binutil external binary functions

1 files changed, 122 insertions, 0 deletions

diff --git a/helper/binutil.inc b/helper/binutil.inc
new file mode 100644
index 00000000..b97ab0f8
--- /dev/null
+++ b/helper/binutil.inc
@@ -0,0 +1,122 @@
+#!/bin/bash
+# 
+# Common functions to copy binaries and their dependancies.
+#
+############################################################
+#
+# Usage: get_dynamic_dependencies <binary_list>
+# 	 (the list must be seperated by spaces)
+#
+# Ouput: 
+#	 Will simply echo list of required libraries
+
+# List of libraries to exclude from
+BLACKLIST="ld-linux linux-gate linux-vdso libc.so"
+LOCALSEARCH=0
+LOCALSEARCHDIR=""
+
+get_dynamic_dependencies() {
+	
+	if [ "x$1" == "x-l" ]; then
+		LOCALSEARCH=1
+		pdebug "Local search activated."
+		shift
+		[ ! -d $1 ] && perror "Directory given does not exist, exiting."
+		LOCALSEARCHDIR=$1
+		shift
+		pdebug "Looking in: $LOCALSEARCHDIR"
+	fi	
+
+	while [ $# != 0 ]; do
+		local BINARY=$1
+		shift
+
+		pdebug "Processing ${BINARY} ..."
+		
+		local LDD_OUT="ldd_output"
+		if ldd $BINARY > $LDD_OUT; then
+			# Case 1: dynamic
+			for LIB in $(cat $LDD_OUT | grep -v $(echo $BLACKLIST|sed 's/ /\\|/g') | awk '{print $1 $2 $3}'); do
+				# split the entry into an array, ex:
+				# libm.so.6 => /lib/libm.so.6 would be split into:
+				# liblink[0]   liblink[1]
+				local liblink=(${LIB//=>/ })
+				pdebug "      Searching for ${liblink[0]}..."
+				lib_search
+			done
+		else
+			# Case 2: not a dynamic
+			pdebug "$BINARY not a dynamic, skipping."
+			continue
+		fi	
+		rm $LDD_OUT
+	done
+}
+
+lib_search(){
+
+	# if activated, start by searching the lib locally
+	if [ "x$LOCALSEARCH" == "x1" ]; then
+		cd $LOCALSEARCHDIR
+        	local LOCAL_MATCHES=$(find . -name "${liblink[0]}") # | awk -F '.' '{print $1}')".so\*)
+		cd - &>/dev/null
+	        if [ "x${LOCAL_MATCHES}" != "x" ]; then
+        		for llib in ${LOCAL_MATCHES}; do
+	        	        pdebug "\tFound locally, copying ${LOCALSEARCHDIR}/${llib}"
+				get_link_chain "${LOCALSEARCHDIR}"/"${llib}"
+				
+	                done
+			# found the libs, we are done
+			return
+	        fi
+		# mark local search as done
+		LOCALSEARCH=0		
+	fi
+
+	# search the lib on the system since it was not found earlier
+	if [ ! -z ${liblink[1]} ] && [ "x${liblink[1]}" != "xnot" ]; then
+		pdebug "\tNot found locally but in system, copying ${liblink[1]}"
+		# get chain of symlink for that lib
+                get_link_chain ${liblink[1]}
+        else
+                pwarning "Lib '${liblink[0]}' from required dir '$ENTRY' neither found in build directory nor on this system."
+                pwarning "If this lib is not supplied by another module, this module will probably fail in your final system"
+        fi
+}
+############################################################
+#
+# Usage: get_link_chain <link> 
+#
+#	 <link> must be in absolute form
+#
+# Output:
+#	 Lists the symlink chain until a hardlink is found.
+get_link_chain() {
+
+	# the first parameter must be absolute
+	[[ "$1" == /* ]] || perror "get_link_chain() requires absolute paths."
+
+	# canonalize
+	local LINK=$(canonicalize $1)
+
+	# write the first link in the chain
+	# we strip the LOCALSEARCHDIR if it was found locally
+	[ "x$LOCALSEARCH" == "x1" ] && echo "./${LINK#$LOCALSEARCHDIR}" || echo ${LINK}
+
+	# now we check for symlinks
+	local TRY=0
+	while [ -L $LINK ] && [ $TRY -lt 10 ]; do
+		let TRY=TRY+1
+
+		# save the directory prefix
+		CURRENTDIR=$(dirname ${LINK})
+		# first follow the link
+		LINK=$(readlink $LINK)
+
+		pdebug "Processing $LINK"
+		# $LINK can be absolute or relative, check cases
+		[[ "$LINK" == /* ]] || LINK=$(canonicalize "$CURRENTDIR"/"${LINK}")
+		[ "x$LOCALSEARCH" == "x1" ] && echo "./${LINK#$LOCALSEARCHDIR}" || echo ${LINK}
+	done
+
+}