update-me: "mount -o remount,rw /boot" if necessarry (and as root)

1 files changed, 17 insertions, 2 deletions

diff --git a/update-me.in b/update-me.in
index 449d7b9..0b4c48d 100644
--- a/update-me.in
+++ b/update-me.in
@@ -4,6 +4,15 @@ preCmds=('hostname')
 cmds=()
 postCmds=('sync')
 
+if mountpoint -q /boot \
+&& mount \
+  | grep -wF '/boot' \
+  | cut -d' ' -f6 \
+  | grep -qwF 'ro'; then
+  preCmds+=('mount -o remount,rw /boot')
+  postCmds+=('mount -o remount,ro /boot')
+fi
+
 if command -v check-kernel >/dev/null; then
   postCmds+=('check-kernel -r')
 fi
@@ -12,9 +21,15 @@ fi
 
 if "${hasSudo}" && \
   command -v sudo >/dev/null; then
+  for ((i=0; i<${#preCmds[@]}; i++)); do
+    if [ -z "${preCmds[${i}]%%mount*}" ]; then
+      preCmds[${i}]='sudo '"${preCmds[${i}]}";
+    fi
+  done
   for ((i=0; i<${#postCmds[@]}; i++)); do
-    if [ "${postCmds[${i}]}" = 'check-kernel -r' ]; then
-      postCmds[${i}]='sudo check-kernel -r';
+    if [ "${postCmds[${i}]}" = 'check-kernel -r' ] \
+    || [ -z "${postCmds[${i}]%%mount*}" ]; then
+      postCmds[${i}]='sudo '"${postCmds[${i}]}";
     fi
   done
 fi