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| -rw-r--r-- | backuper.sh | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/backuper.sh b/backuper.sh new file mode 100644 index 0000000..b0990d5 --- /dev/null +++ b/backuper.sh @@ -0,0 +1,241 @@ +## Some default values of important variables + +## Settings +GPG_RECIPIENT="robin.oburka@nic.cz" + +## Style +TIME_FMT="Time:\t%E" + +## Internal variables +NAME="" +DST_COMMAND="" +#GENERATE="sudo" +GENERATE="" +COMMAND="" +PLACES="" +EXCLUDE="" +MIDDLE="" +STORE="" + +## Pipeline variables +PID_GENERATE="" +PID_MIDDLE="" +PID_STORE="" +FIFO_GEN="" +FIFO_STORE="" + +test_input() { + [ -z "$NAME" ] && error "Specify backup name" + [ -z "$COMMAND" -a -z "$PLACES" ] && error "Specify backup subject" + [ -n "$COMMAND" -a -n "$PLACES" ] && error "Do not specify two types of backup at once" +} + +name() { + NAME="$1" +} + +generate() { + GENERATE="$1" +} + +cmd() { + COMMAND="$1" +} + +places() { + PLACES="$1" + [ "$#" -gt 1 ] && error "Specify places as string" + + #STR="" + #for PLACE in "$@"; do + # STR="$STR "$PLACE"" + #done + #PLACES="$STR" +} + +exclude() { + STR="" + for EXC in "$@"; do + STR="$STR --exclude=$EXC" + done + EXCLUDE="$STR" +} + +middle() { + MIDDLE="$1" +} + +store() { + STORE="$1" +} + +error() { + echo "ERROR: $1" >&2 + exit 1 +} + +die() { + if [ -n "$1" ]; then + echo "DIE: $1" >&2 + fi + kill -6 "$$" +} + +compute_variables() { + UTS="$(date +"%s")" + TS="$(date +"%Y-%m-%d_%H-%M-%S")" + FILENAME="backup_"$NAME"_"$TS".tar" + FILENAME_ENC="$FILENAME".gpg + FIFO_GEN="/tmp/backuper_pipe_gen_$$_$UTS" + FIFO_STORE="/tmp/backuper_pipe_str_$$_$UTS" +} + +title() { + TXT="$1" + printf "\n%s\n==========================================\n" "$TXT" +} + +get_size() { + FILE="$1" + du -h "$FILE" | awk '{ print $1 }' +} + +prepare() { + + #mkdir -p "$DST" + #touch "$DST"/"$FILENAME" + ##chown root:root "$DST"/"$FILENAME" + #chmod 600 "$DST"/"$FILENAME" + echo "prepare $$" + trap 'error_handler' EXIT INT QUIT TERM ABRT HUP ILL TRAP BUS FPE SEGV + mkfifo "$FIFO_GEN" + mkfifo "$FIFO_STORE" +} + +error_handler() { + cleanup + exit 42 +} + +cleanup() { + echo "Cleaning up... ($$)" >&2 + + trap - EXIT INT QUIT TERM HUP ILL TRAP BUS FPE SEGV + + [ -n "$PID_GENERATE" ] && if ps --ppid $$ | grep -q "$PID_GENERATE"; then + echo "Killing "$PID_GENERATE"" + kill "$PID_GENERATE" + fi + [ -n "$PID_MIDDLE" ] && if ps --ppid $$ | grep -q "$PID_MIDDLE"; then + echo "Killing "$PID_MIDDLE"" + kill "$PID_MIDDLE" + fi + [ -n "$PID_STORE" ] && if ps --ppid $$ | grep -q "$PID_STORE"; then + echo "Killing "$PID_STORE"" + kill "$PID_STORE" + fi + + rm -f "$FIFO_GEN" + rm -f "$FIFO_STORE" + +} + +start_store() { + $STORE < "$FIFO_STORE" +} + +start_middle() { + $MIDDLE < "$FIFO_GEN" > "$FIFO_STORE" +} + +start_command() { + if [ -n "$COMMAND" ]; then + echo "$COMMAND" | $GENERATE sh -s > "$FIFO_GEN" + else + ## Exclude keep without quotes + /usr/bin/time -f "$TIME_FMT" $GENERATE tar c --preserve-permissions $EXCLUDE "$PLACES" > "$FIFO_GEN" + fi + + +# if [ -z "$GENERATE" ]; then +# $COMMAND > "FIFO_GEN" +# else +# echo $COMMAND | $GENERATE sh -s +# fi +} + +start_pipeline() { + start_store || die & + PID_STORE=$! + + start_middle || die & + PID_MIDDLE=$! + + start_command || die & + PID_COMMAND=$! + +# if ! wait "$PID_COMMAND"; then +# die "Backup command failed" +# fi +# echo "Command done" >&2 +# +# if ! wait "$PID_STORE"; then +# die "Store command failed" +# fi +# echo "Store done" >&2 +# +# if ! wait "$PID_MIDDLE"; then +# die "Middle command failed" +# fi +# echo "Middle done" >&2 +wait "$PID_STORE" "$PID_MIDDLE" "$PID_COMMAND" +} + +#backup_cmd() { +# /usr/bin/time -f "$TIME_FMT" $COMMAND +# [ "$?" != 0 ] && die "Generator command exited with error" +#} +# +#create_backup() { +# title "Create" +# +# if [ -n "$PLACES" ]; then +# backup_tar | cat > "$DST"/"$FILENAME" +# elif [ -n "$COMMAND" ]; then +# echo "Generating with command: $COMMAND" +# backup_cmd | cat > "$DST"/"$FILENAME" +# else +# error "There is no generating command" +# fi +# +# printf "Backup:\t%s (%s)\n\n" "$FILENAME" "$(get_size "$DST"/"$FILENAME")" +#} +# +#enc() { +# title "Encrypt" +# /usr/bin/time -f "$TIME_FMT" gpg --compress-algo zlib --recipient "$GPG_RECIPIENT" -e "$DST"/"$FILENAME" +# [ "$?" != 0 ] && die "Encription failed" +# rm "$DST"/"$FILENAME" +# printf "Encrypted backup:\t%s (%s)\n\n" "$FILENAME_ENC" "$(get_size "$DST"/"$FILENAME_ENC")" +#} +# +#run() { +# title "Run command" +# echo "$@" +# CMD="sh -c \"$@\"" +# echo $@ | $GENERATE sh -s +# printf "\n" +#} + +backup() { + test_input + compute_variables + prepare + start_pipeline + #kill $$ + cleanup + #create_backup + #secure + #enc + #send +} |