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How to delete '$'n' characters appended to ldd list – Debian

I am trying to copy binary dependencies to other folder, so I use ldd to see what should be copied.

However the script fails when copying. It "appears" '$'n' characters when binary dependencies are copied.

Something is wrong, but I dont know what. Tried running command per command and cant see the fault.

What is the trouble here ?

Thanks

Script code

#!/usr/bin/env bash

set -e

chr=/home/myjail
cmds=( bash echo ls rm )

mkdir -p "$chr"/{bin,lib,lib64}

# copy commands
for app in "${cmds[@]}"; do
        echo 'Added command:'"$app"
        cp -v /bin/"$app" "$chr/bin"
done

# copy deps    
for app in "${cmds[@]}";do

        echo 'deps for:'"$app"
        deps="$(ldd /bin/"$app" | egrep -o '/lib.*.[0-9]')"

        for curdep in "${deps[@]}";do
                echo "$curdep"
                cp -v --parents "$curdep" "$chr"
        done
done

Script output

furby@debian-haptic20:~# ./depcopy.sh
Added command:bash
'/bin/bash' -> '/var/lib/haproxy/bin/bash'
Added command:echo
'/bin/echo' -> '/var/lib/haproxy/bin/echo'
Added command:ls
'/bin/ls' -> '/var/lib/haproxy/bin/ls'
Added command:mysql
'/bin/mysql' -> '/var/lib/haproxy/bin/mysql'
deps for:bash
/lib/x86_64-linux-gnu/libtinfo.so.6
/lib/x86_64-linux-gnu/libdl.so.2
/lib/x86_64-linux-gnu/libc.so.6
/lib64/ld-linux-x86-64.so.2
cp: failed to get attributes of '/lib/x86_64-linux-gnu/libtinfo.so.6'$'n': No such file or directory
Tags:

2

Answers


  1. 0

    I’m using this script for this purpose:

    copydep.sh

    #!/bin/bash

if [ ${#} != 2 ]
then
    echo "usage $0 PATH_TO_BINARY target_folder"
    exit 1
fi

path_to_binary="$1"
target_folder="$2"

# if we cannot find the the binary we have to abort
if [ ! -f "${path_to_binary}" ]
then
    echo "The file '${path_to_binary}' was not found. Aborting!"
    exit 1
fi

# copy the binary itself
echo "---> copy binary itself"
cp --parents -v "${path_to_binary}" "${target_folder}"

# copy the library dependencies
echo "---> copy libraries"
ldd "${path_to_binary}" | awk -F'[> ]' '{print $(NF-1)}' | while read -r lib
do
    [ -f "$lib" ] && cp -v --parents "$lib" "${target_folder}"
done

    Run it like this:

    $ mkdir /tmp/test
$ bash copydep.sh /bin/ls /tmp/test
---> copy binary itself
/bin -> /tmp/test/bin
'/bin/ls' -> '/tmp/test/bin/ls'
---> copy libraries
/lib -> /tmp/test/lib
/lib/x86_64-linux-gnu -> /tmp/test/lib/x86_64-linux-gnu
'/lib/x86_64-linux-gnu/libselinux.so.1' -> '/tmp/test/lib/x86_64-linux-gnu/libselinux.so.1'
'/lib/x86_64-linux-gnu/libc.so.6' -> '/tmp/test/lib/x86_64-linux-gnu/libc.so.6'
'/lib/x86_64-linux-gnu/libpcre.so.3' -> '/tmp/test/lib/x86_64-linux-gnu/libpcre.so.3'
'/lib/x86_64-linux-gnu/libdl.so.2' -> '/tmp/test/lib/x86_64-linux-gnu/libdl.so.2'
/lib64 -> /tmp/test/lib64
'/lib64/ld-linux-x86-64.so.2' -> '/tmp/test/lib64/ld-linux-x86-64.so.2'
'/lib/x86_64-linux-gnu/libpthread.so.0' -> '/tmp/test/lib/x86_64-linux-gnu/libpthread.so.0'

# Result:
$ tree /tmp/test/
/tmp/test/
├── bin
│   └── ls
├── lib
│   └── x86_64-linux-gnu
│       ├── libc.so.6
│       ├── libdl.so.2
│       ├── libpcre.so.3
│       ├── libpthread.so.0
│       └── libselinux.so.1
└── lib64
    └── ld-linux-x86-64.so.2

4 directories, 7 files
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  2. 0

    Your deps variable should be an array, created with mapfile and some redirection of process substitution:

    mapfile -t deps < <(ldd /bin/"$app" | grep -o '/lib.*.[0-9]')

    As you have it, it’s treated as a single string, which as you’ve seen, doesn’t work.

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