First try to index PDF with pdftotext, and fallback to gs if pdftotext cannot extract any usefull information

root/usr/bin/ajxppdftotext

@@ -1,2 +1,6 @@
 #!/bin/bash
-gs -q -dNODISPLAY -dSAFER -dDELAYBIND -dWRITESYSTEMDICT -dSIMPLE -c save -f ps2ascii.ps $1 -c quit 2>/dev/null
+RES=$(/usr/bin/pdftotext -eol unix -layout -nopgbrk "$1" -)
+if [ -z "$RES" ]; then
+    RES=$(/usr/bin/gs -q -P- -dNODISPLAY -dSAFER -dDELAYBIND -dWRITESYSTEMDICT -dSIMPLE -f ps2ascii.ps "$1" -c quit 2>/dev/null | iconv -f ISO8859-1 -t UTF-8)
+fi
+echo "$RES"