I use Pascal as a programming language, and compile with fpc. Everything works fine when both the program and the files it needs to access are on a linux partition, but on a windows one, I get the permission denied error (even if i am logged as root).Permisions are set for read/write/execute for both root and user group (the file is -rwxrwxr-x) just like it is on linux partitions.
Is this simply not supported by Linux or do I need to do something else?

to my knowledge, fat32 systems do not support permissions at all.

true, all fat partitions have no permisions settings.

the classical way to set a storage volume to be shared between win and linux have been fat32 systems. But this solution has two drawbacks: the permission thing and the problem with large files. fat32 can't store files > 2GB.

fat32 cannot store files bigger than 4GB.... maybe 2GB is fat16

Also as for your permissions, have you tried mounting the partition with the umask=000 option that'll give the files 777 permissions (no good chmod'ing anything, because as stated, the files cannot have unix-like permissions).

What if you try and write files to it, does it allow it?

Thanks for all the quick replies.

Yes, I can read/write to it. Yes, I can do everything I want with that partition except for this tiny problem.

The partition is mounted with umask=002 (0775 permissions). Theoretically, if it were to work, it should work for any root/user run program that tries to read/write from/to a file there. I will experiment more, doing also what you suggested. Maybe the simplest solution would be reformatting it in a linux partition, I don't use windows much anyway...

Anyway, I got it with the permissions now - not for windows partitions. Thanks again and sorry for my noob question.