[maemo-developers] Howto correctly place data on the memory card?

[From: Kimmo Hämäläinen]

On Sun, 2009-06-21 at 21:09 +0200, ext Till Harbaum / Lists wrote:
> Hi,
> 
> i several of my projects i face the same problem: How do i correctly add
> bulk data on the internal memory card?
> 
> Up to stock diablo everything was simple: The entire card was mounted 
> as vfat on /media/mmc2 and my applications moved their data there (e.g. /media/mmc2/osm2go).
> 
> But with the arrival of fremantle things have changed. The card now seems
> to be mounted with ext3 on /home/user and a bigger partition with vfat
> under /home/user/MyDocs. Now i have a bunch of problems:
> 
> - How do i correctly figure out i am compiling for fremantle?
>   I am currently using "pkg-config --modversion maemo-version" and parse
>   the result in configure. This seems to be pretty stable and useful. Ok?
> 
> - How do i correctly figure out i am running on fremantle?
>   My currently solution is to check the environment variable
>   "OSSO_PRODUCT_RELEASE_NAME" which is "Maemo 5" for fremantle.
>   Is this ok? How do i deal with the scratchbox? It doesn't seem to set
>   this variable at all.

Yeah, using osso-product-info is the right way.  I don't have any idea
about Scratchbox, maybe a bug should be reported against the Fremantle
SDK.

> - How do i correctly find the big vfat partition in fremantle? It seems to
>   be mounted under /home/user/MyDocs. Unfortunately that place doesn't
>   even exist in scratchbox (unless you user name there is "user"). So
>   how do i know i am running in scratchbox and need to /home/user? 
>   Using $HOME seems critial in e.g. postinst as the installation my be
>   run by the root user.

Use MMC_MOUNTPOINT and INTERNAL_MMC_MOUNTPOINT environment variables,
available since Nokia 770 Internet Tablet.  I'm not sure about
Scratchbox, since it does not have memory card emulation.

-Kimmo

> 
> So the question basically is: How does the build environment find the path
> to the big vfat memcard location and how does e.g. a postinst script
> find the same location at installation time?
> 
> Till
> 
>  
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