MDEV-29814: galera_var_notify_ssl_ipv6 causes testing system to hang

This commit fixes the test system hanging due to
the galera_var_notify_ssl_ipv6 test and also brings
the wsrep_notify[_ssl].sh files in line with each other
between the user template and the mtr suite.

Quotes are also added here to avoid problems if the
user specifies the value of one of the variables at the
beginning of the file containing shell-specific characters,
for example, if the password or username specified in the
PSWD and USER variables will contain the "$" character.

Also fixed an issue with automatic --ssl-verify-server-cert
option substitution when the corresponding value is set
by the user to "1" or "on".

Also fixed some tests here to avoid joining one of the nodes
to another cluster when the nodes are restarted from the mtr
side, which can lead to random failures when testing with
buildbot.

2 files changed, 57 insertions, 51 deletions

diff --git a/mysql-test/std_data/wsrep_notify.sh b/mysql-test/std_data/wsrep_notify.sh
index 80333b2eab8..828d5cf99da 100755
--- a/mysql-test/std_data/wsrep_notify.sh
+++ b/mysql-test/std_data/wsrep_notify.sh
@@ -6,30 +6,32 @@
 #
 # Edit parameters below to specify the address and login to server:
 #
-USER=root
-PSWD=
+USER='root'
+PSWD=''
 #
 # If these parameters are not set, then the values
 # passed by the server are taken:
 #
-HOST=127.0.0.1
+HOST="127.0.0.1"
 PORT=$NODE_MYPORT_1
 #
 # Edit parameters below to specify SSL parameters:
 #
-ssl_key=
-ssl_cert=
-ssl_ca=
-ssl_capath=
-ssl_cipher=
-ssl_crl=
-ssl_crlpath=
+ssl_cert=""
+ssl_key=""
+ssl_ca=""
+ssl_capath=""
+ssl_cipher=""
+ssl_crl=""
+ssl_crlpath=""
 ssl_verify_server_cert=0
 #
 # Client executable path:
 #
 CLIENT="$EXE_MYSQL"
-
+#
+# Name of schema and tables:
+#
 SCHEMA="mtr_wsrep_notify"
 MEMB_TABLE="$SCHEMA.membership"
 STATUS_TABLE="$SCHEMA.status"
@@ -65,9 +67,9 @@ configuration_change()
     do
         echo "INSERT INTO $MEMB_TABLE VALUES ( $idx, "
         # Don't forget to properly quote string values
-        echo "'$NODE'" | sed  s/\\//\',\'/g
+        echo "'$NODE'" | sed s/\\//\',\'/g
         echo ");"
-        idx=$(( $idx + 1 ))
+        idx=$(( $idx+1 ))
     done
 
     echo "INSERT INTO $STATUS_TABLE VALUES($idx, $INDEX, '$STATUS', '$CLUSTER_UUID', $PRIMARY);"
@@ -102,34 +104,35 @@ trim_string()
     fi
 }
 
-COM=status_update # not a configuration change by default
+COM='status_update' # not a configuration change by default
 
 STATUS=""
 CLUSTER_UUID=""
-PRIMARY="0"
+PRIMARY=0
 INDEX=""
 MEMBERS=""
 
 while [ $# -gt 0 ]; do
     case $1 in
-    --status)
+    '--status')
         STATUS=$(trim_string "$2")
         shift
         ;;
-    --uuid)
+    '--uuid')
         CLUSTER_UUID=$(trim_string "$2")
         shift
         ;;
-    --primary)
-        [ "$2" = "yes" ] && PRIMARY="1" || PRIMARY="0"
-        COM=configuration_change
+    '--primary')
+        arg=$(trim_string "$2")
+        [ "$arg" = 'yes' ] && PRIMARY=1 || PRIMARY=0
+        COM='configuration_change'
         shift
         ;;
-    --index)
+    '--index')
         INDEX=$(trim_string "$2")
         shift
         ;;
-    --members)
+    '--members')
         MEMBERS=$(trim_string "$2")
         shift
         ;;
@@ -168,9 +171,7 @@ ssl_verify_server_cert=$(trim_string "$ssl_verify_server_cert");
 
 SSL_PARAM=""
 
-if [ -n "$ssl_key" -o -n "$ssl_cert" -o \
-     -n "$ssl_ca"  -o -n "$ssl_capath" -o \
-     -n "$ssl_cipher" ]
+if [ -n "$ssl_key$ssl_cert$ssl_ca$ssl_capath$ssl_cipher$ssl_crl$ssl_crlpath" ]
 then
     SSL_PARAM=' --ssl'
     [ -n "$ssl_key" ]     && SSL_PARAM="$SSL_PARAM --ssl-key='$ssl_key'"
@@ -181,8 +182,10 @@ then
     [ -n "$ssl_crl" ]     && SSL_PARAM="$SSL_PARAM --ssl-crl='$ssl_crl'"
     [ -n "$ssl_crlpath" ] && SSL_PARAM="$SSL_PARAM --ssl-crlpath='$ssl_crlpath'"
     if [ -n "$ssl_verify_server_cert" ]; then
-        if [ $ssl_verify_server_cert -ne 0 ]; then
-            SSL_PARAM+=' --ssl-verify-server-cert'
+        if [ "$ssl_verify_server_cert" != "0" -o \
+             "$ssl_verify_server_cert" = "on" ]
+        then
+            SSL_PARAM="$SSL_PARAM --ssl-verify-server-cert"
         fi
     fi
 fi
diff --git a/mysql-test/std_data/wsrep_notify_ssl.sh b/mysql-test/std_data/wsrep_notify_ssl.sh
index 6c96db1a4e5..ce5e3f8c695 100755
--- a/mysql-test/std_data/wsrep_notify_ssl.sh
+++ b/mysql-test/std_data/wsrep_notify_ssl.sh
@@ -6,13 +6,13 @@
 #
 # Edit parameters below to specify the address and login to server:
 #
-USER=root
-PSWD=
+USER='root'
+PSWD=''
 #
 # If these parameters are not set, then the values
 # passed by the server are taken:
 #
-HOST=127.0.0.1
+HOST="127.0.0.1"
 PORT=$NODE_MYPORT_1
 #
 # Edit parameters below to specify SSL parameters:
@@ -20,16 +20,18 @@ PORT=$NODE_MYPORT_1
 ssl_cert="$MYSQL_TEST_DIR/std_data/client-cert.pem"
 ssl_key="$MYSQL_TEST_DIR/std_data/client-key.pem"
 ssl_ca="$MYSQL_TEST_DIR/std_data/cacert.pem"
-ssl_capath=
-ssl_cipher=
-ssl_crl=
-ssl_crlpath=
+ssl_capath=""
+ssl_cipher=""
+ssl_crl=""
+ssl_crlpath=""
 ssl_verify_server_cert=0
 #
 # Client executable path:
 #
 CLIENT="$EXE_MYSQL"
-
+#
+# Name of schema and tables:
+#
 SCHEMA="mtr_wsrep_notify"
 MEMB_TABLE="$SCHEMA.membership"
 STATUS_TABLE="$SCHEMA.status"
@@ -65,9 +67,9 @@ configuration_change()
     do
         echo "INSERT INTO $MEMB_TABLE VALUES ( $idx, "
         # Don't forget to properly quote string values
-        echo "'$NODE'" | sed  s/\\//\',\'/g
+        echo "'$NODE'" | sed s/\\//\',\'/g
         echo ");"
-        idx=$(( $idx + 1 ))
+        idx=$(( $idx+1 ))
     done
 
     echo "INSERT INTO $STATUS_TABLE VALUES($idx, $INDEX, '$STATUS', '$CLUSTER_UUID', $PRIMARY);"
@@ -102,34 +104,35 @@ trim_string()
     fi
 }
 
-COM=status_update # not a configuration change by default
+COM='status_update' # not a configuration change by default
 
 STATUS=""
 CLUSTER_UUID=""
-PRIMARY="0"
+PRIMARY=0
 INDEX=""
 MEMBERS=""
 
 while [ $# -gt 0 ]; do
     case $1 in
-    --status)
+    '--status')
         STATUS=$(trim_string "$2")
         shift
         ;;
-    --uuid)
+    '--uuid')
         CLUSTER_UUID=$(trim_string "$2")
         shift
         ;;
-    --primary)
-        [ "$2" = "yes" ] && PRIMARY="1" || PRIMARY="0"
-        COM=configuration_change
+    '--primary')
+        arg=$(trim_string "$2")
+        [ "$arg" = 'yes' ] && PRIMARY=1 || PRIMARY=0
+        COM='configuration_change'
         shift
         ;;
-    --index)
+    '--index')
         INDEX=$(trim_string "$2")
         shift
         ;;
-    --members)
+    '--members')
         MEMBERS=$(trim_string "$2")
         shift
         ;;
@@ -168,9 +171,7 @@ ssl_verify_server_cert=$(trim_string "$ssl_verify_server_cert");
 
 SSL_PARAM=""
 
-if [ -n "$ssl_key" -o -n "$ssl_cert" -o \
-     -n "$ssl_ca"  -o -n "$ssl_capath" -o \
-     -n "$ssl_cipher" ]
+if [ -n "$ssl_key$ssl_cert$ssl_ca$ssl_capath$ssl_cipher$ssl_crl$ssl_crlpath" ]
 then
     SSL_PARAM=' --ssl'
     [ -n "$ssl_key" ]     && SSL_PARAM="$SSL_PARAM --ssl-key='$ssl_key'"
@@ -181,8 +182,10 @@ then
     [ -n "$ssl_crl" ]     && SSL_PARAM="$SSL_PARAM --ssl-crl='$ssl_crl'"
     [ -n "$ssl_crlpath" ] && SSL_PARAM="$SSL_PARAM --ssl-crlpath='$ssl_crlpath'"
     if [ -n "$ssl_verify_server_cert" ]; then
-        if [ $ssl_verify_server_cert -ne 0 ]; then
-            SSL_PARAM+=' --ssl-verify-server-cert'
+        if [ "$ssl_verify_server_cert" != "0" -o \
+             "$ssl_verify_server_cert" = "on" ]
+        then
+            SSL_PARAM="$SSL_PARAM --ssl-verify-server-cert"
         fi
     fi
 fi