[scripts] add a helper script to bundle required libraries for host utilities

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33195 3c298f89-4303-0410-b956-a3cf2f4a3e73

scripts/bundle-libraries.sh

@@ -0,0 +1,114 @@
+#!/usr/bin/env bash
+#
+#   Script to install host system binaries along with required libraries.
+#   Refer to the --help output for more information.
+#
+#   Copyright (C) 2012 Jo-Philipp Wich <jow@openwrt.org>
+#
+#   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; either version 2 of the License, or
+#   (at your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program; if not, write to the Free Software
+#   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+DIR="$1"; shift
+
+_cp() {
+	cp ${VERBOSE:+-v} -L "$1" "$2" || {
+		echo "cp($1 $2) failed" >&2
+		exit 1
+	}
+}
+
+_md() {
+	mkdir ${VERBOSE:+-v} -p "$1" || {
+		echo "mkdir($1) failed" >&2
+		exit 2
+	}
+}
+
+_ln() {
+	ln ${VERBOSE:+-v} -sf "$1" "$2" || {
+		echo "ln($1 $2) failed" >&2
+		exit 3
+	}
+}
+
+for LDD in ${PATH//://ldd }/ldd; do
+	"$LDD" --version >/dev/null 2>/dev/null && break
+	LDD=""
+done
+
+[ -n "$LDD" -a -x "$LDD" ] || {
+	echo "Unable to find working ldd" >&2
+	exit 4
+}
+
+for BIN in "$@"; do
+	[ -n "$BIN" -a -x "$BIN" -a -n "$DIR" ] || {
+		echo "Usage: $0 <destdir> <executable> ..." >&2
+		exit 1
+	}
+
+	[ ! -d "$DIR/bundled/lib" ] && {
+		_md "$DIR/bundled/lib"
+		_md "$DIR/bundled/usr"
+		_ln "../lib" "$DIR/bundled/usr/lib"
+	}
+
+	LDSO=""
+
+	echo "Bundling ${BIN##*/}"
+	for token in $("$LDD" "$BIN" 2>/dev/null); do
+		case "$token" in */*.so*)
+			case "$token" in
+				*ld-*.so*) LDSO="${token##*/}" ;;
+				*) echo " * lib: ${token##*/}" ;;
+			esac
+
+			dest="$DIR/bundled/lib/${token#*/lib*/}"
+			ddir="${dest%/*}"
+
+			[ -f "$token" -a ! -f "$dest" ] && {
+				_md "$ddir"
+				_cp "$token" "$dest"
+
+				case "$token" in */tls/*.so*)
+					_cp "${token%/tls/*}/${token##*/}" "$DIR/bundled/lib/${token##*/}"
+				;; esac
+			}
+		;; esac
+	done
+
+	_md "$DIR"
+
+	# is a dynamically linked executable
+	if [ -n "$LDSO" ]; then
+		_cp "$BIN" "$DIR/bundled/${BIN##*/}"
+
+		[ -x "$DIR/bundled/run.sh" ] || {
+			cat <<-EOF > "$DIR/bundled/run.sh"
+				#!/usr/bin/env bash
+				dir="\$(dirname "\$0")"
+				bin="\$(basename "\$0")"
+				exec -a "\$0" "\$dir/bundled/lib/$LDSO" --library-path "\$dir/bundled/lib" "\$dir/bundled/\$bin" "\$@"
+			EOF
+			chmod ${VERBOSE:+-v} 0755 "$DIR/bundled/run.sh"
+		}
+
+		_ln "./bundled/run.sh" "$DIR/${BIN##*/}"
+
+	# is a static executable or non-elf binary
+	else
+		echo " * not dynamically linked"
+		_cp "$BIN" "$DIR/${BIN##*/}"
+	fi
+done