commit 166afaf144d6473464975438353257359dd51708
Author: Andreas Wiese <andreas.wiese@kernkonzept.com>
Date:   Thu Feb 1 11:35:02 2024 +0100

    aa-remove-unknown: fix readability check
    
    This check is intended for ensuring that the profiles file can actually
    be opened.  The *actual* check is performed by the shell, not the read
    utility, which won't even be executed if the input redirection (and
    hence the test) fails.
    
    If the test succeeds, though, using `read` here might actually
    jeopardize the test result if there are no profiles loaded and the file
    is empty.
    
    This commit fixes that case by simply using `true` instead of `read`.

diff --git a/utils/aa-remove-unknown b/utils/aa-remove-unknown
index 0e00d6a0..3351feef 100755
--- a/utils/aa-remove-unknown
+++ b/utils/aa-remove-unknown
@@ -63,7 +63,7 @@ fi
 # We have to do this check because error checking awk's getline() below is
 # tricky and, as is, results in an infinite loop when apparmorfs returns an
 # error from open().
-if ! IFS= read -r _ < "$PROFILES" ; then
+if ! true < "$PROFILES" ; then
 	echo "ERROR: Unable to read apparmorfs profiles file" 1>&2
 	exit 1
 elif [ ! -w "$REMOVE" ] ; then