26 lines
No EOL
654 B
Markdown
26 lines
No EOL
654 B
Markdown
```shell
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#!/bin/bash
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# filename: sync.sh
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LOCK_FILE="/tmp/sync.lock"
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LOG_FILE="/var/log/sync.log"
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(
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flock -n 9 || {
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echo "$(date): 已有同步任务在运行，退出。" >> "$LOG_FILE"
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exit 0
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}
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if [ -f "/root/abc" ]; then
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echo "$(date): 检测到触发文件，开始同步..." >> "$LOG_FILE"
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rsync -avP /root/def /data/sync/ >> "$LOG_FILE" 2>&1
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echo "$(date): 同步完成，移除定时任务。" >> "$LOG_FILE"
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crontab -l 2>/dev/null | grep -v "sync.sh" | crontab -
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else
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echo "$(date): 未检测到触发文件，跳过同步。" >> "$LOG_FILE"
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fi
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) 9>"$LOCK_FILE"
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``` |