grub-btrfsd: fixed message about flag dependencies

Signed-off-by: Pascal Jäger <pascal.jaeger@leimstift.de>

config

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-GRUB_BTRFS_VERSION=4.12-20221123
+GRUB_BTRFS_VERSION=4.12-fix-snap-dir-check-2022-11-26T14:06:44+00:00
 
 # Disable grub-btrfs.
 # Default: "false"

grub-btrfsd

@@ -9,6 +9,7 @@ watchtime=0
 logfile=0
 snapshots=-1
 timeshift_auto=false
+timeshift_old=false
 verbose=false
 syslog=false
 
@@ -31,8 +32,8 @@ 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" ]] && . "${sysconfdir}/default/grub"
+[ -f "$grub_btrfs_config" ] && . "$grub_btrfs_config"
+[ -f "${sysconfdir}/default/grub" ] && . "${sysconfdir}/default/grub"
 
 print_help() {
             echo "${CYAN}[?] Usage:"
@@ -44,6 +45,7 @@ print_help() {
             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 "-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"
@@ -97,6 +99,9 @@ while getopts :l:ctvsh-: opt; do
                 timeshift-auto)
                     timeshift_auto=true
                     ;;
+                timeshift-old)
+                    timeshift_old=true
+                    ;;
                 verbose)
                     verbose=true
                     ;;
@@ -125,6 +130,9 @@ while getopts :l:ctvsh-: opt; do
         t)
             timeshift_auto=true
             ;;
+        o)
+            timeshift_old=true
+            ;;
         v)
             verbose=true
             ;;
@@ -168,9 +176,15 @@ else
     inotify_qiet_flag=" -q -q "
 fi
 
+if [ ${timeshift_auto} = false ] && [ ${timeshift_old} = true ]; then
+    err "[!] Flag --timeshift-old requires flag --timeshift-auto" "${RED}" >&2
+    exit 1
+fi
+
 vlog "Arguments:"
 vlog "Snapshot directory: $snapshots"
 vlog "Timestift autodetection: $timeshift_auto"
+vlog "Timeshift old: $timeshift_old"
 vlog "Logfile: $logfile"
 
 if ! [ -d "$snapshots" ] && ! [ ${timeshift_auto} = true ]; then
@@ -204,6 +218,15 @@ create_grub_menu() {
     fi
 }
 
+set_snapshot_dir() {
+    # old timeshift has it's snapshot dir in a different location
+    if [ "${timeshift_old}" = true ]; then
+          snapshots="/run/timeshift/backup/timeshift-btrfs/snapshots"
+    else
+          snapshots="/run/timeshift/${timeshift_pid}/backup/timeshift-btrfs/snapshots"
+    fi
+}
+
 # start the actual daemon
 vlog "Snapshot dir watchtimeout: $watchtime"
 vlog "Entering infinite while" "${GREEN}"
@@ -217,7 +240,7 @@ while true; do
         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"
+            set_snapshot_dir
             log "detected running Timeshift at daemon startup, PID is: $timeshift_pid"
             vlog "new snapshots directory is $snapshots"
         else
@@ -225,7 +248,7 @@ while true; do
             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"
+                set_snapshot_dir
                 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

manpages/grub-btrfsd.8.man

@@ -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] [\-s, \-\-syslog] [\-t, \-\-timeshift\-auto] [\-o, \-\-timeshift\-old] [\-v, \-\-verbose] SNAPSHOTS_DIR\fP
 
 .SH "DESCRIPTION"
 .PP
@@ -38,6 +38,10 @@ Write to syslog
 .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.
 
+.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

manpages/grub-btrfsd.8.org

@@ -10,7 +10,7 @@ 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] [-s, --syslog] [-t, --timeshift-auto] [-o, --timeshift-old] [-v, --verbose] SNAPSHOTS_DIR~
 
 * DESCRIPTION
 Grub-btrfsd is a shell script which is meant to be run as a daemon.
@@ -33,6 +33,9 @@ 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.
 
+** ~-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