Allow file_ownership_var_log_audit_stig to check effective log files

[alanmcanonical]

Description:

• Allow space-starting entries in audit.conf
• Check effective log file in oval for Ubuntu
• Simplfy test scripts
• Enable test scripts for ubuntu

Rationale:

• Test result on Ubuntu

INFO - The base image option has not been specified, choosing libvirt-based test environment.
INFO - Logging into /home/alan.moore@canonical.com/dev/cac/content/logs/rule-custom-2026-09-10-1652/test_suite.log
INFO - xccdf_org.ssgproject.content_rule_file_ownership_var_log_audit_stig
INFO - Script correct_value_default_file.pass.sh using profile (all) OK
INFO - Script wrong_value_default_file.fail.sh using profile (all) OK
INFO - Script correct_value.pass.sh using profile (all) OK
INFO - Script wrong_value.fail.sh using profile (all) OK

[openshift-ci]

Hi @alanmcanonical. Thanks for your PR.

I'm waiting for a ComplianceAsCode member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work.

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[github-actions]

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bash remediation for rule 'xccdf_org.ssgproject.content_rule_file_ownership_var_log_audit_stig' differs.
--- xccdf_org.ssgproject.content_rule_file_ownership_var_log_audit_stig
+++ xccdf_org.ssgproject.content_rule_file_ownership_var_log_audit_stig
@@ -1,12 +1,12 @@
 # Remediation is applicable only in certain platforms
 if rpm --quiet -q audit && rpm --quiet -q kernel; then
 
-if LC_ALL=C grep -iw log_file /etc/audit/auditd.conf; then
-    FILE=$(awk -F "=" '/^log_file/ {print $2}' /etc/audit/auditd.conf | tr -d ' ')
-    chown root $FILE*
-else
-    chown root /var/log/audit/audit.log*
+if LC_ALL=C grep -iqE '^[[:space:]]*log_file\b' /etc/audit/auditd.conf; then
+    FILE=$(awk -F "=" '/^[[:space:]]*log_file[[:space:]]*=/ {print $2}' /etc/audit/auditd.conf | tr -d ' ')
 fi
+
+FILE=${FILE:-/var/log/audit/audit.log}
+chown root "$(dirname "$FILE")"/*
 
 else
     >&2 echo 'Remediation is not applicable, nothing was done'