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| author | Wynn Wolf Arbor | 2020-06-04 14:50:18 +0200 |
|---|---|---|
| committer | Wynn Wolf Arbor | 2020-06-04 15:59:33 +0200 |
| commit | 344f0f271daac9ad77c5b1da2ed59c3a3e394e13 (patch) | |
| tree | a669447aeaa08b29f4420c35f9729a37c995ddeb /kern.1 | |
| parent | 1c5a81df33ddbc0fda4bfb64ae9def531c213743 (diff) | |
| download | kern-344f0f271daac9ad77c5b1da2ed59c3a3e394e13.tar.gz | |
Use configuration file under /boot instead of /proc/config.gz
kern(1) has been using /proc/config.gz as the source of the currently
running kernel's config since its initial commit. Whilst this location
is convenient because of its static nature, it does need a specific
kernel option, IKCONFIG_PROC, to be set.
Furthermore, it introduces a dependency on gzip(1) to decompress the
file on the fly. Consequently, we need to stream gzip's output to
commands or save it in a temporary file to access it neatly.
Since Gentoo's default install script for the kernel, installkernel(8),
places each kernel's configuration file in /boot, we can use this
location to retrieve the currently running kernel's configuration
instead and work around all of the above limitations.
Of course we need to make sure that /boot is mounted before we try
accessing any configuration files on there. We use the already existing
code from install_kernel() for that.
Diffstat (limited to '')
| -rw-r--r-- | kern.1 | 7 |
1 files changed, 3 insertions, 4 deletions
@@ -1,4 +1,4 @@ -.Dd May 16, 2020 +.Dd June 4, 2020 .Dt KERN 1 .Os .Sh NAME @@ -103,9 +103,8 @@ to display the differences between the generated kernel configuration and .Pp If no config is given, this command compares against the configuration of the currently running kernel. -This requires -.Sy IKCONFIG_PROC -to be enabled. +This requires the configuration file to be present under +.Pa /boot . .It Sy build Builds the selected kernel. .It Sy install |