... OK, found the solution.
It is not a temp directory problem.
It is just a gpg problem.
On this NAS server, I installed with ipkg duplicity, gpg2, import my keys, trust to ultimate, and so on...
Guess what : gpg2. (not the gpg command)
just make a link between gpg2 and gpg !!!
In my case :
# cd /opt/bin
# ln -s /opt/bin/gpg2 gpg
problem solved, but not obvious. the -v9 trace leads to tempdir failure !
... OK, found the solution.
It is not a temp directory problem.
It is just a gpg problem.
On this NAS server, I installed with ipkg duplicity, gpg2, import my keys, trust to ultimate, and so on...
Guess what : gpg2. (not the gpg command)
just make a link between gpg2 and gpg !!!
In my case :
# cd /opt/bin
# ln -s /opt/bin/gpg2 gpg
problem solved, but not obvious. the -v9 trace leads to tempdir failure !