ADB Python-守护进程子进程未连接

Question

我有一个简单的 python-daemon，它在执行我的主要测试时在后台运行。此代码在我的 Ubuntu 盒子上运行良好，但自从在我的 Mac 上尝试后，我无法让它运行。

    #! /usr/bin/env python

import daemon
import time as t
import subprocess


def logging():
    while True:
        n = str(10)
        m = str(1)
        i = t.time()
        cpu = open("filepath/to/file" + str(i) + ".txt", "w")
        ram = open("filepath/to/file" + str(i) + ".txt", "w")
        disk = open("filepath/to/file", "a")
        subprocess.call(['adb', 'shell', 'top', '-m', n, '-n', m], stdout=cpu, stderr=cpu)
        subprocess.call(['adb', 'shell', 'cat /proc/meminfo'], stdout=ram)
        subprocess.call(['adb', 'shell', 'df', '/data'], stdout=disk)


def run():
    with daemon.DaemonContext():
        logging()


if __name__ == "__main__":
    run()

每当我执行这段代码时，stderr 都会给我以下输出：

* daemon not running; starting now at tcp:5037
ADB server didn't ACK
Full server startup log: /var/folders/4_/_dcrxz611mv09n6nd404kj_80000gn/T//adb.501.log
Server had pid: 7910
--- adb starting (pid 7910) ---
adb I 06-03 12:32:24  7910 621421 main.cpp:62] Android Debug Bridge version 1.0.41
adb I 06-03 12:32:24  7910 621421 main.cpp:62] Version 30.0.1-6435776
adb I 06-03 12:32:24  7910 621421 main.cpp:62] Installed as /Users/dishbusiness/Desktop/Android/sdk/platform-tools/adb
adb I 06-03 12:32:24  7910 621421 main.cpp:62] 
adb F 06-03 12:32:25  7910 621421 main.cpp:153] could not install *smartsocket* listener: Address already in use

* failed to start daemon
adb: cannot connect to daemon

我可以使用 adb 连接到我的设备，运行我的主要测试。这个守护进程似乎只是不想在 Mac 上与 adb 一起工作。

python 版本 - 3.8.3
adb 版本 - 1.0.41
SDK 版本 - 30.0.1-6435776
Mac OS - 10.15.5

感谢任何帮助！

Answer 1

我能够想出一个解决方法，利用线程而不是守护进程。代码见下方。

import subprocess
import os
from threading import Thread
from datetime import datetime


def run():
    while True:
        m = str(1)
        now = datetime.now().strftime('%Y-%m-%d %H:%M:%S.%f')
        cpu = open("/path/to/file" + str(now) + ".txt", "w")
        ram = open("/path/to/file" + str(now) + ".txt", "w")
        disk = open("/path/to/file/DISK.txt", "a")
        subprocess.call(['adb', 'shell', 'top', '-n', m], stdout=cpu, stderr=cpu)
        subprocess.call(['adb', 'shell', 'cat /proc/meminfo'], stdout=ram)
        subprocess.call(['adb', 'shell', 'df', '/data'], stdout=disk)


def run2():
    subprocess.call(['pytest', 'file.py', '-v', '-s'])
    os._exit(1)


if __name__ == "__main__":
    t1 = Thread(target=run)
    t2 = Thread(target=run2)
    t1.setDaemon(True)
    t2.setDaemon(True)
    t1.start()
    t2.start()
    while True:
        pass

此线程使用多线程使 "background" 进程 (运行) 运行ning 在后台，而主 pytest 进程运行s (运行2).然后，当 pytest 进程结束时，我使用 os._exit(1) 终止后台进程 (运行)。

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