviors
like
in
the
shell
and
stuff
or
longer
pass
where
it
will
turn
them
into
short,
pass,
so
strings
leaked
into
the
system
of
the
short
passes.
You
don't
expect
it
I
got
none
of
the
short
filenames
to
be
clear
that
an
ugly
long.
B
A
A
B
A
Correct,
that's
what
it
currently
does,
but
it's
also
incorrect
right.
So
what
we're
already
not
meeting
the
guarantee?
Well,
it's
like,
because
you
can
actually
knit
you
can
call
the
api's,
you
call
it
whatever
you
want.
You
can
set
the
alternate
naina
so
mean
as
long
as
it
fits
the
the
character
set
that
the
doss
uses,
which
limits
at
some.
A
But
given
that
that's
one
thing
that
actually
pushes
me
towards
like
get
rid
of
the
damn
thing,
because
it's
not
right
anyway,
but
I
hesitate
also
as
well,
because
it's
pretty
significant
change
in
behavior
right
this
part,
because
people
compare
what
comes
out
of
these
things
pretty
frequently.
That's
really.
The
idea
with
this
is
that
you
can
call
this
and
you
can
do
some
path.
A
Comparisons
when
it
as
long
as
you
in
our
case
and
like
deal
with
the
fact
that
you
have
a
trailing
sort
of
things,
then
weren't
you
also
proposing
some
kind
of
comparing.
Yes,
yes,
yeah
I
did
I
feasting.
Remember
nobody
want
to
do
moment
so
that
isn't,
that
is
on
the
backlog,
two
things
that
I
want
to
offer
throughs
like
they're
things
that
will
allow
you
to
compare
because
they're
there
are
other
formats
like
this
would
mainly
have
around
extended
pass
and
like
there's
some
additional
been
so
kind
of
here
but
yeah.
A
We
need
some
things
to
like
start
getting
people
to
consistent
and
actually
get
things
correct,
because
the
coroner
cases
are
really
broad
easy
to
stumble
into
so
not
the
sort
of
thing
you
will
everybody
to
have
to
figure
out
by
accident.
Like
is
there
one
in
10,000
users
hit
it,
and
then
it
can't
figure
out
what
the
heck
went
wrong,
because
the
follow
up
those
words
things
pretty
obscure,
sometimes
so.
A
There
are
the
one
different
I
like
relying
on
Windows.
Is
that
doing
this?
Is
that,
like
we
already,
we
like
trim
out
trailing
spaces
and
and
stuff
inside
the
segments
that
wouldn't
happen
anymore,
but
the
only
fall
out
for
that
is
actually
on
create
directory
right,
because
crate
directory
doesnot
actually
does
it
recursive
create,
and
the
mitigation
for
this
is
simply
to
have
create
directory
when
it's
creating
individual
directories
as
long
as
they're,
not
an
extended
syntax
to
like
do
the
vet
legacy
trimming
so
that
we
don't
inadvertently
introduced
the
trailing
spaces
on
names.
A
Places
too
great
directory
is
the
only
one
that
actually
like
box
and
limits
ends
up
like
well.
Yeah,
actually,
like
does
a
recursive
creation
of
things
with
names
right,
so
that
will
everything
else,
because
we
trimmed
that
always
gets
trimmed
out.
The
file
name
right
windows
does
that
as
well,
the
spaces
get
trimmed
off
the
up
the
ending
file
name,
it's
only
in
the
case
of
the.
A
The
intern
interior
segments,
what
that'll,
let
you
do
too,
is
also
let
you
work
with
things
if
they
have
leaked
in
through
somebody
using
extended
syntax
somewhere
else
right.
So
if
you
get
that
base,
when
you
get
a
base
path,
no
longer,
will
we
munch
it
out
of
late
existence
because,
like
you
can
get
a
path
with
with
the
space
in
it,
and
it's
actually
valid
right
now
dying
that
falls
over
on
that.
B
You
know
many
leg,
but
its
entire
people
actually
rely
on
that
rely.
Much
like
remember
that
you
can,
in
a
certain
circumstances,
grateful
create
spaces
because
it
seems
like
more
like
yeah,
that's
the
behavior
we
have
today,
but
it
mostly
seems
like
box,
rather
than
things
that
actually
by
design.
Oh,
that.
A
They've
that
they've
come
into
the
system.
Yes,
and
that's
that's
exactly
why
I
want
to
like
encourage
not
using
the
the
extended
syntax
is
because
like
if
that's
the
answer,
to
get
too
long
paths
and
those
things
leaking
all
over
the
place.
And
then
it
becomes
a
big
issue
for
legacy
code,
because
you
can't
deal
with
these
things.
The
most
legacy
code.
Things
make
these
sort
of
assumptions
right
that
that
stuff
is
normalized
out
right,
the
trailing
periods
cetera
et
cetera.
A
So
your
your
code
may
work
with
a
max
path,
but
it
doesn't
work
with
trailing
spaces
and
the
like.
So
we
want
to
still
encourage,
like
formulating
paths
in
model
syntax,
so
you
know
want
the
extended
syntax
is
a
is
an
opt-in
really
and
normally
most
people
should
never
need
to
use
that
so,
and
this
is
actually
discussions
that
we're
having
internally
as
well
as
that,
like
from
a
of
solving
the
overall
problem
but
like
in
in
windows
and
like
that,
this
would
be
the
right
thing
to
do
from
a
compatibility
standpoint.
B
A
Is
which
is
arguably
the
more
likely
breaking
point
/
for
a
legacy
code,
because
again
we
talked
about
the
buffer
scenario,
so
it's
a
birth.
It's
like
well,
okay.
You
may
not
be
able
to
hit
that
long
path,
but
it's
worse
that
you
can't
hit
the
passer
under
match
path
for
your
legacy
code
and
that
that's
a
problem.
A
So
you
can
look
at
me
alive
enough
time
to
go
into
that,
so
I'm
gonna
get
to
the
the
extended
syntax,
which
is
the
next
part
of
that
right,
so
you're
you're,
looking
at
the
you
know
the
documentation
there
on
the
what
exactly
happens
with
this
nice
I've
written
a
few
hundred
tests
for
these
things
to
see
what
actually
happens
for
the
windows.
Api,
like
I,
mean
I've
being
internal
to
Microsoft.
Of
course,
I
can
look
at
the
windows
code
as
well,
so
I've
also
like
validated.
A
B
B
A
B
B
A
We
can't
your
butt
look
at
the
the
typing:
extensive
texts,
a
little
weirder
and
the
I
talked
about
already
and
saying
like
when
you
use
extended
sin
x
x.
Look
that's
the
contract
with
net
that,
like
you
say,
you
know
what
you're
doing
right
you've
already
resolved
as
we're
not
going
to
do
anything
with
it
because
they're
having
it
is
difficult
to
do,
but
you'll
get
significant
performance
improvements
from
that.
A
If
you're
like
doing
things
like
iterating
directories
and
stuff
like
that,
I
mean
we'll
try
to
do
that
internally
as
well
as
much
as
possible,
and
you
can
also
get
a
pass
that
we're
impossible
before
then
the
trailing
spaces
things
like
that
to
do
those
things,
particularly
if
your
file
intensive
that
allows
you
also
get
access
to
an
alternate
ultra.
The
alternate
streams
and
things
like
this
right,
some
of
the
more
obscure
dunnet
or
ntfs
stuff.
A
So
again
we
won't.
We
won't
try
to
call
get
full
pathname
will
not
check
invalid
characters,
collapse,
relative
segments
or
try
to
follow
into
alternate
short
path
names
for
extended
syntax.
When
you
call
the
overload
with
the
base
path,
we
won't
touch
the
base
path
other
than
we
still
consider
the
second
path
to
be
relative.
Assuming
it
is
relative
that
you
can
pass
in
a
fixed
path,
but
if,
like
you,
have
relative
segments
in
there,
they
eat
into
the
base
path.
A
A
That
means,
if
the
base
dad's
actually
had
relative
segments,
it
would
eat
those
up
and,
as
it
goes
worse
left
to
right
through
this
ring
in
this
case,
we'll
start
at
the
and
we'll
start
analyzing
the
relative
segments
ourselves
once
we
get
to
the
end
of
the
base
path,
so
we'll
look
for
the
segments
that
actually
have
the
current
in
the
parent
directory,
so
its
a
mix.
So
if
you
have
an
extended.
A
Will
be
no
canonicalization
of
it
other
that
just
the
relative
segments
will
be
removed,
so
unfortunately,
there's
no
really
great
answer
for
this
I
mean
it
is
possible
that
we
could
say,
because
you
don't
really
know
the
intense
right
and
so
for
sure,
so
I'm
going
to
say
that
the
intent
is
when
you
what
you
are
saying
when
you
pass
in
that?
That
thing
is
that
you're
saying
what
all
you
want
to
do
is
I
value
at
the
relative
segments.
A
B
Awkward
to
explain
so
the
only
dog
that
is
having
a
feud
the
directory
got
believe
they
actually
want
a
directory
structure
and
and
delete
files,
recursively
or
folders
record.
Rather
they
have.
They
have
an
example.
There
is
a
file
or
folder
before
training
space.
Then
there's
no
way
to
beat
your
combo
that
either
because
we
normalize
that
space
away
wouldn't
find
the
file.
Unless
you.
A
Use
the
directory
info
and
file
info
classes
so
we'll
make
sure
that
those
things
work.
That's
actually
we
want
to
encourage
their
navigator
with
those
work
because
they
they
start
there.
They
have
a
candle
to
the
path
right
and
there
they
really
that's.
You
have
a
file
name.
It
comes
back
from
windows
from
the
fine
file
and
you
actually
have
a
your
base
path
already.
So
we
already
know
what
the
real
path
is
and
like
directory.
Does
this
as
well
right?
You
delete
recursively,
she
said
it's
doing
fine
files
and
going
through
there.
A
A
That
is
the
path
you
know.
Windows
doesn't
lie
right,
so
I
mean
for
the
file
name.
So
we
will
keep
that
file
name
the
way
it
is.
We
won't
strip
that
off.
So
as
long
as
you
don't
go
out
to,
we
get
back
to
just
a
string
again:
you're,
fine,
right
and
calling
path
get
full
path.
So
if
you
get
the
full
path
out
and
then
called
elite
with
that
full
path,
then
it's
going
to
go
through
the
normal
path,
get
full
path
normalization.
A
B
C
B
A
C
A
A
failure-
no
not
really
other
than
the
like
I'm
deferring
to
the
windows
thing
going
to
do-
is
going
to
change
the
current
behavior.
But
when
you
still,
you
would
get
to
say
that
would
be
the
city
we
get
the
same
output.
Yes,
it
is
where
it
is
this.
It
is
really
just
the
same
as
calling
path
combined
yeah.
C
A
C
B
A
C
A
Again,
it's
like
it's
a
combination
of
two
api's.
Now,
if
we
change
the
behavior
of
combined,
then
yes,
we
could
potentially
do
it
and
we
actually
resolve
the
relative
segments
and
in
the
that
makes
it
hard
to
make
a
sort
of
a
foundational
statement.
I
mean
we
can
still
do
it.
We
could
say
like
great
with
extended
paths.
We
won't
touch
them
other
than
and
have
the
one
caveat.
But
I
want
to
be
very
careful
about
like
leaking
into
many
caveats
and
looking
to
your.
A
Accent
because,
like
if
you're
touching
that
you're
really
saying
you
know
what
you're
doing
dinette
stop
playing
with
it,
because
you're
breaking
right
and
that's
that's
kind
of
now,
Thank,
thankfully
on
the
eunuch
side
and
I,
even
talked
about
it.
Much
that
none
of
this
really
comes
into
play
because,
like
there
are
no
the
legacy
das
things
that
they
have
to
deal
with.
C
How
does
this
come
into
play
when
we
start,
we
started
actually
automatically
converting
normal
strings
without
the
extended
past,
the
long
pass
normal
strings
passing
able
to
get
full
bath,
and
then
how
are
we
still
going
to
clean
them
up
the
same
way?
So
you
have
a
path,
this
a
thousand
characters,
long
without
the
extended
path.
When
we
start,
naturally
just
accepting
long
past,
even
on
wonders,
you're
gonna
go
behind
the
scenes.
You
have
to
convert
that
to
extended
paths.
Somehow
no.
A
C
A
It's
a
very
simple
string,
processing
routine.
It
did
well
it's
a
complicated
spring
processing.
It
is
just
a
string
process
area.
He
does
some
other
things
that,
like
I'm
sure
people
were
busted
over
like
it
looks
at
Khan
and
turns
it
in
a
backside.
Backshots
period
backslash
con.
You
know
this
is
Italy.
C
Not
so
I
mean
I
was
always
thinking
of
extended
sin
taxes,
always
one-to-one
relation
with
long
paths
and
we'd
be
treating
them
the
same.
Behavior
we
need
to
think
about
extended
path
is
something
else
is
like
this
is
like
a
path:
I,
don't
want
you
to
manipulate,
then
that's
a
different
question.
Yeah.
B
A
I
actually
thought
about
that
this
morning
and,
like
I,
think
we
should
think
about
that
and,
like
CFS
really
has
any
value,
you
know
the
again
on
the
unix
world.
I'm
not
so
sure
that
that's
as
useful
the
windows
scenario
for
like
ntfs
paths
in
the
leg
is
just
so
complicated
and
wacky
that,
like
in
the
legacy
behavior
versus,
what's
actually
possible
to
do,
are
so
diverse
and
broken
and
like
weekly.
A
A
C
A
A
A
Sir
pulling
in
those
other
api's
that
I
talked
it
out
in
the
last
talk
as
well.
It'll
be
a
few
weeks
before
we
see
another
one
of
those
the.net
implementation
for
at
least
the
basic
support
for
extended
syntax
is
already
in
there.
It
was
part
of
beta
seven,
hopefully
in
beta,
will
have
the
implicit
and
probably
won't
have
this
API
in
place
by
the
by
the
time
of
beta.
Eight
rolls
around,
but
that's
that's
the
expectation,
so
I
would
have
some
one
another.