PariDroid questions

[hermann@stamm-wilbrandt.de]

Some questions regarding readvec() and current directory for PariDroid.

I did store
https://github.com/Hermann-SW/RSA_numbers_factored/blob/main/pari/RSA_numbers_factored.gp
in DroidVim home directory.

Then I am able to use Menu->Read to read that file into PariDroid and 
then run eg. "RSA.validate()".

One question is, which is the current directory of PariDroid on start?
Or where I would need to store RSA_numbers_factored.gp on smartphone so 
that
I can do readvec("RSA_numbers_factored.gp") in PariDroid?

On Linux I would store RSA_numbers_factored.gp in the directory I 
started "gp".

I found "system()" in GP user guide.
But system("pwd") returns 0, while system("ls") returns 1 in PariDroid.
No directory listing for "ls".

I ask because my GP scripts using RSA_numbers_factored.gp just do
readvec("RSA_numbers_factored.gp") as first command.
And I would like to work with unchanged scripts in PariDroid and Linux.

Regards,

Hermann.

P.S:

While PyDroid 3 has an editor integrated, not much is missing for 
PariDroid.
I just switch to DroidVim, do changes there, store and then switch back 
to PariDroid
for working with the changed file via Menu->Read.