funtions: add umount_force function

common.d/build_functions.sh

@@ -108,9 +108,9 @@ umount_image()
     cp ./drop/postinstall "$rootdir/opt/nabu/postinstall"
     chmod +x "$rootdir/opt/nabu/postinstall"
 
-    umount "$rootdir/boot/efi"
-    umount "$rootdir/boot/simpleinit"
-    umount "$rootdir"
+    umount_force "$rootdir/boot/efi"
+    umount_force "$rootdir/boot/simpleinit"
+    umount_force "$rootdir"
     rm -d "$rootdir"
     return 0
 }
@@ -144,11 +144,11 @@ detach_chroot()
 
     rootdir=$(realpath "$1")
     killall gpg-agent > /dev/null 2>&1
-    umount "$rootdir/proc" > /dev/null 2>&1 
-    umount "$rootdir/sys" > /dev/null 2>&1
-    umount "$rootdir/dev/pts" > /dev/null 2>&1
-    umount "$rootdir/dev/shm" > /dev/null 2>&1
-    umount "$rootdir/dev" > /dev/null 2>&1
+    umount_force "$rootdir/proc" > /dev/null 2>&1 
+    umount_force "$rootdir/sys" > /dev/null 2>&1
+    umount_force "$rootdir/dev/pts" > /dev/null 2>&1
+    umount_force "$rootdir/dev/shm" > /dev/null 2>&1
+    umount_force "$rootdir/dev" > /dev/null 2>&1
     return 0
 }
 

common.d/functions.sh

@@ -23,6 +23,27 @@ mkdir_if_not_exists ()
    mkdir "$1"
 }
 
+umount_if_mouted()
+{   
+    [ ! -d "$1" ] && return 0
+    if grep -qs "$(realpath "$1")" /proc/mounts; then
+        umount "$1"
+        return $?
+    else
+        return 0
+    fi
+}
+
+umount_force()
+{
+    [ ! -d "$1" ] && return 0
+    while true; do
+        umount_if_mouted "$1" && break 
+        log "Failed to umount $1. Trying again after 3 seconds" ierror
+        sleep 3
+    done
+}
+
 prepare_env()
 {
     mkdir_if_not_exists "./cache"