parsing complex string using shell script

I’m trying the whole day to find a good way for parsing some strings with a shell script. the strings are used as calling parameter for some applications.

they looks like:

parsingParams -c "id=uid5 prog=/opt/bin/example arg="-D -t5 >/dev/null 1>&2" info='fdhff fd'" start

I’m only allowed to use shell-script. I tried to use some sed and cut commands but nothing works fine.

My tries are like:

prog=$(echo $@ | cut -d= -f3 | sed 's|s.*$||')

that return the correct value of prog but for the value of arg I couldn’t find a good way to get it. the info parameter is optional also it may be left. may any one have a good idea that can solve this problem? many thanks in advance

Answer

eval

$ eval "id=uid5 prog=/opt/bin/example arg="-D -t5 >/dev/null 1>&2" info='fdhff fd'"
$ echo $id
uid5
$ echo $prog
/opt/bin/example
$ echo $arg
-D -t5 >/dev/null 1>&2
$ echo $info
fdhff fd