The R13B03 release.OTP_R13B03

1 files changed, 91 insertions, 0 deletions

diff --git a/lib/erl_interface/src/legacy/global_whereis.c b/lib/erl_interface/src/legacy/global_whereis.c
new file mode 100644
index 0000000000..2afb193504
--- /dev/null
+++ b/lib/erl_interface/src/legacy/global_whereis.c
@@ -0,0 +1,91 @@
+/*
+ * %CopyrightBegin%
+ * 
+ * Copyright Ericsson AB 1998-2009. All Rights Reserved.
+ * 
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ * 
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ * 
+ * %CopyrightEnd%
+ */
+#include <stdlib.h>
+#include <string.h>
+#include "eidef.h"
+#include "eiext.h"
+#include "eisend.h"
+#include "eirecv.h"
+#include "ei_connect_int.h"
+#include "erl_interface.h"
+#include "erl_connect.h"
+
+/* return the ETERM pid corresponding to name. If caller
+ * provides non-NULL node, nodename will be returned there
+ */
+/* global:whereis_name(name) -> pid */
+
+ETERM *erl_global_whereis(int fd, const char *name, char *node)
+{
+  char buf[EISMALLBUF];
+  char *bufp=buf;
+  char tmpbuf[64];
+  int index = 0;
+  erlang_pid *self = erl_self();
+  erlang_pid epid;
+  ETERM *opid;
+  erlang_msg msg;
+  int i;
+  int version,arity,msglen;
+
+  self->num = fd;		/* FIXME looks strange to change something?! */
+
+  ei_encode_version(buf,&index);
+  ei_encode_tuple_header(buf,&index,2);
+  ei_encode_pid(buf,&index,self);               /* PidFrom */
+  ei_encode_tuple_header(buf,&index,5);
+  ei_encode_atom(buf,&index,"call");            /* call */
+  ei_encode_atom(buf,&index,"global");          /* Mod */
+  ei_encode_atom(buf,&index,"whereis_name");    /* Fun */
+  ei_encode_list_header(buf,&index,1);          /* Args: [ name ] */
+  ei_encode_atom(buf,&index,name);
+  ei_encode_empty_list(buf,&index);
+  ei_encode_atom(buf,&index,"user");            /* user */
+
+  /* make the rpc call */
+  if (ei_send_reg_encoded(fd,self,"rex",buf,index)) return NULL;
+
+  while (1) {
+    index = EISMALLBUF;
+    if (!(i = ei_recv_internal(fd,&bufp,&index,&msg,&msglen,1,0))) continue;
+    else break;
+  }
+
+  if (i != ERL_SEND) return NULL;
+    
+  /* expecting { rex, pid } */
+  index = 0;
+  if (ei_decode_version(buf,&index,&version) 
+      || ei_decode_tuple_header(buf,&index,&arity) 
+      || (arity != 2) 
+      || ei_decode_atom(buf,&index,tmpbuf) 
+      || strcmp(tmpbuf,"rex")
+      || ei_decode_pid(buf,&index,&epid))
+    return NULL; /* bad response from other side */
+
+  /* put the pid into a format for the caller */
+  index = 0;
+  ei_encode_pid(buf,&index,&epid);
+  opid = erl_decode((unsigned char*)buf);
+
+  /* extract the nodename for the caller */
+  if (node) strcpy(node,epid.node);
+
+  return opid;
+}