我编写了一个小的bash脚本,每3秒启动一个程序。该脚本在启动时执行,并将其PID保存到pidfile中:
#!/bin/bash
echo $$ > /var/run/start_gps-read.pid
while [ true ] ; do
if [ "$1" == "stop" ] ;
then
echo "Stopping GPS read script ..."
sudo pkill -F /var/run/start_gps-read.pid
exit
fi
sudo /home/dh/gps_read.exe /dev/ttyACM0 /home/dh/gps_files/gpsMaus_1.xml
sleep 3
done
问题是,我无法通过调用
start_gps-read.sh stop
终止shell脚本。在那里,它应该读取pidfile并停止初始过程(从启动开始)。但是当我调用
stop
时,脚本仍然运行:dh@Raspi_DataHarvest:~$ sudo /etc/init.d/start_gps-read.sh stop
Stopping GPS read script ...
dh@Raspi_DataHarvest:~$ ps aux | grep start
root 488 0.0 0.3 5080 2892 ? Ss 13:30 0:00 /bin/bash /etc/init.d/start_gps-read.sh start
dh 1125 0.0 0.2 4296 2016 pts/0 S+ 13:34 0:00 grep start
注意:该脚本始终作为
sudo
执行。有谁知道如何停止我的shell脚本?
最佳答案
在覆盖pid文件之前,必须先执行“停止”检查,当然也不必将其放入循环中。
if [ "$1" = stop ]; then
echo "Stopping ..."
sudo pkill -F /var/run/start_gps-read.pid
exit
fi
echo "$$" > /var/run/start_gps-read.pid
while true; do
sudo /home/dh/gps_read.exe ...
sleep 3
done