如何每 5 秒运行一次脚本？

Question

Marius Biegger

Asked: 2020-04-21 12:28:55 +0800 CST2020-04-21 12:28:55 +0800 CST 2020-04-21 12:28:55 +0800 CST

udev 规则运行的脚本失败

772

我正在运行Ubuntu 18.4，我遇到了一个脚本问题，该脚本在udev rule触发时拒绝运行。

这是情况：我在 Surface Pro 4 上运行。该设备有一个可拆卸的键盘。我运行一个名为libinput-gestures的软件。每当键盘分离并重新连接时，手势将不起作用。手动修复很容易：

libinput-gestures-setup restart

所以我尝试运行的脚本正是这样做的。这是它的全部荣耀：

#!/bin/sh

libinput-gestures-setup restart

我想在 udev 规则的add事件上运行它。这是 .rules 文件：

ACTION=="add", ATTRS{idVendor}=="045e", ATTRS{idProduct}=="07e8", RUN+="/home/$myuser/.bin/gestures-restart"

并在连接键盘后找到脚本工作正常。但这是记录的内容：

Apr 20 22:20:51 mb-Surface-Pro-4 kernel: [ 2248.005043] usb 1-7: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Apr 20 22:20:51 mb-Surface-Pro-4 kernel: [ 2248.005047] usb 1-7: Product: Surface Type Cover
Apr 20 22:20:51 mb-Surface-Pro-4 kernel: [ 2248.005050] usb 1-7: Manufacturer: Microsoft
Apr 20 22:20:51 mb-Surface-Pro-4 kernel: [ 2248.013813] input: Microsoft Surface Type Cover Keyboard as /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/0003:045E:07E8.000D/input/input95
Apr 20 22:20:51 mb-Surface-Pro-4 kernel: [ 2248.072209] input: Microsoft Surface Type Cover Consumer Control as /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/0003:045E:07E8.000D/input/input97
Apr 20 22:20:51 mb-Surface-Pro-4 kernel: [ 2248.072444] input: Microsoft Surface Type Cover Touchpad as /devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/0003:045E:07E8.000D/input/input99
Apr 20 22:20:51 mb-Surface-Pro-4 kernel: [ 2248.072881] hid-multitouch 0003:045E:07E8.000D: input,hiddev1,hidraw2: USB HID v1.11 Keyboard [Microsoft Surface Type Cover] on usb-0000:00:14.0-7/input0
Apr 20 22:20:51 mb-Surface-Pro-4 mtp-probe: checking bus 1, device 11: "/sys/devices/pci0000:00/0000:00:14.0/usb1/1-7"
Apr 20 22:20:51 mb-Surface-Pro-4 mtp-probe: bus: 1, device: 11 was not an MTP device
Apr 20 22:20:51 mb-Surface-Pro-4 systemd-udevd[5965]: Process '/home/mariusb/.bin/gestures-restart' failed with exit code 1.
Apr 20 22:20:51 mb-Surface-Pro-4 systemd-udevd[5965]: message repeated 2 times: [ Process '/home/mariusb/.bin/gestures-restart' failed with exit code 1.]
Apr 20 22:20:51 mb-Surface-Pro-4 systemd-udevd[5982]: Process '/home/mariusb/.bin/gestures-restart' failed with exit code 1.
Apr 20 22:20:51 mb-Surface-Pro-4 systemd-udevd[5993]: Process '/home/mariusb/.bin/gestures-restart' failed with exit code 1.
Apr 20 22:20:51 mb-Surface-Pro-4 systemd-udevd[5965]: Process '/home/mariusb/.bin/gestures-restart' failed with exit code 1.
Apr 20 22:20:51 mb-Surface-Pro-4 systemd-udevd[5992]: Process '/home/mariusb/.bin/gestures-restart' failed with exit code 1.
Apr 20 22:20:51 mb-Surface-Pro-4 systemd-udevd[5991]: Process '/home/mariusb/.bin/gestures-restart' failed with exit code 1.
Apr 20 22:20:51 mb-Surface-Pro-4 systemd-udevd[5982]: Process '/home/mariusb/.bin/gestures-restart' failed with exit code 1.
Apr 20 22:20:51 mb-Surface-Pro-4 systemd-udevd[6011]: Process '/home/mariusb/.bin/gestures-restart' failed with exit code 1.
Apr 20 22:20:51 mb-Surface-Pro-4 systemd-udevd[5965]: Process '/home/mariusb/.bin/gestures-restart' failed with exit code 1.
Apr 20 22:20:51 mb-Surface-Pro-4 systemd-udevd[5992]: Process '/home/mariusb/.bin/gestures-restart' failed with exit code 1.
Apr 20 22:20:51 mb-Surface-Pro-4 systemd-udevd[5993]: Process '/home/mariusb/.bin/gestures-restart' failed with exit code 1.
Apr 20 22:20:51 mb-Surface-Pro-4 systemd-udevd[5991]: Process '/home/mariusb/.bin/gestures-restart' failed with exit code 1.
Apr 20 22:20:51 mb-Surface-Pro-4 systemd-udevd[6015]: Process '/home/mariusb/.bin/gestures-restart' failed with exit code 1.
Apr 20 22:20:51 mb-Surface-Pro-4 upowerd[868]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/0003:045E:07E8.000D
Apr 20 22:20:51 mb-Surface-Pro-4 upowerd[868]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0
Apr 20 22:20:51 mb-Surface-Pro-4 upowerd[868]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:14.0/usb1/1-7

所以看起来脚本是这里的问题。这就是我需要帮助的地方，因为我不明白出了什么问题。

作为附加信息：当我安装 libinput 时，我必须将我的用户添加到组libinput。也许与此有关

无论如何，非常感谢提前

编辑： 这似乎与用户未运行的脚本有关。journalctl -xe 打印以下内容：

-- Unit gestures-restart.service has begun starting up.
Apr 20 23:05:44 mb-Surface-Pro-4 gestures-restart[3550]: Non-installation commands must be run as your own user.
Apr 20 23:05:44 mb-Surface-Pro-4 systemd[1]: gestures-restart.service: Main process exited, code=exited, status=1/FAILURE
Apr 20 23:05:44 mb-Surface-Pro-4 systemd[1]: gestures-restart.service: Failed with result 'exit-code'.
Apr 20 23:05:44 mb-Surface-Pro-4 systemd[1]: Failed to start Restart gestures.
-- Subject: Unit gestures-restart.service has failed
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
-- 
-- Unit gestures-restart.service has failed.
-- 
-- The result is RESULT.

有人现在如何解决这个问题吗？

编辑/更新 2：

我得到了检测键盘连接的服务。它运行良好并根据需要执行重新启动脚本。所以要保持最新：这是我现在的服务：

[Unit]
Description=Service for restarting gestures
Requires=dev-input-by\x2dpath-pci\x2d0000:00:14.0\x2dusb\x2d0:7:1.0\x2devent\x2dmouse.device
After=dev-input-by\x2dpath-pci\x2d0000:00:14.0\x2dusb\x2d0:7:1.0\x2devent\x2dmouse.device

[Service]
Type=simple
User=$user
ExecStart=/home/$user/.bin/gestures-restart.sh

[Install]
WantedBy=dev-input-by\x2dpath-pci\x2d0000:00:14.0\x2dusb\x2d0:7:1.0\x2devent\x2dmouse.device

libinput-gestures -l 提供有关应用程序的一些信息，其中之一是：

libinput-gestures: device /dev/input/by-path/pci-0000:00:14.0-usb-0:7:1.0-event-mouse(event6): Microsoft Surface Type Cover Touchpad

据我了解，这是软件用作输入的设备。所以我使用systemctl list-units并找到了这个设备：

sys-devices-pci0000:00-0000:00:14.0-usb1-1\x2d7-1\x2d7:1.0-0003:045E:07E8.0004-input-input29-event6.device

（我通过 event6 属性识别它）并将其用于服务 REQUIRE/AFTER...

到目前为止，这一切看起来都很好。当我分离并重新连接键盘 journalctl -xe 时输出以下内容：

Apr 21 15:22:13 mb-Surface-Pro-4 systemd[1]: Found device Surface_Type_Cover.
-- Subject: Unit dev-input-by\x2dpath-pci\x2d0000:00:14.0\x2dusb\x2d0:7:1.0\x2devent\x2dmouse.device has finished start-up
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
-- 
-- Unit dev-input-by\x2dpath-pci\x2d0000:00:14.0\x2dusb\x2d0:7:1.0\x2devent\x2dmouse.device has finished starting up.
-- 
-- The start-up result is RESULT.
Apr 21 15:22:13 mb-Surface-Pro-4 upowerd[886]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0/0003:045E:07E8.0011
Apr 21 15:22:13 mb-Surface-Pro-4 systemd[1]: Started Service for restarting gestures.
-- Subject: Unit gestures-restart.service has finished start-up
-- Defined-By: systemd
-- Support: http://www.ubuntu.com/support
-- 
-- Unit gestures-restart.service has finished starting up.
-- 
-- The start-up result is RESULT.
Apr 21 15:22:13 mb-Surface-Pro-4 upowerd[886]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:14.0/usb1/1-7/1-7:1.0
Apr 21 15:22:13 mb-Surface-Pro-4 upowerd[886]: unhandled action 'bind' on /sys/devices/pci0000:00/0000:00:14.0/usb1/1-7
Apr 21 15:22:13 mb-Surface-Pro-4 gestures-restart.sh[5532]: libinput-debug-events stopped.
Apr 21 15:22:13 mb-Surface-Pro-4 gestures-restart.sh[5532]: libinput-gestures stopped.

如图所示，服务识别连接并启动脚本。脚本然后运行它的停止功能，但它不会再次启动。我知道这可能超出了此问题的范围，但您是否看到明显的原因？谢谢：）

最后更新

我联系了该实用程序的开发人员。启动操作很可能会失败，因为应用程序需要在实际的用户会话中运行。不是通过系统服务。谢谢你的时间。

2 个回答

Voted

user986805 · Answer 1 · 2020-04-21T14:38:03+08:00

方法一：

$ cat 99-logitech-custom.rules

# Start autorun systemd .service
ACTION=="add", \
SUBSYSTEMS=="input", \
ATTR{name}=="Logitech Performance MX", \
TAG+="systemd", ENV{SYSTEMD_USER_WANTS}="logitech_custom.service"

^{用于udevadm control --reload && udevadm trigger重新加载 udev。}

...和一个简单的 oneshot systemd .service

$ cat ~/.config/systemd/user/logitech_custom.service

Description=Autorun actions for Logitech

[Service]
Type=oneshot
ExecStart=/opt/bin/autorun_logitech.sh

^{您无需启动或启用 .service。}

方法二

连接您的设备时，它应该在systemctl list-units列表中可见（如果它没有作为一个单元显示，您需要先 TAG+= 您的设备，与第一种方法基本相同，但没有 env{systemd...}）。现在您可以使用此单元名称udevadm info $(systemd-escape -u '<unit>' --path | sed 's/.device$//')来获取DEVLINKS=，再次运行它systemd-escape '<devlink>' --path --suffix=device以获取转义的 .device 名称。

$ cat ~/.config/systemd/user/logitech_custom.service

[Unit]
Description=Autorun actions for Logitech mouse
Requires=dev-input-by\x2did-usb\x2dLogitech_USB_Receiver\x2dif02\x2dmouse.device
After=dev-input-by\x2did-usb\x2dLogitech_USB_Receiver\x2dif02\x2dmouse.device

[Service]
ExecStart=/opt/bin/autorun_logitech.sh

[Install]
WantedBy=dev-input-by\x2did-usb\x2dLogitech_USB_Receiver\x2dif02\x2dmouse.device

...最后启用您的 systemd .service

$ systemctl --user enable logitech_custom.service

Marius Biegger · Answer 2 · 2020-08-28T23:59:15+08:00

Best Answer

Marius Biegger

2020-08-28T23:59:15+08:002020-08-28T23:59:15+08:00

因此，这里有一些延迟是关于如何解决这类问题的建议。

首先，您应该阅读所有该主题及其评论，因为它可以深入了解如何设置

已检测到正确的 D-Bus 消息并相应地启动脚本。但是 libinput-gestures 仍然存在问题，因为它能够停止但不能再次启动！问题是脚本作为系统运行重新启动操作。但是要启动，libinput-gestures 需要一个用户会话，因此脚本必须由用户运行。

为此，libinput 的创建者创建了一个单独的工具。dbus 动作。我无法测试此应用程序，因为我的操作系统不符合所需的环境。但我希望你可以使用它:)

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