When /var/log/auth.log is checked, flush file system buffers.

And add debug information (content of /var/log/auth.log).

tests/su/04/su_user_wrong_passwd_syslog.test

@@ -20,6 +20,13 @@ change_config
 
 echo
 
+echo -n "Syncing disks..."
+sync
+echo "OK"
+echo "auth.log contains:"
+echo "======================================================================="
+cat /var/log/auth.log
+echo "======================================================================="
 echo -n "Looking for 'FAILED su for myuser by testsuite' in /var/log/auth.log..."
 grep -q "FAILED su for myuser by testsuite" /var/log/auth.log
 echo "OK"

tests/su/05/su_user_wrong_passwd_syslog.test

@@ -20,13 +20,13 @@ change_config
 
 echo
 
+echo -n "Syncing disks..."
+sync
+echo "OK"
 echo "auth.log contains:"
 echo "======================================================================="
 cat /var/log/auth.log
 echo "======================================================================="
-echo "Syncing disks..."
-sync
-echo "OK"
 echo -n "Looking for 'FAILED su for myuser by testsuite' in /var/log/auth.log..."
 grep -q "FAILED su for myuser by testsuite" /var/log/auth.log
 echo "OK"

tests/su/06/su_user_syslog.test

@@ -19,6 +19,13 @@ change_config
 ./run_su.exp myuser myuserF00barbaz '$ '
 
 echo
+echo -n "Syncing disks..."
+sync
+echo "OK"
+echo "auth.log contains:"
+echo "======================================================================="
+cat /var/log/auth.log
+echo "======================================================================="
 echo -n "Looking for 'Successful su for myuser by testsuite' in /var/log/auth.log..."
 grep -q "Successful su for myuser by testsuite" /var/log/auth.log
 echo "OK"

tests/su/07/su_user_syslog.test

@@ -24,6 +24,13 @@ change_config
 ./run_su.exp myuser myuserF00barbaz '$ '
 
 echo
+echo -n "Syncing disks..."
+sync
+echo "OK"
+echo "auth.log contains:"
+echo "======================================================================="
+cat /var/log/auth.log
+echo "======================================================================="
 echo -n "Looking for 'Successful su for myuser by testsuite' in /var/log/auth.log..."
 grep -q "Successful su for myuser by testsuite" /var/log/auth.log
 echo "OK"