"while read" in a Shell Script and reading from a Variable

sam-y · March 2, 2025 at 5:31 PM

Hi,

on Ubuntu with Bash when i want to read from a variable in "while read" it's possible with:

Code

while read line; do
 echo $line
done <<< $var

This doesn't work in a shell script (shebang = #!/bin/sh) on LibreELEC. I get the error:

Quote

syntax error: unexpected redirection

When i try '<<' instead of '<<<' there is not error but also no echo output.

**mglae** · March 3, 2025 at 4:43 PM

The bash extension "<<<" is not available in busybox ash - even with enabled bash extensions. Use

Bash

while read line; do
 echo $line
done <<EOF
$var
EOF

sam-y · March 3, 2025 at 9:04 PM

OK, this works. Thank you.

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