fix #285 (#287 )

fix #278
Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>
2026-03-04 21:15:02 +08:00 · 2023-06-05 08:55:44 +02:00 · 2023-04-28 18:26:25 +02:00 · 2023-04-13 10:54:03 +02:00 · 2023-04-13 10:52:24 +02:00 · 2023-04-11 08:52:34 +02:00
15 changed files with 915 additions and 442 deletions
--- a/53
+++ b/53
@@ -20,14 +20,16 @@
 # - Automatically generate grub.cfg if you use the provided systemd service.
 #
 # Installation:
-# - Refer to https://github.com/Antynea/grub-btrfs#installation-
+# - Refer to https://github.com/Antynea/grub-btrfs#%EF%B8%8F-installation
 #
 # Customization:
 #  You have the possibility to modify many parameters in /etc/default/grub-btrfs/config.
+#  Read more here https://github.com/Antynea/grub-btrfs#installation- an in the manpage
+#  'man grub-btrfs'
 #
 # Automatically update Grub
 #  If you would like grub-btrfs menu to automatically update when a snapshot is created or deleted:
-#  - Refer to https://github.com/Antynea/grub-btrfs#automatically-update-grub.
+#  - Refer to https://github.com/Antynea/grub-btrfs#-automatically-update-grub-upon-snapshot.
 #
 # Special thanks for assistance and contributions:
 # - My friends
@@ -76,7 +78,7 @@ done
 [[ "${GRUB_BTRFS_DISABLE,,}" == "true" ]] && print_error "GRUB_BTRFS_DISABLE is set to true (default=false)"
 if ! type btrfs >/dev/null 2>&1; then print_error "btrfs-progs isn't installed"; fi
 [[ -f "${GRUB_BTRFS_MKCONFIG_LIB:-/usr/share/grub/grub-mkconfig_lib}" ]] && . "${GRUB_BTRFS_MKCONFIG_LIB:-/usr/share/grub/grub-mkconfig_lib}" || print_error "grub-mkconfig_lib couldn't be found"
-[[ "$(${grub_probe} --target="fs" / 2>/dev/null)" != "btrfs" ]] && print_error "Root filesystem isn't btrfs"
+[[ "$(btrfs filesystem df / 2>&1)" == *"not a btrfs filesystem"* ]] && print_error "Root filesystem isn't btrfs"

 printf "Detecting snapshots ...\n" >&2 ;

@@ -92,7 +94,7 @@ grub_directory=${GRUB_BTRFS_GRUB_DIRNAME:-"/boot/grub"}
 ## Customize BOOT directory, where kernels/initrams/microcode is saved.
 boot_directory=${GRUB_BTRFS_BOOT_DIRNAME:-"/boot"}
 ## Customize GRUB-BTRFS.cfg directory, where "grub-btrfs.cfg" file is saved
-grub_btrfs_directory=${GRUB_BTRFS_GBTRFS_DIRNAME:-"/boot/grub"}
+grub_btrfs_directory=${GRUB_BTRFS_GBTRFS_DIRNAME:-${grub_directory}}
 ## Customize directory where "grub-btrfs.cfg" file is searched for by grub
 grub_btrfs_search_directory=${GRUB_BTRFS_GBTRFS_SEARCH_DIRNAME:-"\${prefix}"}
 ## Password protection management for submenu
@@ -121,7 +123,7 @@ boot_hs=$(${grub_probe} --device ${boot_device} --target="hints_string" 2>/dev/n
 boot_fs=$(${grub_probe} --device ${boot_device} --target="fs" 2>/dev/null) # Type filesystem of boot device

 ## Parameters passed to the kernel
-kernel_parameters="$GRUB_CMDLINE_LINUX $GRUB_CMDLINE_LINUX_DEFAULT"
+kernel_parameters="$GRUB_CMDLINE_LINUX $GRUB_CMDLINE_LINUX_DEFAULT $GRUB_BTRFS_SNAPSHOT_KERNEL_PARAMETERS"
 ## Mount point location
 grub_btrfs_mount_point=$(mktemp -dt grub-btrfs.XXXXXXXXXX)
 ## Class for theme
@@ -130,7 +132,7 @@ CLASS="--class snapshots --class gnu-linux --class gnu --class os"
 oldIFS=$IFS
 ## Detect uuid requirement (lvm,btrfs...)
 check_uuid_required() {
-if [ "x${root_uuid}" = "x" ] || [ "x${GRUB_DISABLE_LINUX_UUID}" = "xtrue" ] \
+if [ "${root_uuid}" = "" ] || [ "${GRUB_DISABLE_LINUX_UUID}" = "true" ] \
    || ! test -e "/dev/disk/by-uuid/${root_uuid}" \
    || ( test -e "${root_device}" && uses_abstraction "${root_device}" lvm ); then
    LINUX_ROOT_DEVICE=${root_device}
@@ -295,7 +297,7 @@ snapshot_list()
    IFS=$'\n'
    for snap in $(btrfs subvolume list -sa "${btrfs_subvolume_sort}" /); do # Parse btrfs snapshots
        IFS=$oldIFS
-        snap=($snap)
+        snap=(${snap})
        local path_snapshot=${snap[@]:13:${#snap[@]}}
        if [ "$path_snapshot" = "DELETED" ]; then continue; fi # Discard deleted snapshots
        [[ ${path_snapshot%%"/"*} == "<FS_TREE>" ]] && path_snapshot=${path_snapshot#*"/"} # Remove the "<FS_TREE>" string at the beginning of the path
@@ -566,10 +568,14 @@ boot_separate()
 }

 rm -f "$grub_btrfs_directory/grub-btrfs.new"
-> "$grub_btrfs_directory/grub-btrfs.new" # Create a "grub-btrfs.new" file in "grub_btrfs_directory"
+true > "$grub_btrfs_directory/grub-btrfs.new" # Create a "grub-btrfs.new" file in "grub_btrfs_directory"
+# Create a backup of the "$grub_btrfs_directory/grub-btrfs.cfg" file if exist
+if [ -e "$grub_btrfs_directory/grub-btrfs.cfg" ]; then
+	mv -f "$grub_btrfs_directory/grub-btrfs.cfg" "$grub_btrfs_directory/grub-btrfs.cfg.bkp"
+fi
 # Create mount point then mounting
 [[ ! -d $grub_btrfs_mount_point ]] && mkdir -p "$grub_btrfs_mount_point"
-mount -o ro,subvolid=5 /dev/disk/by-uuid/"$root_uuid" "$grub_btrfs_mount_point/"
+mount -o ro,subvolid=5 /dev/disk/by-uuid/"$root_uuid" "$grub_btrfs_mount_point/" > /dev/null
 trap "unmount_grub_btrfs_mount_point" EXIT # unmounting mount point on EXIT signal
 count_warning_menuentries=0 # Count menuentries
 count_limit_snap=0 # Count snapshots
@@ -577,30 +583,39 @@ check_uuid_required
 # Detects if /boot is a separate partition
 [[ "${GRUB_BTRFS_OVERRIDE_BOOT_PARTITION_DETECTION,,}" == "true" ]] && printf "Override boot partition detection : enable \n" >&2 && boot_separate;
 if [[ "$root_uuid" != "$boot_uuid" ]] || [[ "$root_uuid_subvolume" != "$boot_uuid_subvolume" ]]; then boot_separate ; else boot_bounded ; fi
+# Make a submenu in GRUB (grub.cfg)
+cat << EOF
+if [ ! -e "${grub_btrfs_search_directory}/grub-btrfs.cfg" ]; then
+echo ""
+else
+submenu '${submenuname}' ${protection_authorized_users}${unrestricted_access_submenu}{
+    configfile "${grub_btrfs_search_directory}/grub-btrfs.cfg"
+}
+fi
+EOF
 # Show warn, menuentries exceeds 250 entries
 [[ $count_warning_menuentries -ge 250 ]] && printf "Generated %s total GRUB entries. You might experience issues loading snapshots menu in GRUB.\n" "${count_warning_menuentries}" >&2 ;
 # Show total found snapshots
 if [[ "${GRUB_BTRFS_SHOW_TOTAL_SNAPSHOTS_FOUND:-"true"}" = "true" && -n "${count_limit_snap}" && "${count_limit_snap}" != "0" ]]; then
    printf "Found %s snapshot(s)\n" "${count_limit_snap}" >&2 ;
 fi
-# if no snapshot found, exit
+# if no snapshot found, delete the "$grub_btrfs_directory/grub-btrfs.new" file and the "$grub_btrfs_directory/grub-btrfs.cfg.bkp" file and exit
 if [[ "${count_limit_snap}" = "0" || -z "${count_limit_snap}" ]]; then
+    rm -f "$grub_btrfs_directory/grub-btrfs.new" "$grub_btrfs_directory/grub-btrfs.cfg.bkp"
    print_error "No snapshots found."
 fi
-# Make a submenu in GRUB (grub.cfg) and move "grub-btrfs.new" to "grub-btrfs.cfg"
+# Move "grub-btrfs.new" to "grub-btrfs.cfg"
 header_menu
 if "${bindir}/${GRUB_BTRFS_SCRIPT_CHECK:-grub-script-check}" "$grub_btrfs_directory/grub-btrfs.new"; then
    cat "$grub_btrfs_directory/grub-btrfs.new" > "$grub_btrfs_directory/grub-btrfs.cfg"
-    rm -f "$grub_btrfs_directory/grub-btrfs.new"
-    cat << EOF
-submenu '${submenuname}' ${protection_authorized_users}${unrestricted_access_submenu}{
-    configfile "${grub_btrfs_search_directory}/grub-btrfs.cfg"
-}
-EOF
+    rm -f "$grub_btrfs_directory/grub-btrfs.new" "$grub_btrfs_directory/grub-btrfs.cfg.bkp"
 else
-    print_error "Syntax errors were detected in generated ${grub_btrfs_directory}/grub-btrfs.new file. Old grub-btrfs.cfg (if present) was not replaced."
+if [ -e "$grub_btrfs_directory/grub-btrfs.cfg.bkp" ]; then
+        mv -f "$grub_btrfs_directory/grub-btrfs.cfg.bkp" "$grub_btrfs_directory/grub-btrfs.cfg"
+fi
+	print_error "Syntax errors were detected in generated ${grub_btrfs_directory}/grub-btrfs.new file. The old grub-btrfs.cfg file (if present) have been restored."
 fi

 # warn when this script is run but there is no entry in grub.cfg
-grep "snapshots-btrfs" "${grub_directory}/grub.cfg" || printf "\nWARNING: '%s' needs to run at least once to generate the snapshots (sub)menu entry in grub the main menu. \
+grep "snapshots-btrfs" "${grub_directory}/grub.cfg" >/dev/null 2>&1 || printf "\nWARNING: '%s' needs to run at least once to generate the snapshots (sub)menu entry in grub the main menu. \
 After that this script can run alone to generate the snapshot entries.\n\n" "${GRUB_BTRFS_MKCONFIG:-grub-mkconfig}" >&2 ;
--- a/70
+++ b/70
@@ -5,6 +5,12 @@ INITCPIO ?= false
 SYSTEMD ?= true
 OPENRC ?= false

+BOOT_DIR_DEBIAN ?= /boot/grub
+BOOT_DIR_FEDORA ?= /boot/grub2
+
+GRUB_UPDATE_EXCLUDE ?= false
+INSTALL_DOCS ?= true
+
 SHARE_DIR = $(DESTDIR)$(PREFIX)/share
 LIB_DIR = $(DESTDIR)$(PREFIX)/lib
 BIN_DIR = $(DESTDIR)$(PREFIX)/bin
@@ -12,6 +18,7 @@ MAN_DIR = $(SHARE_DIR)/man

 TEMP_DIR = ./temp

+
 .PHONY: install uninstall clean help

 install:
@@ -31,14 +38,20 @@ install:
 	@echo
 	@echo "  For further information visit https://github.com/Antynea/grub-btrfs or read the man page: 'man grub-btrfs'"
 	@echo
+	@rm -rf "${TEMP_DIR}"
 	@mkdir "${TEMP_DIR}"
 	@chmod 777 ${TEMP_DIR}
 	@cp manpages/grub-btrfs.8.man ${TEMP_DIR}/grub-btrfs.8
-	@bzip2 ${TEMP_DIR}/grub-btrfs.8
-	@install -Dm644 -t "${MAN_DIR}/man8" "${TEMP_DIR}/grub-btrfs.8.bz2"
+	@if test "$(INSTALL_DOCS)" = true; then \
+		echo "Installing manpages..."; \
+		bzip2 ${TEMP_DIR}/grub-btrfs.8; \
+		install -Dm644 -t "${MAN_DIR}/man8" "${TEMP_DIR}/grub-btrfs.8.bz2"; \
+	fi
 	@cp manpages/grub-btrfsd.8.man ${TEMP_DIR}/grub-btrfsd.8
-	@bzip2 ${TEMP_DIR}/grub-btrfsd.8
-	@install -Dm644 -t "${MAN_DIR}/man8" "${TEMP_DIR}/grub-btrfsd.8.bz2";
+	@if test "$(INSTALL_DOCS)" = true; then \
+		bzip2 ${TEMP_DIR}/grub-btrfsd.8; \
+		install -Dm644 -t "${MAN_DIR}/man8" "${TEMP_DIR}/grub-btrfsd.8.bz2"; \
+	fi
 	@install -Dm755 -t "$(DESTDIR)/etc/grub.d/" 41_snapshots-btrfs
 	@install -Dm644 -t "$(DESTDIR)/etc/default/grub-btrfs/" config
 	@install -Dm744 -t "$(BIN_DIR)/" grub-btrfsd;
@@ -59,10 +72,20 @@ install:
 		install -Dm644 "initramfs/Arch Linux/overlay_snap_ro-install" "$(LIB_DIR)/initcpio/install/grub-btrfs-overlayfs"; \
 		install -Dm644 "initramfs/Arch Linux/overlay_snap_ro-hook" "$(LIB_DIR)/initcpio/hooks/grub-btrfs-overlayfs"; \
 	 fi
-	@install -Dm644 -t "$(SHARE_DIR)/licenses/$(PKGNAME)/" LICENSE
-	@install -Dm644 -t "$(SHARE_DIR)/doc/$(PKGNAME)/" README.md
-	@install -Dm644 "initramfs/readme.md" "$(SHARE_DIR)/doc/$(PKGNAME)/initramfs-overlayfs.md"
-	@rm -rf "${TEMP_DIR}"
+	@if test "$(INSTALL_DOCS)" = true; then \
+		echo "Installing docs..."; \
+		install -Dm644 -t "$(SHARE_DIR)/licenses/$(PKGNAME)/" LICENSE; \
+		install -Dm644 -t "$(SHARE_DIR)/doc/$(PKGNAME)/" README.md; \
+		install -Dm644 "initramfs/readme.md" "$(SHARE_DIR)/doc/$(PKGNAME)/initramfs-overlayfs.md"; \
+	fi
+	@if command -v grub-mkconfig > /dev/null && [ -e "$(BOOT_DIR_DEBIAN)/grub.cfg" ] && test "$(GRUB_UPDATE_EXCLUDE)" = false; then \
+		echo "Updating the GRUB menu..."; \
+		grub-mkconfig -o "$(BOOT_DIR_DEBIAN)/grub.cfg"; \
+	 fi
+	@if command -v grub2-mkconfig > /dev/null && [ -e "$(BOOT_DIR_FEDORA)/grub.cfg" ] && test "$(GRUB_UPDATE_EXCLUDE)" = false; then \
+		echo "Updating the GRUB menu..."; \
+		grub2-mkconfig -o "$(BOOT_DIR_FEDORA)/grub.cfg"; \
+	fi

 uninstall:
 	@echo "Uninstalling grub-btrfs"
@@ -94,6 +117,14 @@ uninstall:
 	@rmdir --ignore-fail-on-non-empty "$(SHARE_DIR)/doc/$(PKGNAME)/" || :
 	@rmdir --ignore-fail-on-non-empty "$(SHARE_DIR)/licenses/$(PKGNAME)/" || :
 	@rmdir --ignore-fail-on-non-empty "$(DESTDIR)/etc/default/grub-btrfs" || :
+	@if command -v grub-mkconfig > /dev/null && [ -e "$(BOOT_DIR_DEBIAN)/grub.cfg" ] && test "$(GRUB_UPDATE_EXCLUDE)" = false; then \
+                echo "Updating the GRUB menu..."; \
+                grub-mkconfig -o "$(BOOT_DIR_DEBIAN)/grub.cfg"; \
+         fi
+	@if command -v grub2-mkconfig > /dev/null && [ -e "$(BOOT_DIR_FEDORA)/grub.cfg" ] && test "$(GRUB_UPDATE_EXCLUDE)" = false; then \
+		echo "Updating the GRUB menu..."; \
+		grub2-mkconfig -o "$(BOOT_DIR_FEDORA)/grub.cfg"; \
+	fi

 clean:
 	@echo "Deleting ./temp"
@@ -108,14 +139,17 @@ help:
 	@echo "           uninstall"
 	@echo "           help"
 	@echo
-	@echo "  parameter | type | description                    | defaults"
-	@echo "  ----------+------+--------------------------------+----------------------------"
-	@echo "  DESTDIR   | path | install destination            | <unset>"
-	@echo "  PREFIX    | path | system tree prefix             | '/usr'"
-	@echo "  SHARE_DIR | path | shared data location           | '\$$(DESTDIR)\$$(PREFIX)/share'"
-	@echo "  LIB_DIR   | path | system libraries location      | '\$$(DESTDIR)\$$(PREFIX)/lib'"
-	@echo "  PKGNAME   | name | name of the ditributed package | 'grub-btrfs'"
-	@echo "  INITCPIO  | bool | include mkinitcpio hook        | false"
-	@echo "  SYSTEMD   | bool | include unit files             | true"
-	@echo "  OPENRC    | bool | include OpenRc daemon          | false"
+	@echo "  parameter           | type | description                                           | defaults"
+	@echo "  --------------------+------+-------------------------------------------------------+----------------------------"
+	@echo "  DESTDIR             | path | install destination                                   | <unset>"
+	@echo "  PREFIX              | path | system tree prefix                                    | '/usr'"
+	@echo "  BOOT_DIR_DEBIAN     | path | boot data location (Debian, Ubuntu, Gentoo, Arch...)  | '/boot/grub'"
+	@echo "  BOOT_DIR_FEDORA     | path | boot data location (Fedora, RHEL, CentOS, Rocky...)   | '/boot/grub2'"
+	@echo "  SHARE_DIR           | path | shared data location                                  | '\$$(DESTDIR)\$$(PREFIX)/share'"
+	@echo "  LIB_DIR             | path | system libraries location                             | '\$$(DESTDIR)\$$(PREFIX)/lib'"
+	@echo "  PKGNAME             | name | name of the ditributed package                        | 'grub-btrfs'"
+	@echo "  INITCPIO            | bool | include mkinitcpio hook                               | false"
+	@echo "  SYSTEMD             | bool | include unit files                                    | true"
+	@echo "  OPENRC              | bool | include OpenRc daemon                                 | false"
+	@echo "  GRUB_UPDATE_EXCLUDE | bool | Do not update grub after installation                 | false"
 	@echo
--- a/README.md
+++ b/README.md
@@ -6,26 +6,25 @@
 ##### BTC donation address: `1Lbvz244WA8xbpHek9W2Y12cakM6rDe5Rt`
 - - -
 ### 🔎 Description:
-Improves grub by adding "btrfs snapshots" to the grub menu.
+grub-btrfs improves the grub bootloader by adding a btrfs snapshots sub-menu, allowing the user to boot into snapshots.

-You can boot your system on a "snapshot" from the grub menu.  
-Supports manual snapshots, snapper, timeshift ...
+grub-btrfs supports manual snapshots as well as snapper and timeshift created snapshots.

-##### Warning: booting on read-only snapshots can be tricky
+##### Warning: booting read-only snapshots can be tricky

-If you choose to do it, `/var/log` or even `/var` must be on a separate subvolume.  
-Otherwise, make sure your snapshots are writable.  
+If you wish to use read-only snapshots, `/var/log` or even `/var` must be on a separate subvolume.
+Otherwise, make sure your snapshots are writable.
 See [this ticket](https://github.com/Antynea/grub-btrfs/issues/92) for more info.

-This project includes its own solution.  
+This project includes its own solution.
 Refer to the [documentation](https://github.com/Antynea/grub-btrfs/blob/master/initramfs/readme.md).

 - - -
 ### ✨ What features does grub-btrfs have?
-* Automatically list snapshots existing on root partition (btrfs).
-* Automatically detect if `/boot` is in separate partition.
-* Automatically detect kernel, initramfs and Intel/AMD microcode in `/boot` directory on snapshots.
-* Automatically create corresponding "menuentry" in `grub.cfg`
+* Automatically lists snapshots existing on the btrfs root partition.
+* Automatically detect if `/boot` is in a separate partition.
+* Automatically detect kernel, initramfs and Intel/AMD microcode in `/boot` directory within snapshots.
+* Automatically create corresponding menu entries in `grub.cfg`
 * Automatically detect the type/tags and descriptions/comments of Snapper/Timeshift snapshots.
 * Automatically generate `grub.cfg` if you use the provided Systemd/ OpenRC service.

@@ -56,118 +55,89 @@ Emerge grub-btrfs via
 ```
 apt install grub-btrfs
 ```
-Booting into read-only snapshots is fully supported when choosing "btrfs" as file system during a standard Kali Linux installation following [this walk-through](https://www.kali.org/docs/installation/btrfs/).  
+Booting into read-only snapshots is fully supported when choosing btrfs as the file system during a standard Kali Linux installation following [this walk-through](https://www.kali.org/docs/installation/btrfs/).

-#### Manual
-* Run `make install` or look into Makefile for instructions on where to put each file.
+#### Manual installation
+* Run `make install`
 * Run `make help` to check what options are available. 
 * Dependencies:
  * [btrfs-progs](https://archlinux.org/packages/core/x86_64/btrfs-progs/)
  * [grub](https://archlinux.org/packages/core/x86_64/grub/)
  * [bash >4](https://archlinux.org/packages/core/x86_64/bash/)
  * [gawk](https://archlinux.org/packages/core/x86_64/gawk/)
-  * (only when using the daemon)[inotify-tools](https://archlinux.org/packages/community/x86_64/inotify-tools/)
+  * (only when using the grub-btrfsd daemon)[inotify-tools](https://archlinux.org/packages/community/x86_64/inotify-tools/)

 - - -
-### 📚 Usage
-After installation the grub main menu needs to be generated to make a menuentry for the snapshots sub menu. Depending on the Linux distribution the commands for that are different:
+### 📚 Manual usage of grub-btrfs
+To manually generate grub snapshot entries you can run `sudo /etc/grub.d/41_snapshots-btrfs` which updates `grub-btrfs.cfg`. You then need to regenerate the GRUB configuration by running one of the following commands:
+
 * On **Arch Linux** or **Gentoo** use `grub-mkconfig -o /boot/grub/grub.cfg`.  
 * On **Fedora** use `grub2-mkconfig -o /boot/grub2/grub.cfg`  
-* On **Debian-like** distribution `update-grub` is an alias to `grub-mkconfig ...`
+* On **Debian and Ubuntu based** distributions `update-grub` is a script that runs `grub-mkconfig ...`

-Once the entry for the sub menu was generated grub-btrfs puts the actual sub menu into the file grub-btrfs.cfg. So to generate snapshot entries in the sub menu it is usually enough to run only the script with `sudo /etc/grub.d/41_snapshots-btrfs`.
-Read further below on how to automate this process. 
+This process can be automated to occur whenever you create or delete snaphots but this process is slightly different depending upon your distributions choice on init system. See the relevant instructions for your init system below.

 ### ⚙️ Customization:

-You have the possibility to modify many parameters in `/etc/default/grub-btrfs/config`.  
+You have the possibility to modify many parameters in `/etc/default/grub-btrfs/config`.
 For further information see [config file](https://github.com/Antynea/grub-btrfs/blob/master/config) or `man grub-btrfs`

 #### Warning:
 Some file locations and command names differ from distribution to distribution. Initially the configuration is set up to work with Arch and Gentoo (and many other distributions) out of the box, which are using the `grub-mkconfig` command. 
-However, Fedora for example uses a different command, `grub2-mkconfig`.
-Edit `GRUB_BTRFS_MKCONFIG` variable in `/etc/default/grub-btrfs/config` file to reflect this. (e.g. `GRUB_BTRFS_MKCONFIG=/sbin/grub2-mkconfig` for Fedora)
+However Fedora, for example, uses a different command, `grub2-mkconfig`.
+Edit the `GRUB_BTRFS_MKCONFIG` variable in `/etc/default/grub-btrfs/config` file to reflect this. (e.g. `GRUB_BTRFS_MKCONFIG=/sbin/grub2-mkconfig` for Fedora)

-On most distributions and installs, the grub installation resides in `/boot/grub`. If grub is installed in a different place, change the variable `GRUB_BTRFS_MKCONFIG` in the config file accordingly. For Fedora this is `GRUB_BTRFS_GRUB_DIRNAME="/boot/grub2"`. Also the command to check the grub scripts is different on some system, for Fedora it is `GRUB_BTRFS_SCRIPT_CHECK=grub2-script-check`
+On most distributions, the grub installation resides in `/boot/grub`. If grub is installed in a different place, change the variable `GRUB_BTRFS_MKCONFIG` in the config file accordingly. For Fedora this is `GRUB_BTRFS_GRUB_DIRNAME="/boot/grub2"`. The command to check the grub scripts is different on some system, for Fedora it is `GRUB_BTRFS_SCRIPT_CHECK=grub2-script-check`

 #### Customization of the grub-btrfsd daemon

-Grub-btrfs comes with a daemon script that automatically updates the grub menu when it sees a snapshot being created or deleted in a directory it is given via command line.
+Grub-btrfs comes with a daemon script that automatically updates the grub menu when it sees a snapshot being created or deleted in a directory it is given via command line. You must install `inotify-tools` before you can use grub-btrfsd.

 The daemon can be configured by passing different command line arguments to it. 
-The arguments are:
-* `SNAPSHOTS_DIR`
-This argument specifies the path where grub-btrfsd looks for newly created snapshots and snapshot deletions. It is usually defined by the program used to make snapshots.
-E.g. for Snapper this would be `/.snapshots`
+The available arguments are:
+* `SNAPSHOTS_DIRS`
+This argument specifies the (space separated) paths where grub-btrfsd looks for newly created snapshots and snapshot deletions. It is usually defined by the program used to make snapshots.
+E.g. for Snapper this would be `/.snapshots`. It is possible to define more than one directory here, all directories will inherit the same settings (recursive etc.).
+This argument is not necessary to provide if `--timeshift-auto` is set. 
 * `-c / --no-color`
 Disable colors in output.
 * `-l / --log-file`
 This arguments specifies a file where grub-btrfsd should write log messages.
+* `-r / --recursive`
+Watch the snapshots directory recursively
 * `-s / --syslog`
+* `-o / --timeshift-old`
+Look for snapshots in `/run/timeshift/backup/timeshift-btrfs` instead of `/run/timeshift/$PID/backup/timeshift-btrfs.` This is to be used for Timeshift versions <22.06. You must also use `--timeshift-auto` if using this option.
 * `-t / --timeshift-auto`
-This is a flag to activate the auto detection of the path where Timeshift stores snapshots. Newer versions (>=22.06) of Timeshift mount their snapshots to `/run/timeshift/$PID/backup/timeshift-btrfs`. Where `$PID` is the process ID of the currently running Timeshift session. The PID is changing every time Timeshift is opened. grub-btrfsd can automatically take care of the detection of the correct PID and directory if this flag is set. In this case the argument `SNAPSHOTS_DIR` has no effect.
+This is a flag to activate the auto-detection of the path where Timeshift stores snapshots. Newer versions (>=22.06) of Timeshift mount their snapshots to `/run/timeshift/$PID/backup/timeshift-btrfs`. Where `$PID` is the process ID of the currently running Timeshift session. The PID changes every time Timeshift is opened. grub-btrfsd can automatically take care of the detection of the correct PID and directory if this flag is set. In this case the argument `SNAPSHOTS_DIRS` has no effect.
 * `-v / --verbose`
 Let the log of the daemon be more verbose
 * `-h / --help`
 Displays a short help message.
 - - - 
-##### Systemd instructions
-To edit the arguments that are passed to the daemon, use 
-```bash
-sudo systemctl edit --full grub-btrfsd
-```
-after that the Daemon must be restarted with
-```bash
-sudo systemctl restart grub-btrfsd 
-```
-
-It is also possible to start the daemon without using systemd for troubleshooting purposes for example. If you want to do this, a running daemon should be stopped with
-```bash
-sudo systemctl stop grub-btrfsd 
-```
-Then the daemon can be manually run and played around with using the command `/usr/bin/grub-btrfsd`. 
-For additional information on the daemon script and its arguments, run `grub-btrfsd -h` and see `man grub-btrfsd`
- - -
-##### OpenRC instructions
-To edit the arguments that are passed to the daemon edit the file `/etc/conf.d/grub-btrfsd`.  
-After that restart the daemon with
-```
-sudo rc-service grub-btrfsd restart 
-```
-
-It is also possible to start the daemon without using OpenRC for troubleshooting purposes for example. If you want to do this, a running daemon should be stopped with
-```bash
-sudo rc-service grub-btrfsd stop 
-```
-Then the daemon can be manually run and played around with using the command `grub-btrfsd`. 
-For additional information on daemon script and its arguments, run `grub-btrfsd -h` and see `man grub-btrfsd`
-
+### 🪀 Automatically update grub upon snapshot creation or deletion
+Grub-btrfsd is a daemon that watches the snapshot directory for you and updates the grub menu automatically every time a snapshot is created or deleted.
+By default this daemon watches the directory `/.snapshots` for changes (creation or deletion of snapshots) and triggers the grub menu creation and re-installation of grub if any changes are noticed.
+Therefore, if Snapper is used with its default directory, the daemon can just be started and nothing needs to be configured. See the instructions below to configure grub-btrfsd for use with Timeshift or when using an alternative snapshots directory with Snapper.
 - - - 
-### 🪀 Automatically update grub upon snapshot
-Grub-btrfsd is a daemon daemon that watches the snapshot directory for you and updates the grub menu automatically every time a snapshot is created or deleted. 
-By default this daemon watches the directory `/.snapshots` for changes (creation or deletion of snapshots) and triggers the grub menu creation if a snapshot is found. 
-Therefore, if Snapper is used with its default directory, the daemon can just be started and nothing needs to be configured. For other configurations like Timeshift, or Snapper with a different directory, see further below. 
- - - 
-#### SystemD instructions
-To start the daemon run 
+#### grub-btrfsd systemd instructions
+To start the daemon run:
 ```bash
 sudo systemctl start grub-btrfsd
 ```

-To activate it during system startup, run 
+To activate it during system startup, run:
 ```bash
 sudo systemctl enable grub-btrfsd
 ```

-##### 💼 Snapshots not in `/.snapshots`
-NOTE: This works also for Timeshift versions < 22.06, the path to watch would be `/run/timeshift/backup/timeshift-btrfs/snapshots`.
-
-By default the daemon is watching the directory `/.snapshots`. If the daemon should watch a different directory, it can be edited with
+##### 💼 Snapshots not in `/.snapshots` when using systemd
+By default the daemon is watching the directory `/.snapshots`. If the daemon should watch a different directory, it can be edited with:
 ```bash
 sudo systemctl edit --full grub-btrfsd 
 ```
-What should be edited is the `/.snapshots`-part in the line that says `ExecStart=/usr/bin/grub-btrfsd --syslog /.snapshots`. 
-So this is what the file should look afterwards:
+You need to edit the `/.snapshots` part in the line that says `ExecStart=/usr/bin/grub-btrfsd --syslog /.snapshots`.
+This is what the file should look like afterwards:
 ``` bash
 [Unit]
 Description=Regenerate grub-btrfs.cfg
@@ -180,46 +150,47 @@ Environment="PATH=/sbin:/bin:/usr/sbin:/usr/bin"
 # Load environment variables from the configuration
 EnvironmentFile=/etc/default/grub-btrfs/config
 # Start the daemon, usage of it is:
-# grub-btrfsd [-h, --help] [-t, --timeshift-auto] [-l, --log-file LOG_FILE] SNAPSHOTS_DIR
-# SNAPSHOTS_DIR         Snapshot directory to watch, without effect when --timeshift-auto
+# grub-btrfsd [-h, --help] [-t, --timeshift-auto] [-l, --log-file LOG_FILE] SNAPSHOTS_DIRS
+# SNAPSHOTS_DIRS         Snapshot directories to watch, without effect when --timeshift-auto
 # Optional arguments:
 # -t, --timeshift-auto  Automatically detect Timeshifts snapshot directory
+# -o, --timeshift-old   Activate for timeshift versions <22.06
 # -l, --log-file        Specify a logfile to write to
 # -v, --verbose         Let the log of the daemon be more verbose
 # -s, --syslog          Write to syslog
-ExecStart=/usr/bin/grub-btrfsd --syslog /path/to/your/snapshot/directory
+ExecStart=/usr/bin/grub-btrfsd --syslog /.snapshots

 [Install]
 WantedBy=multi-user.target
 ```

-When done, the service should be restarted with
+When done, the service should be restarted with:
 ``` bash
 sudo systemctl restart grub-btrfsd 
 ```

-##### 🌟 Timeshift >= version 22.06
-Newer Timeshift versions create a new directory named after their process ID in `/run/timeshift` every time they are started. The PID is going to be different every time. 
-Therefore the daemon can not simply watch a directory, it watches `/run/timeshift` first, if a directory is created it gets Timeshifts current PID, then watches a directory in that newly created directory from Timeshift. 
-Anyhow, to activate this mode of the daemon, `--timeshift-auto` must be passed to the daemon as a command line argument. 
+##### 🌟 Using Timeshift with systemd
+Newer Timeshift versions (>= 22.06) create a new directory named after their process ID in `/run/timeshift` every time they are started. The PID will be different every time.
+Therefore the daemon cannot simply watch a directory. It monitors `/run/timeshift` and if a directory is created it gets Timeshifts current PID then watches a directory in that newly created directory from Timeshift.
+To activate this mode of the daemon, `--timeshift-auto` must be passed to the daemon as a command line argument.

-To pass `--timeshift-auto` to grub-btrfsd, the .service-file of grub-btrfsd can be edited with
+To pass `--timeshift-auto` to grub-btrfsd, the .service file of grub-btrfsd can be edited with
 ```bash
 sudo systemctl edit --full grub-btrfsd 
 ```

-The line that says 
+The line that contains:
 ```bash 
 ExecStart=/usr/bin/grub-btrfsd /.snapshots --syslog

 ```

-should be edited into 
+Should be modified to read:
 ``` bash
 ExecStart=/usr/bin/grub-btrfsd --syslog --timeshift-auto
 ```

-So the file looks like this, afterwards:
+The modified file should look like this:
 ``` bash
 [Unit]
 Description=Regenerate grub-btrfs.cfg
@@ -232,8 +203,8 @@ Environment="PATH=/sbin:/bin:/usr/sbin:/usr/bin"
 # Load environment variables from the configuration
 EnvironmentFile=/etc/default/grub-btrfs/config
 # Start the daemon, usage of it is:
-# grub-btrfsd [-h, --help] [-t, --timeshift-auto] [-l, --log-file LOG_FILE] SNAPSHOTS_DIR
-# SNAPSHOTS_DIR         Snapshot directory to watch, without effect when --timeshift-auto
+# grub-btrfsd [-h, --help] [-t, --timeshift-auto] [-l, --log-file LOG_FILE] SNAPSHOTS_DIRS
+# SNAPSHOTS_DIRS         Snapshot directories to watch, without effect when --timeshift-auto
 # Optional arguments:
 # -t, --timeshift-auto  Automatically detect Timeshifts snapshot directory
 # -l, --log-file        Specify a logfile to write to
@@ -245,7 +216,13 @@ ExecStart=/usr/bin/grub-btrfsd --syslog --timeshift-auto
 WantedBy=multi-user.target
 ```

-When done, the service must be restarted with
+If you are using an older release of Timeshift (before 22.06), you also need to add `--timeshift-old` so that your ExecStart line would look like:
+
+```
+ExecStart=/usr/bin/grub-btrfsd --syslog --timeshift-auto --timeshift-old
+```
+
+When done, the service must be restarted with:
 ``` bash
 sudo systemctl restart grub-btrfsd 
 ```
@@ -254,116 +231,55 @@ Note:
 You can view your change with `systemctl cat grub-btrfsd`.
 To revert all the changes use `systemctl revert grub-btrfsd`.

-##### ❇️ Automatically update grub upon restart/boot:
-[Look at this comment](https://github.com/Antynea/grub-btrfs/issues/138#issuecomment-766918328)  
-Currently not implemented
 - - -
-#### OpenRC instructions
-To start the daemon run
+#### grub-btrfsd OpenRC instructions
+To start the daemon run:
 ```bash
 sudo rc-service grub-btrfsd start 
 ```

-To activate it during system startup, run 
+To activate it during system startup, run:
 ```bash
 sudo rc-config add grub-btrfsd default 
 ```

-##### 💼 Snapshots not in `/.snapshots`
-NOTE: This works also for Timeshift versions < 22.06, the path to watch would be `/run/timeshift/backup/timeshift-btrfs/snapshots`.
-
+##### 💼 Snapshots not in `/.snapshots` for OpenRC
 By default the daemon is watching the directory `/.snapshots`. If the daemon should watch a different directory, it can be edited by passing different arguments to it.
 Arguments are passed to grub-btrfsd via the file `/etc/conf.d/grub-btrfsd`. 
-The variable `snapshots` defines, where the daemon will watch for snapshots. 
+The variable `snapshots` defines the path the daemon will monitor for snapshots.

 After editing, the file should look like this:
 ``` bash
 # Copyright 2022 Pascal Jaeger
 # Distributed under the terms of the GNU General Public License v3

-## Where to locate the root snapshots
-#snapshots="/.snapshots" # Snapper in the root directory
-#snapshots="/run/timeshift/backup/timeshift-btrfs/snapshots" # Timeshift < v22.06
-snapshots="/path/to/your/snapshot/directory"
-
-## Optional arguments to run with the daemon
-# Possible options are:
-# -t, --timeshift-auto  Automatically detect Timeshifts snapshot directory for timeshift >= 22.06
-# -l, --log-file        Specify a logfile to write to
-# -v, --verbose         Let the log of the daemon be more verbose
-# -s, --syslog          Write to syslog
-# Uncomment the line to activate the option
-optional_args+="--syslog " # write to syslog by default
-#optional_args+="--timeshift-auto "
-#optional_args+="--log-file /var/log/grub-btrfsd.log "
-#optional_args+="--verbose "
-```
-
-After that, the daemon should be restarted with
-``` bash
-sudo rc-service grub-btrfsd restart 
-```
-
-##### 🌟 Timeshift >= version 22.06
-Arguments are passed to grub-btrfsd via the file `/etc/conf.d/grub-btrfsd`. 
-The variable `optional_args` defines, which optional arguments get passed to the daemon. 
-Uncomment `#optional_args+="--timeshift-auto "` to pass the command line option `--timeshift-auto` to it. 
-
-After the change, the file should look like this:
-(Note that there is no need to comment out the `snapshots` variable. It is ignored when `--timeshift-auto` is active.)
-``` bash
-# Copyright 2022 Pascal Jaeger
-# Distributed under the terms of the GNU General Public License v3
-
 ## Where to locate the root snapshots
 snapshots="/.snapshots" # Snapper in the root directory
 #snapshots="/run/timeshift/backup/timeshift-btrfs/snapshots" # Timeshift < v22.06

 ## Optional arguments to run with the daemon
+# Append options to this like this:
+# optional_args="--syslog --timeshift-auto --verbose"
 # Possible options are:
 # -t, --timeshift-auto  Automatically detect Timeshifts snapshot directory for timeshift >= 22.06
+# -o, --timeshift-old   Look for snapshots in directory of Timeshift <v22.06 (requires --timeshift-auto)
 # -l, --log-file        Specify a logfile to write to
 # -v, --verbose         Let the log of the daemon be more verbose
 # -s, --syslog          Write to syslog
-# Uncomment the line to activate the option
-optional_args+="--syslog " # write to syslog by default
-optional_args+="--timeshift-auto "
-#optional_args+="--log-file /var/log/grub-btrfsd.log "
-#optional_args+="--verbose "
+optional_args="--syslog"
 ```

-After that, the daemon should be restarted with
+After that, the daemon should be restarted with:
 ``` bash
-sudo rc-service grub-btrfsd restart 
+sudo rc-service grub-btrfsd restart
 ```

-##### ❇️ Automatically update grub upon restart/boot:
-If you would like the grub-btrfs menu to automatically update on system restart/ shutdown, just add the following script as `/etc/local.d/grub-btrfs-update.stop`:
-```bash
-#!/usr/bin/env bash
-
-description="Update the grub btrfs snapshots menu"
-name="grub-btrfs-update"
-
-depend()
-{
-	use localmount
-}
-	
-bash -c 'if [ -s "${GRUB_BTRFS_GRUB_DIRNAME:-/boot/grub}/grub-btrfs.cfg" ]; then /etc/grub.d/41_snapshots-btrfs; else {GRUB_BTRFS_MKCONFIG:-grub-mkconfig} -o {GRUB_BTRFS_GRUB_DIRNAME:-/boot/grub}/grub.cfg; fi' 
-```
-
-Make your script executable with `sudo chmod a+x /etc/local.d/grub-btrfs-update.stop`.
-
-* The extension `.stop` at the end of the filename indicates to the locald-daemon that this script should be run at shutdown. 
- If you want to run the menu update on system startup instead, rename the file to `grub-btrfs-update.start`
-* Works for Snapper and Timeshift
 - - -
 ### Troubleshooting
-If there are problems don't hesitate [to file an issue](https://github.com/Antynea/grub-btrfs/issues/new/choose). 
+If you experience problems with grub-btrfs don't hesitate [to file an issue](https://github.com/Antynea/grub-btrfs/issues/new/choose).

-#### Version
-To help the best we would like to know the version of grub-btrfs used. Please run
+#### What version of grub-btrfs am I running?
+When requesting help or reporting bugs in grub-btrfs, please run:
 ``` bash
 sudo /etc/grub.d/41_snapshots-btrfs --version
 ```
@@ -371,18 +287,37 @@ or
 ``` bash
 sudo /usr/bin/grub-btrfsd --help
 ```
-to get the currently running version of grub-btrfs.
+to get the currently running version of grub-btrfs and include this information in your ticket.

-#### Verbose mode of the daemon
-If you have problems with the daemon, you can run it with the `--verbose`-flag. To do so you can run 
+#### Running grub-btrfsd in verbose mode
+If you have problems with the daemon, you can run it with the `--verbose`-flag. To do so you can run:
 ``` bash
 sudo /usr/bin/grub-btrfsd --verbose --timeshift-auto` (for timeshift)
 # or 
 sudo /usr/bin/grub-btrfsd /.snapshots --verbose` (for snapper)
 ```
-Or pass `--verbose` to the daemon using the Systemd .service-file or the OpenRC conf.d file respectively. (see Daemon installation instructions how to do that)
+Or pass `--verbose` to the daemon using the Systemd .service file or the OpenRC conf.d file respectively.
+
+For additional information on the daemon and its arguments, run `grub-btrfsd -h` or `man grub-btrfsd`

 - - -
+### Development
+Grub-btrfs uses a rudimentary system of automatic versioning to tell apart different commits. This is helpful when users report problems and it is not immediately clear what version they are using. 
+We therefore have the following script in `.git/hooks/pre-commit`:
+
+``` bash
+#!/bin/sh
+
+echo "Doing pre commit hook with version bump"
+version="$(git describe --tags --abbrev=0)-$(git rev-parse --abbrev-ref HEAD)-$(date -u -Iseconds)"
+echo "New version is ${version}"
+sed -i "s/GRUB_BTRFS_VERSION=.*/GRUB_BTRFS_VERSION=${version}/" config
+git add config
+```
+
+This automatically sets the version in the `config`-file to `[lasttag]-[branch-name]-[current-date-in-UTC]`.
+In order to create a Tag we don't want to have this long version. In this case we set the version manually in `config` and commit with `git commit --no-verify`. This avoids running the hook. 
+
 ### Special thanks for assistance and contributions
 * [Maxim Baz](https://github.com/maximbaz)
 * [Schievel1](https://github.com/Antynea/grub-btrfs/discussions/173#discussioncomment-1438790)
--- a/16
+++ b/16
@@ -1,6 +1,7 @@
 #!/usr/bin/env bash

-GRUB_BTRFS_VERSION=4.12-make-prefix-configurable-2022-11-26T14:14:00+00:00
+
+GRUB_BTRFS_VERSION=4.12-master-2023-04-28T16:26:00+00:00

 # Disable grub-btrfs.
 # Default: "false"
@@ -48,6 +49,13 @@ GRUB_BTRFS_VERSION=4.12-make-prefix-configurable-2022-11-26T14:14:00+00:00
 # Default: ("")
 #GRUB_BTRFS_CUSTOM_MICROCODE=("custom-ucode.img" "custom-uc.img "custom_ucode.cpio")

+# Additonal kernel command line parameters that should be passed to the kernel
+# when booting a snapshot.
+# For dracut based distros this could be useful to pass "rd.live.overlay.overlayfs=1"
+# or "rd.live.overlay.readonly=1" to the Kernel for booting snapshots read only.
+# Default: ""
+#GRUB_BTRFS_SNAPSHOT_KERNEL_PARAMETERS="rd.live.overlay.overlayfs=1"
+
 # Comma seperated mount options to be used when booting a snapshot.
 # They can be defined here as well as in the "/" line inside the respective snapshots'
 # "/etc/fstab" files.  Mount options found in both places are combined, and this variable
@@ -88,9 +96,7 @@ GRUB_BTRFS_IGNORE_PREFIX_PATH=("var/lib/docker" "@var/lib/docker" "@/var/lib/doc
 #GRUB_BTRFS_OVERRIDE_BOOT_PARTITION_DETECTION="true"

 # Location of the folder containing the "grub.cfg" file.
-# Use by grub-btrfs to save the file "grub-btrfs.cfg".
 # Might be grub2 on some systems.
-# For example, on Fedora with EFI : "/boot/efi/EFI/fedora"
 # Default: "/boot/grub"
 #GRUB_BTRFS_GRUB_DIRNAME="/boot/grub2"

@@ -100,10 +106,10 @@ GRUB_BTRFS_IGNORE_PREFIX_PATH=("var/lib/docker" "@var/lib/docker" "@/var/lib/doc
 #GRUB_BTRFS_BOOT_DIRNAME="/boot"

 # Location where grub-btrfs.cfg should be saved.
-# Some distributions (like OpenSuSE) store those file at the snapshot directory
+# Some distributions (like OpenSuSE) store those files at the snapshot directory
 # instead of boot. Be aware that this direcory must be available for grub during
 # startup of the system.
-# Default: "/boot/grub"
+# Default: $GRUB_BTRFS_GRUB_DIRNAME
 #GRUB_BTRFS_GBTRFS_DIRNAME="/boot/grub"

 # Location of the directory where Grub searches for the grub-btrfs.cfg file.
--- a/460
+++ b/460
@@ -1,16 +1,15 @@
-#!/bin/sh
-# Copyright 2022 Pascal Jaeger
+#!/usr/bin/env bash
+# Copyright 2023 Pascal Jaeger
 # Distributed under the terms of the GNU General Public License v3
 # Update GRUB when new BTRFS snapshots are created.

-# init
-timeshift_pid=-1
-watchtime=0
-logfile=0
-snapshots=-1
-timeshift_auto=false
-verbose=false
-syslog=false
+sighandler() {
+    trap '""' SIGINT SIGTERM
+    vlog "Parent $$: Received signal SIGINT/ SIGTERM"
+    kill 0
+    wait
+    exit 0
+}

 setcolors() {
    if [ "${1}" = true ]; then
@@ -20,239 +19,322 @@ setcolors() {
          RESET=$'\033[0m'
    fi
    if [ "${1}" = false ]; then
-        GREEN=$'\033[0;0m'
-        RED=$'\033[0;0m'
-        CYAN=$'\033[;0m'
-        RESET=$'\033[0m'
+          GREEN=$'\033[0;0m'
+          RED=$'\033[0;0m'
+          CYAN=$'\033[;0m'
+          RESET=$'\033[0m'
    fi
 }
-setcolors true # normally we want colors
-
-sysconfdir="/etc"
-grub_btrfs_config="${sysconfdir}/default/grub-btrfs/config"
-# source config file
-[[ -f "$grub_btrfs_config" ]] && . "$grub_btrfs_config"
-[[ -f "${sysconfdir}/default/grub" ]] && . "${sysconfdir}/default/grub"

 print_help() {
-            echo "${CYAN}[?] Usage:"
-            echo "${0##*/} [-h, --help] [-c, --no-color] [-l, --log-file LOG_FILE] [-s, --syslog] [-t, --timeshift-auto] [-v, --verbose] SNAPSHOTS_DIR"
-            echo
-            echo "SNAPSHOTS_DIR         Snapshot directory to watch, without effect when --timeshift-auto"
-            echo
-            echo "Optional arguments:"
-            echo "-c, --no-color        Disable colors in output"
-            echo "-l, --log-file        Specify a logfile to write to"
-            echo "-s, --syslog          Write to syslog"
-            echo "-t, --timeshift-auto  Automatically detect Timeshifts snapshot directory"
-            echo "-v, --verbose         Let the log of the daemon be more verbose"
-            echo "-h, --help            Display this message"
-            echo
-            echo "Version ${GRUB_BTRFS_VERSION}${RESET}"
+    echo "${CYAN}[?] Usage:"
+    echo "${0##*/} [-h, --help] [-c, --no-color] [-l, --log-file LOG_FILE] [-r, --recursive] [-s, --syslog] [-t, --timeshift-auto] [-v, --verbose] SNAPSHOTS_DIRS"
+    echo
+    echo "SNAPSHOTS_DIRS         Snapshot directories to watch, without effect when --timeshift-auto"
+    echo
+    echo "Optional arguments:"
+    echo "-c, --no-color        Disable colors in output"
+    echo "-l, --log-file        Specify a logfile to write to"
+    echo "-r, --recursive       Watch snapshots directory recursively"
+    echo "-s, --syslog          Write to syslog"
+    echo "-o, --timeshift-old   Look for snapshots in directory of Timeshift <v22.06 (requires --timeshift-auto)"
+    echo "-t, --timeshift-auto  Automatically detect Timeshifts snapshot directory"
+    echo "-v, --verbose         Let the log of the daemon be more verbose"
+    echo "-h, --help            Display this message"
+    echo
+    echo "Version ${GRUB_BTRFS_VERSION}${RESET}"
 }

 log() {
    echo "${2}"$1"${RESET}"
    if [ ${syslog} = true ]; then
-        logger -p user.notice -t ${0##*/}"["$$"]" "$1"
+          logger -p user.notice -t ${0##*/}"["$$"]" "$1"
    fi
    if [ ${#logfile} -gt 1  ]; then
-        echo "$(date) ${1}" >> ${logfile}
+          echo "$(date) ${1}" >> "${logfile}"
    fi
 }

 vlog() {
    if [ ${verbose} = true ]; then
-       echo "${2}"$1"${RESET}"
-       if [ ${syslog} = true ]; then
-           logger -p user.notice -t ${0##*/} "$1"
-       fi
-       if [ ${#logfile} -gt 1  ]; then
-        echo "$(date) ${1}" >> ${logfile}
-       fi
+          echo "${2}"$1"${RESET}"
+          if [ ${syslog} = true ]; then
+                logger -p user.notice -t ${0##*/} "$1"
+          fi
+          if [ ${#logfile} -gt 1  ]; then
+                echo "$(date) ${1}" >> "${logfile}"
+          fi
    fi
 }

 err() {
-  echo "${2}"${1}"${RESET}" >&2
-  if [ ${syslog} = true ]; then
-      logger -p user.error -t ${0##*/} "$1"
-  fi
-  if [ ${#logfile} -gt 1  ]; then
-      echo "$(date) error: ${1}" >> ${logfile}
-  fi
+    echo "${2}"${1}"${RESET}" >&2
+    if [ ${syslog} = true ]; then
+          logger -p user.error -t ${0##*/} "$1"
+    fi
+    if [ ${#logfile} -gt 1  ]; then
+          echo "$(date) error: ${1}" >> "${logfile}"
+    fi
 }

-# parse arguments
-while getopts :l:ctvsh-: opt; do
-    case "$opt" in
-        -)
-            case "${OPTARG}" in
-                no-color)
+parse_arguments() {
+    while getopts :l:ctvrsh-: opt; do
+            case "$opt" in
+                -)
+                    case "${OPTARG}" in
+                        no-color)
+                            setcolors false
+                            ;;
+                        log-file)
+                            logfile="${!OPTIND}"; OPTIND=$(( $OPTIND + 1 ))
+                            ;;
+                        timeshift-auto)
+                            timeshift_auto=true
+                            ;;
+                        timeshift-old)
+                            timeshift_old=true
+                            ;;
+                        verbose)
+                            verbose=true
+                            ;;
+                        recursive)
+                            recursive=true
+                            ;;
+                        syslog)
+                            syslog=true
+                            ;;
+                        help)
+                            print_help
+                            exit 0
+                            ;;
+                        *)
+                            if [ "$OPTERR" = 1 ] && [ "${optspec:0:1}" != ":" ]; then
+                                  err "[!] Unknown option --${OPTARG}" "${RED}" >&2
+                                  echo
+                            fi
+                            print_help
+                            exit 1
+                            ;;
+                    esac;;
+                c)
                    setcolors false
                    ;;
-                log-file)
-                    logfile="${!OPTIND}"; OPTIND=$(( $OPTIND + 1 ))
+                l)
+                    logfile="${OPTARG}"
                    ;;
-                timeshift-auto)
+                t)
                    timeshift_auto=true
                    ;;
-                verbose)
+                o)
+                    timeshift_old=true
+                    ;;
+                v)
                    verbose=true
                    ;;
-                syslog)
+                r)
+                    recursive=true
+                    ;;
+                s)
                    syslog=true
                    ;;
-                help)
+                h)
                    print_help
                    exit 0
                    ;;
                *)
-                    if [ "$OPTERR" = 1 ] && [ "${optspec:0:1}" != ":" ]; then
-                        err "[!] Unknown option --${OPTARG}" "${RED}" >&2
-                        echo
+                    if [ "$OPTERR" = 1 ] || [ "${optspec:0:1}" = ":" ]; then
+                          err "[!] Non-option argument: '-${OPTARG}'" "${RED}" >&2
+                          echo
                    fi
                    print_help
                    exit 1
                    ;;
-            esac;;
-        c)
-            setcolors false
-            ;;
-        l)
-            logfile="${OPTARG}"
-            ;;
-        t)
-            timeshift_auto=true
-            ;;
-        v)
-            verbose=true
-            ;;
-        s)
-            syslog=true
-            ;;
-        h)
-            print_help
-            exit 0
-            ;;
-        *)
-            if [ "$OPTERR" = 1 ] || [ "${optspec:0:1}" = ":" ]; then
-                err "[!] Non-option argument: '-${OPTARG}'" "${RED}" >&2
-                echo
-            fi
-            print_help
-            exit 1
-            ;;
-    esac
-done
-shift $(( OPTIND - 1 ))
+            esac
+    done
+}

-snapshots="${1}"
+checks() {
+    # check if inotify exists, see issue #227
+    if ! command -v inotifywait >/dev/null 2>&1; then
+          err "[!] inotifywait was not found, exiting. Is inotify-tools installed?" "${RED}" >&2
+          exit 1
+    fi

-# check if inotify exists, see issue #227
-if ! command -v inotifywait &> /dev/null; then
-    err "[!] inotifywait was not found, exiting. Is inotify-tools installed?" "${RED}" >&2
-    exit 1
-fi
+    if [ ${timeshift_auto} = false ] && [ ${timeshift_old} = true ]; then
+          err "[!] Flag --timeshift-old requires flag --timeshift-auto" "${RED}" >&2
+          exit 1
+    fi

-if [ ${#logfile} -gt 1  ]; then
-    touch "${logfile}"
-    echo "GRUB-BTRFSD log $(date)" >> "${logfile}"
-fi
+    if ! [ ${timeshift_auto} = true ]; then
+          for snapdir in "${snapdirs[@]}"
+              do
+                  if ! [ -d ${snapdir} ]; then
+                        err "[!] No directory found at ${snapdir}" "${RED}" >&2
+                        err "[!] Please specify a valid snapshot directory" "${RED}" >&2
+                        exit 1
+                  fi
+          done
+    fi
+}

-log  "grub-btrfsd starting up..." "${GREEN}"
+setup() {
+    if [ ${#logfile} -gt 1  ]; then
+          touch "${logfile}"
+          echo "GRUB-BTRFSD log $(date)" >> "${logfile}"
+    fi

-if [ ${verbose} = true ]; then
-    inotify_qiet_flag=""
-else
-    inotify_qiet_flag=" -q -q "
-fi
+    if [ ${verbose} = true ]; then
+          inotify_qiet_flag=""
+    else
+        inotify_qiet_flag=" -q -q "
+    fi

-vlog "Arguments:"
-vlog "Snapshot directory: $snapshots"
-vlog "Timestift autodetection: $timeshift_auto"
-vlog "Logfile: $logfile"
+    if [ ${recursive} = true ]; then
+          inotify_recursive_flag=" -r "
+    else
+        inotify_recursive_flag=""
+    fi

-if ! [ -d "$snapshots" ] && ! [ ${timeshift_auto} = true ]; then
-    err "[!] No directory found at ${snapshots}" "${RED}" >&2
-    err "[!] Please specify a valid snapshot directory" "${RED}" >&2
-    exit 1
-fi
-
-if [ ${timeshift_auto} = true ]; then
-    watchtime=15
-    [ -d /run/timeshift ] || mkdir /run/timeshift
-else
-    watchtime=0
-fi
+    if [ ${timeshift_auto} = true ]; then
+          watchtime=15
+          [ -d /run/timeshift ] || mkdir /run/timeshift
+    else
+        watchtime=0
+    fi
+}

 create_grub_menu() {
    #  create the grub submenu of the whole grub menu, depending on wether the submenu already exists
    #  and gives feedback if it worked
-    if [ -s "${GRUB_BTRFS_GRUB_DIRNAME:-/boot/grub}/grub-btrfs.cfg" ]; then
-        if /etc/grub.d/41_snapshots-btrfs; then
-			log "Grub submenu recreated" "${GREEN}"
-        else
-			err "[!] Error during grub submenu creation (grub-btrfs error)" "${RED}"
-        fi
+    if grep "snapshots-btrfs" "{grub_directory}/grub.cfg"; then
+    	  if  /etc/grub.d/41_snapshots-btrfs; then
+		        log "Grub submenu recreated" "${GREEN}"
+          else
+		      err "[!] Error during grub submenu creation (grub-btrfs error)" "${RED}"
+          fi
    else
-        if ${GRUB_BTRFS_MKCONFIG:-grub-mkconfig} -o ${GRUB_BTRFS_GRUB_DIRNAME:-/boot/grub}/grub.cfg; then
-            log "Grub menu recreated" "${GREEN}"
-        else
-            err "[!] Error during grub menu creation (grub/ grub-btrfs error)" "${RED}"
-        fi
+        if ${GRUB_BTRFS_MKCONFIG:-grub-mkconfig} -o "${GRUB_BTRFS_GRUB_DIRNAME:-/boot/grub}"/grub.cfg; then
+		      log "Grub menu recreated" "${GREEN}"
+	    else
+		    err "[!] Error during grub menu creation (grub/ grub-btrfs error)" "${RED}"
+	    fi
    fi
 }

-# start the actual daemon
-vlog "Snapshot dir watchtimeout: $watchtime"
-vlog "Entering infinite while" "${GREEN}"
-while true; do
-    runs=false
-    if [ ${timeshift_auto} = true ] && ! [ "${timeshift_pid}" -gt 0 ] ; then
-        # watch the timeshift folder for a folder that is created when timeshift starts up
-        sleep 1 # for safety so the outer while is not going crazy
-        if [ "${timeshift_pid}" -eq -2 ]; then
-            log "detected timeshift shutdown"
-        fi
-        timeshift_pid=$(ps ax | awk '{sub(/.*\//, "", $5)} $5 ~ /timeshift/ {print $1}')
-        if [ "${#timeshift_pid}" -gt 0 ]; then
-            snapshots="/run/timeshift/${timeshift_pid}/backup/timeshift-btrfs/snapshots"
-            log "detected running Timeshift at daemon startup, PID is: $timeshift_pid"
-            vlog "new snapshots directory is $snapshots"
-        else
-            log "Watching /run/timeshift for timeshift to start"
-            inotifywait ${inotify_qiet_flag} -e create -e delete /run/timeshift && {
-                sleep 1
-                timeshift_pid=$(ps ax | awk '{sub(/.*\//, "", $5)} $5 ~ /timeshift/ {print $1}')
-                snapshots="/run/timeshift/${timeshift_pid}/backup/timeshift-btrfs/snapshots"
-                log "detected Timeshift startup, PID is: $timeshift_pid" "${CYAN}"
-                vlog "new snapshots directory is $snapshots" "${CYAN}"
-                (create_grub_menu) # create the grub menu once immidiatly in a forking process. Snapshots from commandline using timeshift --create need this
-            }
-        fi
-        runs=false
+set_snapshot_dir() {
+    # old timeshift has it's snapshot dir in a different location
+    if [ "${timeshift_old}" = true ]; then
+          snapdir="/run/timeshift/backup/timeshift-btrfs/snapshots"
    else
-        while [ -d "$snapshots" ]; do
-            # watch the actual snapshots folder for a new snapshot or a deletion of a snapshot
-            if [ ${runs} = false ] && [ ${verbose} = false ]; then
-                log "Watching $snapshots for new snapshots..." "${CYAN}"
-            else
-                vlog "Watching $snapshots for new snapshots..." "${CYAN}"
-            fi
-            runs=true
-            inotifywait ${inotify_qiet_flag}  -e create -e delete -e unmount -t "$watchtime" "$snapshots" && {
-                log "Detected snapshot creation/ deletion, recreating Grub menu" "${CYAN}"
-                sleep 5
-                create_grub_menu
-            }
-            sleep 1
-        done
-        timeshift_pid=-2
+        snapdir="/run/timeshift/${timeshift_pid}/backup/timeshift-btrfs/snapshots"
    fi
-    if ! [ ${timeshift_auto} = true ] && ! [ -d "${snapshots}" ] ; then # in case someone deletes the snapshots folder (in snapper mode) to prevent the while loop from going wild
-        break
-    fi
-done
+}

-exit 0 # tradition is tradition
+daemon_function() {
+    trap 'vlog "$BASHPID: Received SIGINT/ SIGTERM"; exit 0' SIGINT SIGTERM
+    # start the actual daemon
+    snapdir=$1
+    vlog "Subdaemon function started, PID: $BASHPID" "${GREEN}"
+    vlog "${BASHPID}: Entering infinite while for $snapdir" "${GREEN}"
+    vlog "${BASHPID}: Snapshot dir watchtimeout: $watchtime"
+    while true; do
+            runs=false
+            if [ ${timeshift_auto} = true ] && ! [ "${timeshift_pid}" -gt 0 ] ; then
+                  # watch the timeshift folder for a folder that is created when timeshift starts up
+                  sleep 1 # for safety so the outer while is not going crazy
+                  if [ "${timeshift_pid}" -eq -2 ]; then
+                        log "${BASHPID}: detected timeshift shutdown"
+                  fi
+                  timeshift_pid=$(ps ax | awk '{sub(/.*\//, "", $5)} $5 ~ /timeshift/ {print $1}')
+                  if [ "${#timeshift_pid}" -gt 0 ]; then
+                        set_snapshot_dir
+                        log "${BASHPID}: detected running Timeshift at daemon startup, PID is: $timeshift_pid"
+                        vlog "${BASHPID}: new snapshots directory is $snapdir"
+                  else
+                      log "Watching /run/timeshift for timeshift to start"
+                      inotifywait ${inotify_qiet_flag} -e create -e delete /run/timeshift && {
+                          sleep 1
+                          timeshift_pid=$(ps ax | awk '{sub(/.*\//, "", $5)} $5 ~ /timeshift/ {print $1}')
+                          set_snapshot_dir
+                          log "${BASHPID}: detected Timeshift startup, PID is: $timeshift_pid" "${CYAN}"
+                          vlog "${BASHPID}: new snapshots directory is $snapdir" "${CYAN}"
+                          (create_grub_menu) # create the grub menu once immidiatly in a forking process. Snapshots from commandline using timeshift --create need this
+                      }
+                  fi
+                  runs=false
+            else
+                while [ -d "$snapdir" ]; do
+                        # watch the actual snapshots folder for a new snapshot or a deletion of a snapshot
+                        if [ ${runs} = false ] && [ ${verbose} = false ]; then
+                              log "${BASHPID}: Watching $snapdir for new snapshots..." "${CYAN}"
+                        else
+                            vlog "${BASHPID}: Watching $snapdir for new snapshots..." "${CYAN}"
+                        fi
+                        runs=true
+                        inotifywait ${inotify_qiet_flag} ${inotify_recursive_flag} -e create -e delete -e unmount -t "$watchtime" "$snapdir" && {
+                            log "${BASHPID}: Detected snapshot creation/ deletion, recreating Grub menu" "${CYAN}"
+                            sleep 5
+                            create_grub_menu
+                        }
+                        sleep 1
+                done
+                timeshift_pid=-2
+            fi
+            if ! [ ${timeshift_auto} = true ] && ! [ -d "${snapdir}" ] ; then # in case someone deletes the snapshots folder (in snapper mode) to prevent the while loop from going wild
+                  break
+            fi
+    done
+}
+
+main() {
+    # init
+    timeshift_pid=-1
+    watchtime=0
+    logfile=0
+    snapshots=-1
+    timeshift_auto=false
+    timeshift_old=false
+    verbose=false
+    syslog=false
+    recursive=false
+    trap sighandler SIGINT SIGTERM
+
+    setcolors true # normally we want colors
+
+    sysconfdir="/etc"
+    grub_btrfs_config="${sysconfdir}/default/grub-btrfs/config"
+    # source config file
+    [ -f "$grub_btrfs_config" ] && . "$grub_btrfs_config"
+    [ -f "${sysconfdir}/default/grub" ] && . "${sysconfdir}/default/grub"
+
+    parse_arguments "${@}"
+    shift $(( OPTIND - 1 ))
+    snapdirs=( "${@}" )
+
+    vlog "Arguments:"
+    vlog "Snapshot directories: ${snapdirs[*]}"
+    vlog "Timestift autodetection: $timeshift_auto"
+    vlog "Timeshift old: $timeshift_old"
+    vlog "Logfile: $logfile"
+    vlog "Recursive: $recursive"
+
+    checks
+    setup
+
+    log  "grub-btrfsd starting up..." "${GREEN}"
+
+    if [ ${timeshift_auto} = true ] ; then
+          daemon_function "timeshift" &
+    else
+        # for all dirs that got passed to the script, start a new fork with that dir
+        for snapdir in "${snapdirs[@]}"
+            do
+                vlog "starting daemon watching $snapdir..."
+                daemon_function "${snapdir}" &
+        done
+    fi
+    wait # wait for forks to finish, kill child forks if SIGTERM is sent
+    exit 0
+}
+
+main "${@}"
--- a/grub-btrfsd.confd
+++ b/grub-btrfsd.confd
@@ -1,4 +1,4 @@
-# Copyright 2022 Pascal Jaeger
+# Copyright 2023 Pascal Jaeger
 # Distributed under the terms of the GNU General Public License v3

 ## Where to locate the root snapshots
@@ -6,13 +6,12 @@ snapshots="/.snapshots" # Snapper in the root directory
 #snapshots="/run/timeshift/backup/timeshift-btrfs/snapshots" # Timeshift < v22.06

 ## Optional arguments to run with the daemon
+# Append options to this like this:
+# optional_args="--syslog --timeshift-auto --verbose"
 # Possible options are:
 # -t, --timeshift-auto  Automatically detect Timeshifts snapshot directory for timeshift >= 22.06
+# -o, --timeshift-old   Look for snapshots in directory of Timeshift <v22.06 (requires --timeshift-auto)
 # -l, --log-file        Specify a logfile to write to
 # -v, --verbose         Let the log of the daemon be more verbose
 # -s, --syslog          Write to syslog
-# Uncomment the line to activate the option
-optional_args+="--syslog " # write to syslog by default
-#optional_args+="--timeshift-auto "
-#optional_args+="--log-file /var/log/grub-btrfsd.log "
-#optional_args+="--verbose "
+optional_args="--syslog"
--- a/grub-btrfsd.initd
+++ b/grub-btrfsd.initd
@@ -1,5 +1,5 @@
 #!/sbin/openrc-run
-# Copyright 2021 Pascal Jaeger
+# Copyright 2023 Pascal Jaeger
 # Distributed under the terms of the GNU General Public License v3

 name="grub-btrfs daemon"
--- a/grub-btrfsd.service
+++ b/grub-btrfsd.service
@@ -9,10 +9,11 @@ Environment="PATH=/sbin:/bin:/usr/sbin:/usr/bin"
 # Load environment variables from the configuration
 EnvironmentFile=/etc/default/grub-btrfs/config
 # Start the daemon, usage of it is:
-# grub-btrfsd [-h, --help] [-t, --timeshift-auto] [-l, --log-file LOG_FILE] SNAPSHOTS_DIR
-# SNAPSHOTS_DIR         Snapshot directory to watch, without effect when --timeshift-auto
+# grub-btrfsd [-h, --help] [-t, --timeshift-auto] [-l, --log-file LOG_FILE] SNAPSHOTS_DIRS
+# SNAPSHOTS_DIRS         Snapshot directories to watch, without effect when --timeshift-auto
 # Optional arguments:
 # -t, --timeshift-auto  Automatically detect Timeshifts snapshot directory
+# -o, --timeshift-old   Activate for timeshift versions <22.06
 # -l, --log-file        Specify a logfile to write to
 # -v, --verbose         Let the log of the daemon be more verbose
 # -s, --syslog          Write to syslog
--- a/initramfs/readme.md
+++ b/initramfs/readme.md
@@ -39,7 +39,11 @@ You notice that the name of the `hook` must match the name of the 2 installed fi
 Re-generate your initramfs  
 `mkinitcpio -P` (option -P means, all preset present in `/etc/mkinitcpio.d`)

+#### Dracut based distros
+Distributions that use Dracut to make their initramfs (many of the Fedora based Distros) simply have to pass either `rd.live.overlay.readonly=1` (to boot into the snapshot read only) or `rd.live.overlay.overlayfs=1` (to act like a livedisk, that is files can be changed but changes will be lost on the next boot) to their kernel command line in grub. 
+Grub-btrfs provides the variable `GRUB_BTRFS_SNAPSHOT_KERNEL_PARAMETERS` to add any command to the kernel command line. Set it to `GRUB_BTRFS_SNAPSHOT_KERNEL_PARAMETERS="rd.live.overlay.overlayfs=1"` to make snapshots immutable when booted into. 
+After changing this run `sudo /etc/grub.d/41_snapshots-btrfs` to generate a new snapshot-submenu with the parameter added. 
+
 #### Other distribution
-Refer to your distribution's documentation  
-or contribute to this project to add a paragraph.
+Refer to your distribution's documentation or contribute to this project to add a paragraph.
 #
--- a/manpages/grub-btrfs.8.man
+++ b/manpages/grub-btrfs.8.man
@@ -1,4 +1,4 @@
-.TH "grub-btrfs" "8"
+.TH "grub-btrfs" "8" 

 .SH "NAME"
 .PP
@@ -114,6 +114,17 @@ Example: \fCGRUB_BTRFS_NKERNEL=("kernel\-5.19.4\-custom" "vmlinux\-5.19.4\-custo
 \fCGRUB_BTRFS_NINIT=("initramfs\-5.19.4\-custom.img" "initrd\-5.19.4\-custom.img" "otherinit\-5.19.4\-custom.gz")\fP
 \fCGRUB_BTRFS_CUSTOM_MICROCODE=("custom\-ucode.img" "custom\-uc.img "custom_ucode.cpio")\fP

+.SS "\fCGRUB_BTRFS_SNAPSHOT_KERNEL_PARAMETERS\fP"
+.PP
+Additonal kernel command line parameters that should be passed to the kernelwhen
+booting a snapshot.
+For dracut based distros this could be useful to pass “rd.live.overlay.overlayfs=1”
+or “rd.live.overlay.readonly=1” to the Kernel for booting read only snapshots.
+.IP \(em 4
+Default: “”
+.IP \(em 4
+Example: \fCGRUB_BTRFS_SNAPSHOT_KERNEL_PARAMETERS="rd.live.overlay.overlayfs=1"\fP
+
 .SS "SNAPSHOT FILTERING"
 .SS "\fCGRUB_BTRFS_IGNORE_SPECIFIC_PATH\fP"
 .PP
@@ -168,7 +179,6 @@ Example: \fCGRUB_BTRFS_BOOT_DIRNAME="/"\fP
 .SS "\fCGRUB_BTRFS_GRUB_DIRNAME\fP"
 .PP
 Location of the folder containing the “grub.cfg” file.
-Used by grub-btrfs to save the file “grub-btrfs.cfg”.
 Might be grub2 on some systems.
 For example, on Fedora with EFI : “/boot/efi/EFI/fedora”
 .IP \(em 4
@@ -183,9 +193,9 @@ Some distributions (like OpenSuSE) store those file at the snapshot directory
 instead of boot. Be aware that this direcory must be available for grub during
 startup of the system.
 .IP \(em 4
-Default: “/boot/grub”
+Default: \fC$GRUB_BTRFS_GRUB_DIRNAME\fP
 .IP \(em 4
-Example GRUB\d\s-2BTRFS\s+2\u\d\s-2GBTRFS\s+2\u\d\s-2DIRNAME\s+2\u=“/boot/grub”
+Example: \fCGRUB_BTRFS_GBTRFS_DIRNAME="/.snapshots"\fP

 .SS "\fCGRUB_BTRFS_GBTRFS_SEARCH_DIRNAME\fP"
 .PP
@@ -202,8 +212,7 @@ NOTE: If variables of grub are used here like ${prefix}, they need to be escaped
 .PP
 with `$\` before the `$`
 .IP \(em 4
-Example: GRUB\d\s-2BTRFS\s+2\u\d\s-2GBTRFS\s+2\u\d\s-2SEARCH\s+2\u\d\s-2DIRNAME\s+2\u=“\${prefix}”
-
+Example: \fCGRUB_BTRFS_GBTRFS_SEARCH_DIRNAME="\${prefix}"\fP

 .SS "\fCGRUB_BTRFS_MKCONFIG\fP"
 .PP
@@ -243,7 +252,9 @@ and this comment \fIhttps://github.com/Antynea/grub-btrfs/issues/95#issuecomment
 Add authorized usernames separate by comma (userfoo,userbar).
 When Grub’s password protection is enabled, the superuser is authorized by default, it is not necessary to add it
 .IP \(em 4
-Default: “- Example: \fCGRUB_BTRFS_PROTECTION_AUTHORIZED_USERS="userfoo,userbar"\fP
+Default: “”
+.IP \(em 4
+Example: \fCGRUB_BTRFS_PROTECTION_AUTHORIZED_USERS="userfoo,userbar"\fP

 .SS "\fCGRUB_BTRFS_DISABLE_PROTECTION_SUBMENU\fP"
 .PP
--- a/manpages/grub-btrfs.8.org
+++ b/manpages/grub-btrfs.8.org
@@ -1,6 +1,6 @@
 #+title: grub-btrfs
 #+author: Pascal Jaeger
-#+man_class_option: :sectionid 8
+#+MAN_CLASS_OPTIONS: :section-id "8"

 * NAME
    grub-btrfs - Automatically add btrfs-Snapshots as a Grub submenu
@@ -83,6 +83,14 @@ Customs kernel, initramfs and microcodes that are not detected can be added in t
          ~GRUB_BTRFS_NINIT=("initramfs-5.19.4-custom.img" "initrd-5.19.4-custom.img" "otherinit-5.19.4-custom.gz")~
          ~GRUB_BTRFS_CUSTOM_MICROCODE=("custom-ucode.img" "custom-uc.img "custom_ucode.cpio")~

+*** ~GRUB_BTRFS_SNAPSHOT_KERNEL_PARAMETERS~
+Additonal kernel command line parameters that should be passed to the kernelwhen
+booting a snapshot.
+For dracut based distros this could be useful to pass "rd.live.overlay.overlayfs=1"
+or "rd.live.overlay.readonly=1" to the Kernel for booting read only snapshots.
+- Default: ""
+- Example: ~GRUB_BTRFS_SNAPSHOT_KERNEL_PARAMETERS="rd.live.overlay.overlayfs=1"~
+
 ** SNAPSHOT FILTERING

 *** ~GRUB_BTRFS_IGNORE_SPECIFIC_PATH~
@@ -123,7 +131,6 @@ Used by "grub-btrfs" to detect the boot partition and the location of kernels, i

 *** ~GRUB_BTRFS_GRUB_DIRNAME~
 Location of the folder containing the "grub.cfg" file.
-Used by grub-btrfs to save the file "grub-btrfs.cfg".
 Might be grub2 on some systems.
 For example, on Fedora with EFI : "/boot/efi/EFI/fedora"
 - Default: "/boot/grub"
@@ -134,8 +141,8 @@ For example, on Fedora with EFI : "/boot/efi/EFI/fedora"
 Some distributions (like OpenSuSE) store those file at the snapshot directory
 instead of boot. Be aware that this direcory must be available for grub during
 startup of the system.
- Default: "/boot/grub"
- Example GRUB_BTRFS_GBTRFS_DIRNAME="/boot/grub"
+- Default: ~$GRUB_BTRFS_GRUB_DIRNAME~
+- Example: ~GRUB_BTRFS_GBTRFS_DIRNAME="/.snapshots"~

 *** ~GRUB_BTRFS_GBTRFS_SEARCH_DIRNAME~
 Location of the directory where Grub searches for the grub-btrfs.cfg file.
@@ -146,11 +153,13 @@ startup of the system.
 installed. (like /boot/grub, /boot/efi/grub))
 - NOTE: If variables of grub are used here like ${prefix}, they need to be escaped
 with `\` before the `$`
- Example: GRUB_BTRFS_GBTRFS_SEARCH_DIRNAME="\${prefix}"
-
+- Example: ~GRUB_BTRFS_GBTRFS_SEARCH_DIRNAME="\${prefix}"~

 *** ~GRUB_BTRFS_MKCONFIG~
-Name/path of the command to generate the grub menu, used by "grub-btrfs.service"
+Name/path of the command to generate the grub menu, used by
+#+BEGIN_MAN
+.BR grub-btrfsd (8)
+#+END_MAN
 Might be 'grub2-mkconfig' on some systems (e.g. Fedora)
 Default paths are /sbin:/bin:/usr/sbin:/usr/bin, if your path is missing, report it on the upstream project.
 You can use the name of the command only or full the path.
@@ -177,7 +186,8 @@ Refer to the Grub documentation https://www.gnu.org/software/grub/manual/grub/gr
 and this comment https://github.com/Antynea/grub-btrfs/issues/95#issuecomment-682295660
 Add authorized usernames separate by comma (userfoo,userbar).
 When Grub's password protection is enabled, the superuser is authorized by default, it is not necessary to add it
- Default: "- Example: ~GRUB_BTRFS_PROTECTION_AUTHORIZED_USERS="userfoo,userbar"~
+- Default: ""
+- Example: ~GRUB_BTRFS_PROTECTION_AUTHORIZED_USERS="userfoo,userbar"~

 *** ~GRUB_BTRFS_DISABLE_PROTECTION_SUBMENU~
 Disable authentication support for submenu of Grub-btrfs only (--unrestricted)
--- a/manpages/grub-btrfsd.8.man
+++ b/manpages/grub-btrfsd.8.man
@@ -1,4 +1,4 @@
-.TH "grub-btrfsd" "8"
+.TH "grub-btrfsd" "8" 

 .SH "NAME"
 .PP
@@ -9,7 +9,7 @@ when a new btrfs snapshot is created.

 .SH "SYNOPSIS"
 .PP
-\fCgrub\-btrfsd [\-h, \-\-help] [\-c, \-\-no\-color] [\-l, \-\-log\-file LOG_FILE] [\-s, \-\-syslog] [\-t, \-\-timeshift\-auto] [\-v, \-\-verbose] SNAPSHOTS_DIR\fP
+\fCgrub\-btrfsd [\-h, \-\-help] [\-c, \-\-no\-color] [\-l, \-\-log\-file LOG_FILE] [\-r, \-\-recursive] [\-s, \-\-syslog] [\-t, \-\-timeshift\-auto] [\-o, \-\-timeshift\-old] [\-v, \-\-verbose] SNAPSHOTS_DIRS\fP

 .SH "DESCRIPTION"
 .PP
@@ -17,10 +17,11 @@ Grub-btrfsd is a shell script which is meant to be run as a daemon.
 Grub-btrfsd watches a directory where btrfs-snapshots are created or deleted via inotifywait and runs grub-mkconfig (if grub-mkconfig never ran before since grub-btrfs was installed) or \fC/etc/grub.d/41_snapshots\-btrfs\fP (when grub-mkconfig ran before with grub-btrfs installed) when something in that directory changes.

 .SH "OPTIONS"
-.SS "\fCSNAPSHOTS_DIR\fP"
+.SS "\fCSNAPSHOTS_DIRS\fP"
 .PP
-This argument specifies the path where grub-btrfsd looks for newly created snapshots and snapshot deletions. It is usually defined by the program used to make snapshots.
-E.g. for Snapper this would be \fC/.snapshots\fP
+This argument specifies the (space separated) paths where grub-btrfsd looks for newly created snapshots and snapshot deletions. It is usually defined by the program used to make snapshots.
+E.g. for Snapper this would be \fC/.snapshots\fP. It is possible to define more than one directory here, all directories will inherit the same settings (recursive etc.).
+This argument is not necessary to provide if \fC\-\-timeshift\-auto\fP is set.

 .SS "\fC\-c / \-\-no\-color\fP"
 .PP
@@ -30,13 +31,21 @@ Disable colors in output.
 .PP
 This arguments specifies a file where grub-btrfsd should write log messages.

+.SS "\fC\-r / \-\-recursive\fP"
+.PP
+Watch snapshot directory recursively
+
 .SS "\fC\-s / \-\-syslog\fP"
 .PP
 Write to syslog

 .SS "\fC\-t / \-\-timeshift\-auto\fP"
 .PP
-This is a flag to activate the auto detection of the path where Timeshift stores snapshots. Newer versions (>=22.06) of Timeshift mount their snapshots to \fC/run/timeshift/$PID/backup/timeshift\-btrfs\fP. Where \fC$PID\fP is the process ID of the currently running Timeshift session. The PID is changing every time Timeshift is opened. grub-btrfsd can automatically take care of the detection of the correct PID and directory if this flag is set. In this case the argument \fCSNAPSHOTS_DIR\fP has no effect.
+This is a flag to activate the auto detection of the path where Timeshift stores snapshots. Newer versions (>=22.06) of Timeshift mount their snapshots to \fC/run/timeshift/$PID/backup/timeshift\-btrfs\fP. Where \fC$PID\fP is the process ID of the currently running Timeshift session. The PID is changing every time Timeshift is opened. grub-btrfsd can automatically take care of the detection of the correct PID and directory if this flag is set. In this case the argument \fCSNAPSHOTS_DIRS\fP has no effect.
+
+.SS "\fC\-o / \-\-timeshift\-old\fP"
+.PP
+Look for snapshots in \fC/run/timeshift/backup/timeshift\-btrfs\fP instead of \fC/run/timeshift/$PID/backup/timeshift\-btrfs\fP. This is to be used for Timeshift versions <22.06.

 .SS "\fC\-v / \-\-verbose\fP"
 .PP
@@ -46,8 +55,6 @@ Let the log of the daemon be more verbose
 .PP
 Displays a short help message.

-
-
 .SH "CONFIGURATION"
 .PP
 The daemon is usually configured via the file \fC/etc/conf.d/grub\-btrfsd\fP on openrc-init systems and \fCsudo systemctl edit \-\-full grub\-btrfsd\fP on systemd systems. In this file the arguments (See OPTIONS), that OpenRC passes to the daemon when it is started, can be configured.
--- a/manpages/grub-btrfsd.8.org
+++ b/manpages/grub-btrfsd.8.org
@@ -1,6 +1,6 @@
 #+title: grub-btrfsd
 #+author: Pascal Jaeger
-#+man_class_option: :sectionid 8
+#+MAN_CLASS_OPTIONS: :section-id "8"

 * NAME
 grub-btrfsd - An OpenRC daemon to automatically update the grub menu with
@@ -10,16 +10,17 @@ grub-btrfsd - An OpenRC daemon to automatically update the grub menu with
 when a new btrfs snapshot is created.

 * SYNOPSIS
-~grub-btrfsd [-h, --help] [-c, --no-color] [-l, --log-file LOG_FILE] [-s, --syslog] [-t, --timeshift-auto] [-v, --verbose] SNAPSHOTS_DIR~
+~grub-btrfsd [-h, --help] [-c, --no-color] [-l, --log-file LOG_FILE] [-r, --recursive] [-s, --syslog] [-t, --timeshift-auto] [-o, --timeshift-old] [-v, --verbose] SNAPSHOTS_DIRS~

 * DESCRIPTION
 Grub-btrfsd is a shell script which is meant to be run as a daemon.
 Grub-btrfsd watches a directory where btrfs-snapshots are created or deleted via inotifywait and runs grub-mkconfig (if grub-mkconfig never ran before since grub-btrfs was installed) or ~/etc/grub.d/41_snapshots-btrfs~ (when grub-mkconfig ran before with grub-btrfs installed) when something in that directory changes.

 * OPTIONS
-** ~SNAPSHOTS_DIR~
-This argument specifies the path where grub-btrfsd looks for newly created snapshots and snapshot deletions. It is usually defined by the program used to make snapshots.
-E.g. for Snapper this would be ~/.snapshots~
+** ~SNAPSHOTS_DIRS~
+This argument specifies the (space separated) paths where grub-btrfsd looks for newly created snapshots and snapshot deletions. It is usually defined by the program used to make snapshots.
+E.g. for Snapper this would be ~/.snapshots~. It is possible to define more than one directory here, all directories will inherit the same settings (recursive etc.).
+This argument is not necessary to provide if ~--timeshift-auto~ is set.

 ** ~-c / --no-color~
 Disable colors in output.
@@ -27,11 +28,17 @@ Disable colors in output.
 ** ~-l / --log-file~
 This arguments specifies a file where grub-btrfsd should write log messages.

+** ~-r / --recursive~
+Watch snapshot directory recursively
+
 ** ~-s / --syslog~
 Write to syslog

 ** ~-t / --timeshift-auto~
-This is a flag to activate the auto detection of the path where Timeshift stores snapshots. Newer versions (>=22.06) of Timeshift mount their snapshots to ~/run/timeshift/$PID/backup/timeshift-btrfs~. Where ~$PID~ is the process ID of the currently running Timeshift session. The PID is changing every time Timeshift is opened. grub-btrfsd can automatically take care of the detection of the correct PID and directory if this flag is set. In this case the argument ~SNAPSHOTS_DIR~ has no effect.
+This is a flag to activate the auto detection of the path where Timeshift stores snapshots. Newer versions (>=22.06) of Timeshift mount their snapshots to ~/run/timeshift/$PID/backup/timeshift-btrfs~. Where ~$PID~ is the process ID of the currently running Timeshift session. The PID is changing every time Timeshift is opened. grub-btrfsd can automatically take care of the detection of the correct PID and directory if this flag is set. In this case the argument ~SNAPSHOTS_DIRS~ has no effect.
+
+** ~-o / --timeshift-old~
+Look for snapshots in ~/run/timeshift/backup/timeshift-btrfs~ instead of ~/run/timeshift/$PID/backup/timeshift-btrfs~. This is to be used for Timeshift versions <22.06.

 ** ~-v / --verbose~
 Let the log of the daemon be more verbose
@@ -39,8 +46,6 @@ Let the log of the daemon be more verbose
 ** ~-h / --help~
 Displays a short help message.

-
-
 * CONFIGURATION
 The daemon is usually configured via the file ~/etc/conf.d/grub-btrfsd~ on openrc-init systems and ~sudo systemctl edit --full grub-btrfsd~ on systemd systems. In this file the arguments (See OPTIONS), that OpenRC passes to the daemon when it is started, can be configured.

--- a/temp/grub-btrfs.8
+++ b/temp/grub-btrfs.8
@@ -0,0 +1,280 @@
+.TH "grub-btrfs" "8" 
+
+.SH "NAME"
+.PP
+grub-btrfs - Automatically add btrfs-Snapshots as a Grub submenu
+
+.SH "SYNOPSIS"
+.PP
+\fC/etc/grub.d/41_snapshots\-btrfs [\-V, \-\-version]\fP
+
+.SH "DESCRIPTION"
+.PP
+Improves grub by adding “btrfs snapshots” to the grub menu.
+
+.PP
+You can boot your system on a “snapshot” from the grub menu.
+Supports manual snapshots, snapper and timeshift.
+Features of grub-btrfs:
+.IP \(em 4
+Automatically list snapshots existing on root partition (btrfs).
+.IP \(em 4
+Automatically detect if /boot is in separate partition.
+.IP \(em 4
+Automatically detect kernel, initramfs and intel/amd microcode in /boot directory on snapshots.
+.IP \(em 4
+Automatically create corresponding “menuentry” in grub.cfg
+.IP \(em 4
+Automatically detect the type/tags and descriptions/comments of snapper/timeshift snapshots.
+.IP \(em 4
+Automatically generate grub.cfg if you use the provided systemd service.
+
+.SH "CONFIGURATION"
+.PP
+grub-btrfs is configured via the file \fC/etc/default/grub\-btrfs/config\fP.
+Possible options are:
+
+.SS "GENERAL"
+.SS "\fCGRUB_BTRFS_DISABLE\fP"
+.PP
+Disable grub-btrfs if true.
+.IP \(em 4
+Default: “false”
+.IP \(em 4
+Example: \fCGRUB_BTRFS_DISABLE="true"\fP
+
+.SS "\fCGRUB_BTRFS_TITLE_FORMAT\fP"
+.PP
+The snapshot entries submenu in Grub are added according to this line. It is possible to change to order of the fields.
+.IP \(em 4
+Default: (“date” “snapshot” “type” “description”)
+.IP \(em 4
+Example: \fCGRUB_BTRFS_TITLE_FORMAT=("date" "snapshot" "type" "description")\fP
+
+.SS "\fCGRUB_BTRFS_LIMIT\fP"
+.PP
+Maximum number of snapshots in the GRUB snapshots sub menu.
+.IP \(em 4
+Default: “50”
+.IP \(em 4
+Example: \fCGRUB_BTRFS_LIMIT="50"\fP
+
+.SS "\fCGRUB_BTRFS_SUBVOLUME_SORT\fP"
+.PP
+Sort the found subvolumes by “ogeneration” or “generation” or “path” or “rootid”.
+.IP \(em 4
+See Sorting section in
+.BR btrfs-subvolume (8)
+.PP
+“-rootid” means list snapshot by new ones first.
+.IP \(em 4
+Default: “-rootid”
+.IP \(em 4
+Example: \fCGRUB_BTRFS_SUBVOLUME_SORT="+ogen,\-gen,path,rootid"\fP
+
+.SS "\fCGRUB_BTRFS_SHOW_SNAPSHOTS_FOUND\fP"
+.PP
+Show snapshots found during run “grub-mkconfig”
+.IP \(em 4
+Default: “true”
+.IP \(em 4
+Example: \fCGRUB_BTRFS_SHOW_SNAPSHOTS_FOUND="false"\fP
+
+.SS "\fCGRUB_BTRFS_ROOTFLAGS\fP"
+.PP
+Comma seperated mount options to be used when booting a snapshot.
+They can be defined here as well as in the “/” line inside the respective snapshots’
+“/etc/fstab” files.  Mount options found in both places are combined, and this variable
+takes priority over `fstab` entries.
+NB: Do NOT include “subvol=...” or “subvolid=...” here.
+.IP \(em 4
+Default: “”
+.IP \(em 4
+Example: \fCGRUB_BTRFS_ROOTFLAGS="space_cache,commit=10,norecovery"\fP
+
+.SS "\fCGRUB_BTRFS_OVERRIDE_BOOT_PARTITION_DETECTION\fP"
+.PP
+By default “grub-btrfs” automatically detects your boot partition,
+either located at the system root or on a separate partition or in a subvolume,
+Change to “true” if your boot partition is not detected as separate.
+.IP \(em 4
+Default: “false”
+.IP \(em 4
+Example: \fCGRUB_BTRFS_OVERRIDE_BOOT_PARTITION_DETECTION="true"\fP
+
+.SS "CUSTOM KERNELS"
+.SS "\fCGRUB_BTRFS_NKERNEL\fP / \fCGRUB_BTRFS_NINIT\fP / \fCGRUB_BTRFS_CUSTOM_MICROCODE\fP"
+.PP
+By default, “grub-btrfs” automatically detects most existing kernels, initramfs and microcode.
+Customs kernel, initramfs and microcodes that are not detected can be added in these variables.
+.IP \(em 4
+Default: (“”)
+.IP \(em 4
+Example: \fCGRUB_BTRFS_NKERNEL=("kernel\-5.19.4\-custom" "vmlinux\-5.19.4\-custom")\fP
+\fCGRUB_BTRFS_NINIT=("initramfs\-5.19.4\-custom.img" "initrd\-5.19.4\-custom.img" "otherinit\-5.19.4\-custom.gz")\fP
+\fCGRUB_BTRFS_CUSTOM_MICROCODE=("custom\-ucode.img" "custom\-uc.img "custom_ucode.cpio")\fP
+
+.SS "\fCGRUB_BTRFS_SNAPSHOT_KERNEL_PARAMETERS\fP"
+.PP
+Additonal kernel command line parameters that should be passed to the kernelwhen
+booting a snapshot.
+For dracut based distros this could be useful to pass “rd.live.overlay.overlayfs=1”
+or “rd.live.overlay.readonly=1” to the Kernel for booting read only snapshots.
+.IP \(em 4
+Default: “”
+.IP \(em 4
+Example: \fCGRUB_BTRFS_SNAPSHOT_KERNEL_PARAMETERS="rd.live.overlay.overlayfs=1"\fP
+
+.SS "SNAPSHOT FILTERING"
+.SS "\fCGRUB_BTRFS_IGNORE_SPECIFIC_PATH\fP"
+.PP
+Ignore specific path during run “grub-mkconfig”.
+Only exact paths are ignored.
+e.g : if `specific path` = @, only `@` snapshot will be ignored.
+.IP \(em 4
+Default: (“@”)
+.IP \(em 4
+Example: \fCGRUB_BTRFS_IGNORE_SPECIFIC_PATH=("@home")\fP
+
+.SS "\fCGRUB_BTRFS_IGNORE_PREFIX_PATH\fP"
+.PP
+Ignore prefix path during run “grub-mkconfig”.
+Any path starting with the specified string will be ignored.
+e.g : if `prefix path` = @, all snapshots beginning with “@/...” will be ignored.
+.IP \(em 4
+Default: (“var/lib/docker” “@var/lib/docker” “@/var/lib/docker”)
+.IP \(em 4
+Example: \fCGRUB_BTRFS_IGNORE_PREFIX_PATH=("var/lib/docker" "@var/lib/docker" "@/var/lib/docker")\fP
+
+.SS "\fCGRUB_BTRFS_IGNORE_SNAPSHOT_TYPE\fP"
+.PP
+Ignore specific type/tag of snapshot during run “grub-mkconfig”.
+For snapper:
+Type = single, pre, post.
+For Timeshift:
+Tag = boot, ondemand, hourly, daily, weekly, monthly.
+.IP \(em 4
+Default: (“”)
+.IP \(em 4
+Example: \fCGRUB_BTRFS_IGNORE_SNAPSHOT_TYPE=("ondemand")\fP
+
+.SS "\fCGRUB_BTRFS_IGNORE_SNAPSHOT_DESCRIPTION\fP"
+.PP
+Ignore specific description of snapshot during run “grub-mkconfig”.
+.IP \(em 4
+Default: (“”)
+.IP \(em 4
+Example: \fCGRUB_BTRFS_IGNORE_SNAPSHOT_DESCRIPTION=("timeline")\fP
+
+.SS "DISTRIBUTION DEPENDENT SETTINGS"
+.SS "\fCGRUB_BTRFS_BOOT_DIRNAME\fP"
+.PP
+Location of kernels/initramfs/microcode.
+Used by “grub-btrfs” to detect the boot partition and the location of kernels, initramfs and microcodes.
+.IP \(em 4
+Default: “/boot”
+.IP \(em 4
+Example: \fCGRUB_BTRFS_BOOT_DIRNAME="/"\fP
+
+.SS "\fCGRUB_BTRFS_GRUB_DIRNAME\fP"
+.PP
+Location of the folder containing the “grub.cfg” file.
+Might be grub2 on some systems.
+For example, on Fedora with EFI : “/boot/efi/EFI/fedora”
+.IP \(em 4
+Default: “/boot/grub”
+.IP \(em 4
+Example: \fCGRUB_BTRFS_GRUB_DIRNAME="/boot/grub2"\fP
+
+.SS "\fCGRUB_BTRFS_GBTRFS_DIRNAME\fP"
+.PP
+Location where grub-btrfs.cfg should be saved.
+Some distributions (like OpenSuSE) store those file at the snapshot directory
+instead of boot. Be aware that this direcory must be available for grub during
+startup of the system.
+.IP \(em 4
+Default: \fC$GRUB_BTRFS_GRUB_DIRNAME\fP
+.IP \(em 4
+Example: \fCGRUB_BTRFS_GBTRFS_DIRNAME="/.snapshots"\fP
+
+.SS "\fCGRUB_BTRFS_GBTRFS_SEARCH_DIRNAME\fP"
+.PP
+Location of the directory where Grub searches for the grub-btrfs.cfg file.
+Some distributions (like OpenSuSE) store those file at the snapshot directory
+instead of boot. Be aware that this direcory must be available for grub during
+startup of the system.
+.IP \(em 4
+Default: “\${prefix}” (This is a grub variable that resolves to where grub is
+.PP
+installed. (like /boot/grub, /boot/efi/grub))
+.IP \(em 4
+NOTE: If variables of grub are used here like ${prefix}, they need to be escaped
+.PP
+with `$\` before the `$`
+.IP \(em 4
+Example: \fCGRUB_BTRFS_GBTRFS_SEARCH_DIRNAME="\${prefix}"\fP
+
+.SS "\fCGRUB_BTRFS_MKCONFIG\fP"
+.PP
+Name/path of the command to generate the grub menu, used by “grub-btrfs.service”
+Might be ’grub2-mkconfig’ on some systems (e.g. Fedora)
+Default paths are /sbin:/bin:/usr/sbin:/usr/bin, if your path is missing, report it on the upstream project.
+You can use the name of the command only or full the path.
+.IP \(em 4
+Default: grub-mkconfig
+.IP \(em 4
+Example: \fCGRUB_BTRFS_MKCONFIG=/sbin/grub2\-mkconfig\fP
+
+.SS "\fCGRUB_BTRFS_SCRIPT_CHECK\fP"
+.PP
+Name of grub-script-check command, used by “grub-btrfs”
+Might be ’grub2-script-check’ on some systems (e.g. Fedora)
+.IP \(em 4
+Default: grub-script-check
+.IP \(em 4
+Example: \fCGRUB_BTRFS_SCRIPT_CHECK=grub2\-script\-check\fP
+
+.SS "\fCGRUB_BTRFS_MKCONFIG_LIB\fP"
+.PP
+Path of grub-mkconfig\d\s-2lib\s+2\u file, used by “grub-btrfs”
+Might be ’/usr/share/grub2/grub-mkconfig\d\s-2lib\s+2\u’ on some systems (e.g. Opensuse)
+.IP \(em 4
+Default: /usr/share/grub/grub-mkconfig\d\s-2lib\s+2\u
+.IP \(em 4
+Example: \fCGRUB_BTRFS_MKCONFIG_LIB=/usr/share/grub2/grub\-mkconfig_lib\fP
+
+.SS "SECURITY"
+.SS "\fCGRUB_BTRFS_PROTECTION_AUTHORIZED_USERS\fP"
+.PP
+Password protection management for submenu, snapshots
+Refer to the Grub documentation \fIhttps://www.gnu.org/software/grub/manual/grub/grub.html#Authentication-and-authorisation\fP
+and this comment \fIhttps://github.com/Antynea/grub-btrfs/issues/95#issuecomment-682295660\fP
+Add authorized usernames separate by comma (userfoo,userbar).
+When Grub’s password protection is enabled, the superuser is authorized by default, it is not necessary to add it
+.IP \(em 4
+Default: “”
+.IP \(em 4
+Example: \fCGRUB_BTRFS_PROTECTION_AUTHORIZED_USERS="userfoo,userbar"\fP
+
+.SS "\fCGRUB_BTRFS_DISABLE_PROTECTION_SUBMENU\fP"
+.PP
+Disable authentication support for submenu of Grub-btrfs only (--unrestricted)
+does not work if GRUB\d\s-2BTRFS\s+2\u\d\s-2PROTECTION\s+2\u\d\s-2AUTHORIZED\s+2\u\d\s-2USERS\s+2\u is not empty
+.IP \(em 4
+Default: “false”
+.IP \(em 4
+Example: \fCGRUB_BTRFS_DISABLE_PROTECTION_SUBMENU="true"\fP
+
+.SH "FILES"
+.PP
+/etc/default/grub-btrfs/config
+
+.SH "SEE ALSO"
+.IR btrfs (8)
+.IR btrfs-subvolume (8)
+.IR grub-btrfsd (8)
+.IR grub-mkconfig (8)
+
+.SH "COPYRIGHT"
+.PP
+Copyright (c) 2022 Pascal Jäger
--- a/temp/grub-btrfsd.8
+++ b/temp/grub-btrfsd.8
@@ -0,0 +1,84 @@
+.TH "grub-btrfsd" "8" 
+
+.SH "NAME"
+.PP
+grub-btrfsd - An OpenRC daemon to automatically update the grub menu with
+.BR grub-btrfs (8)
+.PP
+when a new btrfs snapshot is created.
+
+.SH "SYNOPSIS"
+.PP
+\fCgrub\-btrfsd [\-h, \-\-help] [\-c, \-\-no\-color] [\-l, \-\-log\-file LOG_FILE] [\-r, \-\-recursive] [\-s, \-\-syslog] [\-t, \-\-timeshift\-auto] [\-o, \-\-timeshift\-old] [\-v, \-\-verbose] SNAPSHOTS_DIRS\fP
+
+.SH "DESCRIPTION"
+.PP
+Grub-btrfsd is a shell script which is meant to be run as a daemon.
+Grub-btrfsd watches a directory where btrfs-snapshots are created or deleted via inotifywait and runs grub-mkconfig (if grub-mkconfig never ran before since grub-btrfs was installed) or \fC/etc/grub.d/41_snapshots\-btrfs\fP (when grub-mkconfig ran before with grub-btrfs installed) when something in that directory changes.
+
+.SH "OPTIONS"
+.SS "\fCSNAPSHOTS_DIRS\fP"
+.PP
+This argument specifies the (space separated) paths where grub-btrfsd looks for newly created snapshots and snapshot deletions. It is usually defined by the program used to make snapshots.
+E.g. for Snapper this would be \fC/.snapshots\fP. It is possible to define more than one directory here, all directories will inherit the same settings (recursive etc.).
+This argument is not necessary to provide if \fC\-\-timeshift\-auto\fP is set.
+
+.SS "\fC\-c / \-\-no\-color\fP"
+.PP
+Disable colors in output.
+
+.SS "\fC\-l / \-\-log\-file\fP"
+.PP
+This arguments specifies a file where grub-btrfsd should write log messages.
+
+.SS "\fC\-r / \-\-recursive\fP"
+.PP
+Watch snapshot directory recursively
+
+.SS "\fC\-s / \-\-syslog\fP"
+.PP
+Write to syslog
+
+.SS "\fC\-t / \-\-timeshift\-auto\fP"
+.PP
+This is a flag to activate the auto detection of the path where Timeshift stores snapshots. Newer versions (>=22.06) of Timeshift mount their snapshots to \fC/run/timeshift/$PID/backup/timeshift\-btrfs\fP. Where \fC$PID\fP is the process ID of the currently running Timeshift session. The PID is changing every time Timeshift is opened. grub-btrfsd can automatically take care of the detection of the correct PID and directory if this flag is set. In this case the argument \fCSNAPSHOTS_DIRS\fP has no effect.
+
+.SS "\fC\-o / \-\-timeshift\-old\fP"
+.PP
+Look for snapshots in \fC/run/timeshift/backup/timeshift\-btrfs\fP instead of \fC/run/timeshift/$PID/backup/timeshift\-btrfs\fP. This is to be used for Timeshift versions <22.06.
+
+.SS "\fC\-v / \-\-verbose\fP"
+.PP
+Let the log of the daemon be more verbose
+
+.SS "\fC\-h / \-\-help\fP"
+.PP
+Displays a short help message.
+
+.SH "CONFIGURATION"
+.PP
+The daemon is usually configured via the file \fC/etc/conf.d/grub\-btrfsd\fP on openrc-init systems and \fCsudo systemctl edit \-\-full grub\-btrfsd\fP on systemd systems. In this file the arguments (See OPTIONS), that OpenRC passes to the daemon when it is started, can be configured.
+
+.SS "NOTES"
+.PP
+A common configuration for Snapper would be to set \fCSNAPSHOTS_DIR\fP to \fC/.snapshots\fP and not to set \fC\-\-timeshift\-auto\fP.
+For Timeshift \fC\-\-timeshift\-auto\fP is set to true and \fCSNAPSHOTS_DIR\fP can be left as is.
+
+.SH "FILES"
+.PP
+\fC/etc/conf.d/grub\-btrfsd\fP
+\fC/usr/lib/systemd/system/grub\-btrfsd.service\fP
+
+.SH "SEE ALSO"
+.IR btrfs (8)
+.IR btrfs-subvolume (8)
+.IR grub-btrfsd (8)
+.IR grub-mkconfig (8)
+.IR inotifywait (1)
+.IR openrc (8)
+.IR rc-service (8)
+.IR timeshift (1)
+
+.SH "COPYRIGHT"
+.PP
+Copyright (c) 2022 Pascal Jäger
Author	SHA1	Message	Date
Pascal J	ade5a91d55	fix #285 (#287 )	2023-06-05 08:55:44 +02:00
Pascal Jäger	9a8a1b7d50	fix #278 Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2023-04-28 18:26:25 +02:00
Pascal J	d51c96433c	Remove openrc instructions for updating at system boot/ shutdown	2023-04-13 10:54:03 +02:00
Dan MacDonald	f461ea9cf1	More improvements to the README (#276 ) * More improvements to the README * Fix typo in README * Adjust README according to Pascal's advice	2023-04-13 10:52:24 +02:00
Dan MacDonald	85571aab62	Correct first sentence of README	2023-04-11 08:52:34 +02:00
Dan MacDonald	2bbfddc46a	Several edits and tweaks to the README	2023-04-11 08:52:34 +02:00
Pascal Jäger	3ce858f18d	grub-btrfsd: refactor whole script Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2023-04-05 18:05:29 +02:00
Pascal Jäger	dd96f22888	grub-btrfsd: Check if all dirs exist Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2023-04-05 17:26:58 +02:00
Pascal Jäger	35429e02a4	grub-btrfsd: Kill process group on SIGTERM/ SIGINT Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2023-04-05 17:10:49 +02:00
Pascal Jäger	04958d6e0b	grub-btrfsd: Start subdaemon when --timeshift-auto Fix #272 Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2023-04-05 17:09:30 +02:00
Pascal Jäger	c6550d0d96	grub-btrfs: unquote snap variable Fix #273 Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2023-04-05 13:40:40 +02:00
Pascal Jäger	c7d4bbbe45	Makefile: don't delete temp dir after installation Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2023-03-26 21:50:48 +02:00
Pascal Jäger	09a2a55ee4	Makefile: make docs installation optional Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2023-03-26 21:39:51 +02:00
Pascal Jäger	8105a2edf7	grub-btrfsd: watch more than one snapshot dir Fix #262 Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2023-03-26 21:08:16 +02:00
Pascal Jäger	879bec3697	grub-btrfsd: watch snapshots directory recursively Fix: #262 Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2023-03-26 20:44:50 +02:00
Pascal Jäger	e2937f6bff	grub-btrfs: update comments Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2023-03-26 19:46:23 +02:00
Pascal Jäger	ec5ff8b4bc	grub-btrfs: get back the grub_btrfs_search_directory functionality Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2023-03-26 19:46:05 +02:00
Pascal Jäger	1556c345da	grub-btrfs: Do root fs detection with btrfs progs Fix: #266 #255 Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2023-03-26 19:44:56 +02:00
Pascal Jäger	8028a4376a	grub-btrfsd: change condition to run script Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2023-03-26 18:56:35 +02:00
Pascal Jäger	0745117a76	Makefile: add variable GRUB_UPDATE_EXCLUDE Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2023-03-26 18:56:35 +02:00
Kevin Chevreuil - Kaisen	2032502e09	Makefile: add an if statement for RHEL distribs based	2023-03-26 18:56:35 +02:00
Kevin Chevreuil - Kaisen	1d53472569	41_snapshots-btrfs: Create a bkp file. Delete the .new when no snapshots found.	2023-03-26 18:56:35 +02:00
Kevin Chevreuil - Kaisen	8ea8046887	Update the Makefile	2023-03-26 18:56:35 +02:00
Kevin Chevreuil - Kaisen	7586639f48	Auto execute the grub-mkconfig command at the installation	2023-03-26 18:56:35 +02:00
Kevin Chevreuil - Kaisen	5ce2dfa640	Only recreation of the submenu	2023-03-26 18:56:35 +02:00
Kevin Chevreuil - Kaisen	44c9cd16d0	Dynamic GRUB entry	2023-03-26 18:56:35 +02:00
Kevin Chevreuil - Kaisen	934a4a38e6	Force the deletion of the grub-btrfs.cfg file	2023-03-26 18:56:35 +02:00
Pascal J	87f030f6e8	Merge pull request #245 from Antynea/improve-config Add kernel command line for snapshots as config parameter	2023-01-22 20:10:16 +01:00
Pascal J	1d33404c78	Merge branch 'master' into improve-config	2023-01-22 20:07:54 +01:00
Pascal Jäger	89ef805e81	grub-btrfsd: do no append with += to optional args This does not work anymore, but it should be similar to the systemd service file anyway, where things are just written in one line. Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2022-12-10 22:20:15 +01:00
Pascal Jäger	e03e87dd64	grub-btrfsd: Use bash as interpreter Fix: #248 Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2022-12-07 15:01:10 +01:00
Pascal Jäger	f131c38300	manpages: correct some minor things Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2022-12-06 23:10:24 +01:00
Pascal Jäger	934ab213b0	grub-btrfs: add custom kernel parameters option for snapshots Fix #214, #160 Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2022-12-06 22:56:44 +01:00
Pascal Jäger	f0ed56d242	grub-btrfs: Improve variable defaults Fix #244 Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2022-12-06 22:55:51 +01:00
Pascal Jäger	29ec43e9a6	grub-btrfsd: Fix non POSIX redirect Squashed commit of the following: commit `d75feb59f4` Author: Pascal J <pascal.jaeger@leimstift.de> Date: Sun Dec 4 22:07:01 2022 +0100 grub-btrsd: update shebang commit `a64379789c` Author: Pavin Joseph <pavinjosdev@gmail.com> Date: Sun Dec 4 22:52:31 2022 +0530 Update grub-btrfsd commit `fe42568785` Author: Pavin Joseph <pavinjosdev@gmail.com> Date: Sun Dec 4 04:07:05 2022 +0530 Update grub-btrfsd Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2022-12-04 22:11:00 +01:00
Kevin Chevreuil - Kaisen	6980771cd2	Don't display warnings when the mount command is used	2022-11-29 14:47:18 +01:00
Pascal Jäger	bc167ffe00	Readme: added instructions for --timeshift-old Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2022-11-26 17:59:38 +01:00
Pascal Jäger	b661e4e03f	Merge branch 'fix-snap-dir-check'	2022-11-26 17:46:45 +01:00
Pascal Jäger	f594a56232	Merge branch 'improve-version-generation'	2022-11-26 17:44:06 +01:00
Pascal Jäger	fe48642596	Merge branch 'make-prefix-configurable'	2022-11-26 17:38:15 +01:00
Pascal Jäger	e3d0792a74	Post release version bump Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2022-11-26 15:10:28 +01:00
Pascal Jäger	efc4657aab	grub-btrfsd: fixed message about flag dependencies Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2022-11-26 15:06:44 +01:00
Pascal Jäger	9e34f53ef8	Readme: discribe new version generation Fix #237 Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2022-11-26 15:03:10 +01:00
Pascal Jäger	6f154329c7	grub-btrfsd: fix if...else in daemon add description of feature in manpage fix non sh compatible commands in daemon Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2022-11-26 10:06:19 +01:00
Pascal Jäger	4942989d7f	grub-btrfsd: add flag or old timeshift Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2022-11-25 16:58:07 +01:00
Pascal Jäger	91c4aac82c	grub-btrfsd: make dir check of snapshots dir a warning Bug #234 Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>	2022-11-25 08:52:49 +01:00