Very Computer

I am looking for a function that will allow me to map the contents
of a file directly in memory.

This will avoid me having to open...read the stuff in.

I believe that Sun had some sort of function to do it. ??

(this will typically be a vendor supplied function...
 I can hack it if I want to )

I am working with hp-9000.... kit
I have scoured the documentation, maybe in my frustration I overlooked
it ?

suggestions ( no smart one - heard them before ) are welcome

Thanks

Glenn Stevenson

Try man 2 mmap. Even HP-UX has it.

--

Michael Salmon

#include        <standard.disclaimer>
#include        <witty.saying>
#include        <fancy.pseudo.graphics>

Ericsson Telecom AB
Stockholm

Quote:> Try man 2 mmap. Even HP-UX has it.

also, note that conservative use of mmap is now "defacto portable",
since hpux, sunos, irix, osf, and linux all support it.  probably
aix as well.

regards, mark hahn.
--

I always find it interesting to hear that hp has done something better,
how have they improved mmap(2).

--

Michael Salmon

#include        <standard.disclaimer>
#include        <witty.saying>
#include        <fancy.pseudo.graphics>

Ericsson Telecom AB
Stockholm

Quote:> in fact, hp-ux's (>= 9.01) [mmap] is superior to the version in sunos (4.x).

I've made overlapping mappings in SVR4 and SunOS 4.1.1 without having
to specify any special flags and without any problems.

--

Michael Salmon

#include        <standard.disclaimer>
#include        <witty.saying>
#include        <fancy.pseudo.graphics>

Ericsson Telecom AB
Stockholm

Quote:> > It *was* superior.  In HP-UX 8.x, you could specify the flag argument
> > MAP_REPLACE to establish a mapping that overlaps an already existing
> > mapping.  HP seems to have removed this functionality in HP-UX 9.0.
> > Has MAP_REPLACE been reintroduced in HP-UX 9.01?

> I've made overlapping mappings in SVR4 and SunOS 4.1.1 without having
> to specify any special flags and without any problems.

In HP-UX 09.05 (which is the most recent release we have), regions
must not overlap, and the MAP_REPLACE flag is gone (which is a pity,
because it breaks an application I have that requires that mappings
may overlap).

Casper

Quote:> > Well, then it was at least superior insofar as you could control whether
> > or not regions should be permitted to overlap.

> Mapping do not overlap in SunOS/Solaris.  Newer mappings simply
> replace older mappings.

: I am looking for a function that will allow me to map the contents
: of a file directly in memory.

        Lookup mmap(2)/munmap(2) in the manuals (System V)

Manfred