linux中的usb插件/输出
linux中的usb插件/输出
提问于 2012-05-05 04:39:51
我已经使用udev和bash脚本用Linux bash编写了一个程序。
连接usb时，将执行udev规则，该规则调用脚本。该脚本读取/var/ log /messages文件，从日志文件中获取有关所连接usb硬盘的信息，并通过电子邮件发送信息。
程序运行正常，但我遇到了一个问题。当我试图移除usb时，我必须摇动它(因为它被牢牢地注入内部)，所以在移除过程中，它会移除、连接、移除连接，然后最后移除。由于这一点，我的电子邮件格式受到干扰，我没有得到适当的information.also，它产生了许多无用的电子邮件，我得到了以下日志：
May 04 13:06:13 coil sendEmail[12467]: Email was sent successfully!
May 4 13:06:13 coil vmbackup[12450]: USB Removed: Email sent to backupjobs@domain.com
May 4 13:06:16 coil kernel: [8474935.215393] usb 2-6: USB disconnect, address 126
May 4 13:06:16 coil kernel: [8474935.601292] usb 2-6: new high speed USB device using ehci_hcd and address 127
May 4 13:06:17 coil kernel: [8474935.868637] usb 2-6: configuration #1 chosen from 1 choice
May 4 13:06:17 coil kernel: [8474935.915429] scsi85 : SCSI emulation for USB Mass Storage devices
May 4 13:06:17 coil kernel: [8474935.982734] input: Western Digital My Book as /devices/pci0000:00/0000:00:1d.7/usb2/2-6/2-6:1.1/input/input82
May 4 13:06:17 coil kernel: [8474935.982808] generic-usb 0003:1058:1102.0050: input,hidraw0: USB HID v1.11 Device [Western Digital My Book] on usb-0000:00:1d.7-6/input1
May 4 13:06:17 coil kernel: [8474935.982808] generic-usb 0003:1058:1102.0050: input,hidraw0: USB HID v1.11 Device [Western Digital My Book] on usb-0000:00:1d.7-6/input1
May 4 13:06:17 coil kernel: [8474936.084957] usb 2-6: USB disconnect, address 127
May 4 13:06:17 coil kernel: [8474936.500051] usb 2-6: new high speed USB device using ehci_hcd and address 2
May 4 13:06:17 coil kernel: [8474936.769487] usb 2-6: configuration #1 chosen from 1 choice
May 4 13:06:17 coil kernel: [8474936.815499] scsi86 : SCSI emulation for USB Mass Storage devices
May 4 13:06:18 coil kernel: [8474936.882954] input: Western Digital My Book as /devices/pci0000:00/0000:00:1d.7/usb2/2-6/2-6:1.1/input/input83
May 4 13:06:18 coil kernel: [8474936.883044] generic-usb 0003:1058:1102.0051: input,hidraw0: USB HID v1.11 Device [Western Digital My Book] on usb-0000:00:1d.7-6/input1
May 4 13:06:22 coil kernel: [8474941.837814] scsi 86:0:0:0: Direct-Access WD My Book 1028 PQ: 0 ANSI: 4
May 4 13:06:22 coil kernel: [8474941.838208] sd 86:0:0:0: Attached scsi generic sg3 type 0
May 4 13:06:22 coil kernel: [8474941.838208] sd 86:0:0:0: Attached scsi generic sg3 type 0
May 4 13:06:23 coil kernel: [8474941.860051] sd 86:0:0:0: [sdc] 1953525168 512-byte logical blocks: (1.00 TB/931 GiB)
May 4 13:06:23 coil kernel: [8474941.873798] sd 86:0:0:0: [sdc] Write Protect is off
May 4 13:06:23 coil kernel: [8474941.955971] sdc: sdc1
May 4 13:06:23 coil kernel: [8474942.014853] sd 86:0:0:0: [sdc] Attached SCSI disk
May 04 13:06:23 coil sendEmail[12495]: Email was sent successfully!
May 4 13:06:23 coil vmbackup[12478]: USB Added: Email sent to backupjobs@domain.com
May 04 13:06:26 coil sendEmail[12527]: Email was sent successfully!
May 4 13:06:26 coil vmbackup[12510]: USB Removed: Email sent to backupjobs@domain.com
May 04 13:06:35 coil sendEmail[12546]: Email was sent successfully!
May 4 13:06:35 coil vmbackup[12535]: USB Added: Email sent to backupjobs@domain.com
May 04 13:06:37 coil sendEmail[12576]: Email was sent successfully!
May 4 13:06:37 coil vmbackup[12559]: USB Removed: Email sent to backupjobs@domain.com
May 04 13:06:48 coil sendEmail[12596]: Email was sent successfully!
May 4 13:06:48 coil vmbackup[12585]: USB Added: Email sent to backupjobs@domain.com现在我知道这不是编码问题。但是我想知道我是否可以解决这个问题？注意这个场景。
回答 1
Stack Overflow用户
发布于 2012-05-05 05:20:18
你必须在你的脚本中做一些去跳跃。每当它被调用时，检查它最近是否被调用过(< 1秒或2秒)，如果是，什么也不要做。您可以将文件用作/tmp中的时间戳作为时间标记。
像这样的东西可能会起作用：
delta=2 # 2 seconds of debounce
stampfile=/tmp/stamp
now=$(date +%s)
then=$(< $stampfile)
[[ -z $then ]] && then=$now
diff=$((now-then))
if [[ $((diff < delta)) ]]; then
exit
else
echo $now > $stampfile
fi页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/10455859
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