diff options
author | Kyle Evans <kevans@FreeBSD.org> | 2023-12-13 16:52:14 +0000 |
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committer | Kyle Evans <kevans@FreeBSD.org> | 2023-12-13 16:52:14 +0000 |
commit | d04415c520b031fb8eb93cb252e4acee66149c87 (patch) | |
tree | d981c487be759fdbf0f277931f5e4e340fefdd3b | |
parent | a206524709bdfbd577bcfe76676da80b8250f84c (diff) | |
download | src-d04415c520b031fb8eb93cb252e4acee66149c87.tar.gz src-d04415c520b031fb8eb93cb252e4acee66149c87.zip |
loader: lua: remove the default kernel if it doesn't exist
The `kernel` env var provides the default kernel, usually "kernel". It
may be the case that the user doesn't have a "kernel" kernel, just
"kernel.*" kernels, but have left `kernel` to the default because we
autodetect entries by default anyways.
If we're doing autodetection, take note of whether the default kernel
exists or not and remove it from the list if it doesn't and we had found
any other kernels. We avoid it in the #kernels == 1 case because
something fishy has likely happened and we should just trust the
configuration.
Reviewed by: imp, manu
Differential Revision: https://reviews.freebsd.org/D42967
-rw-r--r-- | stand/lua/core.lua | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/stand/lua/core.lua b/stand/lua/core.lua index c7581b296b8f..9226de564348 100644 --- a/stand/lua/core.lua +++ b/stand/lua/core.lua @@ -201,17 +201,18 @@ function core.kernelList() return core.cached_kernels end - local k = loader.getenv("kernel") + local default_kernel = loader.getenv("kernel") local v = loader.getenv("kernels") local autodetect = loader.getenv("kernels_autodetect") or "" local kernels = {} local unique = {} local i = 0 - if k ~= nil then + + if default_kernel then i = i + 1 - kernels[i] = k - unique[k] = true + kernels[i] = default_kernel + unique[default_kernel] = true end if v ~= nil then @@ -239,6 +240,8 @@ function core.kernelList() return core.cached_kernels end + local present = {} + -- Automatically detect other bootable kernel directories using a -- heuristic. Any directory in /boot that contains an ordinary file -- named "kernel" is considered eligible. @@ -267,8 +270,25 @@ function core.kernelList() unique[file] = true end + present[file] = true + ::continue:: end + + -- If we found more than one kernel, prune the "kernel" specified kernel + -- off of the list if it wasn't found during traversal. If we didn't + -- actually find any kernels, we just assume that they know what they're + -- doing and leave it alone. + if default_kernel and not present[default_kernel] and #kernels > 1 then + for i = 1, #kernels do + if i == #kernels then + kernels[i] = nil + else + kernels[i] = kernels[i + 1] + end + end + end + core.cached_kernels = kernels return core.cached_kernels end |