schiwagoa/rsync-time-backup
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Deal with arguments with special characters better

Browse Source 
Script now handles filenames with special characters (such as spaces,
hard tabs, newlines, double quotes and a dash prefix). The only
exceptions are filenames with single quotes. In this case, the script
will fail early with a clear error message.
This commit is contained in:
David D Lowe
2013-10-30 13:45:48 +00:00
parent 1b0b115dd0
commit 396b42d483
1 changed files with 20 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files
rsync_tmbackup.sh
+20 -12
View File
@@ -19,6 +19,13 @@ SRC_FOLDER=${1%/}
DEST_FOLDER=${2%/}
EXCLUSION_FILE=$3
for arg in "$SRC_FOLDER" "$DEST_FOLDER" "$EXCLUSION_FILE"; do
if [[ "$arg" == *"'"* ]] ; then
echo 'Arguments may not have any single quote characters!'
exit 1
fi
done
# -----------------------------------------------------------------------------
# Check that the destination drive is a backup drive
# -----------------------------------------------------------------------------
@@ -28,7 +35,7 @@ if [ ! -f "$DEST_MARKER_FILE" ]; then
echo "Safety check failed - the destination does not appear to be a backup folder or drive (marker file not found)."
echo "If it is indeed a backup folder, you may add the marker file by running the following command:"
echo ""
echo "touch \"$DEST_MARKER_FILE\""
echo "touch -- \"$DEST_MARKER_FILE\""
echo ""
exit 1
fi
@@ -39,7 +46,7 @@ fi
NOW=$(date +"%Y-%m-%d-%H%M%S")
DEST=$DEST_FOLDER/$NOW
LAST_TIME=$(ls -1 $DEST_FOLDER | grep "\d\d\d\d-\d\d-\d\d-\d\d\d\d\d\d" | tail -n 1)
LAST_TIME=$(ls -1 -- $DEST_FOLDER | grep "\d\d\d\d-\d\d-\d\d-\d\d\d\d\d\d" | tail -n 1)
PREVIOUS_DEST=$DEST_FOLDER/$LAST_TIME
INPROGRESS_FILE=$DEST_FOLDER/backup.inprogress
@@ -51,11 +58,11 @@ if [ -f "$INPROGRESS_FILE" ]; then
if [ "$LAST_TIME" != "" ]; then
# - Last backup is moved to current backup folder so that it can be resumed.
# - 2nd to last backup becomes last backup.
echo "$INPROGRESS_FILE already exists - the previous backup failed or was interrupted. Backup will resume from there."
LINE_COUNT=$(ls -1 $DEST_FOLDER | grep "\d\d\d\d-\d\d-\d\d-\d\d\d\d\d\d" | tail -n 2 | wc -l)
mv $PREVIOUS_DEST $DEST
echo -- "$INPROGRESS_FILE already exists - the previous backup failed or was interrupted. Backup will resume from there."
LINE_COUNT=$(ls -1 -- $DEST_FOLDER | grep "\d\d\d\d-\d\d-\d\d-\d\d\d\d\d\d" | tail -n 2 | wc -l)
mv -- $PREVIOUS_DEST $DEST
if [ "$LINE_COUNT" -gt 1 ]; then
SECOND_LAST_TIME=$(ls -1 $DEST_FOLDER | grep "\d\d\d\d-\d\d-\d\d-\d\d\d\d\d\d" | tail -n 2 | head -n 1)
SECOND_LAST_TIME=$(ls -1 -- $DEST_FOLDER | grep "\d\d\d\d-\d\d-\d\d-\d\d\d\d\d\d" | tail -n 2 | head -n 1)
LAST_TIME=$SECOND_LAST_TIME
else
LAST_TIME=""
@@ -74,7 +81,7 @@ if [ "$LAST_TIME" == "" ]; then
else
# If the path is relative, it needs to be relative to the destination. To keep
# it simple, just use an absolute path. See http://serverfault.com/a/210058/118679
PREVIOUS_DEST=`cd \`dirname "$PREVIOUS_DEST"\`; pwd`"/"`basename "$PREVIOUS_DEST"`
PREVIOUS_DEST=`cd \`dirname -- "$PREVIOUS_DEST"\`; pwd`"/"`basename -- "$PREVIOUS_DEST"`
echo "Previous backup found - doing incremental backup from $PREVIOUS_DEST"
LINK_DEST_OPTION="--link-dest=$PREVIOUS_DEST"
fi
@@ -85,7 +92,7 @@ fi
if [ ! -d "$DEST" ]; then
echo "Creating destination $DEST"
mkdir -p $DEST
mkdir -p -- $DEST
fi
# -----------------------------------------------------------------------------
@@ -107,19 +114,20 @@ CMD="$CMD --one-file-system"
CMD="$CMD --archive"
CMD="$CMD --progress"
if [ "$EXCLUSION_FILE" != "" ]; then
CMD="$CMD --exclude-from \"$EXCLUSION_FILE\""
# We've already checked that $EXCLUSION_FILE doesn't contain a single quote
CMD="$CMD --exclude-from '$EXCLUSION_FILE'"
fi
CMD="$CMD $LINK_DEST_OPTION $SRC_FOLDER/ $DEST/"
CMD="$CMD -- '$LINK_DEST_OPTION' '$SRC_FOLDER/' '$DEST/'"
CMD="$CMD | grep -E '^deleting|[^/]$'"
echo "Running command:"
echo $CMD
touch $INPROGRESS_FILE
touch -- $INPROGRESS_FILE
eval $CMD
EXIT_CODE=$?
if [ "$EXIT_CODE" == "0" ]; then
rm $INPROGRESS_FILE
rm -- $INPROGRESS_FILE
else
echo "Error: Exited with error code $EXIT_CODE"
fi