From 21366c854a411880fe83b68aceaf20596d2b374e Mon Sep 17 00:00:00 2001
From: Natanael Copa <ncopa@alpinelinux.org>
Date: Fri, 3 Jun 2011 09:02:38 +0000
Subject: mkinitfs-rundep: new tool for tracing runtime deps

---
 Makefile           |  2 +-
 mkinitfs-rundep.in | 36 ++++++++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100755 mkinitfs-rundep.in

diff --git a/Makefile b/Makefile
index c5b84e0..2552e65 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,7 @@ sysconfdir	?= /etc/mkinitfs
 datarootdir	?= /usr/share
 datadir		?= $(datarootdir)/mkinitfs
 
-SBIN_FILES	:= mkinitfs bootchartd
+SBIN_FILES	:= mkinitfs bootchartd mkinitfs-rundep
 SHARE_FILES	:= initramfs-init fstab passwd group
 CONF_FILES	:= mkinitfs.conf \
 		modules.d/ata \
diff --git a/mkinitfs-rundep.in b/mkinitfs-rundep.in
new file mode 100755
index 0000000..ee9bcdb
--- /dev/null
+++ b/mkinitfs-rundep.in
@@ -0,0 +1,36 @@
+#!/bin/sh
+
+# resolve .so dependencies using ldd
+
+find_path() {
+	for i in /lib /usr/lib; do
+		[ -e "$i/$1" ] && echo "$i/$1" && return 0
+	done
+	return 1
+}
+
+resolve_links() {
+	local f
+	while [ $# -gt 0 ]; do
+		if [ -L "$1" ]; then
+			local f=$(readlink $1)
+			local p="$(find_path $f)"
+#			echo "following $p"
+			resolve_links $p
+		fi
+		echo "$1"
+		shift
+	done
+}
+
+find_deps() {
+	bin=$1
+	resolve_links $(ldd $bin 2>/dev/null | awk -F'=>' '{print $2}' | sed 's/(.*//')
+}
+
+while [ $# -gt 0 ]; do
+	find_deps $1 || exit 1
+	shift
+done
+
+
-- 
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