feat: Check RENDERNODE permissions (#1279)

src/display.sh

@@ -48,6 +48,10 @@ if [ ! -c "$RENDERNODE" ]; then
   fi
 fi
 
+if [ ! -c "$RENDERNODE" ] || [ ! -r "$RENDERNODE" ] || [ ! -w "$RENDERNODE" ]; then
+  warn "render device '$RENDERNODE' is unavailable or inaccessible."
+fi
+
 addPackage "xserver-xorg-video-intel" "Intel GPU drivers"
 addPackage "qemu-system-modules-opengl" "OpenGL module"
 

src/network.sh

@@ -1861,7 +1861,9 @@ showHostInfo() {
   [ ! -f "$file" ] && file="/etc/resolv.conf"
 
   if [ -f "$file" ]; then
-    nameservers=$(grep '^nameserver ' "$file" | sed 's/^nameserver //' | paste -sd ',' | sed 's/,/, /g')
+    nameservers=$(awk '$1 == "nameserver" { print $2 }' "$file" |
+      paste -sd ',' |
+      sed 's/,/, /g' || true)
   fi
 
   [ -z "$nameservers" ] && nameservers="(none)"

src/reset.sh

@@ -320,9 +320,8 @@ FOOTER2="<a href='$SUPPORT'>$SUPPORT</a>"
 SOCKETS=1
 CPU=$(cpu)
 SYS=$(uname -r)
-KERNEL=$(echo "$SYS" | cut -b 1)
-MINOR=$(echo "$SYS" | cut -d '.' -f2)
 ARCH=$(dpkg --print-architecture)
+IFS=. read -r KERNEL MINOR _ <<< "$SYS"
 CORES=$(grep -c '^processor' /proc/cpuinfo)
 
 if grep -qi "socket(s)" <<< "$(lscpu)"; then