Python：运行变成后台进程的脚本立即死亡

Question

I'm working on a piece of code in python where I'm using parallel-ssh to run a script on a Raspberry Pi. The script runs for about a 1 and then disappears even though there is nohup in the script.

Code to run the script from server:

return subprocess.call(["parallel-ssh", "-h", hosts_path, "-o", "pssh-out", "-e", "pssh-err", "-i" if inline else "", cmd])

and on the Raspberry Pi the script looks like this:

log_path=$1

tty_path=`ls /dev/serial/by-id/usb-MBED_MBED_CMSIS-DAP_*`
nohup /home/pi/scripts/ble/contiki-serialdump -b9600 $tty_path | /home/pi/scrip$


sleep 1
ps | grep "$! "

#exit $?

Any ideas why it doesn't keep running in the background?

Answer 1

Your script isn't waiting before it exits. You'll need a shell with job control (such as Bash), and use the wait builtin command. Read the bash man page to understand wait .

Answer 2

问题显然是必须关闭然后打开USB集线器才能正确启动串行转储