first commit for openGauss server

src/bin/pg_ctl/streamutil.cpp

@@ -0,0 +1,65 @@
+/* -------------------------------------------------------------------------
+ *
+ * streamutil.c - utility functions for pg_basebackup and pg_receivelog
+ *
+ * Author: Magnus Hagander <magnus@hagander.net>
+ *
+ * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
+ *
+ * IDENTIFICATION
+ *		  src/bin/pg_basebackup/streamutil.c
+ * -------------------------------------------------------------------------
+ */
+
+/*
+ * We have to use postgres.h not postgres_fe.h here, because there's so much
+ * backend-only stuff in the XLOG include files we need.  But we need a
+ * frontend-ish environment otherwise.	Hence this ugly hack.
+ */
+#define FRONTEND 1
+#include "postgres.h"
+#include "knl/knl_variable.h"
+#include "streamutil.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include "bin/elog.h"
+#include "logging.h"
+
+PGconn* streamConn = NULL;
+char* replication_slot = NULL;
+/*
+ * strdup() and malloc() replacements that prints an error and exits
+ * if something goes wrong. Can never return NULL.
+ */
+char* xstrdup(const char* s)
+{
+    char* result = NULL;
+
+    result = strdup(s);
+    if (result == NULL) {
+        pg_log(PG_PRINT, _("%s: out of memory\n"), progname);
+        exit(1);
+    }
+    return result;
+}
+
+void* xmalloc0(int size)
+{
+    void* result = NULL;
+
+    /* Avoid unportable behavior of malloc(0) */
+    if (size == 0) {
+        pg_log(PG_PRINT, _("%s: malloc 0\n"), progname);
+        exit(1);
+    }
+    result = malloc(size);
+    if (result == NULL) {
+        pg_log(PG_PRINT, _("%s: out of memory\n"), progname);
+        exit(1);
+    }
+    errno_t errorno = memset_s(result, (size_t)size, 0, (size_t)size);
+    securec_check_c(errorno, "", "");
+    return result;
+}