target: added squashfs output support

Note:

Actually this implementation is only a slightly changed version of
the initramfs output support.

target/share/squashfs.in

@@ -0,0 +1,48 @@
+# --- SDE-COPYRIGHT-NOTE-BEGIN ---
+# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
+#
+# Filename: target/share/squashfs.in
+# Copyright (C) 2011 The OpenSDE Project
+#
+# More information can be found in the files COPYING and README.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License. A copy of the
+# GNU General Public License can be found in the file COPYING.
+# --- SDE-COPYRIGHT-NOTE-END ---
+
+# source overlay functions, to wrap overlay_apply behind squashfs_install_overlay
+#
+. "$base/lib/overlay/overlay-functions.in"
+
+# functions
+#
+
+# list the packages active for stage 1
+squashfs_list_packages() {
+	grep '^X' $base/config/$config/packages | cut -d' ' -f5
+}
+
+# install a package based on the flist and a given filter
+squashfs_install_flist() {
+	local pkg_name="$1" sandbox="$2" rootfs="$3"
+	local flist="$sandbox/var/adm/flists/$pkg_name"
+	shift 3
+
+	sed "$@" "$flist" | cut -f2- -d' ' |
+		tar -C "$sandbox/" -cf- --no-recursion --files-from=- |
+		tar -C "$rootfs" -xf-
+}
+
+# weak functions
+#
+squashfs_install_overlay() { overlay_apply "$@"; }
+
+# should this package be extracted by flist or not?
+# squashfs_install <pkg_name> <sandbox> <rootfs>
+squashfs_install() { true; }
+
+# what arguments should it pass to sed to filter the flist?
+# squashfs_install_pattern <pkg_name> <default_patterns>
+squashfs_install_pattern() { shift; echo "$@"; }

target/share/squashfs/build.sh

@@ -0,0 +1,142 @@
+# --- SDE-COPYRIGHT-NOTE-BEGIN ---
+# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
+#
+# Filename: target/share/squashfs/build.sh
+# Copyright (C) 2011 The OpenSDE Project
+#
+# More information can be found in the files COPYING and README.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License. A copy of the
+# GNU General Public License can be found in the file COPYING.
+# --- SDE-COPYRIGHT-NOTE-END ---
+
+#Description: SquashFS rootfs
+
+rootfs="$build_toolchain/squashfs"
+
+rm -rf "$rootfs"
+mkdir -p "$rootfs"
+
+# Hooks
+#
+SQUASHFS_POSTINSTALL_HOOK=
+SQUASHFS_POSTOVERLAY_HOOK=
+
+# Lists
+#
+SQUASHFS_INSTALL_PACKAGES=
+SQUASHFS_INSTALL_PATTERN="-e '/ var\/adm/ d;' \
+	-e '/\.\(h\|o\|a\|a\..*\|la\|pc\)$/d;' -e '/\/aclocal\//d;' \
+	-e '/ usr\/share\/\(doc\|info\|man\)\//d;' -e'/ opt\/[^\/]*\/\(doc\|info\|man\)\//d;' -e '/\/gtk-doc\//d;'"
+
+SQUASHFS_EMPTY_PATTERN="-e '/\.\/lib\/udev\/devices\//d;'"
+
+# source library, and the target specific overlay
+#
+. "target/share/squashfs.in"
+if [ -f target/$target/build-squashfs.in ]; then
+	. target/$target/build-squashfs.in
+fi
+
+# install what was flisted for stage 1 packages, use $SQUASHFS_INSTALL_PATTERN to skip files
+#
+[ -n "$SQUASHFS_INSTALL_PACKAGES" ] || SQUASHFS_INSTALL_PACKAGES=$( squashfs_list_packages )
+
+echo_status "Populating ${rootfs#$base/} ..."
+for pkg_name in $SQUASHFS_INSTALL_PACKAGES; do
+	if squashfs_install "$pkg_name" "build/$SDECFG_ID" "$rootfs"; then
+		echo_status "- $pkg_name"
+
+		eval "squashfs_install_flist '$pkg_name' 'build/$SDECFG_ID' '$rootfs' $( squashfs_install_pattern "$pkg_name" "$SQUASHFS_INSTALL_PATTERN" )"
+	fi
+done
+
+# hook $SQUASHFS_POSTINSTALL_HOOK
+#
+[ -z "$SQUASHFS_POSTINSTALL_HOOK" ] || eval "$SQUASHFS_POSTINSTALL_HOOK"
+
+# Apply overlay
+[ ! -d "target/$target/squashfs" ] || squashfs_install_overlay "target/$target/squashfs" "$rootfs"
+
+# hook $SQUASHFS_POSTOVERLAY_HOOK
+#
+[ -z "$SQUASHFS_POSTOVERLAY_HOOK" ] || eval "$SQUASHFS_POSTOVERLAY_HOOK"
+
+# remove empty directories, use $SQUASHFS_EMPTY_PATTERN to skip directories
+#
+echo_status "Removing empty directories ..."
+( cd "$rootfs"; find . -type d ) | tac | eval "sed -e '/\.\/\(dev\|sys\|proc\|mnt\|srv\|tmp\|root\|var\)\(\|\/.*\)$/d;' $SQUASHFS_EMPTY_PATTERN" | while read folder; do
+	count=$( find "$rootfs/$folder" | wc -l )
+
+	if [ $count -eq 1 ]; then
+		rm -r "$rootfs/$folder"
+		# echo_status "- ${folder} deleted."
+	fi
+done
+
+echo_status "Checking for broken symlinks ..."
+( cd "$rootfs"; find . -type l | cut -c2- ) | while read link; do
+	x="$link"
+	case "$link" in
+		/dev/*) continue ;;
+	esac
+	while true; do
+		target=$( readlink "$rootfs$x" )
+		case "$target" in
+			/proc/*)
+				continue 2
+				;;
+			/*)
+				;;
+			*)
+				# relatives turned into absolute
+				target="${x%/*}/${target}"
+		esac
+
+		[ -L "$rootfs$target" ] || break 1
+
+		x="$target"
+	done
+
+	if [ ! -e "$rootfs$target" ]; then
+		echo_warning "- $link is broken ($target), deleting."
+		rm -f "$rootfs$link"
+	fi
+done
+
+# ldconfig
+#
+if [ -s "$rootfs/etc/ld.so.conf" ]; then
+	echo_status "Running ldconfig ..."
+	ldconfig -r "$rootfs"
+fi
+
+# sanity checks
+#
+[ -x "$rootfs/init" ] || echo_warning "This image is missing an /init file, it wont run."
+for x in $rootfs/{,usr/}{sbin,bin}/* $rootfs/init $rootfs/lib/udev/*; do
+	[ -e "$x" ] || continue
+
+	signature="$( file "$x" 2> /dev/null | cut -d' ' -f2- )"
+
+	case "$signature" in
+		directory)	continue ;;
+		ASCII\ English\ text)
+				continue ;;
+		*symbolic*|*statically*|*shell*)
+				continue ;;
+		*dynamically\ linked*)
+				[ "$SDECFG_STATIC" == 1 ] || continue ;;
+	esac
+
+	echo_warning "evil signature ($signature) on '${x#$rootfs}'."
+done
+
+echo_status "Expanded size: $( du -sh "$rootfs" | cut -f1)."
+
+echo_status "Creating ${rootfs#$base/}.sqx ..."
+( mksquashfs $rootfs $build_toolchain/squashfs.sqx -comp gzip )
+
+echo_status "Image size: $( du -sh "$rootfs.sqx" | cut -f1)."