如何在Bash中運行多個inotifywait循環？

Question

我跑作爲守護聽文件的腳本：

#!/bin/bash 
echo '1' 
while inotifywait -e close_write /home/homeassistant/.homeassistant/automations.yaml 
do 
    echo 'automations' 
    curl -X POST -H "x-ha-access: pass" -H "Content-Type: application/json" http://hassbian.local:8123/api/services/automation/reload 
done; 

我想聽聽幾個文件，並試圖增加了兩個循環：

while inotifywait -e close_write /home/homeassistant/.homeassistant/groups.yaml 
do 
    echo 'gropus' 
    curl -X POST -H "x-ha-access: pass" -H "Content-Type: application/json" http://hassbian.local:8123/api/services/group/reload 
done; 

while inotifywait -e close_write /home/homeassistant/.homeassistant/core.yaml 
do 
    echo 'core' 
    curl -X POST -H "x-ha-access: pass" -H "Content-Type: application/json" http://hassbian.local:8123/api/services/homeassistant/reload_core_config 
done; 

我意識到第一循環永遠不會關閉，所以其他的永遠不會開始，但不知道我應該如何解決這個問題。

Answer 1

您需要在後臺進程中運行第一個循環，以便它不會阻止腳本。您可能需要在背景中運行每個循環以獲得對稱性，然後在腳本結尾處等待它們。

while inotifywait -e close_write /home/homeassistant/.homeassistant/groups.yaml 
do 
    echo 'gropus' 
    curl -X POST -H "x-ha-access: pass" -H "Content-Type: application/json" http://hassbian.local:8123/api/services/group/reload 
done & 

while inotifywait -e close_write /home/homeassistant/.homeassistant/core.yaml 
do 
    echo 'core' 
    curl -X POST -H "x-ha-access: pass" -H "Content-Type: application/json" http://hassbian.local:8123/api/services/homeassistant/reload_core_config 
done & 

wait 

但是，您可以運行在監控模式inotifywait和監視多個文件，其輸出作爲管道進入一個循環。 （警告：像任何面向線路的輸出格式，這不能應付包含換行符的文件名請參見--format和--csv選項處理包含空格的文件名。）你爲什麼首先使用循環

files=(
    /home/homeassistant/.homeassistant/groups.yaml 
    /home/homeassistant/.homeassistant/core.yaml 
) 

take_action() { 
    echo "$1" 
    curl -X POST "x-ha-access: pass" -H "Content-Type: application/json" \ 
     http://hassbian.local:8123/api/services/"$2" 
} 

inotifywait -m -e close_write "${files[@]}" | 
    while IFS= read -r fname _; do 
    case $fname in 
     */groups.yaml) take_action "groups" "group/reload" ;; 
     */core.yaml) take_action "core" "homeassistant/reload_core_config" ;; 
    sac 
    done