Add _require_kernel_config() and _has_kernel_config() helpers to check
whether a specific kernel configuration is enabled on the kernel.
Signed-off-by: Lukas Czerner <lczerner@xxxxxxxxxx>
---
common/config | 1 +
common/rc | 29 +++++++++++++++++++++++++++++
2 files changed, 30 insertions(+)
diff --git a/common/config b/common/config
index 164381b7..e0a5c5df 100644
--- a/common/config
+++ b/common/config
@@ -226,6 +226,7 @@ export OPENSSL_PROG="$(type -P openssl)"
export ACCTON_PROG="$(type -P accton)"
export E2IMAGE_PROG="$(type -P e2image)"
export BLKZONE_PROG="$(type -P blkzone)"
+export GZIP_PROG="$(type -P gzip)"
# use 'udevadm settle' or 'udevsettle' to wait for lv to be settled.
# newer systems have udevadm command but older systems like RHEL5 don't.
diff --git a/common/rc b/common/rc
index 0d261184..84154868 100644
--- a/common/rc
+++ b/common/rc
@@ -4703,6 +4703,35 @@ _require_names_are_bytes() {
esac
}
+_has_kernel_config()
+{
+ option=$1
+ uname=$(uname -r)
+ config_list="$KCONFIG_PATH
+ /proc/config.gz
+ /lib/modules/$uname/build/.config
+ /boot/config-$uname
+ /lib/kernel/config-$uname"
+
+ for config in $config_list; do
+ [ ! -f $config ] && continue
+ [ $config = "/proc/config.gz" ] && break
+ grep -qE "^${option}=[my]" $config
+ return
+ done
+
+ [ ! -f $config ] && _notrun "Could not locate kernel config file"
+
+ # We can only get here with /proc/config.gz
+ _require_command "$GZIP_PROG" gzip
+ $GZIP_PROG -cd $config | grep -qE "^${option}=[my]"
+}
+
+_require_kernel_config()
+{
+ _has_kernel_config $1 || _notrun "Installed kernel not built with $1"
+}
+
init_rc
################################################################################
--
2.31.1
