Changes in repmgr are:

- Add checks to test if the directories are useful for us (basically
  the checks follow the same approach as initdb does)
- Add connection parameters
- Better use of rsync
- Some more clean up of code

Changes in repmgrd are:
- Add a parameter to allow the user specify an repmgr.conf
- Change the name of the repl_status table for repl_monitor
- Create a repl_status view that also shows lag in time
- Some more clean up of code

check_dir.c

@@ -0,0 +1,93 @@
+/*
+ * check_dir.c
+ * Copyright (c) 2ndQuadrant, 2010
+ *
+ * Directories management functions
+ */
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <dirent.h>
+
+#include "check_dir.h"
+
+/*
+ * make sure the directory either doesn't exist or is empty
+ * we use this function to check the new data directory and
+ * the directories for tablespaces
+ *
+ * This is the same check initdb does on the new PGDATA dir
+ *
+ * Returns 0 if nonexistent, 1 if exists and empty, 2 if not empty,
+ * or -1 if trouble accessing directory
+ */
+int
+check_dir(const char *dir)
+{
+    DIR        *chkdir;
+    struct 		dirent *file;
+    int         result = 1;
+
+	char		*dummy_file;
+	FILE 		*dummy_fd;
+
+    errno = 0;
+
+    chkdir = opendir(dir);
+
+    if (!chkdir)
+        return (errno == ENOENT) ? 0 : -1;
+
+    while ((file = readdir(chkdir)) != NULL)
+    {
+        if (strcmp(".", file->d_name) == 0 ||
+            strcmp("..", file->d_name) == 0)
+        {
+            /* skip this and parent directory */
+            continue;
+        }
+        else
+        {
+            result = 2;         /* not empty */
+            break;
+        }
+    }
+
+#ifdef WIN32
+    /*
+     * This fix is in mingw cvs (runtime/mingwex/dirent.c rev 1.4), but not in
+     * released version
+     */
+    if (GetLastError() == ERROR_NO_MORE_FILES)
+        errno = 0;
+#endif
+
+    closedir(chkdir);
+
+    if (errno != 0)
+        return -1          /* some kind of I/O error? */
+
+	return result;
+}
+
+
+/*
+ * Create directory 
+ */
+bool
+create_directory(const char *dir)
+{
+    if (mkdir_p(dir, 0700) == 0)
+        return true;
+
+    fprintf(stderr, _("Could not create directory \"%s\": %s\n"),
+            dir, strerror(errno));
+
+    return false;
+}
+
+bool
+set_directory_permissions(const char *dir)
+{
+	return (chmod(data_dir, 0700) != 0) ? false : true;
+}