system/syslinux: bring over from aports fork

system/syslinux/APKBUILD

+# Maintainer: Natanael Copa <ncopa@alpinelinux.org>
+pkgname=syslinux
+pkgver=6.04_pre1
+pkgrel=2
+_ver=${pkgver/_/-}
+pkgdesc="Boot loader for the Linux operating system"
+url="http://syslinux.org"
+arch="x86 x86_64"
+license="GPL"
+makedepends="linux-headers nasm perl util-linux-dev gnu-efi-dev"
+depends="mtools blkid mawk"
+triggers="syslinux.trigger=/boot"
+install="syslinux.post-upgrade"
+options="!check textrels"  # does not ship tests in tarball
+ldpath="/usr/share/syslinux"
+
+source="https://www.kernel.org/pub/linux/utils/boot/syslinux/Testing/${pkgver%_pre*}/syslinux-$_ver.tar.xz
+	update-extlinux.conf
+	update-extlinux
+	"
+subpackages="$pkgname-doc $pkgname-dev"
+
+_loaderarch=
+case "$CARCH" in
+x86)	_loaderarch=efi32;;
+x86_64)	_loaderarch=efi64;;
+esac
+
+builddir="$srcdir"/$pkgname-$_ver
+prepare() {
+	cd "$builddir"
+	for i in $source; do
+		i=${i%%::*}
+		case "$i" in
+		*.patch) msg $i; patch -p1 -i "$srcdir"/$i || return 1;;
+		esac
+	done
+}
+
+build() {
+	cd "$builddir"
+	unset LDFLAGS
+	make $_loaderarch installer || return 1
+}
+
+package() {
+	cd "$builddir"
+	make -j1 INSTALLROOT="$pkgdir" MANDIR=/usr/share/man \
+		bios $_loaderarch install || return 1
+
+	mkdir -p "$pkgdir"/etc/update-extlinux.d
+	cp "$srcdir"/update-extlinux.conf "$pkgdir"/etc/
+	sed "/^version=/s/=.*/=$pkgver-r$pkgrel/" "$srcdir"/update-extlinux \
+		> "$pkgdir"/sbin/update-extlinux
+	chmod 755 "$pkgdir"/sbin/update-extlinux
+}
+
+sha512sums="7927dd39be8e2dcf4138a6fea33def67d19d938379d694f15b48fdd2f5924c028b7a9e7bd71d0c7c6630c203e9e2a54296628e530632ad5e6f55b1ebefe8fc98  syslinux-6.04-pre1.tar.xz
+9071be450e543597f6f95b9a5811869c5351a71f4c42f7879b9f7ec1b13e2e4d455e9f2900e3897d5e5870bd87c934b7168328186c5f17631f2b09a524e10a1a  update-extlinux.conf
+23fd69b5f42af063744289f64e60eddd0fa35db83d988b24635e6eb47b5c8fada8585c9aea60f398cfc1e5be8565230a81192d71df705368a90e0927f35fb60d  update-extlinux"

system/syslinux/syslinux.post-upgrade

+#!/bin/sh
+
+# find given append opt
+get_append_opt() {
+	awk -v search="$1" '
+		$1 == "append" || $1 == "APPEND" {
+		        split($0, a);
+		        for (i in a) {
+		                if (index(a[i], search) == 1) {
+	        	                print a[i];
+				}	
+			}
+		}' /boot/extlinux.conf | sort | uniq
+}
+
+# print default kernel options
+get_default_opts() {
+	awk '
+		$1 == "append" || $1 == "APPEND" {
+			opts="";
+			space="";
+		        split($0, a);
+		        for (i in a) {
+		                if (i != 1 \
+				    && (index(a[i], "root=") != 1) \
+				    && (index(a[i], "initrd=") != 1) \
+				    && (index(a[i], "modules=") != 1)) {
+	        	                opts = opts space a[i];
+					space = " ";
+				}
+			}
+			print opts;
+		}
+		' /boot/extlinux.conf | sort | uniq
+}
+
+if ! [ -f /boot/extlinux.conf ]; then
+	exit 0
+fi
+
+# check if we already have a generated extlinux.conf
+if grep -q '^# Generated by update-extlinux' /boot/extlinux.conf; then
+	exit 0
+fi
+
+# try fish out the kernel opts from extlinuix.conf's append line
+root=$(get_append_opt 'root=' | head -n 1)
+modules=$(get_append_opt 'modules=' | head -n 1)
+opts=$(get_default_opts | head -n 1)
+
+# populate update-extlinux.conf with the info we know
+if [ -n "$root" ]; then
+	sed -i -e "/^root=/s|.*|$root|g" /etc/update-extlinux.conf
+fi
+if [ -n "$modules" ]; then
+	sed -i -e "/^modules=/s|.*|$modules|g" /etc/update-extlinux.conf
+fi
+if [ -n "$opts" ]; then
+	sed -i -e "/^default_kernel_opts=/s|.*|default_kernel_opts=\"$opts\"|g" /etc/update-extlinux.conf
+fi
+

system/syslinux/syslinux.trigger

+#!/bin/sh
+
+update-extlinux --warn-only

system/syslinux/update-extlinux

+#!/bin/sh
+
+version=
+default=0
+timeout=5
+verbose=0
+
+conf=/boot/extlinux.conf
+myconf=/etc/update-extlinux.conf
+
+# read in extlinux settings
+if [ -f "$myconf" ]; then
+	. $myconf
+fi
+
+everbose() {
+	if [ "$verbose" = "0" ]; then
+		return
+	fi
+
+	echo $*
+}
+
+ewarn() {
+	echo "WARNING:" $@ >&2
+}
+
+eerror() {
+	echo "ERROR:" $@ >&2
+	return 1
+}
+
+usage() {
+	echo "usage: $0 [-v|--verbose] [--warn-only]"
+}
+
+while [ $# -gt 0 ]; do
+	opt="$1"
+	shift
+	case "$opt" in
+	-v|--verbose)
+		verbose=1
+		;;
+	--warn-only)
+		warn_only=1
+		;;
+	--)
+		break
+		;;
+	-*)
+		usage
+		exit 1
+		;;
+	esac
+done
+
+everbose "Updating extlinux configuration."
+
+if [ "x$root" = "x" ]; then
+	ewarn "Root device is not specified in $myconf."
+	blkid_export=$(blkid -o export /dev/root)
+	if [ -n "$blkid_export" ]; then
+		export $blkid_export
+	fi
+	if [ -z "$UUID" ]; then
+		# try parse /proc/mount for mounted /
+		dev=$(awk '$2 == "/" {dev=$1} END {print dev}' /proc/mounts)
+		if [ -n "$dev" ]; then
+			blkid_export=$(blkid -o export $dev)
+			if [ -n "$blkid_export" ]; then
+				export "$blkid_export"
+			fi
+		fi
+	fi
+	if [ -z "$UUID" ]; then
+		if [ -z "$dev" ]; then
+			if [ -n "$warn_only" ]; then
+				ewarn "Failed to detect root device. extlinux.conf is not updated"
+				exit 0
+			else
+				eerror "Failed to detect root device"
+				exit 1
+			fi
+		else
+			root=$dev
+		fi
+	else
+		root=UUID=$UUID
+	fi
+	everbose "Root device is: $root"
+fi
+
+rtimeout=$(( ${timeout} * 10 ))
+syslinux_menu=menu.c32
+menu_hidden=
+
+# vesa menu has been requested?
+if [ "$vesa_menu" = "1" ]; then
+	syslinux_menu=vesamenu.c32
+fi
+
+umask 0022
+rm -f $conf.new
+echo "# Generated by update-extlinux $version" > $conf.new
+if [ -n "$serial_port" ]; then
+	echo "SERIAL $serial_port ${serial_baud:-115200}" >> $conf.new
+fi
+echo "DEFAULT $syslinux_menu" >> $conf.new
+echo "PROMPT 0" >> $conf.new
+echo "MENU TITLE Addelie $(uname -s) Boot Menu" >> $conf.new
+if [ "$hidden" = "1" ]; then
+	echo "MENU HIDDEN" >> $conf.new
+fi
+echo "MENU AUTOBOOT Adelie will be booted automatically in # seconds." >> $conf.new
+echo "TIMEOUT $rtimeout" >> $conf.new
+
+lst=0
+if [ -f "/boot/xen.gz" ]; then
+	for kernel in $(find /boot -name "vmlinuz-*" -type f); do
+		tag=$(basename $kernel | cut -b9-)
+		everbose "Found Xen hypervisor: /boot/xen.gz, kernel: $kernel"
+
+		if [ -f "/boot/initramfs-$tag" ]; then
+			everbose "Found initramfs: /boot/initramfs-$tag"
+			initramfs="initramfs-$tag"
+		else
+			initramfs=
+		fi
+		label=xen-$(grep -w -l $tag /usr/share/kernel/*/kernel.release \
+				| cut -d/ -f5)
+		if [ "$label" = "xen-" ]; then
+			label=xen-$lst
+		fi
+
+		echo "LABEL $label" >> $conf.new
+		if [ "$label" = "$default" ]; then
+			echo "  MENU DEFAULT" >> $conf.new
+		fi
+		echo "  MENU LABEL Xen + Linux $tag" >> $conf.new
+		echo "  COM32 mboot.c32" >> $conf.new
+		echo "  APPEND xen.gz $xen_opts --- $(basename $kernel) root=$root modules=${modules}${TYPE:+,$TYPE} $default_kernel_opts --- $initramfs" >> $conf.new
+		echo "" >> $conf.new
+		lst=$(($lst + 1))
+	done
+fi
+
+for kernel in $(find /boot -name "vmlinuz*" -type f); do
+	case $kernel in
+	*vmlinuz) tag=vanilla;;
+	*vmlinuz-*)  tag=$(basename $kernel | cut -b9-);;
+	*) continue;;
+	esac
+	everbose "Found kernel: $kernel"
+	label=$(grep -w -l $tag /usr/share/kernel/*/kernel.release | cut -d/ -f5)
+	if [ -z "$label" ]; then
+		if [ "$tag" = vanilla ]; then
+			label="vanilla"
+		else
+			label=$lst
+		fi
+	fi
+	echo "LABEL $label" >> $conf.new
+	if [ "$label" = "$default" ]; then
+		echo "  MENU DEFAULT" >> $conf.new
+	fi
+	echo "  MENU LABEL Linux $tag" >> $conf.new
+	echo "  LINUX $(basename $kernel)" >> $conf.new
+	if [ -f "/boot/initramfs-$tag" ]; then
+		everbose "Found initramfs: /boot/initramfs-$tag"
+		echo "  INITRD initramfs-$tag" >> $conf.new
+	fi
+	echo "  APPEND root=$root modules=${modules}${TYPE:+,$TYPE} $default_kernel_opts" >> $conf.new
+	echo "" >> $conf.new
+	lst=$(($lst + 1))
+done
+
+if [ -n "$password" ]; then
+	echo "NOESCAPE 1" >> $conf.new
+	echo "MENU MASTER PASSWD $password" >> $conf.new
+	echo "" >> $conf.new
+	chmod o-r $conf.new
+fi
+
+everbose "$lst entries found."
+
+for entry in /etc/update-extlinux.d/*; do
+	[ -f "$entry" ] && { cat $entry; echo ""; } >> $conf.new
+done
+
+echo "MENU SEPARATOR" >> $conf.new
+echo "" >> $conf.new
+
+if [ -f "/boot/hdt.c32" ]; then
+	everbose "Found Hardware Detection Tool: /boot/hdt.c32"
+	echo "LABEL hdt" >> $conf.new
+	echo "  MENU LABEL Hardware info" >> $conf.new
+	if [ -n "$password" ]; then
+		echo "  MENU PASSWD" >> $conf.new
+	fi
+	echo "  COM32 hdt.c32" >> $conf.new
+	if [ -f "/boot/memtest" ]; then
+		everbose "Found memtest86+: /boot/memtest"
+		echo "  APPEND memtest=memtest" >> $conf.new
+	fi
+	echo "" >> $conf.new
+elif [ -f "/boot/memtest" ]; then
+	everbose "Found memtest86+: /boot/memtest"
+	echo "LABEL memtest" >> $conf.new
+	echo "  MENU LABEL Memtest86+" >> $conf.new
+        echo "  KERNEL memtest" >> $conf.new
+	echo "" >> $conf.new
+fi
+
+for i in reboot poweroff; do
+	[ -f "/boot/$i.c32" ] || continue
+	everbose "Found $i"
+	# make first char capital
+	cap=$( echo $i | awk '{sub(".", substr(toupper($0),1,1), $0); print}' )
+	echo "LABEL $i" >> $conf.new
+	echo "  MENU LABEL $cap" >> $conf.new
+        echo "  COM32 $i.c32" >> $conf.new
+	echo "" >> $conf.new
+done
+
+if cmp -s $conf.new $conf; then
+	everbose "Configuration unchanged."
+	rm $conf.new
+fi
+
+if [ "$overwrite" != "1" ]; then
+	exit 0
+elif [ -f "$conf.new" ]; then
+	# keep a backup just in case
+	if [ -f "$conf" ]; then
+		mv $conf $conf.old
+	fi
+
+	mv $conf.new $conf
+fi
+
+everbose "Installing libutil.c32 libcom32.c32 mboot.c32 menu.c32 vesamenu.c32 to /boot."
+cp /usr/share/syslinux/libutil.c32 \
+	/usr/share/syslinux/libcom32.c32 \
+	/usr/share/syslinux/mboot.c32 \
+	/usr/share/syslinux/menu.c32 \
+	/usr/share/syslinux/vesamenu.c32 \
+	/boot
+
+case "$(stat -f -c '%T' /boot)" in
+ext*) extlinux --update /boot || [ -n "$warn_only" ];;
+esac
+

system/syslinux/update-extlinux.conf

+# configuration for extlinux config builder
+
+# overwrite
+# Overwrite current /boot/extlinux.conf. If this is not '1' we will only
+# write to /boot/extlinux.conf.new
+overwrite=1
+
+# vesa_menu
+# use fancy vesa menu (vesamenu.c32) menus, won't work with serial
+vesa_menu=1
+
+# default_kernel_opts
+# default kernel options
+default_kernel_opts=ro
+
+# modules
+# modules which should be loaded before pivot_root
+modules=
+#sd-mod,usb-storage,ext3
+
+# root
+# root device - if not specified, will be guessed using
+# blkid -o export /dev/root
+root=
+
+# verbose
+# if set to non-zero, update-extlinux will be a lot more verbose.
+verbose=0
+
+# hidden
+# if set to non-zero, the boot menu will be hidden by default.
+hidden=0
+
+# timeout
+# number of seconds to wait before booting default
+timeout=5
+
+# default
+# default kernel to boot
+default=vanilla
+
+# serial_port
+# serial port number - if not specified, serial console will be disabled
+serial_port=
+
+# serial_baud
+# the baudrate for the serial port. Will use 115200 if unset
+serial_baud=115200
+
+# xen_opts
+# options to hand to xen hypervisor, useful ones are:
+#    dom0_mem=256M (give domain-0 environment 256M ram)
+xen_opts=dom0_mem=256M
+
+# if you copy /usr/share/syslinux/reboot.c32 to /boot/, a menu entry
+# will be auto-generated for it
+
+# if you copy hdt.c32, libgpl.c32, and libmenu.c32 from /usr/share/syslinux/
+# to /boot/, a menu entry will be auto-generated for HDT
+
+# if you download and install /boot/memtest, then if HDT is present it
+# will use it, else a separate menu entry will be auto-generated for
+# memtest
+
+# optional password
+# you can generate a SHA512 password using: mkpasswd
+#
+# if you assign a password, you should make this file world-unreadable
+#
+# if a password is assigned, the menu entries can't be edited at boot
+# time, and HDT if present is password-protected
+#
+# you can also include "MENU PASSWD" in any custom entries you have in
+# /etc/update-extlinux.d/
+password=''