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使用systemd计时器更改背景壁纸

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使用systemd计时器更改背景壁纸

我正在尝试使用 systemd 计时器来更改我的背景壁纸，但它似乎没有达到我想要的效果。

下面我列出了我拥有的相关文件和输出。

bgchange.计时器

[Unit]
Description=Timer for background change

[Timer]
OnUnitActiveSec=10sec
OnActiveSec=5sec
OnBootSec=1sec
Persistent=true

[Install]
WantedBy=timers.target

bgchange.service

[Unit]
Description=Change background image periodically

[Service]
Type=oneshot
Environment=DISPLAY=:0
ExecStart=/home/emobe/scripts/changebg.sh

/home/emobe/scripts/changebg.sh

#!/bin/bash
feh --no-fehbg --bg-scale --randomize /home/emobe/Pictures/wallpapers/*

bgchange.计时器状态

● bgchange.timer - Timer for background change
     Loaded: loaded (/etc/systemd/system/bgchange.timer; enabled; preset: disabled)
     Active: active (waiting) since Fri 2023-01-06 09:33:44 GMT; 4h 12min ago
      Until: Fri 2023-01-06 09:33:44 GMT; 4h 12min ago
    Trigger: Fri 2023-01-06 13:46:24 GMT; 4s left
   Triggers: ● bgchange.service

systemctl 列表定时器

Fri 2023-01-06 17:39:24 GMT 3h 52min left Thu 2023-01-05 23:57:47 GMT 13h ago            updatedb.timer                   updatedb.service
Sat 2023-01-07 00:00:00 GMT 10h left      Fri 2023-01-06 00:00:01 GMT 13h ago            logrotate.timer                  logrotate.service
Sat 2023-01-07 00:00:00 GMT 10h left      Fri 2023-01-06 00:00:01 GMT 13h ago            shadow.timer                     shadow.service
Sat 2023-01-07 09:48:44 GMT 20h left      Fri 2023-01-06 09:48:44 GMT 3h 58min ago       systemd-tmpfiles-clean.timer     systemd-tmpfiles-clean.service
Sat 2023-01-07 09:54:52 GMT 20h left      Fri 2023-01-06 00:34:15 GMT 13h ago            man-db.timer                     man-db.service
Sat 2023-01-07 15:00:00 GMT 1 day 1h left Tue 2022-12-06 22:57:11 GMT 1 month 0 days ago pamac-cleancache.timer           pamac-cleancache.service
Thu 2023-01-12 08:45:44 GMT 5 days left   Thu 2023-01-05 23:57:47 GMT 13h ago            pamac-mirrorlist.timer           pamac-mirrorlist.service
Thu 2023-01-12 20:26:18 GMT 6 days left   Fri 2023-01-06 00:25:48 GMT 13h ago            archlinux-keyring-wkd-sync.timer archlinux-keyring-wkd-sync.service
-                           -             Fri 2023-01-06 13:46:53 GMT 74ms ago           bgchange.timer                   bgchange.service

答案1

DISPLAY您应该将它们作为用户服务/计时器运行...然后您就不需要在服务文件中设置，例如

[Unit]
Description=Change background image periodically

[Service]
ExecStart=/home/emobe/scripts/changebg.sh

应该足够了。systemd通常会放入用户文件~/.config/systemd/user/，因此请将它们放在那里

~/.config/systemd/user/bgchange.timer
~/.config/systemd/user/bgchange.service

然后以普通用户身份运行

systemctl --user daemon-reload
systemctl --user enable --now bgchange.timer

检查计时器是否处于活动状态，始终为--user：

systemctl --user list-timers

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