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dwmblocks我在笔记本电脑的状态栏上使用了 DWM（平铺窗口管理器） 。我在这台笔记本电脑上有 3 个 USB 端口。当我连接 USB 驱动器时，我使用此脚本检测并在状态栏上显示一个块（图标）。

if [[ "$(dmesg -S | tail | grep "usb-storage")" =~ "USB Mass Storage device detected" ]]; then
           icon=" ️ "
           else
           icon=""
   fi

   printf "%s%s\\n" "$icon"

但是这个脚本还不够好。当我连接 1 个 USB 时，它给出了这个

[  151.134547] usb-storage 1-2:1.0: USB Mass Storage device detected
[  151.138129] scsi host2: usb-storage 1-2:1.0
[  152.157810] scsi 2:0:0:0: Direct-Access     MBIL SSM Moser Baer Disk  8.07 PQ: 0 ANSI: 4
[  152.158051] sd 2:0:0:0: Attached scsi generic sg2 type 0
[  152.158711] sd 2:0:0:0: [sdb] 31027200 512-byte logical blocks: (15.9 GB/14.8 GiB)
[  152.159381] sd 2:0:0:0: [sdb] Write Protect is off
[  152.159387] sd 2:0:0:0: [sdb] Mode Sense: 23 00 00 00
[  152.160066] sd 2:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[  152.924036]  sdb: sdb1 sdb2 sdb3
[  152.926370] sd 2:0:0:0: [sdb] Attached SCSI removable disk

当我同时连接另一个 USB 时，它给出了这个

[  364.948449] scsi host3: usb-storage 1-1:1.0
[  366.206529] scsi 3:0:0:0: Direct-Access     SRT      USB              1100 PQ: 0 ANSI: 4
[  366.206834] sd 3:0:0:0: Attached scsi generic sg3 type 0
[  366.207126] sd 3:0:0:0: [sdc] 15818752 512-byte logical blocks: (8.10 GB/7.54 GiB)
[  366.207629] sd 3:0:0:0: [sdc] Write Protect is off
[  366.207631] sd 3:0:0:0: [sdc] Mode Sense: 43 00 00 00
[  366.208117] sd 3:0:0:0: [sdc] No Caching mode page found
[  366.208119] sd 3:0:0:0: [sdc] Assuming drive cache: write through
[  366.237610]  sdc: sdc1
[  366.239332] sd 3:0:0:0: [sdc] Attached SCSI removable disk

它没有用于 grep 的 USB 存储，因此即使我连接了 2 个 USB，图标也会消失。

当我连接一个 USB 便携式 2.5" 硬盘时，它给出了这个（我将尾部范围扩展到 -n 15）

[  659.426376] usb 1-3: Product: USB 3.0 Device
[  659.426377] usb 1-3: Manufacturer: USB 3.0 Device
[  659.426379] usb 1-3: SerialNumber: 00000000B032
[  659.433060] scsi host4: uas
[  659.433839] scsi 4:0:0:0: Direct-Access     WDC WD10 SPZX-00Z10T0     0117 PQ: 0 ANSI: 6
[  659.435213] sd 4:0:0:0: Attached scsi generic sg4 type 0
[  659.435840] sd 4:0:0:0: [sdd] 1953525168 512-byte logical blocks: (1.00 TB/932 GiB)
[  659.435842] sd 4:0:0:0: [sdd] 4096-byte physical blocks
[  659.436038] sd 4:0:0:0: [sdd] Write Protect is off
[  659.436041] sd 4:0:0:0: [sdd] Mode Sense: 53 00 10 08
[  659.436349] sd 4:0:0:0: [sdd] Disabling FUA
[  659.436351] sd 4:0:0:0: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[  659.436476] sd 4:0:0:0: [sdd] Optimal transfer size 33553920 bytes not a multiple of physical block size (4096 bytes)
[  659.578561]  sdd: sdd1
[  659.580012] sd 4:0:0:0: [sdd] Attached SCSI disk

USB 硬盘甚至没有用于 grep 的 USB 存储。

同样，当连接了 1 个闪存驱动器并且我重新启动时，图标没有显示，因为 dmesg 尾部是关于我的 wifi 已连接和网络管理器。

任何想法都可以改进此脚本，因为这不可靠。

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1 回答 1

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我在 linuxquestions.org 上找到了解决方案。

解决方案 -

#!/bin/bash

if [[ "$(udisksctl dump|awk -F':\n' -vRS= '/[ \t]*HintAuto:[ \t]*true/&&/\.Filesystem:/{print "found"}')" != "" ]]; then
    icon=" "
else
    icon=""
fi

printf "%s%s\\n" "$icon"
于 2020-07-03T18:39:08.627 回答