Pattern: Use of read
with unquoted []
Issue: -
ShellCheck found an array element passed to read, where the []
was not quoted. This means the array index [index]
will be treated as a glob range, and the word may be replaced or trigger failglob
.
In the problematic example, having a directory named food
will cause the command to become read -r food
instead, since food
matches the glob foo[index]
. The result is assigning a value to the wrong variable.
Quote or escape the pattern as shown to ensure it always reads into the array foo
at index index
.
Example of incorrect code:
read -r foo[index]
Example of correct code:
read -r "foo[index]"