How to find a parameter value using input in shell script -

i have scenario create generic script use input value , actual value config file , use further logic.

pattern.config file type1_path=/path/to/type1 type2_path=/path/to/type2 

i want run script ./run.sh type1 , pattern=$1"_path" $pattern=type1_path. not sure how value of $type1_path config

this bash faq 006.

specifically evaluating indirect/reference variables:

# bash realvariable=contents ref=realvariable echo "${!ref}"   # prints contents of real variable  # ksh93 / mksh / bash 4.3 realvariable=contents typeset -n ref=realvariable echo "${!ref} = $ref"      # prints name , contents of real variable  # zsh realvariable=contents ref=realvariable echo ${(p)ref}   # prints contents of real variable