概述：

你好.我有一个python程序,在9-5小时之间控制一个运动传感器.该程序在树莓派上运行,存储在带有西方人v2.1 Debian OS的SD媒体上.该计划在很大程度上依赖于time.sleep方法在非工作时间睡觉,并在第二天上午9点恢复它的职责.如果传感器触发,它会通过网络摄像头自动拍摄一张小图片.

问题：

直到最近该程序工作正常,直到某天有人触发传感器并且take_picture()函数无法初始化/ dev / video0.似乎udev没有将设备映射到/ dev / video *,当我重新插入网络摄像头并用“dmesg | tail”检查它的状态时,我收到一个错误：

[36725.201116] EXT4-fs error (device mmcblk0p2): udev

在研究了问题并得出文件系统损坏的结论后,我试图在SD媒体上运行文件系统检查.在该过程中解决了许多错误,但重新安装USB网络摄像头后再次出现相同的EXT4-fs错误消息.

修复尝试#1

此时我重新安装了操作系统并重新运行了我的传感器python程序;两天它工作,发送图像,睡觉.我假设一切正常,所以我关闭设备将传感器放在更集中的位置.

启动设备并只是从ssh连接运行“python”命令后,我收到此错误：

Traceback (most recent call last):

File "/usr/lib/python2.7/site.py", line 562, in

main()

File "/usr/lib/python2.7/site.py", line 544, in main

known_paths = addusersitepackages(known_paths)

File "/usr/lib/python2.7/site.py", line 271, in addusersitepackages

user_site = getusersitepackages()

File "/usr/lib/python2.7/site.py", line 246, in getusersitepackages

user_base = getuserbase() # this will also set USER_BASE

File "/usr/lib/python2.7/site.py", line 235, in getuserbase

from sysconfig import get_config_var

ImportError: cannot import name get_config_var

在程序运行的时间和重新启动之间没有更改任何设置.我假设最坏的并再次检查“dmesg | tail”并收到更多的文件系统错误：

[36725.201116] EXT4-fs error (device mmcblk0p2): ext4_ext_check_inode:403: inode #21266: comm python: bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0)

[36725.239030] EXT4-fs error (device mmcblk0p2): ext4_ext_check_inode:403: inode #21427: comm python: bad header/extent: too large eh_max - magic f30a, entries 1, max 516(4), depth 0(0)

在额外的文件系统检查并重新启动后,运行“python”：

[ 819.427780] EXT4-fs error (device mmcblk0p2): ext4_ext_check_inode:403: inode #21266: comm python: bad header/extent: invalid extent entries - magic f30a, entries 1, max 4(4), depth 0(0)

[ 819.470874] EXT4-fs error (device mmcblk0p2): ext4_ext_check_inode:403: inode #21427: comm python: bad header/extent: too large eh_max - magic f30a, entries 1, max 516(4), depth 0(0)

[ 819.570893] EXT4-fs error (device mmcblk0p2): ext4_xattr_block_get:232: inode #21265: comm python: bad block 128

在这一点上,我认为这些错误的原因可能与我的程序的核心有关,但实质上它很简单,只在创建图片时写入磁盘.以下是罪魁祸首代码：

潜在问题的代码：

def take_picture():

cam = pygame.camera.Camera("/dev/video0",(320,240)) #1280x960 max but slow

pygame.init()

cam.start()

print "Capturing Image..."

image_output = cam.get_image()

pygame.image.save(image_output,'img_' +str(get_timestamp)+'.jpg')

cam.stop()

#activate PIR

def pir_init():

while True:

m = datetime.datetime.now().time().minute #loop through for current time

h = datetime.datetime.now().time().hour

d = datetime.datetime.today().weekday()

if d > 4:

print("Sleeping...")

print time_sleep

time_sleep = (((7 - d) * 3600) * 24) - (h * 3600) + (9 * 3600)

time.sleep(time_sleep)

elif h < 9:

print("Sleeping...")

time_sleep = (9 - h) * 3600

time.sleep(time_sleep)

elif h > 16:

print("Sleeping...")

time_sleep = ((24 - h) + 9) * 3600

time.sleep(time_sleep)

elif io.input(pir_pin):

print("PIR ALARM")

pygame.camera.init()

time.sleep(1.5)

take_picture()

send_gmail()

time.sleep(10) #cooldown to prevent email spew

else:

print "Waiting..."

time.sleep(0.5) #sleep and wait for movement

print m

print "Wait"

我上面可以看到的唯一潜在问题可能是生成图片或长时间睡眠.

任何洞察可能导致这些重复文件系统错误的内容都将受到赞赏.提前致谢！