102 lines
2.3 KiB
Bash
Executable File
102 lines
2.3 KiB
Bash
Executable File
#!/bin/bash
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MEDIA_ID="$1"
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MODE="append"
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DEV="/dev/nst0"
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LIB="./lib.csv"
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if [ "$2" != "" ]; then
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MODE="$2"
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fi
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function info()
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{
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echo -e "\e[34m[I] $1\e[0m"
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}
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function warn()
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{
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echo -e "\e[33m[W] $1\e[0m"
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}
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function err()
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{
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echo -e "\e[31m[E] $1\e[0m"
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}
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function succ()
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{
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echo -e "\e[32m[ ] $1\e[0m"
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}
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if [ "$MEDIA_ID" == "" ]; then
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echo "usage: $0 <media ID> [rewind]"
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exit
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fi
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info "Backing up new directories to $MEDIA_ID in $DEV."
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if [ ! -f "$LIB" ]; then
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echo "Directory;Media ID;File;Block;Date" > $LIB
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fi
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info "Configuring tape drive"
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mt-st -f $DEV stsetoptions scsi2logical
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mt-st -f $DEV compression 0
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if [ "$MODE" == "append" ]; then
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info "Append to end of data? [ctrl+c to cancel]"
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read a
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mt-st -f $DEV eod
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elif [ "$MODE" == "here" ]; then
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info "Appending to tape at current position. This may overwrite existing data. Are you sure? [ctrl+c to cancel]"
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read a
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else
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warn "Rewinding tape. This will delete all existing data on tape. Are you sure? [ctrl+c to cancel]"
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read a
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mt-st -f $DEV rewind
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fi
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skipped=0
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for dir in *; do
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if [ ! -d "$dir" ]; then
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continue
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fi
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exist=`cat "$LIB" | grep "^$dir;"`
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if [ "$exist" != "" ]; then
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info "Skipping $dir. Already backed up: $exist"
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continue
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fi
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echo ""
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info "Attempting to backup $dir"
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lsize=`du -s "$dir" | sed "s/\s.*//"`
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lsize=$(($lsize / 1024))
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rsize=`sg_logs -a $DEV | sed -n 's/\s*Main partition remaining capacity (in MiB):\s*\(.*\)/\1/p'`
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if [ $lsize -gt $rsize ]; then
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skipped=$((skipped+1))
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warn "Not enough space left on device (${rsize} MB remaining, ${lsize} MB required). Trying next directory."
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continue;
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fi
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info "Appending $dir to tape ($lsize MB, $rsize MB available)"
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fileno=`mt-st -f $DEV status | sed -n 's/File number=\([0-9]\+\).*/\1/p'`
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block=`mt-st -f $DEV tell | sed -n 's/.*At block \([0-9]\+\).*/\1/p'`
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tar cvO "$dir" | dd of=$DEV bs=512k
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if [ $? -ne 0 ]; then
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err "An error occured writing the backup to tape. Aborting."
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exit
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fi
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date=`date`
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echo "$dir;$MEDIA_ID;$fileno;$block;$date" >> $LIB
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done
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info "Rewinding and ejecting tape"
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mt-st -f $DEV rewoff
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echo ""
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if [ $skipped -eq 0 ]; then
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succ "Backup complete. All directories are on tape."
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else
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succ "Tape complete, but there is more data to be backed up."
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warn "Insert a new tape and rerun the script to complete the backup."
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fi
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