Disable tests where fs perms are incorrect

Some tests have strict requirements on the filesystem permissions
for certain files and directories. This adds a regress/check-perm
tool that copies the relevant logic from sshd to exactly test
the paths in question. This lets us skip tests when the local
filesystem doesn't conform to our expectations rather than
continuing and failing the test run.

ok dtucker@

1 files changed, 7 insertions, 0 deletions

diff --git a/regress/principals-command.sh b/regress/principals-command.sh
index b90a8cf2c..c0be7e747 100644
--- a/regress/principals-command.sh
+++ b/regress/principals-command.sh
@@ -24,6 +24,13 @@ _EOF
 test $? -eq 0 || fatal "couldn't prepare principals command"
 $SUDO chmod 0755 "$PRINCIPALS_CMD"
 
+if ! $OBJ/check-perm -m keys-command $PRINCIPALS_CMD ; then
+        echo "skipping: $PRINCIPALS_CMD is unsuitable as " \
+            "AuthorizedPrincipalsCommand"
+        $SUDO rm -f $PRINCIPALS_CMD
+        exit 0
+fi
+
 # Create a CA key and a user certificate.
 ${SSHKEYGEN} -q -N '' -t ed25519  -f $OBJ/user_ca_key || \
         fatal "ssh-keygen of user_ca_key failed"