[PATCH v3 06/13] add helper functions to get kernel path by kernel release and the path of current running kernel
grubby --info=kernel-path or --add-kernel=kernel-path accepts a kernel
path (e.g. /boot/vmlinuz-5.14.14-200.fc34.x86_64) instead of kernel release
(e.g 5.14.14-200.fc34.x86_64). So we need to know the kernel path given
a kernel release. Although for Fedora/RHEL, the kernel path is
"/boot/vmlinuz-<KERNEL_RELEASE>", a path kernel could also be
/boot/<machine-id>/<KERNEL_RELEASE>/vmlinuz. So the most reliable way to
find the kernel path given a kernel release is to use "grubby --info".
Note these helper functions doesn't support CoreOS/Atomic/Silverblue
since grubby isn't used by them.
Signed-off-by: Coiby Xu <coxu(a)redhat.com>
---
kdumpctl | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/kdumpctl b/kdumpctl
index c6046dc..c01f8ae 100755
--- a/kdumpctl
+++ b/kdumpctl
@@ -1351,6 +1351,36 @@ get_dump_mode_by_kernel()
fi
}
+_filter_grubby_kernel_str()
+{
+ local _grubby_kernel_str=$1
+ echo -n "$_grubby_kernel_str" | sed -n -e
's/^kernel="\(.*\)"/\1/p'
+}
+
+_find_kernel_path_by_release()
+{
+ local _release="$1" _grubby_kernel_str _kernel_path
+ _grubby_kernel_str=$(grubby --info ALL | grep "^kernel=.*$_release")
+ _kernel_path=$(_filter_grubby_kernel_str "$_grubby_kernel_str")
+ if [[ ! -e "$_kernel_path" ]]; then
+ derror "kernel $_release doesn't exist"
+ return 1
+ fi
+ echo -n "$_kernel_path"
+}
+
+_get_current_running_kernel_path()
+{
+ local _release _path
+
+ _release=$(uname -r)
+ if _path=$(_find_kernel_path_by_release "$_release"); then
+ echo -n "$_path"
+ else
+ return 1
+ fi
+}
+
reset_crashkernel()
{
local kernel=$1 entry crashkernel_default
--
2.31.1