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nixos/tests/systemd-boot: Preserve length in sed

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This commit is contained in:
Will Fancher
2026-07-14 02:32:42 -04:00
parent 35bc596317
commit 26482ee87c
1 changed files with 4 additions and 6 deletions
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10
nixos/tests/systemd-boot.nix
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@@ -460,19 +460,17 @@ in
nodes.machine = common;
testScript =
let
oldVersion = "222";
in
# python
''
machine.succeed("mount -o remount,rw /boot")
def switch():
# Replace version inside sd-boot with something older. See magic[] string in systemd src/boot/efi/boot.c
# Replace version inside sd-boot with something older. See SD_MAGIC in systemd src/boot/boot.c
# Note: the sed replacement has to be length-preserving, because section length matters.
machine.succeed(
"""
r"""
find /boot -iname '*boot*.efi' -print0 | \
xargs -0 -I '{}' sed -i 's/#### LoaderInfo: systemd-boot .* ####/#### LoaderInfo: systemd-boot ${oldVersion} ####/' '{}'
xargs -0 -I '{}' sed -i 's/#### LoaderInfo: systemd-boot [0-9]\(.*\) ####/#### LoaderInfo: systemd-boot 0\1 ####/' '{}'
"""
)
return machine.succeed("/run/current-system/bin/switch-to-configuration boot 2>&1")