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调试通知发送电池警报脚本

tag-icon • tag-icon shell-script cron
调试通知发送电池警报脚本

我曾经crontab -e定义以下内容：

*/5 * * * * env DISPLAY=:0 /home/max/.bin/battery-check.sh

脚本的内容是：

#!/bin/bash                                                          

# Battery level warning script

battery_level=`acpi -b | grep -P -o '[0-9]+(?=%)'`

if [[ "$battery_level" -le "80" && "$battery_level" -gt "10" ]]
    then
    notify-send "Battery low warning"  "
Battery level is ${battery_level}%"
elif [[ "$battery_level" -le "10" && "$battery_level" -gt "5" ]]
    then
    notify-send "Battery very low warning"  "
Battery level is ${battery_level}%
Use ac power now,
 or shutdown is imminent - close applications"
else [[ "$battery_level" -le "5" ]]
    # our custom actions for critical battery level
    notify-send "Battery critical warning"  "
Battery level is ${battery_level}%
Shutting system down now"
fi

有些语句（例如第一个语句-le "80"）仅用于测试/调试目的。该脚本的问题在于，它会导致每 5 分钟弹出一个报告最后一个条件的窗口：

电池严重警告
电池电量为 100%
正在关闭系统

答案1

前两个条件都不满足，因此else执行的块包括：

[[ "$battery_level" -le "5" ]]    # evaluates this, which does nothing
notify-send ...                   # shows the message you are seeing

这就是你想要的：

#!/bin/bash                                                          

# Battery level warning script

battery_level=`acpi -b | grep -oP '[0-9]+(?=%)'`

if [[ $battery_level -le 80 && $battery_level -gt 10 ]]; then
    notify-send "Battery low warning"  "
Battery level is ${battery_level}%"
elif [[ $battery_level -le 10 && $battery_level -gt 5 ]]; then
    notify-send "Battery very low warning"  "
Battery level is ${battery_level}%
Use ac power now,
 or shutdown is imminent - close applications"
elif [[ $battery_level -le 5 ]]; then
    # our custom actions for critical battery level
    notify-send "Battery critical warning"  "
Battery level is ${battery_level}%
Shutting system down now"
fi

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