☰

我怎样才能等到应用程序启动？

tag-icon • tag-icon bash scripts
我怎样才能等到应用程序启动？

在 Bash 脚本中，如何等到应用程序打开？

例子：

#!/bin/bash

# wait until Thunderbird open to then close its main window...
wmctrl -c "Mozilla Thunderbird"

答案1

基本答案是您必须监视打开的窗口列表以查看是否有变化。您可以通过多种方式执行此操作，但由于您正在使用，因此wmctrl您可以像这样使用：

#!/bin/bash
while true
do
    # get list of windows
    windows=$(wmctrl -l)
    # check if window is on the list
    if [[ "$windows" =~ "Mozilla Firefox" ]];
    then
         echo "found firefox, closing it  in 3 seconds"
         sleep 3 
         wmctrl -c "Mozilla Firefox"
    fi
    # delay until next loop iteration
    sleep 3
done

由于您还要求提供循环示例直到特定窗口关闭，这里有一个经过编辑的示例，采用了替代循环方法（这可能是首选；至少这是我个人经常使用的结构）：

#!/bin/bash
# Script enters into this while loop, and keeps checking
# if wmctrl -l lists firefox. Condition is true if firefox
# isn't there. When firefox appears, condition is false,
# loop exits
while ! [[ "$(wmctrl -l)" =~ "Mozilla Firefox" ]] 
do
    # number of seconds can be changed for better precision
    # but shorter time equals more pressure on CPU
    sleep 3
done

# Only after firefox appears , we get to here
echo "found firefox, closing it  in 3 seconds"
sleep 3 
wmctrl -c "Mozilla Firefox"

# Same idea as before - we enter the waiting loop,
# and keep looping until firefox is not on the list
windows=$(wmctrl -l)
while  [[ "$(wmctrl -l)" =~ "Mozilla Firefox" ]] 
do
    sleep 3
done
#When loop exits, that means firefox isn't on the list
echo "Script is done"

相关内容