main/alpine-conf: add support for read-only lbu media

ref #477

main/alpine-conf/0001-lbu-remount-LBU_MEDIA-as-read-write-if-it-was-read-o.patch

+From 4e7ab7455206ec157a72d07c40c07f1a299529f1 Mon Sep 17 00:00:00 2001
+From: Natanael Copa <ncopa@alpinelinux.org>
+Date: Fri, 3 Dec 2010 08:49:43 +0000
+Subject: [PATCH] lbu: remount LBU_MEDIA as read-write if it was read-only
+
+ref #477
+---
+ lbu.in |   34 +++++++++++++++++++++++++++++-----
+ 1 files changed, 29 insertions(+), 5 deletions(-)
+
+diff --git a/lbu.in b/lbu.in
+index dfd7e3c..a0dfe16 100644
+--- a/lbu.in
++++ b/lbu.in
+@@ -1,7 +1,7 @@
+ #!/bin/sh
+ 
+ # lbu - utility to create local backups.
+-# Copyright (c) 2006 Natanael Copa
++# Copyright (c) 2006-2010 Natanael Copa <ncopa@alpinelinux.org>
+ # May be distributed under GPL2
+ 
+ VERSION=@VERSION@
+@@ -54,6 +54,9 @@ Common options:
+ 
+ cleanup() {
+ 	local i
++	for i in $REMOUNT_RO_LIST; do
++		mount -o remount,ro $i
++	done
+ 	for i in $UMOUNT_LIST; do
+ 		umount $i
+ 	done
+@@ -64,9 +67,30 @@ exit_clean() {
+ 	exit 1
+ }
+ 
++# check if given dir is not a mounted mountpoint
++is_unmounted() {
++	awk "\$2 == \"$1\" {exit 1}" /proc/mounts
++}
++
+ mount_once() {
+-	if awk "\$2 == \"$1\" {exit 1}" /proc/mounts; then
+-		mount $1 && UMOUNT_LIST="$1 $UMOUNT_LIST"
++	if is_unmounted "$1"; then
++		mount $1 && UMOUNT_LIST="$1 $UMOUNT_LIST" || return 1
++	fi
++}
++
++# check if given dir is read-only
++is_ro() {
++	local tmpfile=$(mktemp -p "$1")
++	[ -z "$tmpfile" ] && return 0
++	rm -f "$tmpfile"
++	return 1
++}
++
++mount_once_rw() {
++	mount_once "$1" || return 1
++	if is_ro "$1"; then
++		REMOUNT_RO_LIST="$1 $REMOUNT_RO_LIST"
++		mount -o remount,rw "$1"
+ 	fi
+ }
+ 
+@@ -385,7 +409,7 @@ cmd_commit() {
+ 	# mount media unles its already mounted
+ 	mnt=/media/$media
+ 	[ -d "$mnt" ] || usage
+-	mount_once "$mnt" || die "failed to mount $mnt"
++	mount_once_rw "$mnt" || die "failed to mount $mnt"
+ 
+ 	# find the outfile
+ 	outfile="$mnt/$(hostname).apkovl.tar.gz"
+@@ -538,7 +562,7 @@ cmd_revert() {
+ 	if [ -n "$ENCRYPTION" ]; then
+ 		current="$current.$ENCRYPTION"
+ 	fi
+-	mount_once "$mnt" || die "failed to mount $mnt"
++	mount_once_rw "$mnt" || die "failed to mount $mnt"
+ 	[ -f "$revertto" ] || die "file not found: $revertto"
+ 	backup_apkovl "$current"
+ 	vecho "Reverting to $1"
+-- 
+1.7.3.2
+

main/alpine-conf/APKBUILD

 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=alpine-conf
 pkgver=2.5.4
-pkgrel=0
+pkgrel=1
 pkgdesc="Alpine configuration management scripts"
 url=http://git.alpinelinux.org/cgit/$pkgname
 depends="openrc"
-source="http://git.alpinelinux.org/cgit/$pkgname/snapshot/$pkgname-$pkgver.tar.bz2"
+source="http://git.alpinelinux.org/cgit/$pkgname/snapshot/$pkgname-$pkgver.tar.bz2
+	0001-lbu-remount-LBU_MEDIA-as-read-write-if-it-was-read-o.patch
+	"
 license="GPL-2"
 
 _builddir="$srcdir"/$pkgname-$pkgver
@@ -33,4 +35,5 @@ package() {
 		ln -s lbu "$pkgdir"/sbin/lbu_$i
 	done
 }
-md5sums="91a2b8a150917cc06f6c9ec839b70bb0  alpine-conf-2.5.4.tar.bz2"
+md5sums="91a2b8a150917cc06f6c9ec839b70bb0  alpine-conf-2.5.4.tar.bz2
+9245a4bc53b24584d43b3a3f1556c500  0001-lbu-remount-LBU_MEDIA-as-read-write-if-it-was-read-o.patch"