diff options
Diffstat (limited to 'helper')
| -rw-r--r-- | helper/binutil.inc | 80 |
1 files changed, 63 insertions, 17 deletions
diff --git a/helper/binutil.inc b/helper/binutil.inc index 261ccf16..72a43ad2 100644 --- a/helper/binutil.inc +++ b/helper/binutil.inc @@ -3,24 +3,45 @@ # Common functions to copy binaries and their dependancies. # ############################################################ +# This will parse the output of ldd on given binaries +# and echo the location of these libs to STDOUT +# The output of this function has to be used in some +# way, it only echos! # -# Usage: get_dynamic_dependencies [-l <searchdir>] <binary_list> -# * the list must be seperated by spaces -# * the search for lib needed by a binary can be done locally, -# using the -l <searchdir> option +# About local search: +# It is required that we can search for the dynamic +# libraries in a specific directory, namely the one +# where we (potentially) built the binary. If a +# corresponding library is found, it should take +# precedence over ones found on the system. +# This can be done by using the '-l' switch, see below. # -# Ouput: -# Will simply echo list of required libraries - -# List of libraries to exclude from +############################################################ +# We use a blacklist mechanism to exclude common libraries. +# This improve runtime quite a bit... BLACKLIST="ld-linux linux-gate linux-vdso libc.so" + +# Initialise flag and path for local search LOCALSEARCH=0 LOCALSEARCHDIR="" +# replace ' ' by '|' in the blacklist, so grep can use it directly. CURRENT_BLACKLIST=$(echo ${BLACKLIST} | sed 's/ /\\|/g') +############################################################ +# +# Usage: +# get_dynamic_dependencies [-l <searchdir>] <binary_list> +# * the list must be seperated by spaces +# * the search for lib needed by a binary can be done locally, +# using the -l <searchdir> option +# +# Ouput: +# Will simply echo list of required libraries + get_dynamic_dependencies() { - + # check if local search is activated by the '-l' switch + # if so the following argument is the path. if [ "x$1" == "x-l" ]; then LOCALSEARCH=1 shift @@ -29,22 +50,25 @@ get_dynamic_dependencies() { shift fi + # main loop over the list of binaries while [ $# != 0 ]; do local BINARY=$1 shift + # now run ldd on it and save the output in $LDD_OUT local LDD_OUT="ldd_output" if ldd $BINARY > $LDD_OUT; then - # Case 1: dynamic + # Case 1: file is a dynamic executable for LIB in $(cat $LDD_OUT | grep -v "${CURRENT_BLACKLIST}" | 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//=>/ }) + # call helper function to find the correct lib lib_search done else - # Case 2: not a dynamic + # Case 2: not a dynamic, do nothing pdebug "\t\t\t(Not a dynamic.)" rm -f $LDD_OUT continue @@ -54,6 +78,20 @@ get_dynamic_dependencies() { } +############################################################ +# +# Usage: +# lib_search +# +# Output: +# List of the path including any possible symbolic links +# of the found libraries. +# +# Note: This function takes no argument. It takes the library +# to look for from the local array LIBLINK. +# If the local was activated in get_dynamic_dependencies +# this will search for the library in LOCALSEARCHDIR first. +# If its not found, then it will look system-wide. lib_search(){ # if activated, start by searching the lib locally @@ -85,13 +123,14 @@ lib_search(){ } ############################################################ # -# Usage: get_link_chain <link> [prefix] -# -# <link> must be in absolute form- -# [prefix] is the prefix to strip from the ouput. +# Usage: +# get_link_chain <link> [prefix] +# * <link> must be in absolute form- +# * [prefix] is the prefix to strip from the ouput. # # Output: # Lists the symlink chain until a hardlink is found. +# get_link_chain() { # sanity checks @@ -156,8 +195,15 @@ get_link_chain() { done pdebug "\t\t$CHAIN" } - -# Function to get libc and ld-linux +############################################################ +# +# Usage: +# list_basic_libs +# +# Output: +# list the path of following basic system libraries: +# - libc.so, ld-linux.so +# list_basic_libs() { for i in $(ldd ${SHELL}) do |