From 7f5e3877cb93adb0ea948e670021617b14cd0be9 Mon Sep 17 00:00:00 2001
From: David Kebler <dgkebler@gmail.com>
Date: Sat, 20 Apr 2024 16:43:25 -0700
Subject: [PATCH] add readonly flag to folder snapshot add new function
 snapshot_send to send a snapshot to another mounted partition or drive

---
 modules/filesystem/btrfs/btrfs.mod | 37 ++++++++++++++++++++++++++++--
 1 file changed, 35 insertions(+), 2 deletions(-)

diff --git a/modules/filesystem/btrfs/btrfs.mod b/modules/filesystem/btrfs/btrfs.mod
index 1bde042..8bced0a 100644
--- a/modules/filesystem/btrfs/btrfs.mod
+++ b/modules/filesystem/btrfs/btrfs.mod
@@ -101,17 +101,50 @@ find_subvolumes() {
 }
 
 folder_snapshot() {
-
+  if [[ $1 == "-r" ]];then 
+    readonly=-r
+    shift 1
+   else 
+   readonly=""
+  fi 
   for sv in $(find_subvolumes $1 1); do
     if [[ -d $2/$sv ]]; then
       echo snapshot $sv already exists in $2. You must manually delete target snapshots!
     else
-      sudo $BTRFS_BIN sub snap $1/$sv $2
+      sudo $BTRFS_BIN sub snap $readonly $1/$sv $2
     fi
   done
 
 }
 
+
+snapshot_send() {
+  if [[ $1 == "-e" ]];then 
+    dr=""
+    shift 1
+   else 
+    echo "snapshot_send <-e> <souce snapshot path> <destination folder on different partition> <destination extension>"
+    echo preface with -e to execute 
+    dr="echo"
+  fi
+  temp="$(dirname $1)/tmp_send"
+  name=$(basename $1)
+  name=$(echo $name | cut -f 1 -d '.') 
+  ext="$(echo $name | cut -s -f 2 -d '.')"
+  [[ $ext ]] && ext=".$ext"
+  [[ $3 ]] && ext=".$3" 
+  sudo mkdir $temp 
+  $dr sudo $BTRFS_BIN sub snap -r $1 $temp/$name$ext
+  if [[ $dr ]]; then
+  $dr "sudo $BTRFS_BIN send $temp/$name$ext | btrfs receive $2"
+  else 
+  sudo $BTRFS_BIN send $temp/$name$ext | btrfs receive $2
+  fi
+  $dr sudo $BTRFS_BIN sub del $temp/$name$ext
+  ls -la $2
+  sudo rm -r $temp
+}
+
 mount_subvolume () {
   # echo sudo mount $1 -o subvol=$2 $3
   if mountpoint $3 &> /dev/null; then