inital readme

README.md

@@ -0,0 +1,37 @@
+# snap-sync
+
+## About
+
+This bash script sends incremental snapshots to another drive for backing up
+data. Plug in and mountany btrfs-formatted device you want your system to be
+backed up to (like a USB drive).  When you run the script you will be prompted
+to select a mounted btrfs device.
+
+The script iterates through all snapper configurations. For each configuration
+it creates a new local snapshot. If you have never synced to the specified
+device you will be prompted to enter a directory on the device where the backup
+snapshots will go. Additionally you are show the location of the backed up
+snapshot. If you have performed a backup to this device before, only the changes
+since the last backup have to be sent.
+
+snapper is required.
+
+## Example output
+
+    Selected a mounted BTRFS device to backup to.
+    1) 43cedfb6-8775-43be-8abc-ee63bb92e10e (/)
+    2) 43cedfb6-8775-43be-8abc-ee63bb92e10e (/.snapshots)
+    3) 43cedfb6-8775-43be-8abc-ee63bb92e10e (/home)
+    4) 7360922b-c916-4d9f-a670-67fe0b91143c (/run/media/wes/backup)
+    0) Exit
+    Enter a number: 4
+    You selected the disk with UUID 7360922b-c916-4d9f-a670-67fe0b91143c.
+    At 'home' configuration
+    Backup location: /run/media/wes/backup/acer-c720/home/1097/
+    Continue (y/n)? y
+    At subvol /home/.snapshots/1097/snapshot
+    At 'root' configuration
+    Backup location: /run/media/wes/backup/acer-c720/root/2288/
+    Continue (y/n)? y
+    At subvol //.snapshots/2288/snapshot
+    Done!

backup

@@ -7,18 +7,10 @@
 # snapshot created on your system since that will be used to determine the
 # difference for the next incremental snapshot.
 
-# Can set the backup directory here, or in the snapper configuration file with
-# EXT_BACKUP_LOCATION
-declare -r description="latest incremental backup"
-
-# You can set a snapper configuration to be excluded by setting EXT_BACKUP="no"
-# in its snapper configuration file.
-
-#--------------------------------------------------------
-# Don't modify anything below here
-
 set -e
 
+declare -r description="latest incremental backup"
+
 if [[ $EUID -ne 0 ]]; then
     printf "Script must be run as root.\n" 
     exit
@@ -108,7 +100,7 @@ for x in $SNAPPER_CONFIGS; do
 
     if [[ -z "$old_number" ]]; then
 
-        btrfs send "$new_snapshot" | btrfs receive "$backup_location"
+        btrfs send "$new_snapshot" | btrfs receive "$backup_location" &>/dev/null
 
     else
 
@@ -128,6 +120,4 @@ for x in $SNAPPER_CONFIGS; do
 
 done
 
-date > "$HOME"/.lastbackup
-
 printf "Done!\n"