This patch is forcing systemd to do preset-all at boot time (first boot)
in a function that simulates 'preset-all' at rootfs time.
If we look at the comments above the changed line, we can see that the
/etc/machine-id file was deliberately created as empty, for the purpose
of making systemd not treat the system as first boot.
"""
# If we populate the systemd links we also create /etc/machine-id,
which
# allows systemd to boot with the filesystem read-only before
generating
# a real value and then committing it back.
#
# For the stateless configuration, where /etc is generated at runtime
# (for example on a tmpfs), this script shouldn't run at all and we
# allow systemd to completely populate /etc.
"""
I'm going to send out a patch to revert this patch.
Regards,
Qi
On 2/28/23 03:15, Marek Vasut wrote:
Instead of creating empty /etc/machine-id file using touch, write
text "uninitialized" into it. Systemd requires "uninitialized" in
the /etc/machine-id file to trigger systemd-firstboot .
Signed-off-by: Marek Vasut <ma...@denx.de>
---
Cc: Alexandre Belloni <alexandre.bell...@bootlin.com>
Cc: Armin Kuster <akuster...@gmail.com>
Cc: Bob Henz <robert_h...@jabil.com>
Cc: Kristian Klausen <krist...@klausen.dk>
Cc: Nick Potenski <nick.poten...@garmin.com>
Cc: Richard Purdie <richard.pur...@linuxfoundation.org>
---
meta/recipes-core/systemd/systemd-systemctl/systemctl | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/meta/recipes-core/systemd/systemd-systemctl/systemctl
b/meta/recipes-core/systemd/systemd-systemctl/systemctl
index cddae75a06..45b29671ee 100755
--- a/meta/recipes-core/systemd/systemd-systemctl/systemctl
+++ b/meta/recipes-core/systemd/systemd-systemctl/systemctl
@@ -302,7 +302,7 @@ def preset_all(root):
# For the stateless configuration, where /etc is generated at runtime
# (for example on a tmpfs), this script shouldn't run at all and we
# allow systemd to completely populate /etc.
- (root / SYSCONFDIR / "machine-id").touch()
+ (root / SYSCONFDIR / "machine-id").write_text("uninitialized")
def main():
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