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Referenced these links with no success. Most of them seem to be ubuntu, gnome, and cron syntax specific.

  1. https://askubuntu.com/questions/298608/notify-send-doesnt-work-from-crontab/346580#346580
  2. https://stackoverflow.com/questions/16519673/cron-with-notify-send
  3. How can I get an alert when my battery is about to die in Linux Mint?

Tried export display, dbus, full command path.

Running Arch Linux with dwm. Using fcron and fcrontab -e.

fcrontab

@ 5s /usr/local/shsc/battlow

When I call the script explicitly it works as intended (/usr/shsc/battlow).

Script

#!/bin/sh

export DISPLAY=:0


battery_level=acpi -b | grep -P -o '[0-9]+(?=%)'
if [ $battery_level -le 100 ]; then
    notify-send "Battery low" "Battery level is ${battery_level}%!"
fi

Tried with and without the export DISPLAY=:0.

Verified display with

$ echo $DISPLAY
:0

# systemctl status fcron
● fcron.service - fcron periodical command scheduler
     Loaded: loaded (/usr/lib/systemd/system/fcron.service; enabled; vendor preset: disabled)
     Active: active (running) since Tue 2021-05-18 08:36:13 MST; 12min ago
   Main PID: 8778 (fcron)
      Tasks: 1 (limit: 18916)
     Memory: 2.3M
        CPU: 3.182s
     CGroup: /system.slice/fcron.service
             └─8778 /usr/bin/fcron -b

May 18 08:48:08 bar fcron[11367]: Job '/usr/local/shsc/battlow' started for user foo (pid 11372)
May 18 08:48:08 bar fcron[11367]: Job '/usr/local/shsc/battlow' completed
May 18 08:48:13 bar fcron[11383]: Job '/usr/local/shsc/battlow' started for user foo (pid 11388)
May 18 08:48:13 bar fcron[11383]: Job '/usr/local/shsc/battlow' completed
mcp
  • 717

0 Answers0