\t
is just literal t
here. For tab, use
"$(printf '\t')"
instead.# Want tab
var=foo\tbar
or
# Want linefeed
var=foo\nbar
var="foo$(printf '\t')bar" # As suggested in warning
var="$(printf 'foo\tbar')" # Equivalent alternative
or
# Literal, quoted linefeed
line="foo
bar"
ShellCheck has found a \t
, \n
or
\r
in a context where they just become regular letters
t
, n
or r
. Most likely, it was
intended as a tab, linefeed or carriage return.
To generate such characters (plus other less common ones including
\a
, \f
and octal escapes) , use
printf
as in the example. The exception is for linefeeds
that would be stripped by command substitution; in these cases, use a
literal quoted linefeed instead.
Other characters like \z
generate a SC1001 info message, as the intent is less
certain.
None.
ShellCheck is a static analysis tool for shell scripts. This page is part of its documentation.