Merge branch '10.3' into bb-10.3-release

VERSION

 MYSQL_VERSION_MAJOR=10
 MYSQL_VERSION_MINOR=3
-MYSQL_VERSION_PATCH=37
+MYSQL_VERSION_PATCH=38
 SERVER_MATURITY=stable

extra/mariabackup/xtrabackup.cc

@@ -3578,10 +3578,6 @@ static dberr_t xb_assign_undo_space_start()
 	ulint		space;
 	int n_retries = 5;
 
-	if (srv_undo_tablespaces == 0) {
-		return error;
-	}
-
 	file = os_file_create(0, srv_sys_space.first_datafile()->filepath(),
 		OS_FILE_OPEN, OS_FILE_NORMAL, OS_DATA_FILE, true, &ret);
 

include/my_alarm.h

@@ -31,7 +31,9 @@ extern ulong my_time_to_wait_for_lock;
 #include <signal.h>
 #ifdef HAVE_SIGHANDLER_T
 #define sig_return sighandler_t
-#elif defined(SOLARIS) || defined(__sun) || defined(__APPLE__)
+#elif defined(SOLARIS) || defined(__sun) || defined(__APPLE__) || \
+    defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || \
+    defined(__DragonFly__)
 typedef void (*sig_return)(int); /* Returns type from signal */
 #else
 typedef void (*sig_return)(void); /* Returns type from signal */

man/mysqld_safe.1

@@ -340,7 +340,9 @@ program to set the server\'s scheduling priority to the given value\&.
 .\}
 .\" mysqld_safe: no-auto-restart option
 .\" no-auto-restart option: mysqld_safe
-\fB\-\-no\-auto\-restart\fR
+\fB\-\-no\-auto\-restart\fR,
+\fB\-\-nowatch\fR,
+\fB\-\-no\-watch\fR
 .sp
 Exit after starting mysqld\&.
 .RE
@@ -368,21 +370,6 @@ Do not read any option files\&. This must be the first option on the command lin
 .sp -1
 .IP \(bu 2.3
 .\}
-.\" mysqld_safe: no-watch option
-.\" no-watch option: mysqld_safe
-\fB\-\-no\-auto\-restart\fR
-.sp
-Exit after starting mysqld\&.
-.RE
-.sp
-.RS 4
-.ie n \{\
-\h'-04'\(bu\h'+03'\c
-.\}
-.el \{\
-.sp -1
-.IP \(bu 2.3
-.\}
 .\" mysqld_safe: numa-interleave option
 .\" numa-interleave option: mysqld_safe
 \fB\-\-numa\-interleave\fR

mysql-test/suite/mariabackup/full_backup.opt

+--innodb_undo_tablespaces=2

mysql-test/suite/mariabackup/full_backup.result

@@ -12,3 +12,17 @@ SELECT * FROM t;
 i
 1
 DROP TABLE t;
+#
+#  MDEV-27121 mariabackup incompatible with disabled dedicated
+#                  undo log tablespaces
+#
+call mtr.add_suppression("InnoDB: innodb_undo_tablespaces=0 disables dedicated undo log tablespaces");
+# xtrabackup backup
+# xtrabackup prepare
+# shutdown server
+# remove datadir
+# xtrabackup move back
+# restart server
+# Display undo log files from target directory
+undo001
+undo002

mysql-test/suite/mariabackup/full_backup.test

@@ -29,3 +29,27 @@ SELECT * FROM t;
 DROP TABLE t;
 rmdir $targetdir;
 
+--echo #
+--echo #  MDEV-27121 mariabackup incompatible with disabled dedicated
+--echo #                  undo log tablespaces
+--echo #
+call mtr.add_suppression("InnoDB: innodb_undo_tablespaces=0 disables dedicated undo log tablespaces");
+
+let $restart_parameters=--innodb_undo_tablespaces=0;
+--source include/restart_mysqld.inc
+
+echo # xtrabackup backup;
+--disable_result_log
+exec $XTRABACKUP --defaults-file=$MYSQLTEST_VARDIR/my.cnf --backup --target-dir=$targetdir;
+--enable_result_log
+
+echo # xtrabackup prepare;
+--disable_result_log
+exec $XTRABACKUP  --prepare --target-dir=$targetdir;
+-- source include/restart_and_restore.inc
+--enable_result_log
+
+--echo # Display undo log files from target directory
+list_files $targetdir undo*;
+
+rmdir $targetdir;

mysys/my_addr_resolve.c

@@ -202,7 +202,7 @@ int start_addr2line_fork(const char *binary_path)
     close(out[0]);
     close(out[1]);
     execlp("addr2line", "addr2line", "-C", "-f", "-e", binary_path, NULL);
-    exit(1);
+    _exit(1);
   }
 
   close(in[0]);

mysys/my_gethwaddr.c

@@ -33,8 +33,14 @@ static my_bool memcpy_and_test(uchar *to, uchar *from, uint len)
   return res;
 }
 
-#if defined(__APPLE__) || defined(__FreeBSD__)
+#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__OpenBSD__)
+#ifdef __OpenBSD__
+#include <netinet/in.h>
+#include <net/if_arp.h>
+#include <netinet/if_ether.h>
+#else
 #include <net/ethernet.h>
+#endif
 #include <sys/sysctl.h>
 #include <net/route.h>
 #include <net/if.h>

sql/mysqld.cc

@@ -4580,8 +4580,8 @@ static int init_common_variables()
     files= my_set_max_open_files(max_open_files);
     SYSVAR_AUTOSIZE_IF_CHANGED(open_files_limit, files, ulong);
 
-    if (files < wanted_files && global_system_variables.log_warnings)
-      sql_print_warning("Could not increase number of max_open_files to more than %u (request: %u)", files, wanted_files);
+    if (files < max_open_files && global_system_variables.log_warnings)
+      sql_print_warning("Could not increase number of max_open_files to more than %u (request: %u)", files, max_open_files);
 
     /* If we required too much tc_instances than we reduce */
     SYSVAR_AUTOSIZE_IF_CHANGED(tc_instances,