bash - How to decode an embedded base64 string? -

i want decode embedded base64 string.

• input line: subscriber,services,,1,dgvsois0oteymzq1njck

• expected output: subscriber,services,,1,tel:+491234567

the base64 string decoded with:

echo 'dgvsois0oteymzq1njck' | base64 -d 

how can decode embedded base64 string?

if want receive second line first line, should this:

mystring="subscriber,services,,1,dgvsois0oteymzq1njck" result="${mystring%,*},$( base64 -d <<< ${mystring##*,} )" echo $result # print "subscriber,services,,1,tel:+491234567" 

if need different records encoded field located in different positions, more complicated