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loader: lua: test that /boot exists first

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Otherwise on fs like tftp where no directory listing is possible we fail
on the .dir method.

Reviewed by:	imp, kevans
MFC after:	2 weeks
Sponsored by:	Beckhoff Automation GmbH & Co. KG
Differential Revision:	https://reviews.freebsd.org/D33414

(cherry picked from commit c4dc907254)
This commit is contained in:
Emmanuel Vadot 2021-12-13 14:18:12 +01:00
parent c95afea4a8
commit 28d2b8b700
1 changed files with 7 additions and 0 deletions
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7
stand/lua/core.lua
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@ -229,6 +229,13 @@ function core.kernelList()
end
end
-- Do not attempt to autodetect if underlying filesystem
-- do not support directory listing (e.g. tftp, http)
if not lfs.attributes("/boot", "mode") then
autodetect = "no"
loader.setenv("kernels_autodetect", "NO")
end
-- Base whether we autodetect kernels or not on a loader.conf(5)
-- setting, kernels_autodetect. If it's set to 'yes', we'll add
-- any kernels we detect based on the criteria described.