efi: allow ESP validity checks to be turned off

let's add an env var for this, as this really shouldn't be a top-level
feature, as it turning off the validity checks certainly isn't
advisable.

Fixes: #4925

1 files changed, 7 insertions, 0 deletions

diff --git a/docs/ENVIRONMENT.md b/docs/ENVIRONMENT.md
index b4363ba58b..016a89787d 100644
--- a/docs/ENVIRONMENT.md
+++ b/docs/ENVIRONMENT.md
@@ -112,6 +112,13 @@ systemd-timedated:
   first existing unit listed in the environment variable, and
   `timedatectl set-ntp off` disables and stops all listed units.
 
+bootctl and other tools that access the EFI System Partition (ESP):
+
+* `$SYSTEMD_RELAX_ESP_CHECKS=1` — if set, the ESP validation checks are
+  relaxed. Specifically, validation checks that ensure the specified ESP path
+  is a FAT file system are turned off, as are checks that the path is located
+  on a GPT partition with the correct type UUID.
+
 systemd itself:
 
 * `$SYSTEMD_ACTIVATION_UNIT` — set for all NSS and PAM module invocations that