Shell Programming and Scripting

r29829:~# cat conf
# comment
A=1
B=2
# C is set to three
C=3
r29829:~# cat testconf.sh
#!/bin/bash
while IFS="=" read lvalue rvalue; do
        eval $lvalue=$rvalue
done < grep -v '^#' conf
echo "-$A-$B-$C-"
r29829:~# ./testconf.sh
./testconf.sh: line 4: syntax error near unexpected token `-v'
./testconf.sh: line 4: `done < grep -v '^#' conf'

#!/bin/bash
while IFS="=" read lvalue rvalue; do
        eval $lvalue=$rvalue
done < <(grep -v '^#' conf)
echo "-$A-$B-$C-"

grep -v '^#' conf|
{ while IFS="=" read lvalue rvalue; do
        eval $lvalue=$rvalue
  done
  echo "-$A-$B-$C-"
}