chore(scripts): when running in non-interactive mode, do not enable neither start any driver.

Eg: when building Falco docker image, and installing Falco package, we don't want it to build any driver.

Signed-off-by: Federico Di Pierro <nierro92@gmail.com>

scripts/debian/postinst.in

@@ -17,13 +17,13 @@
 #
 set -e
 
-chosen_driver="kmod"
+chosen_driver=
 
-if [ -z "$PS1" ]; then
-  echo "Skipping driver selection in non-interactive mode"
-else
 case "$1" in
     configure)
+        if [ ! -t 0 ] ; then
+          echo "Skipping driver selection in non-interactive mode"
+        else
           if [ -x /usr/bin/dialog ]; then
             CHOICE=$(dialog --clear --backtitle "Choose your preferred driver" --title "Falco driver" --menu "Choose one of the following options:" 15 40 4 \
                   1 "Kmod" \
@@ -42,10 +42,12 @@ else
                       chosen_driver=
                       ;;
               esac
+          else
+            chosen_driver="kmod"
+          fi
         fi
     ;;
 esac
-fi
 
 case "$chosen_driver" in
     "kmod")

scripts/rpm/postinstall.in

@@ -16,9 +16,11 @@
 #
 set -e
 
-chosen_driver="kmod"
+chosen_driver=
 
-if [ -z "$PS1" ]; then
+case "$1" in
+    configure)
+         if [ ! -t 0 ] ; then
           echo "Skipping driver selection in non-interactive mode"
         else
           if [ -x /usr/bin/dialog ]; then
@@ -39,8 +41,12 @@ else
                       chosen_driver=
                       ;;
               esac
+          else
+            chosen_driver="kmod"
           fi
         fi
+    ;;
+esac
 
 case "$chosen_driver" in
     "kmod")