52 lines
1.1 KiB
Bash
Executable File
52 lines
1.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -euo pipefail
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usage() {
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echo "usage: $0 backup <data-file> <backup-dir> | restore <backup-file> <data-file>" >&2
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exit 2
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}
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[ "$#" -eq 3 ] || usage
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command=$1
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source=$2
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target=$3
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case "$command" in
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backup)
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[ -f "$source" ] || {
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echo "data file does not exist: $source" >&2
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exit 1
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}
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mkdir -p "$target"
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name="$(basename "$source").$(date -u +%Y%m%dT%H%M%SZ).manual.json"
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temporary="$target/.wxagent-backup-$$.tmp"
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trap 'rm -f "$temporary"' EXIT
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install -m 600 "$source" "$temporary"
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mv -f "$temporary" "$target/$name"
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sha256sum "$target/$name"
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;;
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restore)
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[ -f "$source" ] || {
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echo "backup file does not exist: $source" >&2
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exit 1
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}
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directory=$(dirname "$target")
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mkdir -p "$directory"
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lock="$target.lock"
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exec 9>"$lock"
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flock -n 9 || {
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echo "data file is in use; stop the active control plane first" >&2
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exit 1
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}
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temporary="$directory/.wxagent-restore-$$.tmp"
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trap 'rm -f "$temporary"' EXIT
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install -m 600 "$source" "$temporary"
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python3 -m json.tool "$temporary" >/dev/null
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mv -f "$temporary" "$target"
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sha256sum "$target"
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;;
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*)
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usage
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;;
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esac
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