Use homedir for gpg export and import

src/freedombone-keydrive

   export GPG_TTY
 
   USER_EMAIL_ADDRESS=$MY_USERNAME@$HOSTNAME
-  GPG_ID=$(gpg --list-keys $USER_EMAIL_ADDRESS | sed -n '2p' | sed 's/^[ \t]*//')
-  GPG_BACKUP_ID=$(gpg --list-keys "(backup key)" | sed -n '2p' | sed 's/^[ \t]*//')
+  GPG_ID=$(su -m root -c "gpg --list-keys $USER_EMAIL_ADDRESS | sed -n '2p' | sed 's/^[ \t]*//'" - $MY_USERNAME)
+  GPG_BACKUP_ID=$(su -m root -c "gpg --list-keys \"(backup key)\" | sed -n '2p' | sed 's/^[ \t]*//'" - $MY_USERNAME)
 
   gpgerrstr=$'error'
-  gpgkey=$(gpg --armor --export $GPG_ID)
+  gpgkey=$(gpg --homedir=/home/$MY_USERNAME/.gnupg --armor --export $GPG_ID)
   if [[ "$gpgkey" == *"$gpgerrstr"* ]]; then
       echo $'Problem exporting public gpg key'
       echo "$gpgkey"
       exit 735282
   fi
-  gpgprivkey=$(gpg --armor --export-secret-key $GPG_ID)
+  gpgprivkey=$(gpg --homedir=/home/$MY_USERNAME/.gnupg --armor --export-secret-key $GPG_ID)
   if [[ "$gpgprivkey" == *"$gpgerrstr"* ]]; then
       echo $'Problem exporting private gpg key'
       echo "$gpgprivkey"
       exit 629362
   fi
 
-  backupgpgkey=$(gpg --armor --export $GPG_BACKUP_ID)
+  backupgpgkey=$(gpg --homedir=/home/$MY_USERNAME/.gnupg --armor --export $GPG_BACKUP_ID)
   if [[ "$backupgpgkey" == *"$gpgerrstr"* ]]; then
       echo $'Problem exporting public gpg backup key'
       echo "$backupgpgkey"
       exit 735282
   fi
-  backupgpgprivkey=$(gpg --armor --export-secret-key $GPG_BACKUP_ID)
+  backupgpgprivkey=$(gpg --homedir=/home/$MY_USERNAME/.gnupg --armor --export-secret-key $GPG_BACKUP_ID)
   if [[ "$backupgpgprivkey" == *"$gpgerrstr"* ]]; then
       echo $'Problem exporting private gpg backup key'
       echo "$backupgpgprivkey"
-      gpgprivkey=
+      backupgpgprivkey=
       exit 629362
   fi
 

src/freedombone-recoverkey

 echo $'Key fragments recombined'
 
 # import the gpg key
-su -c "gpg --allow-secret-key-import --import $KEYS_FILE" - $MY_USERNAME
+gpg --homedir=/home/$MY_USERNAME/.gnupg --allow-secret-key-import --import $KEYS_FILE
 if [ ! "$?" = "0" ]; then
     echo $'Unable to import gpg key'
     shred -zu $KEYS_FILE