foo
. Remove $
/${}
for that, or use ${var?}
to quiet.read $foo
read foo
read
takes a variable name, but shellcheck has noticed
that you give it an expanded variable instead. This will populate
whatever the variable expans to instead of the variable itself. For
example:
foo=bar
read $foo # Reads data into 'bar', not into 'foo'
read foo # Reads data into 'foo'
If this is intentional and you do want to read a variable through an indirect reference, you can silence this warning with a directive:
# shellcheck disable=SC2229
read "$foo"
Or take advantage of the fact that ShellCheck only warns when no parameter expansion modifiers are applied:
read "${foo}" # ShellCheck warns
read "${foo?}" # No warning
${foo?}
fails when foo
is unset, which is
fine since read
would have failed too. The main side effect
is an improved runtime error message in that case.
read $foo
ShellCheck is a static analysis tool for shell scripts. This page is part of its documentation.