From e9ed9c7a41bc03cc917a9a73bf3c5420de62ec9e Mon Sep 17 00:00:00 2001
From: Thomas Bellman <bellman@lysator.liu.se>
Date: Tue, 19 Dec 2017 15:21:00 +0100
Subject: [PATCH] Definition for managing kernel commandline options.
This adds a definition bootloader::kernel_option for managing kernel
command line options. The implementation is currently rudimentary,
and only support removing options when Grub 0.x is used; Grub 2.x or
setting options is not yet implemented.
---
manifests/grub0/kernel_option.pp | 43 ++++++++++++++++++++++++++++++++
manifests/kernel_option.pp | 42 +++++++++++++++++++++++++++++++
2 files changed, 85 insertions(+)
create mode 100644 manifests/grub0/kernel_option.pp
create mode 100644 manifests/kernel_option.pp
diff --git a/manifests/grub0/kernel_option.pp b/manifests/grub0/kernel_option.pp
new file mode 100644
index 0000000..578442f
--- /dev/null
+++ b/manifests/grub0/kernel_option.pp
@@ -0,0 +1,43 @@
+# Copyright © 2017 Thomas Bellman, Linköping, Sweden
+# Licensed under the GNU LGPL v3+; see the README file for more information.
+
+
+/*
+ * Internal helper for the bootloader::kernel_option definition.
+ */
+define bootloader::grub0::kernel_option($ensure, $value)
+{
+ $prefix = '^(\s*kernel\s(|.*\s))'
+ $suffix = '(|\s.*)$'
+ $qname = regexp_quote($name)
+
+ if ($ensure == 'absent')
+ {
+ regexp_replace_lines {
+ "bootloader::grub0::kernel_option::${name}":
+ file => '/boot/grub/grub.conf',
+ pattern => "${prefix}${qname}(=\\S*)?${suffix}",
+ # \1 is prefix, \4 is suffix
+ replacement => '\1\4';
+ }
+ }
+ elsif ($ensure != 'present')
+ {
+ fail("Bootloader::Grub0::Kernel_Option[${title}]: ",
+ "Bad ensure parameter, ${ensure}")
+ }
+ elsif ($value == true or $value == false)
+ {
+ # Detecting if the option is already present is not easily done
+ # using regexps...
+ fail("Bootloader::Grub0::Kernel_option[${title}]: ",
+ "Setting a kernel option is not yet implemented.")
+ }
+ else
+ {
+ # Detecting if the option is already present is not easily done
+ # using regexps...
+ fail("Bootloader::Grub0::Kernel_option[${title}]: ",
+ "Setting a kernel option is not yet implemented.")
+ }
+}
diff --git a/manifests/kernel_option.pp b/manifests/kernel_option.pp
new file mode 100644
index 0000000..5c896fb
--- /dev/null
+++ b/manifests/kernel_option.pp
@@ -0,0 +1,42 @@
+# Copyright © 2017 Thomas Bellman, Linköping, Sweden
+# Licensed under the GNU LGPL v3+; see the README file for more information.
+
+
+/*
+ * Set or remove a kernel commandline option.
+ *
+ * Which bootloader is in use will be guessed. The heuristics for that
+ * are not very good.
+ *
+ * Parameters:
+ * - name Kernel commandline option to set or remove.
+ *
+ * - ensure One of 'present' or 'absent'.
+ * Currently only 'absent' is implemented!
+ *
+ * - value The value to set the option to. If set to true or false,
+ * it will be a "bare" option, i.e. something like "single".
+ * If a string, a valued option will be set, i.e. something
+ * like "console=ttyS0".
+ * Since only ensure => absent is implemented, the value
+ * parameter is currently ignored.
+ */
+define bootloader::kernel_option($ensure='present', $value=undef)
+{
+ include bootloader::guess
+
+ $bootloader = $bootloader::guess::bootloader
+ case $bootloader
+ {
+ 'grub0': {
+ bootloader::grub0::kernel_option {
+ $title:
+ name => $name, ensure => $ensure, value => $value;
+ }
+ }
+ default: {
+ fail("Bootloader::Kernel_option[${title}]: ",
+ "Unsupported bootloader, ${bootloader}")
+ }
+ }
+}
--
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