46 lines
1.1 KiB
Bash
Executable file
46 lines
1.1 KiB
Bash
Executable file
#!/bin/sh
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# This script simply takes a rrd file and doubles the rows of all its RRA
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#
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# Result in tmp.rrd
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#
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# Make backups before any important use !
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RESULT_FILENAME="result.rrd"
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set -e
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if [ ! -f "$1" ]; then
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echo "ERROR: no file specified." >&2
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exit 1
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fi
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SRC="$1"
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DST="$( dirname "$SRC" )/$RESULT_FILENAME"
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# rrdtool seems to always create in current directory
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RRD_SPECIAL_FILE="resize.rrd"
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if [ -f "$RRD_SPECIAL_FILE" ] || [ -f "$DST" ]; then
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echo "ERROR: files with names '$RRD_SPECIAL_FILE' or '$DST' already exist. Trouble ?" >&2
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exit 1
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fi
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# Initial copy
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cp -ai "$SRC" "$DST"
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# Only use the SRC for enumeration : all the work after that is done on DST
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rrdtool info "$SRC" | grep rows | while read LINE; do
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RRANUM="$( echo "$LINE" | sed 's/.*\[\([0-9]\+\)\].rows.*/\1/' )"
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ROWS="$( echo "$LINE" | sed 's/.* = //' )"
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if [ -z "$RRANUM" ] || [ -z "$ROWS" ]; then
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echo "Trouble at the mill." >&2
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exit 2
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fi
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rrdtool resize "$DST" $RRANUM GROW $ROWS && mv "$RRD_SPECIAL_FILE" "$DST"
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done
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# I often forget this one...
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chmod "--reference=$SRC" "$DST"
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chown "--reference=$SRC" "$DST"
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