Check for empty string

docs/Y42.tex

@@ -72,17 +72,10 @@ This is my \ \ \ \ \answerbox{0.1} first \ \ \ \ \answerbox{0.1} second \ \ \ \
 I know \ \ \ \answerbox{0.1} nothing \ \ \ \answerbox{0.1} somewhat \ \ \ \answerbox{0.1} the secret \ \ \ \ about the Chaos.
 \\
 
-\section*{Application for registering my GPG fingerprint - Optional}
-I hereby applicate to register my GPG fingerprint. 
-I have either
+\section*{Additional hints}
 \begin{itemize}
-\item[1.] uploaded the public key to the \textbf{keys.openpgp.org} keyserver \textbf{using the following mail address} or
-\item[2.] I can state the \textbf{full GPG fingerprint}, which is
+\item To register your \textbf{GPG fingerprint} on your passport, please fill out \textbf{Form PKSR20}.
 \end{itemize}
-\
-Mail address or full GPG fingerprint in the form of 1234-ABCD-5678-9012-1234-1234-1234-1234-1234
-\\
-\answerbox{6.5}
 
 \end{document}
 

start

@@ -101,7 +101,11 @@ function gpgSearch() {
       if [ $? -eq 0 ]; then
         export FFP=$(gpg -k "$(cat $TMP)" | head -n 2 | tail -n 1 | awk '{print $1}' | sed 's/.\{4\}/& /g;s/^\(.*\) $/\1/g')
         gpg --batch --delete-key "$FFP"
-        return 0
+        if [ "$FFP" = "" ]; then
+          gpgSearch
+        else
+          return 0
+        fi
       else
         gpgSearch
       fi

start_dialog

@@ -135,7 +135,11 @@ function gpgSearch() {
       if [ $? -eq 0 ]; then
         export FFP=$(gpg -k "$(cat $TMP)" | head -n 2 | tail -n 1 | awk '{print $1}' | sed 's/.\{4\}/& /g;s/^\(.*\) $/\1/g')
         gpg --batch --delete-key "$FFP"
-        return 0
+        if [ "$FFP" = "" ]; then
+          gpgSearch
+        else
+          return 0
+        fi
       else
         gpgSearch
       fi