[SOLVED] Parsing a multiline variable from a file separated by back slash

Issue

I have an input file like below, its a config file so not a valid shell-script format(format-1):

DATA_DB=foo \
        bar \
        zoo
#may be a comment or not(unreliable content)

Sometimes, the format(format-2) could be as simple as:

DATA_DB=foo1

How, can I extract foo, bar, and zoo from this? I tried sourcing foo.cfg but it didn't work as the values on RHS are not quoted.

Tried using while loop -r but it either work for RHS or LHS.

while IFS='=' read -r key val; do echo "$val" ;done < foo.cgf
foo \

How to extract foo , bar and zoo from format-1, while the same code should extract foo1 from format-2?

Solution

Using any awk:

$ awk '
    sub(/^DATA_DB=/,"") { f=1 }
    f { if ( sub(/\\$/,"") ) { vals=vals $0 OFS } else { $0=vals $0; $1=$1; print; exit } }
' file
foo bar zoo

Answered By - Ed Morton

Answer Checked By - Terry (WPSolving Volunteer)