rzerres/dsnap-sync
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snap-sync: support selection of SUBVOLID

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- either use --subvolid 'id' or --SUBVOLID 'id'
- or --subvolid='id' or --SUBVOLID='id'

Signed-off-by: Ralf Zerres <ralf.zerres@networkx.de>
This commit is contained in:
Ralf Zerres
2017-11-16 19:22:20 +01:00
parent 3033822423
commit f99b720a21
1 changed files with 29 additions and 4 deletions
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33
bin/snap-sync
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@@ -42,6 +42,7 @@ exec 3>$PIPE
disk_count=-1
disk_uuid_match_count=0
disk_target_match_count=0
disk_subvolid_match_count=0
disk_uuid_match=''
selected_uuid='none'
selected_target='none'
@@ -100,7 +101,7 @@ get_disk_infos () {
# we need at least one target disk
if [ ${#disk_targets} -eq 0 ]; then die "no suitable target disk found \n"die
fi
# Posix Shells do not support Array. Therefore using ...
# Pseudo-Arrays (assumption: equal number of members)
# Pseudo-Array: disk_uuid_$i
@@ -137,6 +138,12 @@ get_disk_infos () {
i=0
for fs_option in $fs_options; do
eval "fs_options_$i='$fs_option'"
subvolid=$(eval echo \$fs_options | sed -e 's/.*subvolid=\([0-9]*\).*/\1/')
if [ "$subvolid" = "$subvolid_cmdline" ]; then
disk_subvolid_match="$i"
disk_subvolid_match_count=$(($disk_subvolid_match_count+1))
fi
eval "disk_target_$i='$disk_target'"
i=$((i+1))
done
}
@@ -194,6 +201,10 @@ parse_params () {
nonotify=1
shift
;;
-s|--subvolid|--SUBVOLID)
subvolid_cmdline="$2"
shift 2
;;
-u|--UUID)
uuid_cmdline="$2"
shift 2
@@ -211,6 +222,10 @@ parse_params () {
ssh="ssh $remote"
shift 2
;;
--subvolid=*|--SUBVOLID=*)
subvolid_cmdline=${1#*=}
shift
;;
--TARGET=*)
target_cmdline=${1#*=}
shift
@@ -558,7 +573,7 @@ run_backup () {
# which is stored in snappers info.xml file of the source snapshot.
# This is how we find the parent.
userdata="backupdir=$backup_dir, uuid=$selected_uuid, subvolid=$selected_subvol"
userdata="backupdir=$backup_dir, subvolid=$selected_subvol, uuid=$selected_uuid"
# Tag new snapshot as the latest
printf "Tagging new snapshot as latest backup for '%s' ...\n" "$selected_config" | tee $PIPE
@@ -590,6 +605,16 @@ select_target_disk () {
printf "Selecting a mounted BTRFS device for backups on %s.\n" "$remote"
fi
while [ "$disk_id" -eq -1 ] || [ "$disk_id" -le $disk_count ]; do
if [ "$disk_subvolid_match_count" -eq 1 ]; then
# matching SUBVOLID selection from commandline
# Pseudo-Array: disk_selected_$i (reference to $disk_uuid element)
eval "disk_selected_$i='$disk_subvolid_match'"
disk=$(eval echo \$disk_uuid_$disk_subvolid_match)
subvolid=$(eval echo \$disk_subvolid_$disk_subvolid_match)
fs_options=$(eval echo \$fs_options_$disk_target_match | sed -e 's/.*,\(subvolid=[0-9]*\).*,\(subvol=[0-9]*\)/\1,\2/')
disk_selected=$disk_subvolid_match
break
fi
if [ "$disk_target_match_count" -eq 1 ]; then
# matching TARGET selection from commandline
# Pseudo-Array: disk_selected_$i (reference to $disk_uuid element)
@@ -689,8 +714,8 @@ Options:
-u, --UUID <UUID> Specify the UUID of the mounted BTRFS subvolume to back up to. Otherwise will prompt."
If multiple mount points are found with the same UUID, will prompt user."
-l, --TARGET <target> Specify the mountpoint of the BTRFS subvolume to back up to.
--remote <address> Send the snapshot backup to a remote machine. The snapshot will be sent via ssh. You
should specify the remote machine's hostname or ip address. The 'root' user must be
--remote <address> Send the snapshot backup to a remote machine. The snapshot will be sent via ssh. You
should specify the remote machine's hostname or ip address. The 'root' user must be
permitted to login on the remote machine.
--dry-run perform a trial run where no changes are made.
-v, --verbose Be more verbose on what's going on.