From 7d33058e9a945f1c9db684ae66cc058bc79972b7 Mon Sep 17 00:00:00 2001
From: Andrew Benson <abenson+void@gmail.com>
Date: Mon, 29 May 2023 10:38:49 -0500
Subject: [PATCH] base-files: add kernel hook for /boot freespace

---
 srcpkgs/base-files/files/50-bootsize.postinst | 22 +++++++++++++++++++
 srcpkgs/base-files/template                   |  4 +++-
 2 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 srcpkgs/base-files/files/50-bootsize.postinst

diff --git a/srcpkgs/base-files/files/50-bootsize.postinst b/srcpkgs/base-files/files/50-bootsize.postinst
new file mode 100644
index 000000000000..6a0b89e211ea
--- /dev/null
+++ b/srcpkgs/base-files/files/50-bootsize.postinst
@@ -0,0 +1,22 @@
+#!/bin/sh
+#
+# Kernel hook to check for filled /boot partitions
+#
+# Arguments passed to this script: $1 pkgname, $2 version.
+#
+PKGNAME="$1"
+VERSION="$2"
+
+# freespace = blocksize * freeblocks
+freespace=$(( $(stat -f -c %S /boot) * $(stat -f -c %f /boot) ))
+
+# freespace for /boot is <= 100MB
+if [ $freespace -le 104857600 ]; then
+	cat <<-'ENDMSG'
+	 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+	 * WARNING: /boot has less than 100MB available. Use `vkpurge` to ensure *
+	 * there will be sufficient space to write the next kernel and generate  *
+	 * its initrd. Your system may otherwise become unbootable.              *
+	 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+	ENDMSG
+fi
diff --git a/srcpkgs/base-files/template b/srcpkgs/base-files/template
index 27b83604b648..24c73001770e 100644
--- a/srcpkgs/base-files/template
+++ b/srcpkgs/base-files/template
@@ -1,7 +1,7 @@
 # Template file for 'base-files'
 pkgname=base-files
 version=0.143
-revision=1
+revision=2
 bootstrap=yes
 depends="xbps-triggers"
 short_desc="Void Linux base system files"
@@ -85,6 +85,8 @@ do_install() {
 	vbin ${FILESDIR}/vkpurge
 	vman ${FILESDIR}/vkpurge.8
 
+	vinstall ${FILESDIR}/50-bootsize.postinst 0755 etc/kernel.d/post-install 50-bootsize
+
 	vbin ${FILESDIR}/lsb_release
 
 	# Install default dracut configuration.