[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Execution of a data string

From: address@hidden
Subject: Execution of a data string
Date: Wed, 21 Sep 2016 23:15:45 -0400
User-agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0

Configuration Information [Automatically generated, do not change]:
Machine: x86_64
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64' -DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-pc-linux-gnu' -DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPA$
uname output: Linux ks 4.1.0-0.bpo.2-amd64 #1 SMP Debian 4.1.6-1~bpo8+1 (2015-09-09) x86_64 GNU/Linux
Machine Type: x86_64-pc-linux-gnu

Bash Version: 4.3
Patch Level: 30
Release Status: release
You can see in the picture below that:
        declare -a "$ExecuteThisData"
resulted in executing the string "$ExecuteThisData" without
eval being explicitly invoked.  I believe this is unintentional since this is a variable assignment:

                    commands to reproduce above:
ExecuteThisData='a=([$(expr 4 - 3)]=$(echo '1ne' | tr '1' 'o'))'
echo "$b"
echo "$ExecuteThisData"
unset a
declare -a "$ExecuteThisData"
declare -p a
echo ${a[1]}

            Note however that:  {   declare -a a="$Data"  } :

                produces the expected result of assigning each space delimited element to a
                separate array element, and does  not execute the data.
In Summary:

declare -a "$string"       # results in execution of $string
declare -a a=($string)    # does not result in execution of $string

I can't find the compiler version for bash but it is debian jessie's compiled version.  Your response
would be appreciated.

reply via email to

[Prev in Thread] Current Thread [Next in Thread]