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aa-remove-unknown: fix readability check

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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`.
This commit is contained in:
Andreas Wiese 2024-02-01 11:35:02 +01:00 • committed by Grimmauld
parent 420945139c
commit b4aa00de51
Signed by untrusted user: Grimmauld
GPG key ID: C2946668769F91FB
1 changed files with 1 additions and 1 deletions
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utils/aa-remove-unknown
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@ -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