Adding upstream version 1:10.5.12.upstream/1%10.5.12upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1279 insertions, 0 deletions

diff --git a/scripts/wsrep_sst_common.sh b/scripts/wsrep_sst_common.sh
new file mode 100644
index 00000000..562f9dc3
--- /dev/null
+++ b/scripts/wsrep_sst_common.sh
@@ -0,0 +1,1279 @@
+# Copyright (C) 2017-2021 MariaDB
+# Copyright (C) 2012-2015 Codership Oy
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; see the file COPYING. If not, write to the
+# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston
+# MA  02110-1335  USA.
+
+# This is a common command line parser to be sourced by other SST scripts
+
+set -u
+
+WSREP_SST_OPT_BYPASS=0
+WSREP_SST_OPT_BINLOG=""
+WSREP_SST_OPT_BINLOG_INDEX=""
+WSREP_SST_OPT_LOG_BASENAME=""
+WSREP_SST_OPT_DATA=""
+WSREP_SST_OPT_AUTH="${WSREP_SST_OPT_AUTH:-}"
+WSREP_SST_OPT_USER="${WSREP_SST_OPT_USER:-}"
+WSREP_SST_OPT_PSWD="${WSREP_SST_OPT_PSWD:-}"
+WSREP_SST_OPT_REMOTE_AUTH="${WSREP_SST_OPT_REMOTE_AUTH:-}"
+WSREP_SST_OPT_DEFAULT=""
+WSREP_SST_OPT_DEFAULTS=""
+WSREP_SST_OPT_EXTRA_DEFAULT=""
+WSREP_SST_OPT_EXTRA_DEFAULTS=""
+WSREP_SST_OPT_SUFFIX_DEFAULT=""
+WSREP_SST_OPT_SUFFIX_VALUE=""
+WSREP_SST_OPT_MYSQLD=""
+WSREP_SST_OPT_PORT=""
+WSREP_SST_OPT_ADDR=""
+WSREP_SST_OPT_ADDR_PORT=""
+WSREP_SST_OPT_HOST=""
+WSREP_SST_OPT_HOST_UNESCAPED=""
+WSREP_SST_OPT_HOST_ESCAPED=""
+INNODB_DATA_HOME_DIR="${INNODB_DATA_HOME_DIR:-}"
+INNODB_LOG_GROUP_HOME="${INNODB_LOG_GROUP_HOME:-}"
+INNODB_UNDO_DIR="${INNODB_UNDO_DIR:-}"
+INNOEXTRA=""
+
+while [ $# -gt 0 ]; do
+case "$1" in
+    '--address')
+        WSREP_SST_OPT_ADDR="$2"
+        #
+        # Break address string into host:port/path parts
+        #
+        case "$WSREP_SST_OPT_ADDR" in
+        \[*)
+            # IPv6
+            # Remove the starting and ending square brackets, if present:
+            addr_no_bracket="${WSREP_SST_OPT_ADDR#\[}"
+            # Some utilities and subsequent code require an address
+            # without square brackets:
+            readonly WSREP_SST_OPT_HOST_UNESCAPED="${addr_no_bracket%%\]*}"
+            # Square brackets are needed in most cases:
+            readonly WSREP_SST_OPT_HOST="[${WSREP_SST_OPT_HOST_UNESCAPED}]"
+            readonly WSREP_SST_OPT_HOST_ESCAPED="\\[${WSREP_SST_OPT_HOST_UNESCAPED}\\]"
+            # Mark this address as IPv6:
+            readonly WSREP_SST_OPT_HOST_IPv6=1
+            ;;
+        *)
+            readonly WSREP_SST_OPT_HOST="${WSREP_SST_OPT_ADDR%%[:/]*}"
+            readonly WSREP_SST_OPT_HOST_UNESCAPED="$WSREP_SST_OPT_HOST"
+            readonly WSREP_SST_OPT_HOST_ESCAPED="$WSREP_SST_OPT_HOST"
+            readonly WSREP_SST_OPT_HOST_IPv6=0
+            ;;
+        esac
+        # Let's remove the leading part that contains the host address:
+        remain="${WSREP_SST_OPT_ADDR#$WSREP_SST_OPT_HOST_ESCAPED}"
+        # Let's remove the ":" character that separates the port number
+        # from the hostname:
+        remain="${remain#:}"
+        # Extract the port number from the address - all characters
+        # up to "/" (if present):
+        WSREP_SST_OPT_ADDR_PORT="${remain%%/*}"
+        # If the "/" character is present, then the path is not empty:
+        if [ "${remain#*/}" != "$remain" ]; then
+            # This operation removes everything up to the "/" character,
+            # effectively removing the port number from the string:
+            readonly WSREP_SST_OPT_PATH="${remain#*/}"
+        else
+            readonly WSREP_SST_OPT_PATH=""
+        fi
+        # The rest of the string is the same as the path (for now):
+        remain="$WSREP_SST_OPT_PATH"
+        # If there is one more "/" in the string, then everything before
+        # it will be the module name, otherwise the module name is empty:
+        if [ "${remain%%/*}" != "$remain" ]; then
+            # This operation removes the tail after the very first
+            # occurrence of the "/" character (inclusively):
+            readonly WSREP_SST_OPT_MODULE="${remain%%/*}"
+        else
+            readonly WSREP_SST_OPT_MODULE=""
+        fi
+        # Remove the module name part from the string, which ends with "/":
+        remain="${WSREP_SST_OPT_PATH#*/}"
+        # If the rest of the string does not match the original, then there
+        # was something else besides the module name:
+        if [ "$remain" != "$WSREP_SST_OPT_PATH" ]; then
+            # Extract the part that matches the LSN by removing all
+            # characters starting from the very first "/":
+            readonly WSREP_SST_OPT_LSN="${remain%%/*}"
+            # Exctract everything after the first occurrence of
+            # the "/" character in the string:
+            remain="${remain#*/}"
+            # If the remainder does not match the original string,
+            # then there is something else (the version number in
+            # our case):
+            if [ "$remain" != "$WSREP_SST_OPT_LSN" ]; then
+                # Let's extract the version number by removing the tail
+                # after the very first occurence of the "/" character
+                # (inclusively):
+                readonly WSREP_SST_OPT_SST_VER="${remain%%/*}"
+            else
+                readonly WSREP_SST_OPT_SST_VER=""
+            fi
+        else
+            readonly WSREP_SST_OPT_LSN=""
+            readonly WSREP_SST_OPT_SST_VER=""
+        fi
+        shift
+        ;;
+    '--bypass')
+        WSREP_SST_OPT_BYPASS=1
+        ;;
+    '--datadir')
+        # Let's remove the trailing slash:
+        readonly WSREP_SST_OPT_DATA="${2%/}"
+        shift
+        ;;
+    '--innodb-data-home-dir')
+        # Let's remove the trailing slash:
+        readonly INNODB_DATA_HOME_DIR="${2%/}"
+        shift
+        ;;
+    '--innodb-log-group-home-dir')
+        # Let's remove the trailing slash:
+        readonly INNODB_LOG_GROUP_HOME="${2%/}"
+        shift
+        ;;
+    '--innodb-undo-directory')
+        # Let's remove the trailing slash:
+        readonly INNODB_UNDO_DIR="${2%/}"
+        shift
+        ;;
+    '--defaults-file')
+        readonly WSREP_SST_OPT_DEFAULT="$1=$2"
+        readonly WSREP_SST_OPT_DEFAULTS="$1='$2'"
+        shift
+        ;;
+    '--defaults-extra-file')
+        readonly WSREP_SST_OPT_EXTRA_DEFAULT="$1=$2"
+        readonly WSREP_SST_OPT_EXTRA_DEFAULTS="$1='$2'"
+        shift
+        ;;
+    '--defaults-group-suffix')
+        readonly WSREP_SST_OPT_SUFFIX_DEFAULT="$1=$2"
+        readonly WSREP_SST_OPT_SUFFIX_VALUE="$2"
+        shift
+        ;;
+    '--host')
+        case "$2" in
+        \[*)
+            # IPv6
+            # Remove the starting and ending square brackets, if present:
+            addr_no_bracket="${2#\[}"
+            # Some utilities and subsequent code require an address
+            # without square brackets:
+            readonly WSREP_SST_OPT_HOST_UNESCAPED="${addr_no_bracket%%\]*}"
+            # Square brackets are needed in most cases:
+            readonly WSREP_SST_OPT_HOST="[${WSREP_SST_OPT_HOST_UNESCAPED}]"
+            readonly WSREP_SST_OPT_HOST_ESCAPED="\\[${WSREP_SST_OPT_HOST_UNESCAPED}\\]"
+            # Mark this address as IPv6:
+            readonly WSREP_SST_OPT_HOST_IPv6=1
+            ;;
+        *)
+            readonly WSREP_SST_OPT_HOST="$2"
+            readonly WSREP_SST_OPT_HOST_UNESCAPED="$2"
+            readonly WSREP_SST_OPT_HOST_ESCAPED="$2"
+            readonly WSREP_SST_OPT_HOST_IPv6=0
+            ;;
+        esac
+        WSREP_SST_OPT_ADDR="$WSREP_SST_OPT_HOST"
+        shift
+        ;;
+    '--local-port')
+        readonly WSREP_SST_OPT_LPORT="$2"
+        shift
+        ;;
+    '--parent')
+        readonly WSREP_SST_OPT_PARENT="$2"
+        shift
+        ;;
+    '--password')
+        WSREP_SST_OPT_PSWD="$2"
+        shift
+        ;;
+    '--port')
+        readonly WSREP_SST_OPT_PORT="$2"
+        shift
+        ;;
+    '--role')
+        readonly WSREP_SST_OPT_ROLE="$2"
+        shift
+        ;;
+    '--socket')
+        readonly WSREP_SST_OPT_SOCKET="$2"
+        shift
+        ;;
+    '--user')
+        WSREP_SST_OPT_USER="$2"
+        shift
+        ;;
+    '--gtid')
+        readonly WSREP_SST_OPT_GTID="$2"
+        shift
+        ;;
+    '--binlog'|'--log-bin')
+        readonly WSREP_SST_OPT_BINLOG="$2"
+        shift
+        ;;
+    '--binlog-index'|'--log-bin-index')
+        readonly WSREP_SST_OPT_BINLOG_INDEX="$2"
+        shift
+        ;;
+    '--log-basename')
+        readonly WSREP_SST_OPT_LOG_BASENAME="$2"
+        shift
+        ;;
+    '--gtid-domain-id')
+        readonly WSREP_SST_OPT_GTID_DOMAIN_ID="$2"
+        shift
+        ;;
+    '--mysqld-args')
+        original_cmd=""
+        shift
+        while [ $# -gt 0 ]; do
+           lname="${1#--}"
+           # "--" is interpreted as the end of the list of options:
+           if [ -z "$lname" ]; then
+               shift
+               if [ $# -gt 0 ]; then
+                   # copy "--" to the output string:
+                   original_cmd="$original_cmd --"
+                   # All other arguments must be copied unchanged:
+                   while [ $# -gt 0 ]; do
+                       original_cmd="$original_cmd '$1'"
+                       shift
+                   done
+               fi
+               break;
+           fi
+           # Make sure the argument does not start with "--", otherwise it
+           # is a long option, which is processed after this "if":
+           if [ "$lname" = "$1" ]; then
+               # Check if the argument is the short option or the short
+               # options list, starting with "-":
+               options="${1#-}"
+               if [ "$options" != "$1" -a -n "$options" ]; then
+                   slist=""
+                   while [ -n "$options" ]; do
+                       # Let's separate the first character as the current
+                       # option name:
+                       if [ -n "$BASH_VERSION" ]; then
+                           option="${options:0:1}"
+                       else
+                           # If it's not bash, then we need to use slow
+                           # external utilities:
+                           option=$(echo "$options" | cut -c1-1)
+                       fi
+                       # And the subsequent characters consider option value:
+                       value=""
+                       if [ ${#options} -gt 0 ]; then
+                           value="${options#?}"
+                       fi
+                       # Check for options without argument:
+                       if [ "$option" != '?' -a \
+                            "$option" != 'a' -a \
+                            "$option" != 's' -a \
+                            "$option" != 'v' ]
+                       then
+                           # If the option value is absent, then check
+                           # the following argument:
+                           if [ -z "$value" -a $# -gt 1 ]; then
+                               # if the next argument does not start with
+                               # the "-" character, then next argument is
+                               # the current option value:
+                               if [ "${2#-}" = "$2" ]; then
+                                   shift
+                                   value="$1"
+                               fi
+                           fi
+                           if [ $option = 'h' ]; then
+                               if [ -z "$WSREP_SST_OPT_DATA" ]; then
+                                   MYSQLD_OPT_DATADIR="${value%/}"
+                               fi
+                           elif [ $option != 'u' -a \
+                                  $option != 'P' ]
+                           then
+                               if [ -z "$value" ]; then
+                                   slist="$slist$option"
+                               elif [ -z "$slist" ]; then
+                                   slist="$option '$value'"
+                               else
+                                   slist="$slist -$option '$value'"
+                               fi
+                           fi
+                           break
+
+                       else
+                           slist="$slist$option"
+                       fi
+                       options="$value"
+                   done
+                   if [ -n "$slist" ]; then
+                       original_cmd="$original_cmd -$slist"
+                   fi
+               elif [ -z "$options" ]; then
+                   # We found an equal sign without any characters after it:
+                   original_cmd="$original_cmd -"
+               else
+                   # We found a value that does not start with a minus -
+                   # it is a positional argument or the value of previous
+                   # option. Copy it to output string (as is):
+                   original_cmd="$original_cmd '$1'"
+               fi
+               shift
+               continue;
+           fi
+           # Now we are sure that we are working with an option
+           # that has a "long" name, so remove all characters after
+           # the first equal sign:
+           option="${1%%=*}"
+           # The "--loose-" prefix should not affect the recognition
+           # of the option name:
+           if [ "${option#--loose-}" != "$option" ]; then
+               option="--${option#--loose-}"
+           fi
+           # Some options just need to be removed from the list:
+           if [ "$option" != '--defaults-file' -a \
+                "$option" != '--defaults-extra-file' -a \
+                "$option" != '--defaults-group-suffix' -a \
+                "$option" != '--user' -a \
+                "$option" != '--port' -a \
+                "$option" != '--socket' ]; then
+               value="${1#*=}"
+               if [ "$value" = "$1" ]; then
+                   value=""
+               fi
+               # Let's fill in the variables containing important paths
+               # that might not have been passed through explicit parameters
+               # (+ removing the trailing slash in these paths). Many of these
+               # options are processed internally within scripts or passed
+               # explicitly to other programs, so we need to remove them
+               # from mysqld's argument list:
+               skip_mysqld_arg=0
+               case "$option" in
+                   '--innodb-data-home-dir')
+                       if [ -z "$INNODB_DATA_HOME_DIR" ]; then
+                           MYSQLD_OPT_INNODB_DATA_HOME_DIR="${value%/}"
+                       fi
+                       skip_mysqld_arg=1
+                       ;;
+                   '--innodb-log-group-home-dir')
+                       if [ -z "$INNODB_LOG_GROUP_HOME" ]; then
+                           MYSQLD_OPT_INNODB_LOG_GROUP_HOME="${value%/}"
+                       fi
+                       skip_mysqld_arg=1
+                       ;;
+                   '--innodb-undo-directory')
+                       if [ -z "$INNODB_UNDO_DIR" ]; then
+                           MYSQLD_OPT_INNODB_UNDO_DIR="${value%/}"
+                       fi
+                       skip_mysqld_arg=1
+                       ;;
+                   '--log-bin')
+                       if [ -z "$WSREP_SST_OPT_BINLOG" ]; then
+                           MYSQLD_OPT_LOG_BIN="$value"
+                       fi
+                       skip_mysqld_arg=1
+                       ;;
+                   '--log-bin-index')
+                       if [ -z "$WSREP_SST_OPT_BINLOG_INDEX" ]; then
+                           MYSQLD_OPT_LOG_BIN_INDEX="$value"
+                       fi
+                       skip_mysqld_arg=1
+                       ;;
+                   '--log-basename')
+                       if [ -z "$WSREP_SST_OPT_LOG_BASENAME" ]; then
+                           MYSQLD_OPT_LOG_BASENAME="$value"
+                       fi
+                       skip_mysqld_arg=1
+                       ;;
+                   '--datadir')
+                       if [ -z "$WSREP_SST_OPT_DATA" ]; then
+                           MYSQLD_OPT_DATADIR="${value%/}"
+                       fi
+                       skip_mysqld_arg=1
+                       ;;
+               esac
+               if [ $skip_mysqld_arg -eq 0 ]; then
+                   original_cmd="$original_cmd '$1'"
+               fi
+           fi
+           shift
+        done
+        WSREP_SST_OPT_MYSQLD="${original_cmd# *}"
+        break
+        ;;
+    *) # Must be command usage
+        # exit 1
+        ;;
+esac
+shift
+done
+readonly WSREP_SST_OPT_BYPASS
+
+# The same argument can be present on the command line several
+# times, in this case we must take its last value:
+if [ -n "${MYSQLD_OPT_INNODB_DATA_HOME_DIR:-}" -a \
+     -z "$INNODB_DATA_HOME_DIR" ]; then
+    readonly INNODB_DATA_HOME_DIR="$MYSQLD_OPT_INNODB_DATA_HOME_DIR"
+fi
+if [ -n "${MYSQLD_OPT_INNODB_LOG_GROUP_HOME:-}" -a \
+     -z "$INNODB_LOG_GROUP_HOME" ]; then
+    readonly INNODB_LOG_GROUP_HOME="$MYSQLD_OPT_INNODB_LOG_GROUP_HOME"
+fi
+if [ -n "${MYSQLD_OPT_INNODB_UNDO_DIR:-}" -a \
+     -z "$INNODB_UNDO_DIR" ]; then
+    readonly INNODB_UNDO_DIR="$MYSQLD_OPT_INNODB_UNDO_DIR"
+fi
+if [ -n "${MYSQLD_OPT_LOG_BIN:-}" -a \
+     -z "$WSREP_SST_OPT_BINLOG" ]; then
+    readonly WSREP_SST_OPT_BINLOG="$MYSQLD_OPT_LOG_BIN"
+fi
+if [ -n "${MYSQLD_OPT_LOG_BIN_INDEX:-}" -a \
+     -z "$WSREP_SST_OPT_BINLOG_INDEX" ]; then
+    readonly WSREP_SST_OPT_BINLOG_INDEX="$MYSQLD_OPT_LOG_BIN_INDEX"
+fi
+if [ -n "${MYSQLD_OPT_DATADIR:-}" -a \
+     -z "$WSREP_SST_OPT_DATA" ]; then
+    readonly WSREP_SST_OPT_DATA="$MYSQLD_OPT_DATADIR"
+fi
+if [ -n "${MYSQLD_OPT_LOG_BASENAME:-}" -a \
+     -z "$WSREP_SST_OPT_LOG_BASENAME" ]; then
+    readonly WSREP_SST_OPT_LOG_BASENAME="$MYSQLD_OPT_LOG_BASENAME"
+fi
+
+# If the --log-bin option is present without a value, then
+# set WSREP_SST_OPT_BINLOG value using other arguments:
+if [ -z "$WSREP_SST_OPT_BINLOG" -a -n "${MYSQLD_OPT_LOG_BIN+x}" ]; then
+    if [ -n "$WSREP_SST_OPT_LOG_BASENAME" ]; then
+        # If the WSREP_SST_OPT_BINLOG variable is not set, but
+        # --log-basename is present among the arguments to mysqld,
+        # then set WSREP_SST_OPT_BINLOG equal to the base name with
+        # the "-bin" suffix:
+        readonly WSREP_SST_OPT_BINLOG="$WSREP_SST_OPT_LOG_BASENAME-bin"
+    else
+        # Take the default name:
+        readonly WSREP_SST_OPT_BINLOG='mysql-bin'
+    fi
+fi
+
+# Reconstructing the command line arguments that control the innodb
+# and binlog options:
+if [ -n "$WSREP_SST_OPT_LOG_BASENAME" ]; then
+    if [ -n "$WSREP_SST_OPT_MYSQLD" ]; then
+        WSREP_SST_OPT_MYSQLD="--log-basename='$WSREP_SST_OPT_LOG_BASENAME' $WSREP_SST_OPT_MYSQLD"
+    else
+        WSREP_SST_OPT_MYSQLD="--log-basename='$WSREP_SST_OPT_LOG_BASENAME'"
+    fi
+fi
+if [ -n "$INNODB_DATA_HOME_DIR" ]; then
+    INNOEXTRA="$INNOEXTRA --innodb-data-home-dir='$INNODB_DATA_HOME_DIR'"
+fi
+if [ -n "$INNODB_LOG_GROUP_HOME" ]; then
+    INNOEXTRA="$INNOEXTRA --innodb-log-group-home-dir='$INNODB_LOG_GROUP_HOME'"
+fi
+if [ -n "$INNODB_UNDO_DIR" ]; then
+    INNOEXTRA="$INNOEXTRA --innodb-undo-directory='$INNODB_UNDO_DIR'"
+fi
+if [ -n "$WSREP_SST_OPT_BINLOG" ]; then
+    INNOEXTRA="$INNOEXTRA --log-bin='$WSREP_SST_OPT_BINLOG'"
+    if [ -n "$WSREP_SST_OPT_BINLOG_INDEX" ]; then
+        if [ -n "$WSREP_SST_OPT_MYSQLD" ]; then
+            WSREP_SST_OPT_MYSQLD="--log-bin-index='$WSREP_SST_OPT_BINLOG_INDEX' $WSREP_SST_OPT_MYSQLD"
+        else
+            WSREP_SST_OPT_MYSQLD="--log-bin-index='$WSREP_SST_OPT_BINLOG_INDEX'"
+        fi
+    fi
+fi
+
+readonly WSREP_SST_OPT_MYSQLD
+
+get_binlog()
+{
+    # if no command line argument and WSREP_SST_OPT_BINLOG is not set,
+    # try to get it from my.cnf:
+    if [ -z "$WSREP_SST_OPT_BINLOG" ]; then
+        WSREP_SST_OPT_BINLOG=$(parse_cnf '--mysqld' 'log-bin')
+    fi
+    # if no command line argument and WSREP_SST_OPT_BINLOG_INDEX is not set,
+    # try to get it from my.cnf:
+    if [ -z "$WSREP_SST_OPT_BINLOG_INDEX" ]; then
+        WSREP_SST_OPT_BINLOG_INDEX=$(parse_cnf '--mysqld' 'log-bin-index')
+    fi
+    # if no command line argument and WSREP_SST_OPT_LOG_BASENAME is not set,
+    # try to get it from my.cnf:
+    if [ -z "$WSREP_SST_OPT_LOG_BASENAME" ]; then
+        WSREP_SST_OPT_LOG_BASENAME=$(parse_cnf '--mysqld' 'log-basename')
+    fi
+    if [ -z "$WSREP_SST_OPT_BINLOG" ]; then
+        # If the --log-bin option is specified without a parameter,
+        # then we need to build the name of the index file according
+        # to the rules described in the server documentation:
+        if [ -n "${MYSQLD_OPT_LOG_BIN+x}" -o \
+             $(in_config '--mysqld' 'log-bin') -eq 1 ]
+        then
+            if [ -n "$WSREP_SST_OPT_LOG_BASENAME" ]; then
+                # If the WSREP_SST_OPT_BINLOG variable is not set, but
+                # --log-basename is present among the arguments of mysqld,
+                # then set WSREP_SST_OPT_BINLOG equal to the base name with
+                # the "-bin" suffix:
+                readonly WSREP_SST_OPT_BINLOG="$WSREP_SST_OPT_LOG_BASENAME-bin"
+            else
+                # If the --log-bin option is present without a value, then
+                # we take the default name:
+                readonly WSREP_SST_OPT_BINLOG='mysql-bin'
+            fi
+        fi
+    fi
+    if [ -n "$WSREP_SST_OPT_BINLOG" ]; then
+        # If the name of the index file is not specified, then we will build
+        # it according to the specifications for the server:
+        if [ -z "$WSREP_SST_OPT_BINLOG_INDEX" ]; then
+            if [ -n "$WSREP_SST_OPT_LOG_BASENAME" ]; then
+                # If the WSREP_SST_OPT_BINLOG variable is not set, but
+                # --log-basename is present among the arguments of mysqld,
+                # then set WSREP_SST_OPT_BINLOG equal to the base name with
+                # the "-bin" suffix:
+                readonly WSREP_SST_OPT_BINLOG_INDEX="$WSREP_SST_OPT_LOG_BASENAME-bin.index"
+            else
+                # the default name (note that base of this name
+                # is already defined above):
+                readonly WSREP_SST_OPT_BINLOG_INDEX="$WSREP_SST_OPT_BINLOG.index"
+            fi
+        fi
+    fi
+}
+
+# Check the presence of the port value and, if necessary, transfer
+# the port number from the address to the WSREP_SST_OPT_PORT variable
+# or vice versa, and also, if necessary, substitute the missing port
+# value into the address value:
+if [ -n "$WSREP_SST_OPT_ADDR_PORT" ]; then
+    if [ -n "$WSREP_SST_OPT_PORT" ]; then
+        if [ "$WSREP_SST_OPT_PORT" != "$WSREP_SST_OPT_ADDR_PORT" ]; then
+            echo "WSREP_SST: [ERROR] port in --port=$WSREP_SST_OPT_PORT differs from port in --address=$WSREP_SST_OPT_ADDR" >&2
+            exit 2
+        fi
+    else
+        # If the address contains a port number, assign it to
+        # the corresponding variable:
+        readonly WSREP_SST_OPT_PORT="$WSREP_SST_OPT_ADDR_PORT"
+    fi
+elif [ -n "$WSREP_SST_OPT_ADDR" ]; then
+    # If the port is missing, take the default port:
+    if [ -z "$WSREP_SST_OPT_PORT" ]; then
+        readonly WSREP_SST_OPT_PORT=4444
+    fi
+    WSREP_SST_OPT_ADDR_PORT="$WSREP_SST_OPT_PORT"
+    # Let's remove the leading part that contains the host address:
+    remain="${WSREP_SST_OPT_ADDR#$WSREP_SST_OPT_HOST_ESCAPED}"
+    # Let's remove the ":" character that separates the port number
+    # from the hostname:
+    remain="${remain#:}"
+    # Let's remove all characters upto first "/" character that
+    # separates the hostname with port number from the path:
+    remain="${remain#/}"
+    # Let's construct a new value for the address with the port:
+    WSREP_SST_OPT_ADDR="$WSREP_SST_OPT_HOST:$WSREP_SST_OPT_PORT"
+    if [ -n "$remain" ]; then
+        WSREP_SST_OPT_ADDR="$WSREP_SST_OPT_ADDR/$remain"
+    fi
+fi
+
+readonly WSREP_SST_OPT_ADDR
+readonly WSREP_SST_OPT_ADDR_PORT
+
+# try to use my_print_defaults, mysql and mysqldump that come with the sources
+# (for MTR suite)
+script_binary=$(dirname "$0")
+SCRIPTS_DIR=$(cd "$script_binary"; pwd -P)
+EXTRA_DIR="$SCRIPTS_DIR/../extra"
+CLIENT_DIR="$SCRIPTS_DIR/../client"
+
+if [ -x "$CLIENT_DIR/mysql" ]; then
+    MYSQL_CLIENT="$CLIENT_DIR/mysql"
+else
+    MYSQL_CLIENT="$(command -v mysql)"
+fi
+
+if [ -x "$CLIENT_DIR/mysqldump" ]; then
+    MYSQLDUMP="$CLIENT_DIR/mysqldump"
+else
+    MYSQLDUMP="$(command -v mysqldump)"
+fi
+
+wsrep_log()
+{
+    # echo everything to stderr so that it gets into common error log
+    # deliberately made to look different from the rest of the log
+    local readonly tst="$(date +%Y%m%d\ %H:%M:%S.%N | cut -b -21)"
+    echo "WSREP_SST: $* ($tst)" >&2
+}
+
+wsrep_log_error()
+{
+    wsrep_log "[ERROR] $*"
+}
+
+wsrep_log_warning()
+{
+    wsrep_log "[WARNING] $*"
+}
+
+wsrep_log_info()
+{
+    wsrep_log "[INFO] $*"
+}
+
+if [ -x "$SCRIPTS_DIR/my_print_defaults" ]; then
+    MY_PRINT_DEFAULTS="$SCRIPTS_DIR/my_print_defaults"
+elif [ -x "$EXTRA_DIR/my_print_defaults" ]; then
+    MY_PRINT_DEFAULTS="$EXTRA_DIR/my_print_defaults"
+else
+    MY_PRINT_DEFAULTS="$(command -v my_print_defaults)"
+    if [ -z "$MY_PRINT_DEFAULTS" ]; then
+        wsrep_log_error "my_print_defaults not found in path"
+        exit 2
+    fi
+fi
+
+readonly MY_PRINT_DEFAULTS
+
+wsrep_defaults="$WSREP_SST_OPT_DEFAULTS"
+wsrep_defaults="$wsrep_defaults${wsrep_defaults:+ }$WSREP_SST_OPT_EXTRA_DEFAULTS"
+wsrep_defaults="$wsrep_defaults${wsrep_defaults:+ }$WSREP_SST_OPT_SUFFIX_DEFAULT"
+
+readonly WSREP_SST_OPT_CONF="$wsrep_defaults"
+
+wsrep_defaults="$WSREP_SST_OPT_DEFAULT"
+wsrep_defaults="$wsrep_defaults${wsrep_defaults:+ }$WSREP_SST_OPT_EXTRA_DEFAULT"
+wsrep_defaults="$wsrep_defaults${wsrep_defaults:+ }$WSREP_SST_OPT_SUFFIX_DEFAULT"
+
+readonly WSREP_SST_OPT_CONF_UNQUOTED="$wsrep_defaults"
+
+#
+# User can specify mariabackup specific settings that will be used during sst
+# process like encryption, etc. Parse such configuration option.
+#
+# 1st parameter: group (config file section like sst) or
+#                my_print_defaults argument (like --mysqld)
+# 2nd parameter: var : name of the variable in the section, e.g. server-id
+# 3rd parameter: default value for the parameter
+#
+parse_cnf()
+{
+    local groups="$1"
+    local var="$2"
+    local reval=""
+
+    # normalize the variable names specified in the .cnf file
+    # (user can use '_' or '-', for example, log-bin or log_bin),
+    # then search for the last instance of the desired variable
+    # and finally get the value of that variable (if the variable
+    # was specified several times - we use only its last instance):
+
+    local pattern='BEGIN {OFS=FS="="} {sub(/^--loose/,"-",$0); gsub(/_/,"-",$1); if ($1=="--'"$var"'") lastval=substr($0,length($1)+2)} END {print lastval}'
+
+    while [ -n "$groups" ]; do
+        # Remove the largest suffix starting with the '|' character:
+        local group="${groups%%\|*}"
+        # Remove the remainder (the group name) from the rest
+        # of the groups list (as if it were a prefix):
+        groups="${groups#$group}"
+        groups="${groups#\|}"
+        # If the group name is the same as the "mysqld" without "--" prefix,
+        # then try to use it together with the group suffix:
+        if [ "$group" = 'mysqld' -a -n "$WSREP_SST_OPT_SUFFIX_VALUE" ]; then
+            reval=$("$MY_PRINT_DEFAULTS" \
+                    ${WSREP_SST_OPT_DEFAULT:+"$WSREP_SST_OPT_DEFAULT"} \
+                    ${WSREP_SST_OPT_EXTRA_DEFAULT:+"$WSREP_SST_OPT_EXTRA_DEFAULT"} \
+                    ${WSREP_SST_OPT_SUFFIX_DEFAULT:+"$WSREP_SST_OPT_SUFFIX_DEFAULT"} \
+                    "mysqld$WSREP_SST_OPT_SUFFIX_VALUE" | awk "$pattern")
+            if [ -n "$reval" ]; then
+                break
+            fi
+        fi
+        # Let's try to use the group name as it is:
+        reval=$("$MY_PRINT_DEFAULTS" \
+                ${WSREP_SST_OPT_DEFAULT:+"$WSREP_SST_OPT_DEFAULT"} \
+                ${WSREP_SST_OPT_EXTRA_DEFAULT:+"$WSREP_SST_OPT_EXTRA_DEFAULT"} \
+                ${WSREP_SST_OPT_SUFFIX_DEFAULT:+"$WSREP_SST_OPT_SUFFIX_DEFAULT"} \
+                "$group" | awk "$pattern")
+        if [ -n "$reval" ]; then
+            break
+        fi
+    done
+
+    # Use default if we haven't found a value:
+    if [ -z "$reval" ]; then
+        [ -n "${3:-}" ] && reval="$3"
+    fi
+    echo "$reval"
+}
+
+#
+# This function simply checks for the presence of the parameter
+# in the config file, but does not return its value. It returns "1"
+# (true) even if the parameter is present in the configuration file
+# without a value:
+#
+in_config()
+{
+    local groups="$1"
+    local var="$2"
+    local found=0
+
+    # normalize the variable names specified in the .cnf file
+    # (user can use '_' or '-', for example, log-bin or log_bin),
+    # then search for the last instance(s) of the desired variable:
+
+    local pattern='BEGIN {OFS=FS="="; found=0} {sub(/^--loose/,"-",$0); gsub(/_/,"-",$1); if ($1=="--'"$var"'") found=1} END {print found}'
+
+    while [ -n "$groups" ]; do
+        # Remove the largest suffix starting with the '|' character:
+        local group="${groups%%\|*}"
+        # Remove the remainder (the group name) from the rest
+        # of the groups list (as if it were a prefix):
+        groups="${groups#$group}"
+        groups="${groups#\|}"
+        # If the group name is the same as the "mysqld" without "--" prefix,
+        # then try to use it together with the group suffix:
+        if [ "$group" = 'mysqld' -a -n "$WSREP_SST_OPT_SUFFIX_VALUE" ]; then
+            found=$("$MY_PRINT_DEFAULTS" \
+                    ${WSREP_SST_OPT_DEFAULT:+"$WSREP_SST_OPT_DEFAULT"} \
+                    ${WSREP_SST_OPT_EXTRA_DEFAULT:+"$WSREP_SST_OPT_EXTRA_DEFAULT"} \
+                    ${WSREP_SST_OPT_SUFFIX_DEFAULT:+"$WSREP_SST_OPT_SUFFIX_DEFAULT"} \
+                    "mysqld$WSREP_SST_OPT_SUFFIX_VALUE" | awk "$pattern")
+            if [ $found -ne 0 ]; then
+                break
+            fi
+        fi
+        # Let's try to use the group name as it is:
+        found=$($MY_PRINT_DEFAULTS \
+                ${WSREP_SST_OPT_DEFAULT:+"$WSREP_SST_OPT_DEFAULT"} \
+                ${WSREP_SST_OPT_EXTRA_DEFAULT:+"$WSREP_SST_OPT_EXTRA_DEFAULT"} \
+                ${WSREP_SST_OPT_SUFFIX_DEFAULT:+"$WSREP_SST_OPT_SUFFIX_DEFAULT"} \
+                "$group" | awk "$pattern")
+        if [ $found -ne 0 ]; then
+            break
+        fi
+    done
+    echo $found
+}
+
+wsrep_auth_not_set()
+{
+    [ -z "$WSREP_SST_OPT_AUTH" ]
+}
+
+# Get rid of incorrect values resulting from substitution
+# in programs external to the script:
+if [ "$WSREP_SST_OPT_USER" = '(null)' ]; then
+    WSREP_SST_OPT_USER=""
+fi
+if [ "$WSREP_SST_OPT_PSWD" = '(null)' ]; then
+    WSREP_SST_OPT_PSWD=""
+fi
+if [ "$WSREP_SST_OPT_AUTH" = '(null)' ]; then
+    WSREP_SST_OPT_AUTH=""
+fi
+
+# Let's read the value of the authentication string from the
+# configuration file so that it does not go to the command line
+# and does not appear in the ps output:
+if wsrep_auth_not_set; then
+    WSREP_SST_OPT_AUTH=$(parse_cnf 'sst' 'wsrep-sst-auth')
+fi
+
+# Splitting WSREP_SST_OPT_AUTH as "user:password" pair:
+if ! wsrep_auth_not_set
+then
+    # Extract username as shortest prefix up to first ':' character:
+    WSREP_SST_OPT_AUTH_USER="${WSREP_SST_OPT_AUTH%%:*}"
+    if [ -z "$WSREP_SST_OPT_USER" ]; then
+        # if the username is not in the command line arguments,
+        # set the username and password using WSREP_SST_OPT_AUTH
+        # from the environment:
+        WSREP_SST_OPT_USER="$WSREP_SST_OPT_AUTH_USER"
+        WSREP_SST_OPT_PSWD="${WSREP_SST_OPT_AUTH#*:}"
+    elif [ "$WSREP_SST_OPT_USER" = "$WSREP_SST_OPT_AUTH_USER" ]; then
+        # If the username in the command line arguments and in
+        # the environment variable are the same, set the password
+        # if it was not specified in the command line:
+        if [ -z "$WSREP_SST_OPT_PSWD" ]; then
+            WSREP_SST_OPT_PSWD="${WSREP_SST_OPT_AUTH#*:}"
+        fi
+    else
+        # The username is passed through the command line and does
+        # not match the username in the environment variable - ignore
+        # the environment and rebuild the authentication parameters:
+        WSREP_SST_OPT_AUTH="$WSREP_SST_OPT_USER:$WSREP_SST_OPT_PSWD"
+    fi
+fi
+
+readonly WSREP_SST_OPT_USER
+readonly WSREP_SST_OPT_PSWD
+readonly WSREP_SST_OPT_AUTH
+
+if [ -n "$WSREP_SST_OPT_REMOTE_AUTH" ]
+then
+    # Split auth string at the last ':'
+    readonly WSREP_SST_OPT_REMOTE_USER="${WSREP_SST_OPT_REMOTE_AUTH%%:*}"
+    readonly WSREP_SST_OPT_REMOTE_PSWD="${WSREP_SST_OPT_REMOTE_AUTH#*:}"
+else
+    readonly WSREP_SST_OPT_REMOTE_USER=
+    readonly WSREP_SST_OPT_REMOTE_PSWD=
+fi
+
+readonly WSREP_SST_OPT_REMOTE_AUTH
+
+if [ -n "$WSREP_SST_OPT_DATA" ]
+then
+    SST_PROGRESS_FILE="$WSREP_SST_OPT_DATA/sst_in_progress"
+else
+    SST_PROGRESS_FILE=""
+fi
+
+wsrep_cleanup_progress_file()
+{
+    [ -n "$SST_PROGRESS_FILE" -a \
+      -f "$SST_PROGRESS_FILE" ] && rm -f "$SST_PROGRESS_FILE" 2>/dev/null || true
+}
+
+wsrep_check_program()
+{
+    local prog="$1"
+    local cmd=$(command -v "$prog")
+    if [ -z "$cmd" ]; then
+        echo "'$prog' not found in PATH"
+        return 2 # no such file or directory
+    fi
+}
+
+wsrep_check_programs()
+{
+    local ret=0
+
+    while [ $# -gt 0 ]
+    do
+        wsrep_check_program "$1" || ret=$?
+        shift
+    done
+
+    return $ret
+}
+
+wsrep_check_datadir()
+{
+    if [ -z "$WSREP_SST_OPT_DATA" ]
+    then
+        wsrep_log_error "The '--datadir' parameter must be passed to the SST script"
+        exit 2
+    fi
+}
+
+get_openssl()
+{
+    # If the OPENSSL_BINARY variable is already defined, just return:
+    if [ -n "${OPENSSL_BINARY+x}" ]; then
+        return
+    fi
+    # Let's look for openssl:
+    OPENSSL_BINARY="$(command -v openssl)"
+    if [ -z "$OPENSSL_BINARY" ]; then
+        OPENSSL_BINARY='/usr/bin/openssl'
+        if [ -z "$OPENSSL_BINARY" ]; then
+            OPENSSL_BINARY=""
+        fi
+    fi
+    readonly OPENSSL_BINARY
+}
+
+#
+# Generate a string equivalent to 16 random bytes
+#
+wsrep_gen_secret()
+{
+    get_openssl
+    if [ -n "$OPENSSL_BINARY" ]
+    then
+        echo $("$OPENSSL_BINARY" rand -hex 16)
+    else
+        printf "%04x%04x%04x%04x%04x%04x%04x%04x" \
+                $RANDOM $RANDOM $RANDOM $RANDOM   \
+                $RANDOM $RANDOM $RANDOM $RANDOM
+    fi
+}
+
+#
+# Checking if the address passed to us is local.
+# If the second parameter is nonzero, then this function
+# does not check for matches with local domain names:
+#
+is_local_ip()
+{
+    # Rapid recognition of the most common cases:
+    [ "$1" = '127.0.0.1' -o \
+      "$1" = '127.0.0.2' -o \
+      "$1" = 'localhost' -o \
+      "$1" = '[::1]' ] && return 0
+    # If the address starts with "127." this is probably a local
+    # address, but we need to clarify what follows this prefix:
+    if [ "${1#127.}" != "$1" ]; then
+        # All 127.0.0.0/8 addresses are local:
+        if echo "$1" | grep -q -E '^127\.[0-9]+\.[0-9]+\.[0-9]+$'; then
+            return 0
+        fi
+    fi
+    # If the second parameter is nonzero, then we will skip
+    # the domain name check:
+    if [ "${2:-0}" -eq 0 ]; then
+       # We consider all the names of a given host to be local addresses:
+       [ "$1" = "$(hostname -s)" -o \
+         "$1" = "$(hostname -f)" -o \
+         "$1" = "$(hostname -d)" ] && return 0
+    fi
+    # Now let's check if the given address is assigned to
+    # one of the network cards:
+    local ip_util="$(command -v ip)"
+    if [ -n "$ip_util" ]; then
+        # ip address show ouput format is " inet[6] <address>/<mask>":
+        "$ip_util" address show \
+             | grep -E "^[[:space:]]*inet.? [^[:space:]]+/" -o \
+             | grep -F " $1/" >/dev/null && return 0
+    else
+        local ifconfig_util="$(command -v ifconfig)"
+        if [ -n "$ifconfig_util" ]; then
+            # ifconfig output format is " inet[6] <address> ...":
+            "$ifconfig_util" \
+                 | grep -E "^[[:space:]]*inet.? [^[:space:]]+ " -o \
+                 | grep -F " $1 " >/dev/null && return 0
+        fi
+    fi
+    return 1
+}
+
+check_sockets_utils()
+{
+    lsof_available=0
+    sockstat_available=0
+    ss_available=0
+
+    [ -n "$(command -v lsof)" ] && lsof_available=1
+    [ -n "$(command -v sockstat)" ] && sockstat_available=1
+    [ -n "$(command -v ss)" ] && ss_available=1
+
+    if [ $lsof_available -eq 0 -a \
+         $sockstat_available -eq 0 -a \
+         $ss_available -eq 0 ]
+    then
+        wsrep_log_error "Neither lsof, nor sockstat or ss tool was found in " \
+                        "the PATH. Make sure you have it installed."
+        exit 2 # ENOENT
+    fi
+}
+
+#
+# Check if the port is in the "listen" state.
+# The first parameter is the PID of the process that should
+# listen on the port - if it is not known, you can specify
+# an empty string or zero.
+# The second parameter is the port number.
+# The third parameter is a list of the names of utilities
+# (via "|") that can listen on this port during the state
+# transfer.
+#
+check_port()
+{
+    local pid="$1"
+    local port="$2"
+    local utils="$3"
+
+    [ -z "$pid" ] || [ $pid -eq 0 ] && pid='[0-9]+'
+
+    local rc=1
+
+    if [ $lsof_available -ne 0 ]; then
+        lsof -Pnl -i ":$port" 2>/dev/null | \
+        grep -q -E "^($utils)[^[:space:]]*[[:space:]]+$pid[[:space:]].*\\(LISTEN\\)" && rc=0
+    elif [ $sockstat_available -ne 0 ]; then
+        sockstat -p "$port" 2>/dev/null | \
+        grep -q -E "[[:space:]]+($utils)[^[:space:]]*[[:space:]]+$pid[[:space:]].*[[:space:]]LISTEN" && rc=0
+    elif [ $ss_available -ne 0 ]; then
+        ss -nlpH "( sport = :$port )" 2>/dev/null | \
+        grep -q -E "users:\\(.*\\(\"($utils)[^[:space:]]*\"[^)]*,pid=$pid(,[^)]*)?\\)" && rc=0
+    else
+        wsrep_log_error "unknown sockets utility"
+        exit 2 # ENOENT
+    fi
+
+    return $rc
+}
+
+#
+# If the ssl_dhparams variable is already set, uses that as a source
+# of dh parameters for OpenSSL. Otherwise, looks for dhparams.pem in
+# the datadir, and creates it there if it can't find the file.
+#
+check_for_dhparams()
+{
+    ssl_dhparams="$DATA/dhparams.pem"
+    if [ ! -r "$ssl_dhparams" ]; then
+        get_openssl
+        if [ -n "$OPENSSL_BINARY" ]; then
+            wsrep_log_info "Could not find dhparams file, creating $ssl_dhparams"
+            if ! "$OPENSSL_BINARY" dhparam -out "$ssl_dhparams" 2048 >/dev/null 2>&1
+            then
+                wsrep_log_error "******** ERROR *****************************************"
+                wsrep_log_error "* Could not create the dhparams.pem file with OpenSSL. *"
+                wsrep_log_error "********************************************************"
+                ssl_dhparams=""
+             fi
+        else
+            # Rollback: if openssl is not installed, then use
+            # the default parameters:
+            ssl_dhparams=""
+        fi
+    fi
+}
+
+#
+# Verifies that the CA file verifies the certificate.
+# Doing this here lets us generate better error messages.
+#
+# 1st param: path to the CA file.
+# 2nd param: path to the certificate.
+#
+verify_ca_matches_cert()
+{
+    local ca_path="$1"
+    local cert_path="$2"
+
+    # If the openssl utility is not installed, then
+    # we will not do this certificate check:
+    get_openssl
+    if [ -z "$OPENSSL_BINARY" ]; then
+        return
+    fi
+
+    if ! "$OPENSSL_BINARY" verify -verbose -CAfile "$ca_path" "$cert_path" >/dev/null 2>&1
+    then
+        wsrep_log_error "******** FATAL ERROR ********************************************"
+        wsrep_log_error "* The certifcate and CA (certificate authority) do not match.   *"
+        wsrep_log_error "* It does not appear that the certificate was issued by the CA. *"
+        wsrep_log_error "* Please check your certificate and CA files.                   *"
+        wsrep_log_error "*****************************************************************"
+        exit 22
+    fi
+}
+
+#
+# Verifies that the certificate matches the private key.
+# Doing this will save us having to wait for a timeout that would
+# otherwise occur.
+#
+# 1st param: path to the certificate.
+# 2nd param: path to the private key.
+#
+verify_cert_matches_key()
+{
+    local cert_path="$1"
+    local key_path="$2"
+
+    # If the diff utility is not installed, then
+    # we will not do this certificate check:
+    if [ -z "$(command -v diff)" ]; then
+        return
+    fi
+
+    # If the openssl utility is not installed, then
+    # we will not do this certificate check:
+    get_openssl
+    if [ -z "$OPENSSL_BINARY" ]; then
+        return
+    fi
+
+    # Generate the public key from the cert and the key.
+    # They should match (otherwise we can't create an SSL connection).
+    if ! diff <("$OPENSSL_BINARY" x509 -in "$cert_path" -pubkey -noout 2>/dev/null) \
+              <("$OPENSSL_BINARY" pkey -in "$key_path" -pubout 2>/dev/null) >/dev/null 2>&1
+    then
+        wsrep_log_error "******************* FATAL ERROR ****************"
+        wsrep_log_error "* The certifcate and private key do not match. *"
+        wsrep_log_error "* Please check your certificate and key files. *"
+        wsrep_log_error "************************************************"
+        exit 22
+    fi
+}
+
+#
+# Compares two version strings.
+# The first parameter is the version to be checked;
+# The second parameter is the minimum version required;
+# Returns 1 (failure) if $1 >= $2, 0 (success) otherwise.
+#
+check_for_version()
+{
+    y1="${1#*.}"
+    [ "$y1" = "$1" ] && y1=""
+    z1=${y1#*.}
+    [ "$z1" = "$y1" ] && z1=""
+    x1="${1%%.*}"
+    y1="${y1%%.*}"
+    z1="${z1%%.*}"
+    [ -z "$y1" ] && y1=0
+    [ -z "$z1" ] && z1=0
+    y2="${2#*.}"
+    [ "$y2" = "$2" ] && y2=""
+    z2="${y2#*.}"
+    [ "$z2" = "$y2" ] && z2=""
+    x2="${2%%.*}"
+    y2="${y2%%.*}"
+    z2="${z2%%.*}"
+    [ -z "$y2" ] && y2=0
+    [ -z "$z2" ] && z2=0
+    [ $x1 -lt $x2 ] && return 1
+    [ $x1 -gt $x2 ] && return 0
+    [ $y1 -lt $y2 ] && return 1
+    [ $y1 -gt $y2 ] && return 0
+    [ $z1 -lt $z2 ] && return 1
+    return 0
+}
+
+trim_string()
+{
+    if [ -n "$BASH_VERSION" ]; then
+        local pattern="[![:space:]${2:-}]"
+        local x="${1#*$pattern}"
+        local z=${#1}
+        x=${#x}
+        if [ $x -ne $z ]; then
+            local y="${1%$pattern*}"
+            y=${#y}
+            x=$(( z-x-1 ))
+            y=$(( y-x+1 ))
+            printf '%s' "${1:$x:$y}"
+        else
+            printf ''
+        fi
+    else
+        local pattern="[[:space:]${2:-}]"
+        echo "$1" | sed -E "s/^$pattern+|$pattern+\$//g"
+    fi
+}
+
+#
+# Check whether process is still running.
+# The first parameter contains the name of the PID file.
+# The second parameter is the flag of the need to delete
+# the PID file.
+# If the second parameter is not zero and not empty,
+# then if the process terminates, the corresponding
+# PID file will be deleted.
+# This function also sets the CHECK_PID variable to zero
+# if the process has already exited, or writes the PID
+# of the process there if it is still running.
+#
+check_pid()
+{
+    local pid_file="$1"
+    if [ -r "$pid_file" ]; then
+        local pid=$(cat "$pid_file" 2>/dev/null)
+        if [ -n "$pid" ]; then
+            if [ $pid -ne 0 ]; then
+                if ps -p "$pid" >/dev/null 2>&1; then
+                    CHECK_PID=$pid
+                    return 0
+                fi
+            fi
+        fi
+        local remove=${2:-0}
+        if [ $remove -eq 1 ]; then
+            rm -f "$pid_file"
+        fi
+    fi
+    CHECK_PID=0
+    return 1
+}
+
+#
+# Checking that the process with the specified PID is still
+# running and killing it in this case by sending SIGTERM
+# (using the "kill" operation).
+# The first parameter contains PID of the process.
+# The second and third parameters (both optional) are the names
+# of the PID and the configuration files, which should be removed
+# after the process ends.
+# If the first parameter (PID of the process) is zero, then
+# the function immediately deletes the PID and the configuration
+# files (if specified), without any additional checks.
+#
+cleanup_pid()
+{
+    local pid=$1
+    local pid_file="${2:-}"
+    local config="${3:-}"
+
+    if [ $pid -ne 0 ]; then
+        if ps -p $pid >/dev/null 2>&1; then
+            if kill $pid >/dev/null 2>&1; then
+                sleep 0.5
+                local round=0
+                local force=0
+                while ps -p $pid >/dev/null 2>&1; do
+                   sleep 1
+                   round=$(( round+1 ))
+                   if [ $round -eq 16 ]; then
+                       if [ $force -eq 0 ]; then
+                           round=8
+                           force=1
+                           kill -9 $pid >/dev/null 2>&1
+                           sleep 0.5
+                       else
+                           return 1
+                       fi
+                   fi
+                done
+            elif ps -p $pid >/dev/null 2>&1; then
+                wsrep_log_warning "Unable to kill PID=$pid ($pid_file)"
+                return 1
+            fi
+        fi
+    fi
+
+    [ -n "$pid_file" ] && [ -f "$pid_file" ] && rm -f "$pid_file"
+    [ -n "$config" ]   && [ -f "$config" ]   && rm -f "$config"
+
+    return 0
+}
+
+nproc=""
+
+get_proc()
+{
+    if [ -z "$nproc" ]; then
+        set +e
+        if [ "$OS" = 'Linux' ]; then
+            nproc=$(grep -c processor /proc/cpuinfo 2>/dev/null)
+        elif [ "$OS" = 'Darwin' -o "$OS" = 'FreeBSD' ]; then
+            nproc=$(sysctl -n hw.ncpu)
+        fi
+        if [ -z "$nproc" ] || [ $nproc -eq 0 ]; then
+            nproc=1
+        fi
+        set -e
+    fi
+}