commit 8660e7795f8d8be00372a1e725fe68f29b2c0fb4
author Andrew Jeffery <andrew@aj.id.au> Fri Jan 14 21:59:15 2022 +1030
committer Andrew Jeffery <andrew@aj.id.au> Fri Jan 21 10:14:58 2022 +1030
tree 552c156e2f7e322d33e52f23ad708a5310f8f8d6
parent d1c5dd1ae54b7afa7f0f3cc85c6ce279f35f0c80

systemd: Configure command-line using the environment

The existing behaviour remains the default but can be modified by
dropping in an environment file into /etc/default.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: Icbeac6ea60bf76c98eaa03f4e5f2ecf0ddc2733d

systemd/system/debug-trigger@.service

diff --git a/systemd/system/debug-trigger@.service b/systemd/system/debug-trigger@.service
index 6e40474..2a5e085 100644
--- a/systemd/system/debug-trigger@.service
+++ b/systemd/system/debug-trigger@.service
@@ -4,4 +4,6 @@
 
 [Service]
 Type=simple
-ExecStart=/usr/bin/debug-trigger /%I /proc/sysrq-trigger
+Environment=DEBUG_TRIGGER_OPTIONS= DEBUG_TRIGGER_SOURCE=/%I DEBUG_TRIGGER_SINK=/proc/sysrq-trigger
+EnvironmentFile=-/etc/default/debug-trigger
+ExecStart=/usr/bin/debug-trigger $DEBUG_TRIGGER_OPTIONS $DEBUG_TRIGGER_SOURCE $DEBUG_TRIGGER_SINK