First implementation of instance-manager carcass:

logging, options, angel process.

server-tools/instance-manager/manager.cc

@@ -0,0 +1,70 @@
+/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
+
+   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; either version 2 of the License, or
+   (at your option) any later version.
+
+   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; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+#include <my_global.h>
+#include "log.h"
+
+//#include "mysql_connection.h"
+
+void manager(const char *socket_file_name)
+{
+  while (true)
+  {
+    log_info("manager is alive");
+    sleep(2);
+  }
+#if 0
+  /*
+    Dummy manager implementation: listens on a UNIX socket and
+    starts echo server in a dedicated thread for each accepted connection.
+    Enough to test startup/shutdown/options/logging of the instance manager.
+  */
+
+  int fd= socket(AF_UNIX, SOCK_STREAM, 0);
+  
+  if (!fd)
+    die("socket(): failed");
+
+  struct sockaddr_un address;
+  bzero(&address, sizeof(address));
+  address.sun_family= AF_UNIX;
+  strcpy(address.sun_path, socket_path);
+  int opt= 1;
+
+  if (unlink(socket_path) ||
+      bind(fd, (struct sockaddr *) &address, sizeof(address)) ||
+      setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)))
+    die("unlink | bind | setsockopt failed");
+  
+  if (listen(fd, 5))
+    die("listen() failed");
+  
+  int client_fd;
+  while ((client_fd= accept(fd, 0, 0)) != -1);
+  {
+    printf("accepted\n");
+    const char *message= "\n10hel";
+    send(client_fd, message, strlen(message), 0);
+
+    int sleep_seconds= argc > 1 && atoi(argv[1]) ? atoi(argv[1]) : 1;
+    printf("sleeping %d seconds\n", sleep_seconds);
+    sleep(sleep_seconds);
+    close(client_fd);
+  }
+  printf("accept(): failed\n");
+  close(fd);
+#endif
+}