File indexing completed on 2024-10-06 08:10:26

 #!/bin/bash
 
 # Copyright 2013 Dominik Seichter <domseichter@googlemail.com>
 # 
 # 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, see <http://www.gnu.org/licenses/>.
  
 # This is the maximum depth to which dependencies are resolved
 MAXDEPTH=14
 
 TMPFILE=
 READELFTMPFILE=
 LDDTMPFILE=
 
 cleanup() {
         for _v in TMPFILE READELFTMPFILE LDDTMPFILE; do
                 [ -n "${!_v}" ] && rm -f -- "${!_v}"
         done
 }
 
 trap cleanup EXIT
  
 # analyze a given file on its
 # dependecies using ldd and write
 # the results to a given temporary file
 #
 # Usage: analyze [OUTPUTFILE] [INPUTFILE]
 analyze()
 {
     local OUT="$1"
     local IN="$2"
     local NAME=$(basename "$IN")
  
     for i in $LIST
     do
         if [ X"$i" == X"$NAME" ];
         then
             # This file was already parsed
             return
         fi
     done
     # Put the file in the list of all files
     LIST="$LIST $NAME"
  
     DEPTH=$(($DEPTH + 1))
     if [ $DEPTH -ge $MAXDEPTH ];
         then
         echo "MAXDEPTH of $MAXDEPTH reached at file $IN."
         echo "Continuing with next file..."
         DEPTH=$(($DEPTH - 1))
         return
     fi
  
     echo "Parsing file:              $IN"
  
     $READELF "$IN" > "$READELFTMPFILE" 2>&1
     ELFRET=$?
  
     if [ $ELFRET != 0 ];
         then
         echo "ERROR: ELF reader returned error code $RET"
         echo "ERROR:"
         cat -v -- "$TMPFILE"
         echo "Aborting..."
         exit 1
     fi
  
     DEPENDENCIES=$(cat "$READELFTMPFILE" | grep NEEDED | awk '{if (substr($NF,1,1) == "[") print substr($NF, 2, length($NF) - 2); else print $NF}')
  
     for DEP in $DEPENDENCIES;
     do
         if [ -n "$DEP" ];
         then
  
             # XXX Change ldd to something more secure?
             ldd "$IN" > "$LDDTMPFILE" 2>&1
             LDDRET=$?
  
             if [ $LDDRET != 0 ];
                 then
                 echo "ERROR: ldd returned error code $RET"
                 echo "ERROR:"
                 cat -v -- "$TMPFILE"
                 echo "Aborting..."
                 exit 1
             fi
  
             DEPPATH=$(grep -- "$DEP" "$LDDTMPFILE" | awk '{print $3}')
             if [ -n "$DEPPATH" ];
             then
                 echo "  \"$NAME\" -> \"$DEP\";" >> $OUT
                 analyze "$OUT" "$DEPPATH"
             fi
         fi
     done
  
     DEPTH=$(($DEPTH - 1))
 }
  
 ########################################
 # main                                 #
 ########################################
  
 if [ $# != 2 ];
     then
     echo "Usage:"
     echo "  $0 [filename] [outputimage]"
     echo ""
     echo "This tools analyses a shared library or an executable"
     echo "and generates a dependency graph as an image."
     echo ""
     echo "GraphViz must be installed for this tool to work."
     echo ""
     exit 1
 fi
  
 DEPTH=0
 INPUT="$1"
 OUTPUT="$2"
 TMPFILE="$(mktemp -t)"
 LDDTMPFILE="$(mktemp -t)"
 READELFTMPFILE="$(mktemp -t)"
 LIST=""
  
 if [ ! -e "$INPUT" ];
     then
     echo "ERROR: File not found: $INPUT"
     echo "Aborting..."
     exit 2
 fi
  
 # Use either readelf or dump
 # Linux has readelf, Solaris has dump
 READELF=$(type readelf 2> /dev/null)
 if [ $? != 0 ]; then
   READELF=$(type dump 2> /dev/null)
   if [ $? != 0 ]; then
     echo Unable to find ELF reader
     exit 1
   fi
   READELF="dump -Lv"
 else
   READELF="readelf -d"
 fi
  
  
  
 echo "Analyzing dependencies of: $INPUT"
 echo "Creating output as:        $OUTPUT"
 echo ""
  
 echo "digraph DependencyTree {" > "$TMPFILE"
 echo "  \"$(basename $INPUT)\" [shape=box];" >> "$TMPFILE"
 analyze "$TMPFILE" "$INPUT"
 echo "}" >> "$TMPFILE"
  
 #cat $TMPFILE # output generated dotfile for debugging purposses
 dot -Tpng "$TMPFILE" "-o$OUTPUT"
  
 exit 0