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Using find instead of ls to find the last and second last directory used for backup.

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Laurent Cozic 2013-11-13 17:46:20 +08:00
parent c23f47164e
commit 2fd6b109f0
1 changed files with 12 additions and 16 deletions
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28
rsync_tmbackup.sh
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@ -74,13 +74,12 @@ fi
# Setup additional variables
# -----------------------------------------------------------------------------
BACKUP_FOLDER_PATTERN="^[[:digit:]][[:digit:]][[:digit:]][[:digit:]]-[[:digit:]][[:digit:]]-[[:digit:]][[:digit:]]-[[:digit:]][[:digit:]][[:digit:]][[:digit:]][[:digit:]][[:digit:]]$"
BACKUP_FOLDER_PATTERN=????-??-??-??????
NOW=$(date +"%Y-%m-%d-%H%M%S")
PROFILE_FOLDER="$HOME/.rsync_tmbackup"
LOG_FILE="$PROFILE_FOLDER/$NOW.log"
DEST=$DEST_FOLDER/$NOW
LAST_TIME=$(ls -1 -- "$DEST_FOLDER" | grep "$BACKUP_FOLDER_PATTERN" | tail -n 1)
PREVIOUS_DEST=$DEST_FOLDER/$LAST_TIME
PREVIOUS_DEST=$(find "$DEST_FOLDER" -type d -name "$BACKUP_FOLDER_PATTERN" -prune | sort | tail -n 1)
INPROGRESS_FILE=$DEST_FOLDER/backup.inprogress
# -----------------------------------------------------------------------------
@ -97,19 +96,18 @@ fi
# -----------------------------------------------------------------------------
if [ -f "$INPROGRESS_FILE" ]; then
if [ "$LAST_TIME" != "" ]; then
if [ "$PREVIOUS_DEST" != "" ]; then
# - Last backup is moved to current backup folder so that it can be resumed.
# - 2nd to last backup becomes last backup.
fn_log_info "$INPROGRESS_FILE already exists - the previous backup failed or was interrupted. Backup will resume from there."
LINE_COUNT=$(ls -1 -- "$DEST_FOLDER" | grep "$BACKUP_FOLDER_PATTERN" | tail -n 2 | wc -l)
LINE_COUNT=$(find "$DEST_FOLDER" -type d -name "$BACKUP_FOLDER_PATTERN" -prune | sort | tail -n 2 | wc -l)
mv -- "$PREVIOUS_DEST" "$DEST"
if [ "$LINE_COUNT" -gt 1 ]; then
SECOND_LAST_TIME=$(ls -1 -- "$DEST_FOLDER" | grep "$BACKUP_FOLDER_PATTERN" | tail -n 2 | head -n 1)
LAST_TIME=$SECOND_LAST_TIME
PREVIOUS_PREVIOUS_DEST=$(find "$DEST_FOLDER" -type d -name "$BACKUP_FOLDER_PATTERN" -prune | sort | tail -n 2 | head -n 1)
PREVIOUS_DEST=$PREVIOUS_PREVIOUS_DEST
else
LAST_TIME=""
PREVIOUS_DEST=""
fi
PREVIOUS_DEST=$DEST_FOLDER/$LAST_TIME
fi
fi
@ -121,7 +119,7 @@ while [ "1" ]; do
# -----------------------------------------------------------------------------
LINK_DEST_OPTION=""
if [ "$LAST_TIME" == "" ]; then
if [ "$PREVIOUS_DEST" == "" ]; then
fn_log_info "No previous backup - creating new one."
else
# If the path is relative, it needs to be relative to the destination. To keep
@ -201,20 +199,18 @@ while [ "1" ]; do
fn_log_warn "No space left on device - removing oldest backup and resuming."
BACKUP_FOLDER_COUNT=$(ls -1 $DEST_FOLDER | grep "$BACKUP_FOLDER_PATTERN" | wc -l)
BACKUP_FOLDER_COUNT=$(find "$DEST_FOLDER" -type d -name "$BACKUP_FOLDER_PATTERN" -prune | wc -l)
if [ "$BACKUP_FOLDER_COUNT" -lt "2" ]; then
fn_log_error "No space left on device, and no old backup to delete."
exit 1
fi
OLDEST_BACKUP=$(ls -1 $DEST_FOLDER | grep "$BACKUP_FOLDER_PATTERN" | head -n 1)
if [ "$OLDEST_BACKUP" == "" ]; then
OLD_BACKUP_PATH=$(find "$DEST_FOLDER" -type d -name "$BACKUP_FOLDER_PATTERN" -prune | head -n 1)
if [ "$OLD_BACKUP_PATH" == "" ]; then
fn_log_error "No space left on device, and cannot get path to oldest backup to delete."
exit 1
fi
OLD_BACKUP_PATH="$DEST_FOLDER/$OLDEST_BACKUP"
# Double-check that we're on a backup destination to be completely sure we're deleting the right folder
OLD_BACKUP_PARENT_PATH=$(dirname -- "$OLD_BACKUP_PATH")
if [ "$(fn_is_backup_destination $OLD_BACKUP_PARENT_PATH)" != "1" ]; then