grub-btrfsd: Check if all dirs exist

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

config

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 
-GRUB_BTRFS_VERSION=4.12-master-2023-04-05T15:10:49+00:00
+GRUB_BTRFS_VERSION=4.12-master-2023-04-05T15:26:58+00:00
 
 # Disable grub-btrfs.
 # Default: "false"

grub-btrfsd

@@ -7,7 +7,6 @@
 timeshift_pid=-1
 watchtime=0
 logfile=0
-snapshots=-1
 timeshift_auto=false
 timeshift_old=false
 verbose=false
@@ -174,7 +173,7 @@ while getopts :l:ctvrsh-: opt; do
 done
 shift $(( OPTIND - 1 ))
 
-snapshots="${1}"
+snapdirs=( "${@}" )
 
 # check if inotify exists, see issue #227
 if ! command -v inotifywait >/dev/null 2>&1; then
@@ -207,16 +206,21 @@ if [ ${timeshift_auto} = false ] && [ ${timeshift_old} = true ]; then
 fi
 
 vlog "Arguments:"
-vlog "Snapshot directories: $snapshots"
+vlog "Snapshot directories: ${snapdirs[*]}"
 vlog "Timestift autodetection: $timeshift_auto"
 vlog "Timeshift old: $timeshift_old"
 vlog "Logfile: $logfile"
 vlog "Recursive: $recursive"
 
-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
+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
 
 if [ ${timeshift_auto} = true ]; then
@@ -314,7 +318,6 @@ if [ ${timeshift_auto} = true ] ; then
       daemon_function &
 else
     # for all dirs that got passed to the script, start a new fork with that dir
-    snapdirs=( "${@}" )
     for snapdir in "${snapdirs[@]}"
         do
             vlog "starting daemon watching $snapdir..."