MDEV-16548 - Innodb fails to start on older kernels that don't support F_DUPFD_CLOEXEC

InnoDB duplicates file descriptor returned by create_temp_file() to
workaround further inconsistent use of this descriptor.

Use mysys file descriptors consistently for innobase_mysql_tmpfile(NULL).
Mostly close it by appropriate mysys wrappers.

storage/innobase/dict/dict0dict.cc

@@ -6436,7 +6436,7 @@ void dict_sys_t::close()
 
   if (dict_foreign_err_file)
   {
-    fclose(dict_foreign_err_file);
+    my_fclose(dict_foreign_err_file, MYF(MY_WME));
     dict_foreign_err_file = NULL;
   }
 

storage/innobase/lock/lock0lock.cc

@@ -557,7 +557,7 @@ void lock_sys_t::close()
 	if (!m_initialised) return;
 
 	if (lock_latest_err_file != NULL) {
-		fclose(lock_latest_err_file);
+		my_fclose(lock_latest_err_file, MYF(MY_WME));
 		lock_latest_err_file = NULL;
 	}
 

storage/innobase/os/os0file.cc

@@ -1131,23 +1131,14 @@ os_file_create_tmpfile()
 {
 	FILE*	file	= NULL;
 	WAIT_ALLOW_WRITES();
-	os_file_t	fd	= innobase_mysql_tmpfile(NULL);
+	File	fd	= mysql_tmpfile("ib");
 
-	if (fd != OS_FILE_CLOSED) {
-#ifdef _WIN32
-		int crt_fd = _open_osfhandle((intptr_t)HANDLE(fd), 0);
-		if (crt_fd != -1) {
-			file = fdopen(crt_fd, "w+b");
-			if (!file) {
-				close(crt_fd);
-			}
-		}
-#else
-		file = fdopen(fd, "w+b");
+	if (fd >= 0) {
+		file = my_fdopen(fd, 0, O_RDWR|O_TRUNC|O_CREAT|FILE_BINARY,
+				 MYF(MY_WME));
 		if (!file) {
-			close(fd);
+			my_close(fd, MYF(MY_WME));
 		}
-#endif
 	}
 
 	if (file == NULL) {
@@ -2145,7 +2136,7 @@ and native aio.
 bool
 AIO::is_linux_native_aio_supported()
 {
-	int		fd;
+	File		fd;
 	io_context_t	io_ctx;
 	char		name[1000];
 
@@ -2158,7 +2149,7 @@ AIO::is_linux_native_aio_supported()
 	} else if (!srv_read_only_mode) {
 
 		/* Now check if tmpdir supports native aio ops. */
-		fd = innobase_mysql_tmpfile(NULL);
+		fd = mysql_tmpfile("ib");
 
 		if (fd < 0) {
 			ib::warn()
@@ -2185,7 +2176,7 @@ AIO::is_linux_native_aio_supported()
 
 		strcpy(name + dirnamelen, "ib_logfile0");
 
-		fd = open(name, O_RDONLY | O_CLOEXEC);
+		fd = my_open(name, O_RDONLY | O_CLOEXEC, MYF(0));
 
 		if (fd == -1) {
 
@@ -2230,7 +2221,7 @@ AIO::is_linux_native_aio_supported()
 	}
 
 	ut_free(buf);
-	close(fd);
+	my_close(fd, MYF(MY_WME));
 
 	switch (err) {
 	case 1:

storage/innobase/srv/srv0start.cc

@@ -1422,7 +1422,9 @@ dberr_t srv_start(bool create_new_db)
 				fil_path_to_mysql_datadir,
 				os_proc_get_number());
 
-			srv_monitor_file = fopen(srv_monitor_file_name, "w+");
+			srv_monitor_file = my_fopen(srv_monitor_file_name,
+						    O_RDWR|O_TRUNC|O_CREAT,
+						    MYF(MY_WME));
 
 			if (!srv_monitor_file) {
 				ib::error() << "Unable to create "
@@ -2458,7 +2460,7 @@ void innodb_shutdown()
 	srv_shutdown_all_bg_threads();
 
 	if (srv_monitor_file) {
-		fclose(srv_monitor_file);
+		my_fclose(srv_monitor_file, MYF(MY_WME));
 		srv_monitor_file = 0;
 		if (srv_monitor_file_name) {
 			unlink(srv_monitor_file_name);
@@ -2467,7 +2469,7 @@ void innodb_shutdown()
 	}
 
 	if (srv_misc_tmpfile) {
-		fclose(srv_misc_tmpfile);
+		my_fclose(srv_misc_tmpfile, MYF(MY_WME));
 		srv_misc_tmpfile = 0;
 	}