[GRASS-user] Cannot use grass on vfat partition

[Agustin Lobo]

Just found the difference between locations on
the vfat and on the ext3 partition:
mapsets on the vfat partition get
files  MYNAME  WIND as myname and wind.

Just renaming these files makes everything work.

What I do not understand is why grass
writes thes files in lower case, it does not
with LOCATION for example, and even less
why grass has a different behaviour
for different partition formats

Note that in both cases I'm using linux (Ubuntu 8.04)
and grass6.2.3

Thanks

Agus

Agustin Lobo wrote:
> Glynn,
> 
> Unfortunately, this is not the case. Directory
> drwxrwxrwx /media/mifat32/test/PERMANENT
> is in upper case, with its
> DEFAULT_WIND  myname  wind files
> all of them with -rwxrwxrwx permissions.
> 
> If I start
> grass -text
> on /media/mifat32
> I enter a normal grass session (although g.mapset does not work!)
> 
> But if I do
> grass -gui
> I get the gui with
> GIS data directory: /media/mifat32
> Project Location: test
> Mapset: testmapset
> 
> and when  I select Enter GRASS, I get an error:
> Warning Invalid Mapset
> Warning <0> is not a valid mapset.
> 
> Also, if within the grass text session I do:
>  g.mapset /media/mifat32/test/testmapset
> I get:
> ERROR: The mapset does not exist.
> 
> even if I do it from within the
> /media/mifat32/test/testmapset directory!
> 
> This is so confusing...
> 
> Agus
> 
> 
> Glynn Clements wrote:
>> Agustin Lobo wrote:
>>
>>> I'm using grass 6.2.3 on ubuntu 7.1
>>> I've set up a fat32 partition so that I can share data with windows.
>>> The line in my fstab is:
>>> /dev/sda4       /media/mifat32  vfat 
>>> auto,rw,gid=1000,uid=1000,iocharset=utf8,umask=0000 0 0
>>>
>>> I mount with no problems, files belong to user alobo group alobo, I
>>> can write,delete and make directories.
>>>
>>> When I try to create a LOCATION and a mapset, I get errors. For
>>> example, cannot do it with
>>> the graphic interface, if I select Create mapset, I get:
>>>
>>> couldn't change working directory to "##ERROR##": no such file or 
>>> directory
>>> couldn't change working directory to "##ERROR##": no such file or 
>>> directory
>>>     while executing
>>> "cd $location"
>>>     invoked from within
>>> ".frame0.frameNMS.third.button invoke"
>>>     ("uplevel" body line 1)
>>>     invoked from within
>>> "uplevel #0 [list $w invoke]"
>>>     (procedure "tk::ButtonUp" line 22)
>>>     invoked from within
>>> "tk::ButtonUp .frame0.frameNMS.third.button"
>>>     (command bound to event)
>>
>> Just a guess, but is the PERMANENT directory in upper or lower case?
>>
>> If Linux has decided to convert it to lower case, the CheckLocation
>> procedure in gis_set.tcl won't find it.
>>
>> FWIW (CC to grass-dev), checking for PERMANENT like this:
>>
>>         foreach filename [lsort [glob -nocomplain *]] {
>>             if {[string compare $filename "PERMANENT"] == 0} {
>>         ...
>>             }
>>         }
>>
>> is bogus. It should be:
>>
>>     if {[file isdirectory "PERMANENT"]} {
>>         ...
>>     }
>>
>> The latter will correctly handle a filesystem which isn't
>> case-sensitive.
>>
>> It should also handle the case where you don't have read permission on
>> the location directory. Enumeration requires read permission, while
>> lookup only requires execute permission. You shouldn't actually need
>> read permission for anything other than "g.mapsets -l".
>>
>>> I can do it with the console (Projection Values), but then, at the end,
>>> the graphic interface quits and I get:
>>>
>>> GRASS 6.2.3 (delmedir):/media/mifat32 > ERROR: default region is not set
>>
>> This might be related; if it's looking for PERMANENT/DEFAULT_WIND
>> using enumeration and comparison (as above), it will fail if the case
>> is wrong.
>>
> 

-- 
Dr. Agustin Lobo
Institut de Ciencies de la Terra "Jaume Almera" (CSIC)
LLuis Sole Sabaris s/n
08028 Barcelona
Spain
Tel. 34 934095410
Fax. 34 934110012
email: Agustin.Lobo at ija.csic.es
http://www.ija.csic.es/gt/obster